William L Bohan

US Patent:

53298110, Jul 19, 1994

Filed:

Feb 4, 1993

Appl. No.:

8/013591

Inventors:

Roger L. Schultz - Richardson TX
William L. Bohan - Garland TX

Assignee:

Halliburton Company - Houston TX

International Classification:

E21B 4706
E21B 4908
G01N 714
G01N 3328

US Classification:

73155

Abstract:

Apparatus and methods are provided for measuring a parameter of a hydrocarbon-bearing well fluid sample while the sample is still in place in the well and at downhole pressure and temperature conditions. A tool is lowered into the well to a downhole location. A well fluid sample is trapped in the tool at the downhole location. While the tool remains within the well, the volume of the well fluid sample is expanded while repeatedly measuring the pressure of the trapped well fluid sample at different volumes and thereby generating pressure versus volume data for the trapped well fluid sample. From this data, various parameters such as bubble-point pressure and compressibility of the sample can be readily obtained. The apparatus is suited for drawing and testing multiple samples in succession. After each sample is tested, it is expelled from the tool so that another sample can be taken.

US Patent:

52793630, Jan 18, 1994

Filed:

May 27, 1993

Appl. No.:

8/068068

Inventors:

Roger L. Schultz - Richardson TX
Craig L. Zitterich - Corinth TX
Harold K. Beck - Copper Canyon TX
William L. Bohan - Garland TX

Assignee:

Halliburton Company - Duncan OK

International Classification:

E21B 4312
E21B 4908

US Classification:

166 53

Abstract:

A downhole shut-in tool includes in one aspect a pilot valve which when opened places a differential pressure across a piston which in turn operably engages a shut-in valve element to close the shut-in tool. An electronic timer assembly and electric drive motor are provided for controlling the action of the pilot valve. The drive motor is controlled by a load sensor which senses that the motor has stalled when an actuator engages a movement limiting abutment. In another aspect a pilot valve is provided which can selectively communicate the pressure differential across the piston so as to repeatedly open and close the shut-in valve element. Efficient methods of drawdown and buildup testing using such an automated multiple operating shut-in tool are provided. Associated automated sampling tools are also disclosed.

US Patent:

52340570, Aug 10, 1993

Filed:

Apr 14, 1992

Appl. No.:

7/868832

Inventors:

Roger L. Schultz - Richardson TX
Craig L. Zitterich - Corinth TX
Harold K. Beck - Copper Canyon TX
William L. Bohan - Garland TX

Assignee:

Halliburton Company - Duncan OK

International Classification:

E21B 3410
E21B 3414
E21B 4312
E21B 4908

US Classification:

166319

Abstract:

A downhole shut-in tool includes in one aspect a pilot valve which when opened places a differential pressure across a piston which in turn operably engages a shut-in valve element to close the shut-in tool. An electronic timer assembly and electric drive motor are provided for controlling the action of the pilot valve. The drive motor is controlled by a load sensor which senses that the motor has stalled when an actuator engages a movement limiting abutment. In another aspect a pilot valve is provided which can selectively communicate the pressure differential across the piston so as to repeatedly open and close the shut-in valve element. Efficient methods of drawdown and buildup testing using such an automated multiple operating shut-in tool are provided. Associated automated sampling tools are also disclosed.

US Patent:

51499843, Sep 22, 1992

Filed:

Feb 20, 1991

Appl. No.:

7/658478

Inventors:

Roger L. Schultz - Richardson TX
Kevin R. Manke - Flower Mound TX
Neal G. Skinner - Lewisville TX
William L. Bohan - Garland TX
Allen R. Young - Arlington TX

Assignee:

Halliburton Company - Dallas TX

International Classification:

F03B 1302
F03B 1310
F01B 2310

US Classification:

290 54

Abstract:

A downhole electrical power supply apparatus has a high fluid pressure source zone and a low fluid pressure discharge zone each defined at least partially within the apparatus. A fluid powered engine provides rotational mechanical output and is powered by fluid flowing from the source zone through the engine to the discharge zone. An electrical powered generator converts the rotational mechanical output of the engine into electrical output.

US Patent:

53756584, Dec 27, 1994

Filed:

May 27, 1993

Appl. No.:

8/068425

Inventors:

Roger L. Schultz - Richardson TX
Craig L. Zitterich - Corinth TX
Harold K. Beck - Copper Canyon TX
William L. Bohan - Garland TX

Assignee:

Halliburton Company - Houston TX

International Classification:

E21B 3410
E21B 3414
E21B 4312
E21B 4908

US Classification:

166250

Abstract:

A downhole shut-in tool includes in one aspect a pilot valve which when opened places a differential pressure across a piston which in turn operably engages a shut-in valve element to close the shut-in tool. An electronic timer assembly and electric drive motor are provided for controlling the action of the pilot valve. The drive motor is controlled by a load sensor which senses that the motor has stalled when an actuator engages a movement limiting abutment. In another aspect a pilot value is provided which can selectively communicate the pressure differential across the piston so as to repeatedly open and close the shut-in valve element. Efficient methods of drawdown and buildup testing using such an automated multiple operating shut-in tool are provided. Associated automated sampling tools are also disclosed.

US Patent:

53320352, Jul 26, 1994

Filed:

May 27, 1993

Appl. No.:

8/069351

Inventors:

Roger L. Schultz - Richardson TX
Craig L. Zitterich - Corinth TX
Harold K. Beck - Copper Canyon TX
William L. Bohan - Garland TX

Assignee:

Halliburton Company - Houston TX

International Classification:

E21B 4706
E21B 4312
E21B 3410
E21B 4908

US Classification:

166 53

Abstract:

A downhole shut-in tool includes in one aspect a pilot valve which when opened places a differential pressure across a piston which in turn operably engages a shut-in valve element to close the shut-in tool. An electronic timer assembly and electric drive motor are provided for controlling the action of the pilot valve. The drive motor is controlled by a load sensor which senses that the motor has stalled when an actuator engages a movement limiting abutment. In another aspect a pilot valve is provided which can selectively communicate the pressure differential across the piston so as to repeatedly open and close the shut-in valve element. Efficient methods of drawdown and buildup testing using such an automated multiple operating shut-in tool are provided. Associated automated sampling tools are also disclosed.