George T Armistead

US Patent:

20130112482, May 9, 2013

Filed:

Nov 6, 2012

Appl. No.:

13/669915

Inventors:

George Taylor Armistead - Katy TX, US
Henry Anthony Bergeron - Houston TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 4/04
E21B 21/00
E21B 7/24

US Classification:

175 57, 175104

Abstract:

An apparatus and process is disclosed for drilling a borehole into a subterranean formation with reverse circulation of drilling fluid. A tubular drill pipe extends into a subterranean formation. A bottom hole assembly connected to the drill pipe includes a drill bit for excavating the subterranean formation. A downhole motor is adapted for receiving electrical power from a cable extending into the subterranean formation. A downhole pump is powered by the motor and is configured for reverse circulating drilling fluid from the annular space surrounding the drill pipe to the interior space of the drill pipe. The drilling fluid is pumped upwards in the drill pipe by the downhole pump to carry excavated cuttings upwards through the interior space of the drill pipe.

US Patent:

20130068454, Mar 21, 2013

Filed:

Aug 14, 2012

Appl. No.:

13/585483

Inventors:

George T. Armistead - Katy TX, US

Assignee:

Chevron, U.S.A. Inc. - San Ramon CA

International Classification:

E21B 43/12
E21B 36/00
E21B 43/38

US Classification:

166265, 166 62, 1661055

Abstract:

A system is provided that is capable of providing heat across a produced interval during oil and gas production to minimize or reduce undesirable formation of gas hydrates in the wellbore. In one embodiment, the configuration provides a means to recycle heat generated by an electrical submersible pump. Heat from the pump may be applied downhole. One configuration is capable of providing for downhole separation of gas from produced fluids to reduce or eliminate gas transit through the pump. A heating element also may apply heat to produced fluids. In one embodiment, a system may provide for the safe containment and control of gas within the wellbore by the utilization of a safety valve.

US Patent:

20160145970, May 26, 2016

Filed:

Nov 24, 2014

Appl. No.:

14/552092

Inventors:

George Taylor Armistead - Katy TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 34/12

Abstract:

A casing check valve for providing isolation of an open hole section of a wellbore from a cased hole section of the wellbore is described herein. The casing check valve can include a housing and an actuating sleeve movably disposed within the housing between an actuated position and a normal position. The housing can include a housing body, at least one actuating sleeve coupling feature, a flapper assembly, a flapper seat, and at least one casing pipe coupling feature. The actuating sleeve can include an actuating sleeve body, at least one housing coupling feature, at least one operating tool coupling feature, and a distal extension.

US Patent:

20160130909, May 12, 2016

Filed:

Nov 10, 2014

Appl. No.:

14/536917

Inventors:

George Taylor Armistead - Katy TX, US

Assignee:

CHEVRON U.S.A. INC. - San Ramon CA

International Classification:

E21B 34/10

Abstract:

A casing valve is described herein. The casing valve can include at least one wall forming a cavity and at least one flexible sleeve disposed proximate to an inner surface of the at least one wall. The casing valve can also include at least one chamber recessed relative to the inner surface of a top end of the at least one wall, where the at least one chamber is disposed between the at least one flexible sleeve and the at least one wall. The casing valve can further include at least one hydraulic channel disposed within the at least one wall and terminating in the at least one hydraulic chamber. The casing valve can also include a first coupling feature disposed at a top end of the at least one wall, wherein the first coupling feature is configured to couple to a first casing pipe.

US Patent:

20160084052, Mar 24, 2016

Filed:

Dec 4, 2015

Appl. No.:

14/959989

Inventors:

- San Ramon CA, US
George T. Armistead - Katy TX, US

International Classification:

E21B 43/24
E21B 43/38
E21B 43/12

Abstract:

A system is provided that is capable of providing heat across a produced interval during oil and gas production to minimize or reduce undesirable formation of gas hydrates in the wellbore. In one embodiment, the configuration provides a means to recycle heat generated by an electrical submersible pump. Heat from the pump may be applied downhole. One configuration is capable of providing for downhole separation of gas from produced fluids to reduce or eliminate gas transit through the pump. A heating element also may apply heat to produced fluids. An orifice may apply heat to produced fluids. The wellbore being drilled to a depth having a subterranean formation temperature that is high enough to elevate a temperature of the production fluids to a predetermined temperature such that the temperature of the production fluids is elevated to the predetermined temperature by at least the depth of the wellbore.

US Patent:

20150053406, Feb 26, 2015

Filed:

Aug 20, 2013

Appl. No.:

13/971350

Inventors:

George Taylor Armistead - Katy TX, US
Alvaro Jose Arrazola - Houston TX, US

Assignee:

CHEVRON U.S.A. INC. - San Ramon CA

International Classification:

E21B 43/18
E21B 23/01
E21B 36/00
E21B 17/04

US Classification:

166302, 166380, 1662421, 166105, 166 57

Abstract:

A method for pre-tensing sections of concentric tubulars in a wellbore. The method can include mechanically coupling an inside tubing pipe to an inside tubing string disposed in the wellbore. The method can also include mechanically coupling a second tubing to a second tubing string disposed in the wellbore. The method can further include suspending, by the first tubing, the first tubing, the first tubing string, the second tubing string, and the second tubing. The method can also include inserting, while suspending the first tubing, the first tubing string, the second tubing string, and the second tubing by the first tubing, a first slip into the first space between the first tubing and the second tubing. The method can further include inserting the first tubing, the first tubing string, the second tubing string, the second tubing, and the first slip further into the wellbore.

US Patent:

20150013993, Jan 15, 2015

Filed:

Jul 15, 2013

Appl. No.:

13/942024

Inventors:

George Taylor Armistead - Katy TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 43/18

US Classification:

166381, 166 67

Abstract:

A method for adjusting a pressure within a wellbore. The method can include inserting a first tubing into the wellbore. The method can also include mechanically coupling a bottom coupling feature of a multiple connection bushing to the first tubing. The method can further include mechanically coupling a second tubing to a first top coupling feature of the multiple connection bushing. The method can also include mechanically coupling a third tubing to a second top coupling feature of the multiple connection bushing, where the third tubing has an inner diameter that is greater than an outer diameter of the second tubing. The method can further include inserting the multiple connection bushing, the second tubing and the third tubing into the wellbore. The method can also include adjusting the pressure within a space between the second tubing, the third tubing, and the multiple connection bushing.

US Patent:

20140238690, Aug 28, 2014

Filed:

Feb 27, 2013

Appl. No.:

13/778341

Inventors:

George Taylor Armistead - Katy TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 43/10
E21B 17/08

US Classification:

166380, 1662426

Abstract:

A casing pipe assembly can include a first casing pipe having a top coupling member and a pipe curvature, where the top coupling member has first threads in a first direction, and where the pipe curvature substantially corresponds to a wellbore curvature. The casing pipe assembly can also include a second casing pipe having a bottom coupling member and substantially the same pipe curvature, where the bottom coupling member has second threads in a second direction. The casing pipe assembly can further include a coupling device having a bottom coupling member and a top coupling member, where the bottom coupling member has third threads in the first direction that threadably couple to the first threads of the first casing pipe, and where the top coupling member has fourth threads in the second direction that threadably couple to the second threads of the second casing pipe.