Geoff Downton, Steven James Hart, John David Rowatt: Hybrid rotary steerable system. Schlumberge Technology Corporation, Matthias Abrell, Brigitte L Echols, Dale V Gandier, March 13, 2007: US07188685 (38 worldwide citation)

A bottom hole assembly is rotatably adapted for drilling directional boreholes into an earthen formation. It has an upper stabilizer mounted to a collar, and a rotary steerable system. The rotary steerable system has an upper section connected to the collar, a steering section, and a drill bit arran ...

Murat Ocalan, John F Benton, Michael H Du, Jeffrey Miller, Arukumar Arumugam, Peter Julstrom, John David Rowatt, Allan D Ross, Steven Dornak, Arthur I Watson, Brigitte Finkiewicz: Submersible pumping system. Schlumberger Technology Corporation, Kevin B McGoff, Robert A Van Someren, James L Kurlca, December 30, 2008: US07469748 (10 worldwide citation)

A technique is provided for pumping fluids in a subterranean wellbore. A submersible pumping system can be deployed in a wellbore for moving desired fluids within the wellbore. The pumping system energizes the desired fluid movement by reciprocating a working fluid between expandable members.

Michael A Dowling, Jason Kamphaus, Harryson Sukianto, Alain P Dorel, John David Rowatt, Arthur I Watson: Gas well dewatering system. Schlumberger Technology Corporation, Jim D Patterson, May 15, 2012: US08177526 (5 worldwide citation)

Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric mot ...

Marc Allcorn, Jing Hayes Chow, David Milton Eslinger, Matthew R Hackworth, John David Rowatt, Thomas Allan: Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well. Schlumberger Technology Corporation, Michael L Flynn, David Hofman, Robin Nava, January 25, 2011: US07874366 (4 worldwide citation)

To perform a cleanout operation in a wellbore, a cleaning tool having a coiled tubing and an electrical pump assembly is run into the wellbore. The electrical pump assembly that is located in the wellbore is activated. In response to fluid flow generated by the electrical pump assembly, removal of d ...

John David Rowatt: Electrical submersible pumping systems having stirling coolers. Schlumberger Technology Corporation, Kevin B McGoff, Rodney V Warfford, Tim Curington, March 29, 2011: US07913498 (2 worldwide citation)

A submersible pumping system includes a submersible pump; a gauge disposed proximate the submersible pump; a Stirling cooler disposed proximate the gauge, wherein the Stirling cooler has a cold end configured to remove heat from the gauge and a hot end configured to dissipate heat; and an energy sou ...

Michael Hui Du, Arthur I Watson, David Rowatt, Chad Bremner, Arunkumar Arumugam, David Garrett, Christopher Featherby, Ramez Guindi: Pump motor protector with redundant shaft seal. Schlumberger Technology Corporation, Michael Stonebrook, August 19, 2014: US08807966 (1 worldwide citation)

An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts.

Jahir Pabon, Matthew Godfrey, John David Rowatt: Multi-stage well system and technique. SCHLUMBERGER TECHNOLOGY CORPORATION, Jeffery R Peterson, December 6, 2016: US09512695 (1 worldwide citation)

A technique that is usable with a well includes communicating an untethered object in a passageway downhole in the well and using a cross-sectional dimension of the object and an axial dimension of the object to select a seat assembly of a plurality of seat assemblies to catch the object to form an ...

Arthur I Watson, John A Booker, Kenneth Armstrong, John David Rowatt: Electric submersible pumping sensor device and method. Schlumberger Technology Corporation, Michael Stonebrook, November 1, 2016: US09482233

An electric submersible pump device has a pump and a motor. The motor can be adjacent to the pump. A support member supports the sensor and has a length so that the sensor is located a first distance downhole from a downhole distal end of the motor.

Nathan Wicks, Jahir Pabon, Francois Auzerais, John David Rowatt, Shunfeng Zheng, Rex Burgos, Robin Mallalieu, Zheng Rong Xu: Method and apparatus of distributed systems for extending reach in oilfield applications. SCHLUMBERGER TECHNOLOGY CORPORATION, Bridget M Laffey, July 11, 2017: US09702192

Apparatus and a method for delivering a rod in a cylinder including propagating a rod in a cylinder along the interior of the cylinder, and introducing a motion in an orientation orthogonal to a length of the rod, wherein the motion comprises multiple motion sources along the length of the rod, and ...

Jeffrey Thomas, John David Rowatt, Francois M Auzerais, Simone Musso, Smaine Zeroug, Kenneth Kin nam Liang, Harald Quintus Bosz, Joshua P Kinsley, Alfred J Costa, Ching Hua Tseng, Julien Prosper Marc Aknin, Jonathan Andrew Bannister: Wellbore cement simulator. SCHLUMBERGER TECHNOLOGY CORPORATION, February 5, 2019: US10197549

Methods and apparatus for analyzing the material properties and behavior of cement as it hydrates under simulated downhole conditions. A wellbore cement simulator includes a temperature and pressure controlled innermost oil-filled container; an annulus in contact with the innermost container configu ...