Schlumberger Technology Corporation

Zilift Holdings, Limited

Ivor MacIver

Calum Crawford

Kenneth John Sears

Jamie Cochran

Edwin Coutts

Richard McCann

Andrew Henderson

Andrew Robert Charles Henderson

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.

Centrifugal well pump with threadedly coupled diffusers

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.

Safety systems for electric submersible pumps

An inline monitoring package for a submersible pumping system includes a housing having a first end for connection to a motor, a pump or a seal section of the pumping system, and a second end for connection to the motor, the pump or the seal section. The housing is disposed between any two of the pump, the motor and the seal section. A shaft transmits rotation from the motor to the pump. The housing comprises a chassis having a through bore and an end plug at each longitudinal end. The through bore has a diameter selected to enable free passage of the shaft and fluid associated with the shaft. The end plugs sealingly engage an interior wall of the housing so as to define a sealed chamber inside the housing and external to the chassis between the end plugs. At least one electronic component is disposed in the sealed chamber.

Inline monitoring package for an electric submersible pump system

A bearing for a rotary machine includes an inner sleeve providing a first bearing surface and an outer sleeve circumscribing the inner sleeve and providing a second bearing surface in opposing relation to the first bearing surface. The bearing includes at least one tolerance ring for retaining the inner sleeve on a rotor shaft of the rotary machine and another tolerance ring for retaining the outer sleeve on a stator of the rotary machine.

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Aberdeenshire, United Kingdom

Ivor MacIver