Abstract

A method of inserting a downhole assembly into a live wellbore, includes: assembling a pressure control assembly (PCA) onto a production tree of the live wellbore; inserting a first deployment section of the downhole assembly into a lubricator; landing the lubricator onto the PCA; connecting the lubricator to the PCA; lowering the first deployment section into the PCA; engaging a clamp of the PCA with the first deployment section; after engaging the clamp, isolating an upper portion of the PCA from a lower portion of the PCA; and after isolating the PCA, removing the lubricator from the PCA.

IPC Classes  ?

• E21B 19/16 - Connecting or disconnecting pipe couplings or joints
• E21B 33/072 - Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells for cable-operated tools
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

Abstract

Embodiments of the present invention generally relate to a power and control pod for subsea artificial lift system. In one embodiment, a method of operating a downhole tool in a subsea wellbore includes: supplying a direct current (DC) power signal from a dry location to a subsea control pod; converting the DC power signal to an alternating current (AC) power signal by the control pod; and supplying the AC power signal from the control pod, into the subsea wellbore, and to the downhole tool.

IPC Classes  ?

• E21B 33/035 - Well heads; Setting-up thereof specially adapted for underwater installations
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

Abstract

A method of deploying a downhole tool into a wellbore includes: lowering a cable into the wellbore; after lowering the cable, engaging a mold with an outer surface of the cable; injecting sealant into the mold and into armor of the cable, thereby sealing a portion of the cable; lowering the downhole tool to a deployment depth using the cable; engaging a seal with the sealed portion of the cable; and operating the downhole tool using the cable.

IPC Classes  ?

• E21B 33/072 - Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells for cable-operated tools
• E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells

Abstract

A method of unloading liquid from a reservoir includes deploying a pumping system into a wellbore to a location proximate the reservoir using a cable. The pumping system includes a multi-section motor, an isolation device, and a pump. The method further includes supplying a power signal from the surface to the motor via the cable and sequentially operating each section of the motor to mimic a multi-phase motor, thereby driving the pump and lowering a liquid level in the tubular string to a level proximate the reservoir.

IPC Classes  ?

• E21B 43/00 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells

Abstract

A power transmission system for use with downhole equipment in a borehole includes a power source that is positioned at the surface providing a DC power supply, a downhole DC/DC converter and a two-conductor cable connecting the power source and the downhole DC/DC converter. The power transmission system receives the DC voltage supply as an input and provides an output DC supply at a different voltage to the DC power supply for provision to the downhole equipment.

IPC Classes  ?

• E21B 4/04 - Electric drives