John Richard Dennis

US Patent:

6747743, Jun 8, 2004

Filed:

Nov 8, 2001

Appl. No.:

10/008503

Inventors:

Neal G. Skinner - Lewisville TX
John R. Dennis - Bozeman MT
Michel LeBlanc - Oakton VA

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

G01B 902

US Classification:

356477

Abstract:

A fiber optic sensor system permits multiple parameters to be sensed using a single sensor. In a described embodiment, a method of sensing multiple parameters is provided in which an interferometric fiber optic sensor is connected to a variable wavelength light source. Light is transmitted from the light source through the sensor, with the light being swept over a range of wavelengths to measure relatively low frequency signals, and the light being maintained at a constant wavelength to measure relatively high frequency signals.

US Patent:

6789620, Sep 14, 2004

Filed:

Feb 15, 2002

Appl. No.:

10/076960

Inventors:

Roger L. Schultz - Aubrey TX
John R. Dennis - Bozeman MT
John M. Richardson - late of Edmund OK

Assignee:

Halliburton Energy Services, Inc. - Carrollton TX

International Classification:

E21B 4700

US Classification:

16625015, 16625001, 166 53, 702 6, 702 11, 706 15, 706929

Abstract:

Methods are provided for downhole sensing and flow control utilizing neural networks. In a described embodiment, a temporary sensor is positioned downhole with a permanent sensor. Outputs of the temporary and permanent sensors are recorded as training data sets. A neural network is trained using the training data sets. When the temporary sensor is no longer present or no longer operational in the well, the neural network is capable of determining the temporary sensors output in response to the input to the neural network of the permanent sensors output.

US Patent:

6901391, May 31, 2005

Filed:

Jan 18, 2002

Appl. No.:

10/051323

Inventors:

Roger L. Schultz - Aubrey TX, US
John R. Dennis - Bozeman MT, US
John M. Richardson - Norman OK, US

Assignee:

Halliburton Energy Services, Inc. - Duncan OK

International Classification:

G06F015/18

US Classification:

706 16, 70 25

Abstract:

A method of optimizing performance of a well system utilizes a neural network. In a described embodiment, the method includes the step of accumulating data indicative of the performance of the well system in response to variable influencing parameters. The data is used to train a neural network to model an output of the well system in response to the influencing parameters. An output of the neural network may then be input to a valuing model, e. g. , to permit optimization of a value of the well system. The optimization process yields a set of prospective influencing parameters which may be incorporated into the well system to maximize its value.

US Patent:

6957576, Oct 25, 2005

Filed:

Jul 11, 2003

Appl. No.:

10/618328

Inventors:

Neal G. Skinner - Lewisville TX, US
John R. Dennis - Bozeman MT, US
Michel Leblanc - Plano TX, US
Gregg Johnson - Fairfax VA, US
Michael D. Todd - Alexandria VA, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B047/06

US Classification:

7315251, 73716

Abstract:

A well pressure and temperature measurement system and method are provided. In a described embodiment, a sensor system includes multiple strain sensors attached to a structure which changes dimensionally in response to well pressure and temperature changes. The strain sensors may be fiber optic sensors. The structure may be tubular and the strain sensors may detect axial and hoop strains in the structure.

US Patent:

7159468, Jan 9, 2007

Filed:

Jun 15, 2004

Appl. No.:

10/868077

Inventors:

Neal G. Skinner - Lewisville TX, US
John R. Dennis - Bozeman MT, US
Donald H. Perkins - Carrollton TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

G01L 13/00

US Classification:

73736, 73705, 73716, 73720

Abstract:

A fiber optic differential pressure sensor. In a described embodiment, a differential pressure sensor system for use in a subterranean well includes a fluid property sensing housing having a flow passage formed therethrough. A differential pressure sensor has an optical fiber extending in a wall having a first side and a second side, each of the first and second sides being exposed to pressure in the flow passage.

US Patent:

7458273, Dec 2, 2008

Filed:

Nov 9, 2006

Appl. No.:

11/558372

Inventors:

Neal G. Skinner - Lewisville TX, US
John R. Dennis - Bozeman MT, US
Donald H. Perkins - Carrollton TX, US

Assignee:

Welldynamics, B.V. - Leiderdorp

International Classification:

G01L 13/02

US Classification:

73736, 73716, 73753

Abstract:

A fiber optic differential pressure sensor. In a described embodiment, a differential pressure sensor system for use in a subterranean well includes a fluid property sensing housing having a flow passage formed therethrough. A differential pressure sensor has an optical fiber extending in a wall having a first side and a second side, each of the first and second sides being exposed to pressure in the flow passage.