Stephen Drew Bonner

US Patent:

6351127, Feb 26, 2002

Filed:

Dec 1, 1999

Appl. No.:

09/452660

Inventors:

Richard A. Rosthal - Huston TX
Dean M. Homan - Sugar Land TX
Dzevat Omeragic - Sugar Land TX
Stephen D. Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Scott S. Chesser - Richmond TX
Thomas D. Barber - Houston TX

Assignee:

Schlumberger Technology Corporation - Houston TX

International Classification:

G01V 312

US Classification:

324338

Abstract:

A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising at least one sloped slot or sloped conductive element therein. The shield being adapted to surround an antenna mounted on a well tool. A method for rotating the axis of the magnetic dipole of a transmitter or receiver coil. A method for winding and shielding an electric coil such that the resultant coil emits or receives selected electromagnetic energy field components.

US Patent:

6380744, Apr 30, 2002

Filed:

Aug 17, 2001

Appl. No.:

09/932249

Inventors:

Brian Clark - Sugar Land TX
Richard A. Rosthal - Houston TX
Dean M. Homan - Sugar Land TX
Dzevat Omeragic - Sugar Land TX
Stephen D. Bonner - Sugar Land TX
Scott S. Chesser - Richmond TX
Thomas D. Barber - Houston TX

Assignee:

Schlumberger Technology Corporation - Houston TX

International Classification:

G01V 330

US Classification:

324338

Abstract:

A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising at least one sloped slot or sloped conductive element therein. The shield being adapted to surround an antenna mounted on a well tool. A method for rotating the axis of the magnetic dipole of a transmitter or receiver coil. A method for winding and shielding an electric coil such that the resultant coil emits or receives selected electromagnetic energy field components.

US Patent:

6557794, May 6, 2003

Filed:

Aug 17, 2001

Appl. No.:

09/932251

Inventors:

Richard A. Rosthal - Houston TX
Dean M. Homan - Sugar Land TX
Dzevat Omeragic - Sugar Land TX
Stephen D. Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Scott S. Chesser - Richmond TX
Thomas D. Barber - Houston TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

B65H 3916

US Classification:

2424441, 324338

Abstract:

A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising at least one sloped slot or sloped conductive element therein. The shield being adapted to surround an antenna mounted on a well tool. A method for rotating the axis of the magnetic dipole of a transmitter or receiver coil. A method for winding and shielding an electric coil such that the resultant coil emits or receives selected electromagnetic energy field components.

US Patent:

6573722, Jun 3, 2003

Filed:

Dec 15, 2000

Appl. No.:

09/737891

Inventors:

Richard A. Rosthal - Houston TX
Dean Homan - Sugar Land TX
Thomas D. Barber - Houston TX
Stephen Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Dzevat Omeragic - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 302

US Classification:

324338, 324347

Abstract:

Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique.

US Patent:

6577244, Jun 10, 2003

Filed:

May 22, 2000

Appl. No.:

09/576271

Inventors:

Brian Clark - Sugar Land TX
John Hunka - Sugar Land TX
Mark T. Frey - Sugar Land TX
David L. Smith - Stafford TX
Dhananjay Ramaswamy - Stafford TX
Anthony Collins - Houston TX
Stephen Bonner - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 300

US Classification:

3408546, 3408532, 3408544, 324339, 324369

Abstract:

Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in tool. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. Hydraulic isolation between the interior and exterior of the tubular is provided by pressure barrier means at the slotted stations. Sensors and/or sources are mounted on the run-in tool, which is adapted for transmission through a drill string to engage within the tubular in alignment with the slotted stations. A run-in tool configuration includes a modulator for real-time wireless communication with the surface and/or remote downhole tools. A tubular and run-in tool configuration also includes inductive couplers for wireless signal data transfer. A method for measuring a formation characteristic utilizing a run-in tool adapted with an interchangeable end segment for multi-mode downhole transport.

US Patent:

6624634, Sep 23, 2003

Filed:

Feb 14, 2003

Appl. No.:

10/367398

Inventors:

Richard A. Rosthal - Houston TX
Dean Homan - Sugar Land TX
Thomas D. Barber - Houston TX
Stephen Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Dzevat Omeragic - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 302

US Classification:

324338, 324347

Abstract:

Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique.

US Patent:

6680613, Jan 20, 2004

Filed:

Feb 14, 2003

Appl. No.:

10/367413

Inventors:

Richard A. Rosthal - Houston TX
Dean Homan - Sugar Land TX
Thomas D. Barber - Houston TX
Stephen Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Dzevat Omeragic - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 310

US Classification:

324339

Abstract:

Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique.

US Patent:

6710601, Mar 23, 2004

Filed:

Feb 14, 2003

Appl. No.:

10/367475

Inventors:

Richard A. Rosthal - Houston TX
Dean Homan - Sugar Land TX
Thomas D. Barber - Houston TX
Stephen Bonner - Sugar Land TX
Brian Clark - Sugar Land TX
Dzevat Omeragic - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 318

US Classification:

324343, 324339

Abstract:

Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique.