Corey M Hoffman

US Patent:

6568475, May 27, 2003

Filed:

Jun 30, 2000

Appl. No.:

09/608077

Inventors:

William A. Grubb - Houston TX
David M. Haugen - League City TX
Corey E. Hoffman - Magnolia TX

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 4316

US Classification:

1663051, 4174101

Abstract:

An isolation container designed for use with a downhole electric pump assembly commonly used in oil and gas drilling and production operations is disclosed. The isolation container has an annular housing with an axial inlet and outlet bore. A downhole electric pump assembly is centrally located within the pressure isolation container. The downhole electric pump assembly includes an electric pump positioned above and coupled to a motor seal section which is positioned above and coupled to a centrifugal pump, thereby providing a means to power the centrifugal pump. A blind coupling is positioned above the electric motor with a tubular member connected thereto and extending through the inlet of the isolation container. The tubular member connects to a tubing string supplying fluid from the surface. The blind coupling has a plurality of radially disposed ports to allow pressurized fluid from the surface to flow into the annulus between the downhole electric pump and the isolation container.

US Patent:

6779601, Aug 24, 2004

Filed:

Jan 15, 2003

Appl. No.:

10/346015

Inventors:

Paul J. Wilson - Houston TX
Corey E. Hoffman - Magnolia TX

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 33127

US Classification:

166187, 166118, 166120, 166122, 166387, 277331, 277334

Abstract:

An inflatable packing element for a bridge plug. The packing element has an anchor portion and a sealing cover portion, each of which is expanded in order to engage and seal a surrounding string of casing or borehole. The anchor portion has a minimum length defined by 2. 63Ã the inner diameter of the surrounding pipe or other wellbore opening. At the same time, the anchor portion has a maximum length defined by approximately 49% of the length of the expanded portion of the packing element engaging the surrounding pipe or other wellbore opening.

US Patent:

6886631, May 3, 2005

Filed:

Aug 5, 2002

Appl. No.:

10/212672

Inventors:

Paul Wilson - Houston TX, US
Kevin L. Gray - Friendswood TX, US
John D. Roberts - Spring TX, US
Corey E. Hoffman - Magnolia TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B049/08

US Classification:

16625007, 16625017, 166 53, 166187

Abstract:

Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore in real time prior to setting an inflatable element in the wellbore. The inflatable element is inflated with an inflation tool run on a cable with one or more electrically conductive wires (the cable is commonly referred to as a “wireline”). One or more sensors, internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.

US Patent:

6945330, Sep 20, 2005

Filed:

Aug 5, 2002

Appl. No.:

10/212673

Inventors:

Paul Wilson - Houston TX, US
Kevin L. Gray - Friendswood TX, US
Corey E. Hoffman - Magnolia TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B044/00
E21B041/00
E21B043/112
G01R019/00

US Classification:

166373, 166 66, 166179, 702 64

Abstract:

An apparatus, method, and system for use in operating an electric downhole tool on a non-conductive support line (slickline) by converting a battery voltage to an output voltage suitable for operating the tool. In response to receiving a trigger signal, the output voltage signal is applied to the tool. The tool is controlled by varying the output voltage signal according to a power control sequence. Accordingly, electric tools typically requiring surface intervention by an operator via an electric cable (wireline) may be operated on slickline.

US Patent:

6962204, Nov 8, 2005

Filed:

Apr 16, 2003

Appl. No.:

10/414994

Inventors:

William A. Grubb - Houston TX, US
David M. Haugen - League City TX, US
Corey E. Hoffman - Magnolia TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B043/26

US Classification:

1663051

Abstract:

An isolation container designed for use with a downhole electric pump assembly commonly used in oil and gas drilling and production operations is disclosed. The isolation container has an annular housing with an axial inlet and outlet bore. A downhole electric pump assembly is centrally located within the pressure isolation container. The downhole electric pump assembly includes an electric pump positioned above and coupled to a motor seal section which is positioned above and coupled to a centrifugal pump, thereby providing a means to power the centrifugal pump. A blind coupling is positioned above the electric motor with a tubular member connected thereto and extending through the inlet of the isolation container. The tubular member connects to a tubing string supplying fluid from the surface. The blind coupling has a plurality of radially disposed ports to allow pressurized fluid from the surface to flow into the annulus between the downhole electric pump and the isolation container.

US Patent:

7073580, Jul 11, 2006

Filed:

Sep 10, 2004

Appl. No.:

10/938335

Inventors:

Paul Wilson - Houston TX, US
Kevin L. Gray - Friendswood TX, US
John D. Roberts - Spring TX, US
Corey E. Hoffman - Magnolia TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 49/08

US Classification:

16625007, 16625017, 166 53, 166187

Abstract:

Embodiments of the present invention generally provide a method, apparatus, and system for monitoring conditions in wellbore in real time prior to setting an inflatable element in the wellbore. The inflatable element is inflated with an inflation tool run on a cable with one or more electrically conductive wires (the cable is commonly referred to as a “wireline”). One or more sensors, internal or external to the inflation tool, are monitored before setting the inflatable element to verify well conditions are compatible with the inflatable element. The sensors may be internal or external to the inflation tool.

US Patent:

7152680, Dec 26, 2006

Filed:

Aug 23, 2005

Appl. No.:

11/209899

Inventors:

Paul Wilson - Houston TX, US
Kevin L. Gray - Friendswood TX, US
Corey E. Hoffman - Magnolia TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 43/119
E21B 47/024

US Classification:

166298, 1662552, 166 551, 175 451, 7315257

Abstract:

An apparatus, method, and system for use in operating an electric downhole tool on a non-conductive support line (slickline) by converting a battery voltage to an output voltage suitable for operating the tool. In response to receiving a trigger signal, the output voltage signal is applied to the tool. The tool is controlled by varying the output voltage signal according to a power control sequence. Accordingly, electric tools typically requiring surface intervention by an operator via an electric cable (wireline) may be operated on slickline.

US Patent:

20110203795, Aug 25, 2011

Filed:

Feb 24, 2010

Appl. No.:

12/711639

Inventors:

Christopher John Murphy - Houston TX, US
Corey Eugene Hoffman - Plantersville TX, US
Larry Watters - Spring TX, US
Fred Sabins - Montgomery TX, US
Jeffrey Watters - Cypress TX, US
Paul L. Sonnier - Kingwood TX, US

International Classification:

E21B 33/13
E21B 33/12

US Classification:

166292, 166135

Abstract:

Embodiments of the present invention generally relate to a sealant for forming durable plugs in wells and method for completing or abandoning wells. In one embodiment, a method of plugging a wellbore includes mixing sealant; mixing cement; pumping the cement and sealant into the wellbore. The cement is above the sealant and the sealant cures to become viscoelastic or semisolid.