Abstract: Master valve and cable hanger system for deploying and making electrical connection to an electric submersible pump. A landing for the cable hanger (50) is in the through bore below the valve closure element. The landing has a seal area and a bore transverse to the through bore penetrating into the seal area for allowing electric connection to the pump. The cable hanger has a seal section having longitudinally spaced apart seals engageable with an interior of the seal area, electrical contacts disposed between the seals, and a lockdown profile. Flow ports are arranged to bypass seal area and seal section. A blanking plug (58) is disposed in the transverse bore to seal the seal area prior to insertion of the cable hanger.

Abstract: Master valve and cable hanger system for deploying and making electrical connection to an electric submersible pump. A landing for the cable hanger (50) is in the through bore below the valve closure element. The landing has a seal area and a bore transverse to the through bore penetrating into the seal area for allowing electric connection to the pump. The cable hanger has a seal section having longitudinally spaced apart seals engageable with an interior of the seal area, electrical contacts disposed between the seals, and a lockdown profile. Flow ports are arranged to bypass seal area and seal section. A blanking plug (58) is disposed in the transverse bore to seal the seal area prior to insertion of the cable hanger.

Abstract: A method for installing an electric submersible pump (ESP) in a well includes installing a plug in the well below a well tree. An upper and lower master valve on the tree are closed. Closure elements are removed from the lower master valve and replaced with gate seats, and a replacement gate block. The replacement gate block has a seat for a cable hanger. The upper master valve is opened. The plug is removed and the ESP extended into the well on an electrical cable. A cable hanger is affixed to the cable and is seated in the seat. The cable hanger has sealing elements to engage the seat and an electrical connector. The electrical connector is oriented to enable access through a side opening in the replacement gate block.

Abstract: An electrical submersible pump (ESP) system, comprises a motor rotationally coupled to a pump. The system has at least one of (i) a rotation stop operable to stop transfer of rotation of the pump to the motor when the ESP is switched off and (ii) a flow control valve operable to stop flow through the pump in both flow directions when the ESP is switched off.

Abstract: A well pump includes a plurality of diffusers, wherein each diffuser comprises a first threaded coupling on one longitudinal end and a second threaded coupling on an opposed longitudinal end. An impeller is disposed in each diffuser. The plurality of diffusers are coupled end to end to form a pump housing, in which the first threaded coupling on one diffuser is threadedly engaged to the second threaded coupling on adjacent diffuser.

Abstract: A power generator for use in a bore, the power generator comprising at least one drivable member; and at least one generation apparatus; the generation apparatus comprising at least one generator magnet for producing a magnetic field; and at least one electrically conductive member located or locatable within the magnetic field; wherein the drivable member is drivable by fluid flowing in the bore so as to produce relative motion of the at least one magnet and the at least one electrically conductive member in order to induce a current in the at least one electrically conductive member.

Abstract: A power generator for use in a bore, the power generator comprising at least one drivable member; and at least one generation apparatus; the generation apparatus comprising at least one generator magnet for producing a magnetic field; and at least one electrically conductive member located or locatable within the magnetic field; wherein the drivable member is drivable by fluid flowing in the bore so as to produce relative motion of the at least one magnet and the at least one electrically conductive member in order to induce a current in the at least one electrically conductive member.