John D Rowatt from Salt Lake City, UT, age 56

Us Patents

Submersible Pumping System
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US Patent:

7469748, Dec 30, 2008
Filed:

Apr 13, 2006
Appl. No.:

11/308623
Inventors:

Murat Ocalan - Houston TX, US
John F. Benton - Smithsburg MD, US
Michael H. Du - Pearland TX, US
Jeffrey Miller - Missouri City TX, US
Peter Julstrom - Sugar Land TX, US
John David Rowatt - Pearland TX, US
Allan D. Ross - Houston TX, US
Steven Dornak - Damon TX, US
Arthur I. Watson - Sugar Land TX, US
Brigitte Finkiewicz - Rosharon TX, US
Assignee:

Schlumberger Technology Corporation - Sugar Land TX
International Classification:

E21B 33/00
E21B 43/00
US Classification:

166372, 166105, 166 68, 417394, 417539
Abstract:

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.

System And Method For Protecting A Submersible Motor
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US Patent:

7741744, Jun 22, 2010
Filed:

Mar 27, 2006
Appl. No.:

11/308447
Inventors:

Arthur I. Watson - Sugar Land TX, US
Michael H. Du - Pearland TX, US
John D. Rowatt - Pearland TX, US
Assignee:

Schlumberger Technology Corporation - Sugar Land TX
International Classification:

H02K 5/132
H02K 5/10
US Classification:

310 87, 310 89, 166 68, 166108, 417414
Abstract:

A technique is provided to facilitate pumping of fluids in a well. A submersible pumping system utilizes a submersible motor to power a submersible pump. A motor protector works in cooperation with the submersible motor to protect motor fluid within the submersible motor and to reduce differential pressures between the internal motor fluid and the external well fluid. The motor protector incorporates a piston slidably sealed within an interior cavity of the motor protector for movement to reduce undue differential pressures.

Providing A Cleaning Tool Having A Coiled Tubing And An Electrical Pump Assembly For Cleaning A Well
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US Patent:

7874366, Jan 25, 2011
Filed:

Jun 28, 2007
Appl. No.:

11/770416
Inventors:

Marc Allcorn - Sugar Land TX, US
Jing Hayes Chow - Anchorage AL, US
David Milton Eslinger - Collinsville OK, US
Matthew R. Hackworth - Manvel TX, US
John David Rowatt - Pearland TX, US
Thomas Allan - Hosuton TX, US
Assignee:

Schlumberger Technology Corporation - Sugar Land TX
International Classification:

E21B 43/00
US Classification:

166311, 166105
Abstract:

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 debris from the wellbore is caused by directing fluid containing the debris into the coiled tubing for delivery to an earth surface.

Gas Well Dewatering System
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US Patent:

8177526, May 15, 2012
Filed:

Feb 18, 2009
Appl. No.:

12/388098
Inventors:

Michael A. Dowling - Houston TX, US
Jason Kamphaus - Missouri City TX, US
Harryson Sukianto - Missouri City TX, US
Alain P. Dorel - Houston TX, US
John David Rowatt - Pearland TX, US
Arthur I. Watson - Sugar Land TX, US
Assignee:

Schlumberger Technology Corporation - Sugar Land TX
International Classification:

E21B 43/00
US Classification:

417393, 417404, 417505
Abstract:

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 motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively. A switching device is connected to the hydraulic circuit and is switchable between a first position wherein fluid pressure from the hydraulic pump causes the piston pump to move in a first direction and a second position wherein fluid pressure from the hydraulic pump causes the piston pump to move in a second direction.

Motor Driven Hybrid Rotary Steerable System
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US Patent:

20030127252, Jul 10, 2003
Filed:

Dec 13, 2002
Appl. No.:

10/248054
Inventors:

Geoff Downton - Minchinhampton, GB
Steven Hart - Bath, GB
John Rowatt - Richmond TX, US
International Classification:

E21B007/08
US Classification:

175/073000, 175/076000
Abstract:

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 integral drilling motor, an upper section connected to the collar, a steering section, and a drill bit arranged for drilling the borehole attached to the steering section. The steering section is joined at a swivel with the upper section. The steering section is actively tilted about the swivel. A lower stabilizer is mounted upon one of the upper section or the steering section such that the swivel is intermediate the drill bit and the lower stabilizer.

System And Method For A Combined Submersible Motor And Protector
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US Patent:

20050109515, May 26, 2005
Filed:

Sep 29, 2004
Appl. No.:

10/711631
Inventors:

Arthur Watson - Sugar Land TX, US
Steven Dornak - Damon TX, US
Michael Miller - Bartlesville OK, US
Parveen Sayela - Houston TX, US
Cody Casey - Lawrence KS, US
Gregory Manke - Overland Park KS, US
Mark McCorry - Aberdeen, GB
John Rowatt - Richmond TX, US
Mark Allen - Bartlesville OK, US
Diego Narvaez - Missouri City TX, US
Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX
International Classification:

E21B043/00
US Classification:

166369000, 166378000, 166065100, 166105000
Abstract:

A system and method is provided for producing a hydrocarbon fluid from a subterranean environment. The system and method utilize an electric submersible pumping system having a motive unit comprising a combined submersible motor section and protector section.

Electric Submersible Pumping Sensor Device And Method
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US Patent:

20090277628, Nov 12, 2009
Filed:

May 7, 2008
Appl. No.:

12/116302
Inventors:

Arthur I. Watson - Sugar Land TX, US
John A. Booker - Missouri City TX, US
Kenneth Armstrong - Danestone, GB
John David Rowatt - Pearland TX, US
Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX
International Classification:

E21B 47/00
US Classification:

16625001, 166105
Abstract:

An electric submersible pump device having a pump; a motor, the motor being adjacent to the pump and having motor windings extending a first distance along the motor; a support member, the support member supporting the sensor and having a length so that the sensor is located the first distance downhole from a downhole distal end of the motor windings; the sensor device comprising at least one selected from the following: a temperature sensor, a flow-meter, a vibration sensor or a pressure sensor.

Apparatus And Method For Orienting A Downhole Tool
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US Patent:

6419014, Jul 16, 2002
Filed:

Jul 20, 2000
Appl. No.:

09/621277
Inventors:

Dale E. Meek - Sugar Land TX
Lawrence J. Leising - Sugar Land TX
John D. Rowatt - Richmond TX
Assignee:

Schlumberger Technology Corporation - Houston TX
International Classification:

E21B 47024
US Classification:

1662552, 175 45
Abstract:

An orienter, particularly on coiled tubing or small diameter drill pipe, includes a motor, turbine, or other device for selectively converting the rotational kinetic energy produced from fluid flow through the device to mechanical power, and applying the mechanical power to a downhole tool through a gear train for orienting the downhole tool. The orienter is utilized during directional drilling and other operations such as well intervention, fishing, and multilateral re-entry operations. The downhole tool preferably includes a steerable mud motor. In one embodiment, the direction of the borehole is controlled by azimuthal rotation of the orienter of the present invention in response to downlink commands from the surface by changing fluid flow rate through the orienter in a predefined series of steps.