Abrégé

A system for installing a powered device in a downhole tube is provided. The system is comprised of a power line disposed along a production tube, terminating in a first power connector, an orientation profile disposed in the vicinity of the first power connector, an assembly including a powered device including a second power connector, an extending orientation means capable of radial outward movement from the assembly, the powered device being lowered down the production tube, causing the extending orientation means to be urged radially outwards to engage with the orientation profile and orient the device, so that the first power connector means and second power connector means engage to connect the powered device to the power line in an automatic manner.

Classes IPC  ?

• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage

Abrégé

A synchronous permanent magnet motor is controlled independently of position sensing means by determining the system parameters including the motor impedance and back-emf and the cable impedance and supplying power according to a predefined voltage : frequency ratio which is determined based on said system parameters to provide a desired rate of acceleration determined by the supply voltage.

Classes IPC  ?

• H02P 1/52 - Dispositions de démarrage de moteurs électriques ou de convertisseurs dynamo-électriques pour faire démarrer des machines dynamo- électriques ou des convertisseurs dynamo-électriques pour faire démarrer individuellement un moteur synchrone par accroissement progressif de la fréquence d'alimentation du moteur
• H02P 25/024 - Moteurs synchrones commandés par la fréquence d’alimentation
• E21B 4/04 - Moyens d'entraînement électriques
• H02P 27/04 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p.ex. tension d’alimentation d’onduleurs ou de convertisseurs

Abrégé

A wet connection system suitable for use in hydrocarbon wells preferably comprises one or more elongate, small diameter conduits (50) which extend down the wellbore (2) and terminate adjacent a locating structure (11) on the production tubing (10). Equipment (70) deployed at the locating structure is connected to one or more self supporting conductors (30) which extend down the conduits from the wellhead (5). Preferably the conductors are retractable and the conduits are sealingly connected to the equipment, allowing the equipment and conductors to be deployed and recovered independently of each other and to be flushed with dielectric oil (99) pumped down the conduits after re-connection.

Classes IPC  ?

• E21B 41/00 - Matériel ou accessoires non couverts par les groupes

Abrégé

An electric submersible pump assembly (ESP) (21, 120) is deployed in a production tube (20, 100) in a borehole such that the motor (26, 41, 121) of the ESP is spaced from the inner wall of the production tube, defining a conduit (36, 111) through which the pumped well fluid can flow to cool the motor. The production tube may have an enlarged diameter portion (25, 76, 101) within which the motor is positioned. Alternatively or additionally, the ESP and/or the production tube may be provided with stabilising spacers (24, 45, 140, 141) which extend between the ESP and the tube to centralise the ESP in the tube and support it against vibrational movement, the spacers defining an annular conduit (36, 111) between the motor casing and the production tube.

Classes IPC  ?

• E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
• E21B 17/10 - Protecteurs contre l'usure; Dispositifs de centrage
• F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
• H02K 5/132 - Moteurs électriques submersibles

Abrégé

A system for installing a powered device (21) in a downhole tube, comprising a power line 52 disposed along a production tube which terminates in a first power connector (10), an orientation means (13) disposed in the vicinity of the first power connector, and a powered device including a second power connector (23). The powered device is lowered down the production tube and oriented by the orientation means so that the first power connector means and second power connector means engage to connect the powered device to the power line. In another embodiment, the system comprises a power line disposed along a production tube, terminating in a first power connector, and a powered device including a second power connector, one or both of the connectors being radially displaced as the powered tool is lowered such that the connectors are aligned for engagement.

Classes IPC  ?

• E21B 17/02 - Accouplements; Joints