David C Hebert

Address:

2119 Gdn Ter Dr, Katy, TX 77494

Phone:

2816930776

VIN:

5TDZY64A18S007456

Make:

TOYOTA

Model:

SEQUOIA

Year:

2008

US Patent:

6664721, Dec 16, 2003

Filed:

Oct 6, 2000

Appl. No.:

09/684107

Inventors:

Keith D. Jamison - Austin TX
Donald E. Patterson - Pearland TX
Charlie Hong - Austin TX
Randolph D. Schueller - Austin TX
David F. Hebert - Austin TX
Richard L. Woodin - Austin TX

Assignee:

Extreme Devices Incorporated - Austin TX

International Classification:

H01J 102

US Classification:

313309, 313326, 313351

Abstract:

A field emitter ( ) having improved electron emission properties is provided. Electron-emitting microtip protrusions ( ) in an emitter layer ( ) are separated from a dielectric layer ( ) by an interlayer ( ) that prevents substantial mixing of the dielectric ( ) and the emitter layer ( ) during growth of the dielectric layer ( ). A conductive gate electrode layer ( ) is deposited on the dielectric layer ( ). For carbon-based emitters, aluminum is one of several suitable interlayers between the carbon layer and a silicon dioxide dielectric layer.

US Patent:

7520336, Apr 21, 2009

Filed:

Jan 16, 2007

Appl. No.:

11/654350

Inventors:

Maximiliano Mondelli - Houston TX, US
George Krieg - Youngsville LA, US
David Hebert - Scott LA, US
David Robinson - Cypress TX, US

Assignee:

BJ Services Company - Houston TX

International Classification:

E21B 34/14
E21B 23/00

US Classification:

166386, 166318, 166331

Abstract:

A downhole device used to divert fluid flow out of a work string. The downhole device may be located at any point along a work string at which it may be necessary to divert the fluid flow to the annulus. The downhole device may be activated and deactivated by inserting a single deformable dart into the work string. The device catches the dart blocking fluid flow through the work string. Increased fluid pressure activates the device, which diverts the fluid flow out of the work string into the annulus. A locating sleeve with a continuous j-track allows the device to be retained in activated position. The dart is adapted to deform under a predetermined amount of fluid pressure allowing the dart past the device and returning fluid flow through the work string. The downhole device may be activated multiple times without removing the downhole device from the wellbore.

US Patent:

7766086, Aug 3, 2010

Filed:

Jun 8, 2007

Appl. No.:

11/811301

Inventors:

Maximiliano Mondelli - Houston TX, US
George Krieg - Youngsville LA, US
David Hebert - Scott LA, US
David Robinson - Cypress TX, US

Assignee:

BJ Services Company LLC - Houston TX

International Classification:

E21B 34/10

US Classification:

166374, 166331

Abstract:

A downhole device used to divert fluid flow out of a work string into an annulus. The downhole device is activated by the movement of a plurality of pistons within the downhole device. Fluid flow through a restriction of the downhole device creates an increase in fluid pressure causing the movement of the pistons. The pistons move a flow tube between various locations within the device. In one location, the flow tube prevents fluid flow to the annulus while in another location the flow tube allows fluid flow to be diverted into the annulus. The downhole device may include a locating sleeve having a continuous j-track allowing the flow tube to be selectively retained at the various locations within the downhole device. Fluid flow through the downhole is used to cycle the device between diverting fluid flow to the annulus and forcing fluid flow down the work string.

US Patent:

7926574, Apr 19, 2011

Filed:

Mar 3, 2010

Appl. No.:

12/716990

Inventors:

Maximiliano Mondelli - Houston TX, US
George Krieg - Youngsville LA, US
David Hebert - Scott LA, US
David Robinson - Cypress TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 34/10

US Classification:

166374, 166319, 166331

Abstract:

A downhole device used to divert fluid flow out of a work string into an annulus. The downhole device is activated by the movement of a plurality of pistons within the downhole device. Fluid flow through a restriction of the downhole device creates an increase in fluid pressure causing the movement of the pistons. The pistons move a flow tube between various locations within the device. In one location, the flow tube prevents fluid flow to the annulus while in another location the flow tube allows fluid flow to be diverted into the annulus. The downhole device may include a locating sleeve having a continuous j-track allowing the flow tube to be selectively retained at the various locations within the downhole device. Fluid flow through the downhole is used to cycle the device between diverting fluid flow to the annulus and forcing fluid flow down the work string.

US Patent:

20060180312, Aug 17, 2006

Filed:

Feb 11, 2005

Appl. No.:

11/057303

Inventors:

Neal Bracksieck - Tomball TX, US
David Hebert - Scott LA, US

International Classification:

E21B 33/035
E21B 21/00

US Classification:

166312000, 166088400

Abstract:

A displacement annular swivel is disclosed consisting of a mandrel with a sleeve assembly positioned around the outside diameter of the mandrel. The sleeve assembly consists of at least one radial bushing such that the mandrel can be rotated and reciprocated within the sleeve assembly when the sleeve assembly is fixed in a stationary position. At least one sealing element is present on the sleeve assembly to radially seal against the outside diameter of the mandrel. A method for displacing drilling mud from a completed subsea wellbore is also disclosed consisting of closing a blowout preventer around the aforementioned tool connected to the work string. The tool thereby allows the work string to be rotated and reciprocated when the blowout preventer is closed. Drilling fluid can then be displaced from the wellbore by pumping a fluid such as completion brine through the work string and out the choke and kill lines.