An embodiment of a PCD insert comprises an embodiment of a PCD element joined to a cemented carbide substrate at an interface. The PCD element has internal diamond surfaces defining interstices between them. The PCD element comprises a masked or passivated region and an unmasked or unpassivated region, the unmasked or unpassivated region defining a boundary with the substrate, the boundary being the interface. At least some of the internal diamond surfaces of the masked or passivated region contact a mask or passivation medium, and some or all of the interstices of the masked or passivated region and of the unmasked or unpassivated region are at least partially filled with an infiltrant material.
E21B 10/573 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
C04B 35/63 - Preparing or treating the powders individually or as batches using additives specially adapted for forming the products
A superhard construction comprises a substrate comprising a peripheral surface, an interface surface and a longitudinal axis and a super hard material layer formed over the substrate and having an exposed outer surface forming a working surface, a peripheral surface extending therefrom and an interface surface. One of the interface surface of the substrate or the interface surface of the super hard material layer comprises one or more projections arranged to project from the interface surface, the height of the one or more projections being between around 0.2 mm to around 1.0 mm measured from the lowest point on the interface surface from which the one or more projections extend.
E21B 10/573 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
A system and method for logging in a wellbore where sensor assemblies on a logging tool are deployed and landed in the wellbore. After the sensor assemblies are landed in the wellbore and released from the logging tool, the logging tool is pulled uphole. Moving the logging tool uphole from where the sensor assemblies are landed, reduces interference of the logging tool with measurements obtained with the sensor assemblies. The sensor assemblies include sensors for detecting fluid flow, pressure, temperature, fluid density, formation resistivity, and which can be mechanical, optical, acoustic, or electromagnetic.
E21B 49/08 - Obtaining fluid samples or testing fluids, in boreholes or wells
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
E21B 49/00 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
A system including a subsea module, a tool hanger, and an in-well tool string coupled to and extending from a lower portion of the tool hanger is provided. The subsea module includes a subsea spool with a main bore formed therethrough, and the main bore includes a tool hanger interface. The subsea module also includes a connector for mounting the subsea module on a subsea component, wherein the connector includes a grip configured to engage the subsea component, and a first seal coupled to the connector and configured to seal the connector against the subsea component. The tool hanger is disposed within the main bore and coupled to the tool hanger interface via at least a second seal configured to seal the tool hanger against the main bore of the subsea spool. The in-well tool string is configured to couple the tool hanger to an in-well tool.
A system and apparatus for providing an apparatus for use in a wellbore. The apparatus includes an apparatus body defining a volume, a propellant disposed within the volume, wherein the propellant has a first burn rate, and at least one propellant insert disposed within the propellant, wherein the propellant insert has a second burn rate, and the second burn rate is different than the first burn rate.
C06B 45/12 - Compositions or products which are defined by structure or arrangement of component or product having contiguous layers or zones
F42B 3/04 - Blasting cartridges, i.e. case and explosive for producing gas under pressure
F42B 3/22 - Elements for controlling or guiding the detonation wave, e.g. tubes
E21B 23/06 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
C06B 45/00 - Compositions or products which are defined by structure or arrangement of component or product
C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
D03D 23/00 - General weaving methods not special to the production of any particular woven fabric or the use of any particular loom; Weaves not provided for in any other single group
An electrical submersible well pump motor (21) has metal -to-metal sealing for the power cable electrical connection. A conductor passage (47) in the motor head (29) has a conical seat (53). A motor contact member (62) electrically connected with the motor is located in the conductor passage below the seat. A metal tube (35) has a lower portion that inserts into an upper portion of the conductor passage. A metal sealing ferrule (69) encircles the tube, and a compression nut (71) deforms the ferrule into sealing engagement with the seat and the tube. An electrical conductor (73) extending from the power cable (27) protrudes downward from the tube and has a conductor contact member (75) on a lower end. The motor contact member and the conductor contact member stab into partial engagement with each other, defining a gap (85) between terminal surfaces of the contact members that can close up during operation due to thermal growth.
A polycrystalline diamond compact includes a polycrystalline diamond material having a plurality of grains of diamond bonded to one another by inter-granular bonds and an intermetallic gamma prime (γ′) or κ-carbide phase disposed within interstitial spaces between the inter-bonded diamond grains. The ordered intermetallic gamma prime (γ′) or κ-carbide phase includes a Group VIII metal, aluminum, and a stabilizer. An earth-boring tool includes a bit body and a polycrystalline diamond compact secured to the bit body. A method of forming polycrystalline diamond includes subjecting diamond particles in the presence of a metal material comprising a Group VIII metal and aluminum to a pressure of at least 4.5 GPa and a temperature of at least 1,000° C. to form inter-granular bonds between adjacent diamond particles, cooling the diamond particles and the metal material to a temperature below 500° C., and forming an intermetallic gamma prime (γ′) or κ-carbide phase adjacent the diamond particles.
A method of predicting behavior of a drilling assembly includes: generating a mathematical representation of a geometry of each of a plurality of components of a drilling assembly, the plurality of components including a plurality of cutters and one or more additional components configured to at least one of: support the plurality of cutters and operably connect the plurality of cutters to the drill string, the one or more additional components including a drill bit crown; simulating one or more operating conditions incident on the drilling assembly representation, and simulating an interaction between the plurality of components and an earth formation; and predicting physical responses of the drilling assembly representation to the one or more conditions.
G06G 7/48 - Analogue computers for specific processes, systems, or devices, e.g. simulators
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
G01V 99/00 - Subject matter not provided for in other groups of this subclass
E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
A rotatable element for an earth-boring tool in a subterranean borehole includes a rotatable element and a stationary element. The rotatable element and stationary element include a seal arrangement between the rotatable element and the stationary element. The seal arrangement encloses a volume that remains substantially constant as the rotatable element moves relative to the stationary element.
E21B 10/25 - Roller bits - characterised by bearing, lubrication or sealing details - characterised by sealing details
E21B 10/32 - Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
E21B 10/46 - Drill bits characterised by wear resisting parts, e.g. diamond inserts
E21B 10/62 - Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
E21B 10/573 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
E21B 10/55 - Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
A well tool includes a first component, a second component having a passage for receiving the first component, and an anchor assembly. The anchor assembly includes at least one anchor positioned on the first component that is received by at least one profile formed on an inner surface defining the passage of the second component. Either or both of the at least one profile and the at least one anchor include a ramp section that has a ramp contour defined by a ramp tangent. The ramp tangent forms an acute angle with a longitudinal axis of the borehole. A related method includes the steps of forming at least one profile in the second component, the at least one profile including a ramped section; disposing at least one anchor in the first component; and lowering the first component relative to the second component until the first anchor and the first profile align the first component and the second component in a predetermined relative alignment.
E21B 17/046 - Couplings; Joints between rod and bit, or between rod and rod with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
E21B 7/20 - Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
11.
USE OF SEQUESTERING AGENT IN GLDA-BASED TREATMENTS FOR SILICEOUS FORMATIONS
Sandstone formations of oil and gas and geothermal wells may be successfully stimulated with a fluid containing GLDA or salt and HF or a HF-generating component and an organophosphonate component. The organophosphonate acts as a sequestering agent and reduces the amount of metal fluoride precipitates produced.
An embodiment of a method of detecting and correcting for spiraling in a downhole carrier includes: deploying the carrier in a borehole in an earth formation as part of a subterranean operation; acquiring time based data from at least one sensor disposed at the carrier; acquiring time and depth data, the time and depth data correlating time values with depths of the carrier; generating a depth based profile based on the time based data and the time and depth data; generating a frequency profile by transforming the depth based profile into the frequency domain; detecting a spiraling event based on an amplitude of the frequency profile; and taking corrective action based on detecting the spiraling event.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
A method of cementing a wellbore comprises injecting into the wellbore a cement slurry comprising an aqueous carrier, a swellable nanoclay, and a solid delayed releasing divalent inorganic salt comprising calcined magnesium oxide, calcined calcium oxide, calcium magnesium polyphosphate,, a borate, a nitride, a silicate, an agent having a cation of Ba2+, Sr2+, Fe2+, Ni2+, or a combination comprising at least one of the foregoing; and allowing the cement slurry to set.
C09K 8/42 - Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
C09K 8/46 - Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
C09K 8/467 - Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
E21B 33/13 - Methods or devices for cementing, for plugging holes, crevices, or the like
A sensor configuration including a centralizer having a rib, a hollow defined within the rib, and a sensor positioned within the hollow. A borehole system including a borehole, a tubular string disposed within the borehole, a centralizer having a rib, and the rib defining a hollow, disposed upon the tubular string, a sensor within the hollow. A method for acquiring data in a borehole including running a sensor configuration as in any prior embodiment on a tubular string into a borehole, cementing the tubular string in the borehole, and sensing with the sensor configuration, a parameter in the borehole.
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
Earth-boring tools may include a body, blades extending outward from the body, and cutting elements secured to the blades. An entirety of a first blade may exhibit a first, constant or continuously variable radius of curvature different from a second, constant or continuously variable radius of curvature of at least another portion of a second blade. Methods of making earth-boring tools may involve forming at least a portion of a first blade extending outward from a body to exhibit a first radius of curvature. An entirety of a second blade extending outward from the body may be formed to exhibit a second, different, constant or continuously variable radius of curvature. Cutting elements may be secured to the first and second blades.
E21B 10/43 - Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
Examples of techniques monitoring pump health are disclosed. In one example implementation, a method may include: collecting, by a processing device, pump data about the pump, wherein the pump data comprises vibration data, timing data, and pressure data collected from vibration sensors, a timing sensor, and pressure sensors respectively; conditioning, by the processing device, the pump data by dividing the pump data into a plurality of segments, wherein each of the plurality of segments represents one completion cycle of the pump; analyzing, by the processing device, the plurality of segments of pump data to determine a valve and valve seat wear state of the pump using a self-organizing map generated from historical pump data; and changing, by the processing device, an operational parameter of the pump responsive to determining that the valve and valve seat wear state of the pump represents a risk level that is above a threshold.
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
17.
EARTH-BORING TOOLS UTILIZING SELECTIVE PLACEMENT OF POLISHED AND NON-POLISHED CUTTING ELEMENTS, AND RELATED METHODS
An earth-boring tool includes a body having a longitudinal axis. The earth-boring tool also includes blades extending longitudinally and generally radially from the body. The earth-boring tool may also include one or more polished superabrasive cutting elements located on at least one blade in at least one region of a face of the earth-boring tool, and one or more non-polished superabrasive cutting elements located on the at least one blade in at least another region of the face of the earth-boring tool. Methods include drilling a subterranean formation including engaging a formation with one or more polished superabrasive cutting elements and one or more non-polished superabrasive cutting elements of the earth-boring tool secured at selected locations of one or more regions of blades extending from a body of the earth-boring tool.
Systems and methods for downhole component monitoring including a monitored component doped with a pre-selected neutron absorbent, the monitored component being part of a downhole tool and a neutron monitoring system positioned relative to the monitored component. The neutron monitoring system includes a neutron source positioned at a first location relative to the monitored component and a neutron detector positioned at a second location relative to the monitored component, the neutron detector configured to detect neutrons from the neutron source and count said detected neutrons. A control unit is in communication with the neutron detector and configured to determine a status of the monitored component from the neutron count received from the neutron detector.
G01V 5/10 - Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
19.
Earth-boring tools including passively adjustable, aggressiveness-modifying members and related methods
Earth-boring tools may include a body and a passively adjustable, aggressiveness-modifying member secured to the body. The passively adjustable, aggressiveness-modifying member may be movable between a first position in which the earth-boring tool exhibits a first aggressiveness and a second position in which the earth-boring tool exhibits a second, different aggressiveness responsive to forces acting on the passively adjustable, aggressiveness-modifying member.
BP Exploration Operating Company Limited (United Kingdom)
Inventor
Curry, David A.
Pessier, Rudolf Carl
Spencer, Reed W.
Kuesters, Andrea
Wingate, John
Abstract
Methods of drilling earth formations may involve removing a portion of an underlying earth formation utilizing cutting elements of an earth-boring drill bit. A rotational speed of the drill string may be sensed utilizing a first sensor. A rate of penetration of the drill string during advancement of the earth-boring drill bit may be sensed utilizing a second sensor. An instantaneous average depth of cut of cutting elements of the earth-boring drill bit may be determined utilizing a control unit to calculate the instantaneous average depth of cut based on a sensed rotational speed of the drill string and a sensed speed of advancement of the drill string. The weight on the earth-boring drill bit may be increased utilizing the drawworks when the instantaneous average depth of cut is less than the predetermined minimum depth of cut.
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 45/00 - Measuring the drilling time or rate of penetration
BP EXPLORATION OPERATING COMPANY LIMITED (United Kingdom)
Inventor
Curry, David A.
Pessier, Rudolf Carl
Spencer, Reed W.
Kuesters, Andrew
Wingate, John
Abstract
Methods of drilling earth formations may involve removing a portion of an underlying earth formation utilizing cutting elements of an earth-boring drill bit. A rotational speed of the drill string may be sensed utilizing a first sensor. A rate of penetration of the drill string during advancement of the earth-boring drill bit may be sensed utilizing a second sensor. An instantaneous average depth of cut of cutting elements of the earth-boring drill bit may be determined utilizing a control unit to calculate the instantaneous average depth of cut based on a sensed rotational speed of the drill string and a sensed speed of advancement of the drill string. The weight on the earth-boring drill bit may be increased utilizing the drawworks when the instantaneous average depth of cut is less than the predetermined minimum depth of cut.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 41/00 - Equipment or details not covered by groups
Systems, methods and apparatuses to aid with directional drilling through a subterranean formation are described. A model is provided that is indicative of: (i) one or more frictional forces at one or more contact points of the BHA and a wall of a non-linear borehole through a subterranean formation, (ii) one or more internal torques of the BHA between the one or more contact points, and (iii) one or more internal torques of the drillstring between the one or more contact points. Based on the model, a toolface severity is determined for the drilling system, the toolface severity corresponding to a change in angular deflection for a change in applied weight-on-bit (WOB) of the BHA. A design is selected for the drilling system based on a comparison of the toolface severity to another toolface severity for a different design. Drilling may be performed by a drilling system having a bottomhole assembly (BHA) optimized to reduce fluctuations in toolface orientation along a non-linear borehole.
Magnetic sample holders for abrasive operations include an array of magnets embedded in a matrix material. Each magnet of the array is positioned between about 0 mm and about 4 mm from at least one adjacent magnet of the array. Exposed surfaces of the magnets of the array are coplanar with a planar working surface of the matrix material. Methods of forming a poly crystalline diamond compact element include magnetically securing an alloy sample to an array of magnets embedded in a matrix. Each of the magnets of the array is within about 4 mm of at least one adjacent magnet of the array. A portion of the alloy sample is abraded away, and the alloy sample is positioned proximate to diamond grains and a substrate. The alloy sample, diamond grains, and substrate are subjected to a high pressure/high temperature process to sinter the diamond grains.
Systems, methods, and devices for evaluation of an earth formation intersected by a borehole using a logging tool. Methods include performing EM logging in a borehole intersecting an earth formation using a measurement signal from an antenna system in the borehole, the measurement signal dependent upon a parameter of interest of the formation and at least one antenna system parameter of the antenna system, comprising feeding a calibration signal into a signal path of the antenna system to generate a resultant signal; estimating at least one value of the at least one antenna system parameter by using the resultant signal; and performing further logging operations in dependence upon the at least one value of the at least one antenna system parameter. The calibration signal comprises at least two calibration subsignals with a first calibration subsignal having a first frequency and a second calibration subsignal having a second frequency.
A dual telemetric coiled tubing running string for disposing a bottom hole assembly into a wellbore. The dual telemetric coiled tubing running string includes a string of coiled tubing which defines a flowbore along its length, an electrical wire conduit disposed within the flowbore, and an optic fiber disposed within the flowbore.
E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Methods of using a component in a subterranean wellbore include positioning a component including a degradable thermoset polymer material in a wellbore location, obstructing flow with the component, exposing the component to an acidic solution to degrade the selectively degradable thermoset polymer material and to remove the component from the wellbore location, and flowing a fluid through the wellbore location where the component was positioned. Methods of forming a component of a wellbore system include forming at least a portion of the component to comprise a degradable thermoset polymer material. Wellbore systems include at least one component including a selectively degradable thermoset polymer material. The selectively degradable thermoset polymer material may be a polyhexahydrotriazine (“PHT”) material.
E21B 43/28 - Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
E21B 29/02 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means
C09K 8/508 - Compositions based on water or polar solvents containing organic compounds macromolecular compounds
A system including a subsea module, a tool hanger, and an in-well tool string coupled to and extending from a lower portion of the tool hanger is provided. The subsea module includes a subsea spool with a main bore formed therethrough, and the main bore includes a tool hanger interface. The subsea module also includes a connector for mounting the subsea module on a subsea component, wherein the connector includes a grip configured to engage the subsea component, and a first seal coupled to the connector and configured to seal the connector against the subsea component. The tool hanger is disposed within the main bore and coupled to the tool hanger interface via at least a second seal configured to seal the tool hanger against the main bore of the subsea spool. The in-well tool string is configured to couple the tool hanger to an in-well tool.
Core sample catchers for use with coring tools for obtaining core samples from subterranean formations may include at least one flap catcher member configured to be movably coupled to an inner barrel of the coring tool and configured to move between an open position and a closed position. A piston member including a central bore may be disposed in a passageway extending through the inner barrel. The piston member may be configured to move between a first position and a second position, the piston member configured to retain the at least one flap catcher member in the open position when the piston member is in the first position, and allow flap catcher member to move into the closed position when the piston member is in the second position.
E21B 25/10 - Formed core retaining or severing means
E21B 25/14 - Formed core retaining or severing means mounted on pivot transverse to core axis
E21B 25/00 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
E21B 25/04 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe the core receiver having a core forming cutting edge or element, e.g. punch type core barrels
A system including a subsea module, a tool hanger, and an in-well tool string coupled to and extending from a lower portion of the tool hanger is provided. The subsea module includes a subsea spool with a main bore formed therethrough, and the main bore includes a tool hanger interface. The subsea module also includes a connector for mounting the subsea module on a subsea component, wherein the connector includes a grip configured to engage the subsea component, and a first seal coupled to the connector and configured to seal the connector against the subsea component. The tool hanger is disposed within the main bore and coupled to the tool hanger interface via at least a second seal configured to seal the tool hanger against the main bore of the subsea spool. The in-well tool string is configured to couple the tool hanger to an in-well tool.
A cutting element comprises a supporting substrate exhibiting a three-dimensional, laterally elongate shape, and a cutting table of a poly crystalline hard material attached to the supporting substrate and comprising a non-planar cutting face. An earth-boring tool and method of forming an earth-boring tool are also described.
A method of producing hydrocarbon from a subterranean formation comprises: disposing an article in a well penetrating a subterranean formation, the article having a surface coated with a hierarchical superhydrophobic coating or the article being a stand-alone hierarchical superhydrophobic membrane; contacting the article with a flow of a water-based fluid and an oil-based fluid; selectively impeding the flow of the water-based fluid; and allowing the production of the oil-based fluid.
A system and method for logging in a wellbore where sensor assemblies on a logging tool are deployed and landed in the wellbore. After the sensor assemblies are landed in the wellbore and released from the logging tool, the logging tool is pulled uphole. Moving the logging tool uphole from where the sensor assemblies are landed, reduces interference of the logging tool with measurements obtained with the sensor assemblies. The sensor assemblies include sensors for detecting fluid flow, pressure, temperature, fluid density, formation resistivity, and which can be mechanical, optical, acoustic, or electromagnetic.
E21B 49/08 - Obtaining fluid samples or testing fluids, in boreholes or wells
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
E21B 23/00 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
E21B 49/00 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
33.
TREATMENT METHODS FOR WATER OR GAS REDUCTION IN HYDROCARBON PRODUCTION WELLS
Systems and methods for reducing unwanted water and/or gas intrusion into a hydrocarbon production wellbore. The system includes a treatment injection tool for injecting a treatment agent into portions of the formation surrounding the wellbore and a tunneling tool for forming one or more tunnels within the formation. Sensors provide real-time information about wellbore parameters during treatment so that wellbore analysis can be conducted.
A degradable polymer composite comprises a polyurethane comprising one or more of the following groups: ester groups; carbonate groups; or ether groups, in a backbone of the polyurethane; and about 1 to about 30 parts by weight of an acidic or basic powder comprising particles having an average size of about 5 microns to about 1 millimeter per 100 parts of the polyurethane.
A method of forming a cutting element comprises disposing diamond particles in a container and disposing a metal powder on a side of the diamond particles. The diamond particles and the metal powder are sintered so as to form a polycrystalline diamond material and a low-carbon steel material comprising less than 0.02 weight percent carbon and comprising an intermetallic precipitate on a side of the polycrystalline diamond material. Related cutting elements and earth-boring tools are also disclosed.
An embodiment of a method of performing aspects of a downhole operation includes receiving a measurement value from a first sensor configured to measure a parameter related to the downhole operation, receiving measurement data from a different sensor, the measurement data related to the downhole operation, and performing, by a sensor evaluation module, an evaluation of the first sensor. The evaluation includes determining a condition of the first sensor based on the measurement data from the different sensor, selecting a rule that prescribes a set of one or more measurement values of the parameter that are plausible if the condition is met, and determining whether the measurement value from the first sensor is plausible based on comparing the measurement value to the prescribed set of one or more measurement values.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
An electro-hydraulic actuator includes a housing having an interior portion a first opening and a second opening, a transducer is arranged in the interior portion. The transducer includes a sensor operatively coupled to a signal source at the first opening. A selectively activatable valve component is arranged at the second opening. The selectively activatable valve component maintains a desired pressure in the interior portion of the housing. An actuator is operatively coupled to the transducer and operable to activate the selectively activatable valve component exposing the interior portion to a volume of fluid in response to a signal from the transducer to activate a downhole system.
E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
A downhole component includes a body and a stress riser formed in the body. The stress riser being positioned and shaped to promote a full fracture of the body while maintaining a structure of the body to bear force in at least one direction. A downhole system having a tubular string disposed in a borehole.
A dry bulk pneumatic metering system includes a flow line configured for the passage of pneumatically-conveyed bulk material, a bulk material sensor arranged relative to the flow line, the bulk material sensor configured to send a first signal related to a quantity of the bulk material passing in the flow line and within a range of the bulk material sensor, a speed sensor arranged with respect to at least one area of the system, the speed sensor configured to send a second signal related to the speed of gas flow at the at least one area of the system, and a controller arranged to receive the first and second signals and configured to calculate a bulk material flow rate of the bulk material using the first and second signals.
B65G 53/66 - Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
Methods, systems, devices, and products for evaluating a downhole fluid in a borehole intersecting an earth formation. Methods include using ultrasonic irradiation to produce sonoluminescence from cavitation in a volume of the fluid; obtaining spectral information from measurement of the sonoluminescence with a light-responsive device; and estimating a parameter of interest of the fluid from the spectral information. The parameter may be a composition of the fluid or concentration of: i) at least one chemical element in the volume; i) at least one molecular element in the volume. Methods include deconvolving a response spectrum by using one or more separately determined standard spectra, or estimating the parameter of interest using spectral lines represented by the spectral information. Methods may include using an optically transparent ultrasonic transducer to produce the cavitation at the interface of the transducer, with optically transparent ultrasonic transducer between the interface and the light-responsive device.
A method of passing downhole fluids through a screen assembly mounted to a tubular run into a well bore. The screen assembly has a plurality of screen sections arranged at a resource production zone between a first swellable member and a second swellable member. The method includes passing a fluid through an annular screen of the plurality of screen sections into the tubular. At least a portion of the fluid includes particulate matter. Particulate matter is accumulated at the annular screen. Particulate matter is detected in the fluid. The fluid passes into one or more of a plurality of inner screen compartments provided on an inner tubular member radially inwardly spaced from the tubular, and the fluid is filtered through an erosion resistant annular screen of one or more of the plurality of inner screen compartments.
A slip device for anchoring a tubular member within a surrounding tubular, wherein the slip device comprises a slip element that is radially moveable between a radially contracted position and a radially expanded position, wherein the slip element is configured to engage the surrounding tubular in the radially expanded position. The slip device also comprises an electrical solenoid actuator to move the slip element from the radially contracted position to the radially expanded position.
E21B 23/01 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
E21B 33/129 - Packers; Plugs with mechanical slips for hooking into the casing
A downhole system is deployed on wireline and includes a tool and a guide system on it a lower end of the tool for navigating past obstacles within a wellbore. A selectively rotatable tip member projects downward from the guide system. A side of the tip member is curved, so when the tool encounters an obstacle downhole, the tip member rotates so the curved side faces the obstacle and the downhole system can be urged past the obstacle. The guide system includes a sleeve and pedestal that abut one another on opposing ends that are complementarily profiled. When the sleeve and pedestal axially contact one another, the profiled ends produce relative rotation of the sleeve and pedestal. The pedestal is coupled with the tip member and the sleeve is coupled to the tool, so that the relative rotation of the sleeve and pedestal causes the tip member to rotate relative to the tool.
Methods, systems, devices, and products for making formation resistivity measurements including reducing the resistivity of the fluid proximate the electrode using ionizing radiation to induce a transient increase in electrical conductivity of the fluid for the resistivity measurement. The fluid may include oil-based mud. Methods include making the downhole measurement using the electrode during the transient increase. An electrode may be disposed on a pad having a bremsstrahlung assembly disposed thereon. Methods may include mitigating effects of an electrical resistivity of the fluid on the formation resistivity measurement by using the radiation to induce a transient increase in electrical conductivity of the fluid for the formation resistivity measurement. Methods may include using the ionizing radiation to generate at least one of: i) free ions; and ii) free electrons.
G01V 3/26 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
45.
COMPOSITE BODY LOCK RING FOR A BOREHOLE PLUG WITH A LOWER SLIP ASSEMBLY
A borehole plug or packer for treating is designed to be milled out after use. The plug handles differential pressure from above using a lower slip assembly under a sealing element. A setting tool creates relative axial movement of a setting sleeve and a plug mandrel to compress the seal against the surrounding tubular and set the slips moving up a cone against the surrounding tubular to define the set position for the plug. The set position is held by a split lock ring having a wedge or triangular sectional shape and a surface treatment facing the mandrel that slides along the mandrel during setting movement but resists opposed reaction force from the compressed sealing element. The surface treatment can be a series of downhole oriented ridges such as a buttress thread that preferably penetrate the mandrel when holding the set position.
Examples of high-temperature memory modules used in a well operation are disclosed. In one example implementation according to aspects of the present disclosure, a memory module may include: a control unit configured to receive data from a controller in the well operation and further configured to receive an operating temperature downhole in the well operation and to cause the control unit to initiate a shutdown of the memory module if the operating temperature is greater than a first threshold; and a memory controller configured to receive the data from the control unit and to commit the data to storage medium.
G11C 7/04 - Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
G11C 7/10 - Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
G06F 3/06 - Digital input from, or digital output to, record carriers
47.
Activation modules for obstructing entrances to inner barrels of coring tools and related coring tools and methods
Activation modules for selectively sealing entrances to inner barrels of coring tools may include an activator body and an activation rod movable between a first position and a second position. A locking element may temporarily hold the activator body in place and a sealing element may form a temporary seal. The activation rod may include a locking portion, a releasing portion of a smaller diameter, a sealing portion, and an unsealing portion of a smaller diameter. The locking portion may be aligned with the locking element and the sealing portion may be aligned with the sealing element when the activation rod is in the first position. The releasing portion may be aligned with the locking element and the unsealing portion may be aligned with the sealing element when the activation rod is in the second position.
E21B 25/00 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
E21B 49/02 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
A method of treating a subterranean formation penetrated by a well comprises combining an aqueous base fluid, a viscoelastic surfactant gelling agent, two or more types of the following nanoparticles: an alkaline earth metal oxide; an alkaline earth metal hydroxide; a transition metal oxide; or a transition metal hydroxide to form a treatment fluid, and pumping the treatment fluid into the well, wherein the weight ratio of the two or more types of the nanoparticles is selected such that the treatment fluid has an improved fluid efficiency as compared to an otherwise identical reference fluid except for comprising only one type of the nanoparticles selected from an alkaline earth metal oxide; an alkaline earth metal hydroxide; a transition metal oxide; and a transition metal hydroxide.
C09K 8/584 - Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
C09K 8/60 - Compositions for stimulating production by acting on the underground formation
49.
ROLLER CONE EARTH-BORING ROTARY DRILL BITS INCLUDING DISK HEELS AND RELATED SYSTEMS AND METHODS
Earth-boring rotary drill bits include heel portions exhibiting reduced aggressiveness. Earth-boring rotary drill bits may comprise a bit body and a plurality of roller cones coupled to the bit body. Each roller cone comprises a plurality of rows of cutting elements, and a continuous disk heel located further from an axis of rotation of the roller cone than the at least one row of cutting elements, the continuous disk heel exhibiting a reduced amount of aggressiveness compared to the at least one row of cutting elements.
A main bore is drilled and a treatment assembly is located. A packer is located to support a whipstock for drilling the lateral. This packer serves as a lower seal on a main bore diverter. The whipstock is installed on the packer and a mill drills a window and the lateral. The mill is pulled and the whipstock removed with a fixed lug tool. A bottom hole assembly is run into the lateral which includes a diverter that is landed by the window. If cementing is called for it is done at this time. A top string is installed that isolates the upper casing. The lateral is treated with the main bore isolated. The diverter is retrieved through the top string. The main bore diverter is run in through top string and landed in the junction with the window and lateral isolated. The main bore diverter is removed through the top string. The treatment bottom hole assembly has a series of sliding sleeves operated by a single size ball.
An apparatus for controlling a flow of fluid downhole comprises a removable fluid nozzle in fluid communication with a production tubular disposed in a borehole penetrating the earth. The removable fluid nozzle is configured for bi-directional flow, wherein a pressure drop of fluid flow in one direction is greater than the pressure drop of fluid flow in the other direction.
A method of controlling a production process includes illuminating a portion of a workpiece undergoing a production process with a light having a selected wavelength, processing a portion of the workpiece, capturing a digital image of the light reflecting from a surface of the workpiece with a digital camera, performing, with a processor, a specular reflectance analysis of the digital image, and adjusting a production process parameter based on the specular reflectance analysis.
Examples of identifying a component used in a well operation using a leaky coaxial antenna are disclosed. In aspects of the present disclosure, a method may include: reading an electronic identifier connected to a component used in the well operation via the leaky coaxial antenna to obtain a unique identifier, wherein the electronic identifier comprises the unique identifier; identifying the component from a plurality of components by comparing the unique identifier to a plurality of unique identifiers stored in a data store; receiving usage data from a sensor connected to the identified component; storing, by the processing system, the usage data in the data store for the identified component; and determining a failure risk level for the component based at least in part on the stored usage data for the identified component, wherein the leaky coaxial antenna comprises a plurality of radiating regions and a plurality of non-radiating regions.
E21B 41/00 - Equipment or details not covered by groups
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
G08C 17/02 - Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
54.
STACKABLE CONTAINER SYSTEM, OPERATING SYSTEM USING CONTAINER SYSTEM, AND METHOD
A stackable container system configured to carry material includes at least one container having a first end and a second end, a holding area for the material, the holding area extending from the first end to the second end, a first opening at the second end, the material controllably releasable from the holding area through the first opening, and a chute that passes through the holding area, the chute extending from the first end to the second end, a first end of the chute including a receiving portion having a larger area than a combined area of the first opening and a second end of the chute.
An article comprises a substrate, a coating disposed on a surface of the substrate. The coating comprises a carbon composite dispersed in one or more of the following: a polymer matrix; a metallic matrix; or a ceramic matrix. The carbon composite comprises carbon and a binder containing one or more of the following: SiO2; Si; B; B2O3; a filler metal; or an alloy of the filler metal.
B05D 7/24 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
C23C 4/04 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
C25D 3/02 - Electroplating; Baths therefor from solutions
56.
METHOD AND SYSTEMS FOR INTEGRATING DOWNHOLE FLUID DATA WITH SURFACE MUD-GAS DATA
A method for evaluating a formation fluid includes the steps of drilling a borehole intersecting a formation with a drill string, circulating a drilling fluid in the wellbore, selectively liberating a formation fluid from the formation, injecting the liberated fluid into the drilling fluid returning to the surface, drawing a sample of the returning drilling fluid at the surface, and estimating at least one parameter of the drawn sample at the surface.
Dual section mills are selectively sequentially operated by locking an actuator for the backup mill as the primary mill has blades extended with internal flow through a housing. When the primary mill is spent the support string is shifted to defeat a lock on an actuation piston for the backup mill so that its blades can extend and continue to mill to finish the job. The blades of the primary mill continue to rotate in the already milled portion of the window as the secondary mill enlarges the window. Another way the secondary mill is actuated is to open access to flow to the secondary mill by removing a pressure barrier such as a valve or a disappearing plug, for example.
E21B 29/00 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
58.
HEAVE COMPENSATOR FOR CONSTANT FORCE APPLICATION TO A BOREHOLE TOOL
The compensating device has a through passage that goes to the borehole tool. There is a lateral passage to a piston housing. Through the use of a differential piston area on the outer housing, a net uphole force results from backpressure as a result of flow pumped through a section mill that mills in an uphole direction. If the vessel goes down the mill is just pushed away from the tubular being cut. If wave action takes the vessel up fluid is displaced back into the mandrel but the constant force up that is dependent on the existing backpressure in the tubing keeps a steady uphole force on the mill. The tool can be reversed for applications that require a net down force during milling. Rotational locking between the mandrel and the outer housing can be used. Ports are sized to prevent damping responses.
An operating control line is in communication with an operating piston for the safety valve as well as an equalizing piston such that pressure in the operating control line opens the safety valve and holds the equalizer valve closed. A balance chamber receives fluid from an operating piston in the safety valve when the valve opens to displace a floating piston to the open position. Operating control line pressure reduction allows valve closure and opposite floating piston movement to the closed position. If the floating piston is forced by a tubing seal leak against the open position travel stop, pressure in a balance control line against the equalizing valve member moves it from a seat to then equalize pressure on opposed ends of the floating piston allowing a bias force to move the floating piston off the open position stop so the safety valve can open despite the tubing leak.
A whipstock anchor is hydraulically set and locked in the set position. Release occurs with a pull induced component failure that relieves hydraulic pressure that allows the slips to retract. Release can occur with a remotely actuated circuit that burns a retainer for a piston whose movement opens a vent or initiates a chemical reaction to undermine a lock ring. Movement of a single cone or opposed cones extends the slips. The cone angles being different (cone angles do not have to be different, it is preferred to have the slip angles different) adds a skew to the slips and positions the top of the whipstock against the tubular top in a horizontal run. A bottom cap is removable to convert to setting by set down weight or to attach a hydraulically operated packer below the slips. Slips can be extended with radial movement of pistons.
E21B 23/01 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
Methods of determining a pH of a wellbore fluid within a wellbore in communication with a subterranean formation comprise introducing carbon quantum dots into a wellbore fluid, exposing the wellbore fluid to radiation from an electromagnetic radiation source, and measuring at least one fluorescence property of the carbon quantum dots within the wellbore fluid to determine a pH of the wellbore fluid. Related methods of determining a pH of a fluid within a wellbore extending through a subterranean formation are also disclosed.
Core jam indicators for use with coring tools include a plug coupled with an inner barrel and configured to selectively close the entrance of the inner barrel. The plug has at least one fluid port extending through a wall of the plug between an interior and an exterior of the plug. The mandrel at least partially covers the at least one fluid port of the plug in an activated position and the at least one fluid port is at least partially uncovered by the mandrel in a deactivated position. The mandrel is coupled to the inner barrel. A piston force acting on the mandrel resulting from a pressure difference above and below the mandrel acts over an area smaller than a maximum transverse cross-sectional area of the inner barrel. Coring tools include such core jam indicators. Components are provided and assembled to form such core jam indicators.
An apparatus for detecting over-torquing or un-torquing of a threaded connection between components in a borehole penetrating the earth includes: a string of components coupled in series by a threaded connection; a transmission line attached to each component; a signal coupler in communication with the transmission line and disposed on each component at each threaded connection, the signal coupler being configured to transmit the signal to an adjacent signal coupler on an adjacent coupled component in order to transmit a signal along the transmission line attached to the adjacent coupled component; a receiver configured to receive the signal; and a processor in communication with the receiver and configured to: (i) determine a difference between a characteristic of the signal and the characteristic of a reference signal and (ii) transmit an alert signal signifying that the threaded connection is over-torquing or un-torquing in response to the difference exceeding a threshold value.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
E21B 31/00 - Fishing for or freeing objects in boreholes or wells
E21B 43/10 - Setting of casings, screens or liners in wells
E21B 19/16 - Connecting or disconnecting pipe couplings or joints
G01P 15/16 - Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
64.
DOWNHOLE SYSTEMS AND ARTICLES FOR DETERMINING A CONDITION OF A WELLBORE OR DOWNHOLE ARTICLE, AND RELATED METHODS
A method of determining a condition within a wellbore. The method comprises introducing a tubular member in a wellbore extending through a subterranean formation, the tubular member comprising a downhole article including a deformable material disposed around a surface of the tubular member, electrically conductive elements dispersed within the deformable material. The method includes measuring at least one electrical property of the deformable material. At least one of water ingress into the wellbore or an amount of expansion of the deformable material is determined based on the at least one measured electrical property. Related downhole systems and other related methods are also disclosed.
G01V 3/26 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
A device, system, and method for locating collars along a casing string. The device includes a casing collar locator (CCL) and a valve in communication with the CCL connected to a work string. Fluid is pumped down the work string as the device is used to locate collars along a string. Upon detection of a collar, the CCL sends a signal to the valve, which causes the actuation of the valve to decreases a flow area within a work string. The decrease in flow area causes a pressure increase within the work string, which may be detected at the surface to indicate the detection of a collar. The device may include an amplifier and power source to amplify the signal from the CCL to the valve. The CCL may detect collars by a change in magnetic flux or by the detection of a signal emitted by individual collars.
E21B 47/09 - Locating or determining the position of objects in boreholes or wells; Identifying the free or blocked portions of pipes
E21B 34/06 - Valve arrangements for boreholes or wells in wells
E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
66.
Methods and apparatus for measuring hydrogen sulfide in downhole fluids
A method of determining a concentration of hydrogen sulfide in a fluid comprises exposing a sensor to the fluid, the sensor comprising a pair of electrodes defining a gap therebetween and a sensing material bridging the gap between the electrodes, measuring a value of an electrical parameter of the sensor at an applied frequency of greater than about 10 kHz and a voltage of less than about 1.0 volt when the sensor is exposed to the fluid, and determining the concentration of hydrogen sulfide in the fluid based at least in part on the measured value of the electrical parameter. Related apparatuses and methods are also disclosed.
G01V 3/20 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with propagation of electric current
G01N 27/12 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon reaction with a fluid
Methods of forming a volume of hard material on a component of a downhole tool include depositing a film of amorphous carbon on a substrate, irradiating the film of amorphous carbon to form a liquid carbon in an undercooled state, and quenching the liquid carbon to form a layer of quenched carbon on the substrate. A downhole tool comprises a component and a volume of hard material comprising quenched carbon disposed on a surface of the component. Additional downhole tools comprise a component and a polycrystalline compact comprising quenched carbon grains disposed on a surface of the component.
Methods, systems, and devices for evaluating an earth formation intersected by a borehole using information from standard resolution measurements. Methods include generating an image representative of the formation over an interval of borehole depth, the image having a second resolution greater than the first resolution. Generating the image may be carried out by identifying layers corresponding to lithotype facies within the interval, the layers defined by boundaries having boundary locations along the borehole; and using a unified characterization of the formation within the interval determined from the standard resolution measurements and the boundary locations within the interval to solve for a value for the formation parameter corresponding to each layer consistent with the unified characterization of the interval. The unified characterization may be an average value for the formation parameter within the interval.
G01V 1/40 - Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
G01V 3/18 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging
G01V 5/04 - Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
69.
BRANCH PATCH ARRAY FOR REAL TIME MONITORING OF SURFACE MICROSEISMIC WAVES
An apparatus for acquiring seismic wave data includes a network of geophones and a seismic wave data receiving device coupled to the network and configured to receive the seismic wave data as an optical signal and process the seismic data in real time to provide locations and corresponding sizes of fractures in an earth formation. The network of geophones includes: a plurality of geophone channels, each channel having an array of geophones coupled to a field digitizer unit; an array of geophone patches having geophone channels connected in series by a metallic conductor; a plurality of geophone branches having a metallic conductor and a branch digitizer unit to connect geophone patches in series; a plurality of electrical to optical signal converters for converting signals received from branch digitizer units for transmission using an optical fiber; and a plurality of optical fiber segments for transmitting optical signals to the receiving device.
A method of forming a cutting element comprises forming a first material comprising discrete coated particles within a container. The first material is pressed to form a first green structure comprising interbonded coated particles. A second material comprising additional discrete coated particles is formed over the first green structure within the container. The second material is pressed to form a second green structure comprising additional interbonded coated particles. The first green structure and the second green structure are sintered to form a multi-layered cutting table. Additional methods of forming a cutting element, a cutting element, and an earth-boring tool are also described.
The annular space surrounding a flow tube in a subsurface safety valve is sealingly isolated at opposed ends of the flow tube and pressure compensated to the tubing pressure. The subsurface safety valve is inserted and aligned in an outer housing so that hydraulic operating connections are sealingly aligned with opposite hand split ring seals that are properly compressed when the safety valve is secured in its surrounding housing. The assembly is then able to meet high pressure, heavy debris, and marine environment service requirements for subsea conditions with minimal reconfiguration for what would otherwise serve as a borehole subsurface safety valve.
F16K 1/18 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps
72.
HYBRID ELECTRIC MOTOR FOR ELECTRIC SUBMERSIBLE PUMP
Systems and methods for constructing electric motors including both permanent magnet elements and inductive elements. In one embodiment, a motor is implemented of an ESP system has multiple rotor sections that are mounted end-to-end within the bore of the stator. The permanent magnet elements and inductive elements may be combined within individual rotor sections, or they may be segregated so that one rotor section has only one type or the other. The inductive elements of the rotor allow the motor to be started without a VFD, and without knowing the position of the rotor within the motor. The permanent magnet elements synchronize the rotor with the rotating stator fields when the rotor approaches the operating frequency of the drive.
A submersible well pump assembly (11) has a pump (15), a motor (17), and a tubular pressure equalizer housing (23) located between the pump and the motor. A rotatable drive shaft (31) extends within the housing on the axis (32) for driving the pump. A guide tube (29) surrounds the drive shaft, defining an inner annulus (33) between the drive shaft and the guide tube and an outer annulus (35) between the housing and the guide tube. A well fluid inlet path (26) admits well fluid into the outer annulus. A hub assembly (39) is pivotally mounted to the guide tube. The hub assembly has a communication passage (55) with having at least one lateral portion (57) extending away the axis and a communication passage opening (62) spaced from the axis and in fluid communication with the outer annulus. The hub assembly has a counterweight (63) that rotates the communication passage opening to a point above the axis while the axis is horizontal.
Systems and methods for electric motor, where the stator core has one or more stator core sections, each of which is a single-piece unit formed of soft magnetic composite (SMC) material, and where the stator core sections are positioned end-to-end with seals at each end to form a plurality of stator slots, where each of the stator slots extends through each of the stator core sections and is in fluid communication with the others to form a sealed stator chamber. The sealed stator chamber may have an expansion chamber to allow expansion and contraction of dielectric fluid in the stator chamber while maintaining separation of the dielectric oil from lubricating oil which is within the motor but external to the stator chamber. The sealed stator chamber can prevent well fluids that leak into the motor from reaching the stator windings and degrading their insulation.
A mandrel and a packer outer assembly are formed to create spring compartments on opposed sides of a sealing element. The outer assembly is shear pinned to the mandrel to minimize spring travel during setting. Once set in the normal way the presence of the springs transfers load and sustained loads through the connected tubular string in either direction. A load coming from downhole and acting in an uphole direction first compresses the spring located uphole from the sealing assembly so that the loading goes behind the sealing assembly and into the upper spring and ultimately to the upper slips. The reverse happens when the force is coming from uphole of the sealing assembly and acting in a downhole direction. The springs can be a coil, a stack of Belleville washers, fluid pushed through an orifice, a resilient material or a contained compressible fluid, to name some examples.
A hydrocarbon production assembly within a multilateral wellbore, the multilateral wellbore having a main bore portion which extends downwardly from surface and a lateral leg which extends radially away from the main bore portion.
An apparatus for determining torque on bit and bending forces in a drilling assembly. The apparatus includes a body having an inner bore defined by an inner wall and having an outer wall, the body also including first and second light bores disposed between the inner wall and the outer wall and a light emitting assembly arranged and configured to cause a light beam to enter the first and second light bores. The assembly further includes first and second light sensors disposed in or at an end of the first and second light bores, respectively, that measure a location where light that enters the first and second light bores contacts the sensors.
G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
G01L 3/00 - Measuring torque, work, mechanical power, or mechanical efficiency, in general
78.
Methods and systems for monitoring well integrity and increasing the lifetime of a well in a subterranean formation
A system for increasing the detecting degradation of a wellbore. The system comprises a computer memory configured for storing computing instructions and a processor operably coupled to the computer memory. The system comprises a sensor operably coupled to the computer memory and is configured to determine the presence of at least one chemical species indicative of degradation of the wellbore in a fluid exiting the wellbore. Methods of monitoring a wellbore for corrosion or other degradation of one or more components of wellbore equipment are disclosed as are methods of increasing the lifetime of a wellbore.
E21B 49/08 - Obtaining fluid samples or testing fluids, in boreholes or wells
E21B 49/00 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
C09K 8/03 - Specific additives for general use in well-drilling compositions
E21B 49/02 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
A frac plug for use in a plug and perf arrangement to within a wellbore. The frac plug includes a central mandrel and locking portion which can be set within the wellbore. A bypass port is disposed through the central mandrel and is unblocked to fluid flow during setting of the plug assembly. Thereafter, the central mandrel is axially shifted within the set locking portion to block fluid communication across the frac plug.
A submersible well pump assembly (15) has upper and lower seal sections (19, 20) connected between the pump (21) and a motor (17). The seal sections have drive shafts (37, 55) with thrust runners (39, 57) that engage thrust bearing bases (33, 53). The upper drive shaft will undergo a limited amount of downward movement toward the lower drive shaft in response to wear of the upper thrust bearing base. A spring (75) between ends of the drive shafts transfers a portion of the down thrust on the upper drive shaft to the lower drive shaft prior to the limited amount of downward movement of the upper drive shaft toward the lower drive shaft being reached. A rigid stop member (71) in the coupling transfers down thrust directly from the upper drive shaft to the lower drive shaft, bypassing the spring, only after the limited amount of downward movement of the upper drive shaft toward the lower drive shaft has been reached.
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
F04C 2/107 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
F04D 13/08 - Units comprising pumps and their driving means the pump being electrically driven for submerged use
F04D 29/42 - Casings; Connections for working fluid for radial or helico-centrifugal pumps
81.
STRADDLE FRAC TOOL WITH PUMP THROUGH FEATURE APPARATUS AND METHOD
A fracturing tool features spaced releasable packers with an outlet in between. The housing has relatively moving components for opening the frac port between the packers with weight set on the lower packer. Once the frac port is opened the upper packer is set and the pumping begins. The upper packer can be released so that tension can be pulled on the lower packer to close the frac port and open a through passage in the housing. In one embodiment the through passage can be located above the lower packer to a sand jet perforator to clean debris away from the lower packer if it is difficult to release the lower packer or to abrasively perforate through a tubular. In another embodiment the housing outlet can be below bottom packer to perform a treatment further downhole or to operate another tool. The straddle tool can be run in on coiled tubing.
An apparatus for a nuclear detector of a downhole tool and method of manufacturing the apparatus is disclosed. The apparatus includes a single multi-metallic component manufactured using additive manufacturing, wherein the component includes at least a first material having a first density and a second material having a second density. The method includes using additive manufacturing to form the component so that the component includes at least a first material having a first density and a second material having a second density and the first material and the second material form the single multi-metallic component.
An electrical submersible pump assembly (21) has modules, including a pump (23), a seal section (29) and a motor (31). A rotatable first drive shaft (33) in a first one of the modules has a splined end (37) that mates with a splined end (45) of a rotatable second drive shaft (43) in a second one of the modules. An external set of splines (39, 47) is on mating ends of the first drive shaft and the second drive shaft. A coupling (49) has an internal set of splines that mesh with the external set to rotationally couple the first and second drive shafts to each other. A polymer coating (57) is selectively bonded on one of the sets and in sliding engagement with the other set. The coating is a solid polymer material having a lower coefficient of friction than steel alloys of the internal set and the external set.
A nanoparticle composition comprises a ferromagnetic or superparamagnetic metal nanoparticle, and a functionalized carbonaceous coating on a surface of the ferromagnetic or superparamagnetic metal nanoparticle. A magnetorheological fluid comprises the nanoparticle composition.
H01F 1/01 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
85.
Optical sensors for downhole tools and related systems and methods
A method of detecting at least one of an analyte or a condition of a fluid within a subterranean formation includes operably coupling a radiation source to at least one optical fiber coupled to a sensor having optically sensitive materials including at least one of chromophores, fluorophores, metal nanoparticles, or metal oxide nanoparticles dispersed within an optically transparent permeable matrix material. The sensor is contacted within a wellbore with a fluid and the fluid is passed through at least a portion of the sensor. Electromagnetic radiation is transmitted from the radiation source through at least one optical fiber to the sensor and at least one of an absorbance spectrum, an emission spectrum, a maximum absorption intensity, or a maximum emission intensity of electromagnetic radiation passing through the sensor after contacting at least some of the optically sensitive materials with the fluid is measured. Additional methods of determining a concentration of hydrogen sulfide in a fluid within a subterranean formation and related downhole optical sensor assemblies are disclosed.
A subterranean screen assembly comprises a base pipe with end connections to attach to a pipe string and a portion that is perforated or slotted; and a coated screen radially outwardly disposed of the base pipe. The coated screen comprises a screen substrate and a coating disposed on a surface of the screen substrate; the coating comprising an amorphous diamond like carbon doped with about 10 to about 30 atomic percent of silicon, about 10 to about 20 atomic percent of oxygen, or a combination comprising at least one of the foregoing dopants, or a polymer comprising a fluoropolymer, a silicone, or a combination comprising at least one of the foregoing.
B05D 7/24 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
C09D 127/12 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
C09D 183/00 - Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
C09D 201/00 - Coating compositions based on unspecified macromolecular compounds
Methods and apparatus configured to evaluate a volume of interest of an earth formation intersected by a borehole. Apparatus comprise a transceiver electrode on the tool body configured to provide electrical current to the earth formation; a return electrode configured to receive the electrical current returning from the earth formation; a multi-function electrode on the resistivity imager tool; and an electrical system configured to provide current measurements at the transceiver electrode. In the first operational mode, the electrical system maintains the tool body at a first electrical potential, and maintains the multi-function electrode and the transceiver electrode at a second electrical potential; and in the second operational mode, the electrical system maintains the tool body at the first electrical potential, maintains the multi-function electrode at the first electrical potential, and maintains the transceiver electrode at the second potential.
G01V 3/26 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
E21B 49/00 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
88.
RESISTIVITY IMAGER FOR CONDUCTIVE AND NON-CONDUCTIVE MUD
Methods and apparatus configured to evaluate a volume of interest of an earth formation intersected by a borehole. Apparatus comprise a transceiver electrode on the tool body configured to provide electrical current to the earth formation; a return electrode configured to receive the electrical current returning from the earth formation; a multi¬ function electrode on the resistivity imager tool; and an electrical system configured to provide current measurements at the transceiver electrode. In the first operational mode, the electrical system maintains the tool body at a first electrical potential, and maintains the multi-function electrode and the transceiver electrode at a second electrical potential; and in the second operational mode, the electrical system maintains the tool body at the first electrical potential, maintains the multi-function electrode at the first electrical potential, and maintains the transceiver electrode at the second potential.
G01V 3/26 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
G01V 3/34 - Transmitting data to recording or processing apparatus; Recording data
89.
ADDITIVE MANUFACTURING CONTROLLED FAILURE STRUCTURE AND METHOD OF MAKING SAME
A downhole component including a first portion; a second portion; a controlled failure structure between the first portion and second portion. A method for improving efficiency in downhole components.
A method of removing fines and coarse particles from tailings comprises forming a slurry comprising water and oil sands and separating bitumen from tailings comprising fines and coarse particles. Functionalized nanoparticles each comprising a core of carbon nitride and functionalized with one or more exposed cationic groups are mixed with the tailings. The functionalized nanoparticles and the fines interact to form agglomerates comprising the functionalized nanoparticles and the fines attached to the one or more exposed cationic groups. The agglomerates are removed from the tailings to form an aqueous solution having suspended therein fewer fines and coarse particles than are suspended within the tailings.
B01D 21/01 - Separation of suspended solid particles from liquids by sedimentation using flocculating agents
B03B 9/02 - General arrangement of separating plant, e.g. flow sheets specially adapted for oil-sand, oil-chalk, oil-shales, ozokerite, bitumen, or the like
91.
ELECTRICAL FEEDTHROUGH FOR SUBSEA SUBMERSIBLE WELL PUMP IN CANISTER
A subsea pump assembly (11) includes a tubular conduit (13) that has an upstream end plate (15) and an inlet (21) for flowing well fluid into an interior of the conduit. A power cable opening (25) extends through the upstream end plate. An electrical submersible pump (39) and motor (35) are in the interior of the conduit. The motor has a motor assembly housing (51) with an upstream end having an electrical insulator opening (60). An end connection (63) secures the upstream end to an interior side of the upstream end plate with the insulator opening registering with the power cable opening. An insulated electrical connector (67) is mounted in the insulator opening. A motor wire (57) in the motor assembly housing joins to an inner end of the electrical connector. A power conductor (31) extends from exterior of the conduit through the power cable opening and joins to an outer end of the electrical connector.
E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 47/06 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
92.
HYDRAULIC FRACTURING USING SUPER ABSORBENT POLYMER HAVING CONTROLLED PARTICLE SIZE
A hydraulic fracturing process comprises combining an aqueous carrier with a superabsorbent polymer and a plurality of proppant particles to form a fracturing fluid; and disposing the fracturing fluid in a downhole environment. When the aqueous carrier has a total dissolved solid content of equal to or less than 400 parts per million and a hardness of less than 100 parts per million as calcium carbonate, the superabsorbent polymer comprises particles having a size of about 145 microns to about 600 microns. When the aqueous carrier has a total dissolved solid content of greater than 400 parts per million to less than 8,000 parts per million and a hardness of greater than 100 parts per million to less than 2,500 parts per million as calcium carbonate, the superabsorbent polymer comprises particles having a size of about 145 microns to about 300 microns.
A method enables communication with downhole tools during a “flow off” condition by energizing at least one sensor and a controller using a local power source only after flow of drilling fluid has been reduced below the threshold flow rate value. Thereafter, the method involves generating the at least one predetermined pattern into the wellbore, detecting the at least one predetermined pattern using the at least one sensor and the controller, and transmitting a signal using the controller in response to the detected at least one predetermined pattern.
E21B 47/18 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid
An earth-boring tool includes a tool body configured to rotate in a wellbore and carrying at least one extendable element. The at least one extendable element is configured to move between a retracted position and an extended position projecting radially beyond the tool body. The at least one extendable element has a mating surface. The earth-boring tool includes a support structure located in the tool body and having a support surface that is located and configured to face the mating surface of the at least one extendable element when the at least one extendable element is in the extended position. The support surface of the support structure is configured to bear at least a portion of the tangential forces acting on the extendable element during rotation of the earth-boring tool in the wellbore when the at least one extendable element is in the extended position.
E21B 10/26 - Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
E21B 10/32 - Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
Methods and devices for evaluating earth formations. Methods include making a plurality of radiation measurements with a GR detector disposed on a carrier in the borehole and a second GR detector disposed on the carrier by positioning the first GR detector and the second GR detector in the borehole at each borehole depth such that the first GR detector is radially offset from the second GR detector with respect to the longitudinal axis of the borehole; making an estimate of a concentration of at least one chemical element in the formation for each borehole depth for each of the first GR detector and the second GR detector from the plurality of measurements; and estimating an actual concentration of the at least one chemical element using the estimates of the concentration for the first GR detector and the estimates of the concentration for the second GR detector for each borehole depth.
G01V 5/08 - Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
96.
METHODS OF MANUFACTURING DEGRADABLE TOOLS USING A GALVANIC CARRIER AND TOOLS MANUFACTURED THEREOF
A method of manufacturing a degradable article comprises: forming a mixture comprising composite particles dispersed in a metallic matrix material; the composite particles comprising a carrier and a disintegration agent coated on the carrier or embedded in the carrier, or a combination thereof and having a density that is about 0.2 to about 2.5 equivalents to that of the metallic matrix material when measured under the same testing conditions; and molding or casting the mixture to form a degradable article. The disintegration agent forms a plurality of galvanic cells with the metallic matrix material, or the carrier, or a combination thereof, in the degradable article.
B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
B22F 9/00 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
Methods, systems, and devices for evaluating an earth formation intersected by a borehole. Methods may include irradiating the earth formation using a radiation source to provoke radiation from the formation responsive to the irradiation; taking a radiation measurement and thereby generating radiation measurement information by producing light scintillations from a scintillation material responsive to the absorption by the scintillation material of the radiation from the formation and substantial intrinsic radiation of the scintillation material; and estimating a parameter of interest of the earth formation using the radiation measurement information.
G01V 5/10 - Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
G01V 5/12 - Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma- or X-ray sources
98.
CUTTING ELEMENTS, EARTH-BORING TOOLS INCLUDING CUTTING ELEMENTS, AND METHODS OF FORMING CUTTING ELEMENTS
A cutting element comprises a cutting table of a polycrystalline hard material including a cutting face, a sidewall, and at least one peripheral cutting edge portion between the cutting face and the sidewall. A radius of curvature of the peripheral cutting edge portion is greater than a radius of curvature of at least another peripheral edge portion between the cutting face and the sidewall. An earth-boring tool may include one or more such cutting elements.
A method of performing aspects of an energy industry operation includes receiving input data at a processing system, the input data describing an assembly for performing the energy industry operation and properties of the formation, the assembly including a downhole component, the processing system configured to estimate production properties based on mathematical models including at least a model of the downhole component and one or more models for simulating fluid flow in the formation. The method also includes, based on the input data, generating a workflow that includes steps for estimating production properties using the models, receiving a selection from a user specifying a type of analysis to be performed and/or a level of complexity of analysis to be performed, customizing the workflow based on the user selection, estimating the production properties based on the models, where estimating is performed according to a procedure specified by the workflow.
A flowmeter for use in a borehole that includes a transmitter and receivers spaced axially away from the transmitter. Energizing the transmitter creates electrical field lines that extend between the transmitter and the receivers, and that pass through fluid flowing past the flowmeter. The magnitude of the electrical field lines at each of the receivers is measured, and varies in response to different types of fluid flowing past the flowmeter, and changes in phase of the fluid. Example transmitters and receivers include coils and electrodes. The transmitters and receivers can define elongate arrays, where the arrays are arranged parallel to, oblique, or perpendicular to an axis of the borehole. Multiple array orientations provide a radial cross sectional image of the flowing fluid. Thus not only can multi-phase flow be detected, but the type of flow regime can be identified.
G01F 1/58 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
G01V 3/20 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with propagation of electric current
G01V 3/28 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
G01F 1/74 - Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
