Khanh V Duong

7367392, May 6, 2008

Nov 30, 2004

10/904809

Khanh Duong - Houston TX, US
Jean Pierre Masson - Richmond TX, US
Fernando Garcia-Osuna - Sugar Land TX, US
Harold Pfutzner - Richmond TX, US
Alain Dumont - Houston TX, US
Tetsuya Tanaka - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 43/00
E21B 28/00
E21B 27/00

166249, 166169, 1661772

Wellbore apparatus including an elongated tubular adapted for disposal within the wellbore. The tubular having an elongated recess formed on its exterior surface along the longitudinal axis. The recess is adapted to accept and house a component therein. A shield disposed within the recess and adapted to slide to a selected position therein, covering a housed component. The sliding shield and housed component are retained within the recess by a retainer system using minimal fasteners.

7367394, May 6, 2008

Dec 19, 2005

11/313004

Steven G. Villareal - Houston TX, US
Reinhart Ciglenec - Katy TX, US
Michael J. Stucker - Sugar Land TX, US
Khanh Duong - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 49/08

166264, 166100, 175 59

A sampling while drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a drill collar, at least one sample chamber, at least one flowline and at least one cover. The drill collar is operatively connectable to a drill string of the sampling while drilling tool. The drill collar has at least one opening extending through an outer surface thereof and into a cavity. The drill collar has a passage therein for conducting mud therethrough. The sample chamber is positionable in the cavity of the drill collar. The flowline in the drill collar, the at least one flowline operatively connectable to the sample chamber for passing a downhole fluid thereto. The cover is positionable about the at least one opening of the drill collar whereby the sample chamber is removably secured therein.

8056625, Nov 15, 2011

Jul 2, 2009

12/496950

Steven G. Villareal - Houston TX, US
Reinhart Ciglenec - Katy TX, US
Michael J. Stucker - Sugar Land TX, US
Khanh Duong - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 49/08

166264, 175 59

An apparatus comprising a fluid communication device configured to extend from a drill string and establish fluid communication with a subterranean formation penetrated by a wellbore in which the drill string is positioned, wherein the drill string comprises a passage configured to conduct drilling mud and an opening extending through an outer surface thereof and into a cavity. A sample chamber is coupled within the cavity and is in selectable fluid communication with the formation via the fluid communication device.

8118097, Feb 21, 2012

Jul 2, 2009

12/496956

Steven G. Villareal - Houston TX, US
Reinhart Ciglenec - Katy TX, US
Michael J. Stucker - Sugar Land TX, US
Khanh Duong - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 49/08

166264, 175 59

An apparatus comprising a fluid communication device configured to extend from a drill string and establish fluid communication with a subterranean formation penetrated by a wellbore in which the drill string is positioned, wherein the drill string comprises a passage configured to conduct drilling mud and an opening extending through an outer surface thereof and into a cavity. A sample chamber is coupled within the cavity and is in selectable fluid communication with the formation via the fluid communication device. A retainer is configured to absorb axial loading of the sample chamber within the cavity.

8336622, Dec 25, 2012

May 13, 2011

13/107178

Steven G. Villareal - Houston TX, US
Reinhart Ciglenec - Katy TX, US
Michael J. Stucker - Sugar Land TX, US
Khanh Duong - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 49/08

166264, 175 59

An apparatus comprising a fluid communication device configured to extend from a drill string and establish fluid communication with a subterranean formation penetrated by a wellbore in which the drill string is positioned, wherein the drill string comprises a passage configured to conduct drilling mud and an opening extending through an outer surface thereof and into a cavity. A sample chamber is coupled within the cavity and is in selectable fluid communication with the formation via the fluid communication device.

8631878, Jan 21, 2014

Jan 21, 2010

12/691327

Khanh A. Duong - Sugar Land TX, US

Vetco Gray Inc. - Houston TX

E21B 33/12

166387, 166180, 166196, 277327, 277522

A ring like seal assembly for a wellhead assembly that seals between a pair of coaxial tubulars. The seal assembly includes a spring member for exerting an axial force on the seal. The spring member projects from an end of the seal assembly substantially parallel to the axis of the seal assembly and is compressed when installing the seal assembly between the tubulars. Compressing the spring member maintains an axial force on the seal assembly to keep the seal assembly radially deformed so that it can maintain sealing contact with both coaxial tubulars.

8636064, Jan 28, 2014

Dec 3, 2012

13/692626

Reinhart Ciglenec - Katy TX, US
Michael J. Stucker - Sugar Land TX, US
Khanh Duong - Houston TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 49/08

166264, 175 59

In one embodiment, a sampling while drilling tool includes a drill collar having a first end, a second end, an outer wall extending between the first and second ends, and at least one opening extending through the outer wall to a cavity within the drill collar. The sampling while drilling tool also includes a sample chamber positionable in the cavity through the opening in the outer wall and a passage for conducting a drilling fluid through the drill collar.

20080087470, Apr 17, 2008

Nov 20, 2007

11/942796

STEVEN VILLAREAL - HOUSTON TX, US
JULIAN POP - HOUSTON TX, US
KENT HARMS - RICHMOND TX, US
VICTOR BOLZE - HOUSTON TX, US
REINHART CIGLENEC - KATY TX, US
MICHAEL STUCKER - SUGAR LAND TX, US
KHANH DUONG - SUGAR LAND TX, US

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

E21B 49/08

175050000, 175059000

A sample module for a sampling while drilling tool includes a sample fluid flowline operatively connectable between a sample chamber and an inlet, for passing a downhole fluid. A primary piston divides the sample chamber into a sample volume and a buffer volume and includes a first face in fluid communication with the sample volume and a second face in fluid communication with the buffer volume. A secondary piston includes a first face in fluid communication with the buffer volume having buffer fluid disposed therein and a second face.