1
Michael Andrew Yuratich, Alan Thomas Fraser: Electric submersible pumps. Oilfield Equipment Development Center, Patterson & Sheridan L, July 5, 2011: US07971650 (9 worldwide citation)

A method of pumping wellbore fluid, comprising the steps of: installing an electric submersible pump in a wellbore; and operating the pump at more than 4,500 rpm to pump the wellbore fluid. Pumping in this manner provides a number of advantages in use in that the required high-speed motor and pump i ...


2
Michael Andrew Yuratich: Electric submersible pumps. Oilfield Equipment Development Center, Patterson & Sheridan L, March 18, 2014: US08672641 (6 worldwide citation)

An electric submersible pump contains an AC permanent magnet motor having three or more phases A, B, C and has a drive circuit for supplying varying drive signals to all the phases of the motor at the same time. Each drive signal is constituted by a cyclically smoothly varying voltage applied to the ...


3
Michael Andrew Yuratich: Electric submersible pumps. Oilfield Equipment Development Center, Patterson & Sheridan L, April 20, 2010: US07701106 (5 worldwide citation)

A downhole electric motor for a submersible pump has at least three phases and comprises a permanent magnet rotor and a stator bearing phase windings A, B and C in slots (2206) in the stator. Each phase winding A, B, C incorporates a coil extending through a respective pair of adjacent stator slots ...


4
Steven Charles Kennedy: Electrical submersible pump assembly. Oilfield Equipment Development Center, Patterson & Sheridan L, June 12, 2012: US08196657 (5 worldwide citation)

In one embodiment, a pump assembly for pumping a wellbore fluid in a wellbore includes a pump, a fluid separator, a motor for driving the pump, and a shroud disposed around the fluid separator for guiding a gas stream leaving the fluid separator, wherein the gas stream is prevented from mixing with ...


5
Andreiy Vladimirovich Sagalovskiiy, Juliiy Abelevich Aranson, Vladimir Iosifovich Sagalovskiiy, Ol ga Nikolaevna Gmyzina, Dmitriiy Aleksandrovich Shkad: Method of brushless DC motor control and its application. Oilfield Equipment Development Center, Patterson & Sheridan L, December 13, 2011: US08076898 (2 worldwide citation)

The invention relates to electric engineering, in particular to methods for controlling an ac electronic motor. The inventive control method consists in starting and rotating a rotor upon EMF signals in current-free sections of an armature winding, in converting the EMF signals into discrete logical ...


6
Clayton Bara, Phil Fouillard, Darren Part: Artificial lift system for well production. Oilfield Equipment Development Center, Patterson & Sheridan L, February 24, 2015: US08960273 (1 worldwide citation)

A method of pumping production fluid from a wellbore includes deploying a centrifugal pump into a production wellbore; and pumping hydrocarbons from the production wellbore by rotating an impeller of the centrifugal pump in the production wellbore from surface using a drive string, wherein the impel ...


7
Phil Fouillard, Darren Part, Evan Noble: Rod driven centrifugal pumping system for adverse well production. OILFIELD EQUIPMENT DEVELOPMENT CENTER, WEATHERFORD LAMB, Patterson & Sheridan, July 11, 2017: US09702232 (1 worldwide citation)

A downhole assembly of an artificial lift system includes: an adapter for connection to production tubing; a receptacle shaft; an up-thrust bearing; a centrifugal pump; and a down-thrust bearing. The receptacle shaft has a latch profile for receiving a latch fastener of a drive coupling and a torsio ...


8
SAGALOVSKIIY VLADIMIR IOSIFOVICH, SAGALOVSKIIY ANDREIY VLADIMIROVICH, GMYZINA OL GA NIKOLAEVNA: ROTOR ENCAPSULE POUR MOTEUR SUBMERSIBLE A AIMANT PERMANENT, ENCAPSULATED ROTOR FOR PERMANENT MAGNET SUBMERSIBLE MOTOR. OILFIELD EQUIPMENT DEVELOPMENT CENTER, OILFIELD EQUIPMENT DEVELOPMENT CENTER, DEETH WILLIAMS WALL, January 3, 2017: CA2783842 (1 worldwide citation)

A rotor for a submersible motor includes a shaft and a hub. The hub is: disposed around the shaft, torsionally connected to the shaft, and made from a magnetically permeable metal or alloy. The rotor further includes permanent magnets disposed around the hub; and a polymer shroud encapsulating the p ...


9
Mark Patrick Robertson, Graeme Peter Hossack: Power line communication system. Oilfield Equipment Development Center, Patterson & Sheridan L, November 26, 2013: US08593266

This invention relates to a power line communication (PLC) system wherein the power supply line supplies power and also acts as a communications supply line. A receiver is able to detect small changes in the modulated transmitted information and thereby shut down the circuit. The invention is partic ...


10
Wayne Horley, Jerry Evans, Richard Jackson: Surface pump assembly. Oilfield Equipment Development Center, Patterson & Sheridan, June 14, 2016: US09366240

A surface mounted pump assembly includes a centrifugal pump having a plurality of impellers and an electric motor adapted to drive the pump such that a thrust load from the pump is transmitted to the motor.