Brian P Roth

US Patent:

6334486, Jan 1, 2002

Filed:

Nov 3, 2000

Appl. No.:

09/706526

Inventors:

Michael A. Carmody - Houston TX
Kevin R. Jones - Humble TX
Robert J. Coon - Houston TX
Douglas J. Murray - Humble TX
Mark E. Hopmann - Alvin TX
Steven L. Jennings - Friendswood TX
Brian A. Roth - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 3406

US Classification:

166 53, 166 66, 166 664, 166 666, 166113, 1663321, 1663344, 25112911, 251248, 251340

Abstract:

Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke systems. The downhole flow control choke mechanisms each include a downhole electronics package to provide programming or decision making capacity as well as motor actuation systems. Each choke mechanism also includes a system whereby the device can be converted to manual operation and actuated by a conventional shifting tool.

US Patent:

6450255, Sep 17, 2002

Filed:

Aug 21, 2001

Appl. No.:

09/934359

Inventors:

Michael A. Carmody - Houston TX
Kevin R. Jones - Humble TX
Robert J. Coon - Houston TX
Douglas J. Murray - Humble TX
Mark E. Hopmann - Alvin TX
Steven L. Jennings - Friendswood TX
Brian A. Roth - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 3414

US Classification:

166 53, 166 66, 166 666, 166320, 166330, 25112911, 251208

Abstract:

Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke systems. The downhole flow control choke mechanisms each include a downhole electronics package to provide programming or decision making capacity as well as motor actuation systems. Each choke mechanism also includes a system whereby the device can be converted to manual operation and actuated by a conventional shifting tool.

US Patent:

6484800, Nov 26, 2002

Filed:

Aug 21, 2001

Appl. No.:

09/934360

Inventors:

Michael A. Carmody - Houston TX
Kevin R. Jones - Humble TX
Robert J. Coon - Houston TX
Douglas J. Murray - Humble TX
Mark E. Hopmann - Alvin TX
Steven L. Jennings - Friendswood TX
Brian A. Roth - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 3406

US Classification:

166 53, 13762418, 13762533, 166 66, 166 666, 166320, 1663324, 1663344, 25112904

Abstract:

Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke systems. The downhole flow control choke mechanisms each include a downhole electronics package to provide programming or decision making capacity as well as motor actuation systems. Each choke mechanism also includes a system whereby the device can be converted to manual operation and actuated by a conventional shifting tool.

US Patent:

6612547, Sep 2, 2003

Filed:

Aug 28, 2001

Appl. No.:

09/941291

Inventors:

Michael A. Carmody - Houston TX
Kevin R. Jones - Humble TX
Robert J. Coon - Houston TX
Douglas J. Murray - Humble TX
Mark E. Hopmann - Alvin TX
Steven L. Jennings - Friendswood TX
Brian A. Roth - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

F16K 3100

US Classification:

251343, 166 53, 166 666

Abstract:

Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke systems. The downhole flow control choke mechanisms each include a downhole electronics package to provide programming or decision making capacity as well as motor actuation systems. Each choke mechanism also includes a system whereby the device can be converted to manual operation and actuated by a conventional shifting tool.

US Patent:

6782952, Aug 31, 2004

Filed:

Oct 11, 2002

Appl. No.:

10/269662

Inventors:

Thomas W. Garay - Humble TX
Edward J. Zisk - Kingwood TX
Brian A. Roth - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 3410

US Classification:

166374, 166320, 251325

Abstract:

A downhole well valve having a variable area orifice ( ) is flow area adjusted by a sliding sleeve ( ) that is axially shifted along a tubular housing ( ) interior in a finite number of increments. A hydraulic actuator ( ) displaces a predetermined volume of hydraulic fluid with each actuator stroke. An actuator displaced volume of fluid shifts the flow control sleeve by one increment of flow area differential. An indexing mechanism ( ) associated with the sleeve provides a pressure value respective to each increment in the increment series.

US Patent:

6806675, Oct 19, 2004

Filed:

Oct 4, 2001

Appl. No.:

09/970592

Inventors:

Bing Wang - Coppell TX
Donny R. Walker - Coppell TX
Brian J. Roth - Coppell TX

Assignee:

Abbott Laboratories - Abbott Park IL

International Classification:

H02P 818

US Classification:

318685, 318696, 318254, 318432, 318434, 318700

Abstract:

A stepper motor control circuit reduces ripple current by applying both fast and slow current decays to a motor phase when current is being reduced in the motor phase while following a falling current waveform. The control circuit uses an initial fast decay to reduce a winding current and then switches to a slow decay until a winding current is sampled again. The control circuitry samples a winding current and compares the sampled current to a reference current to determine if current is to be applied or reduced using fast and/or slow decay methods. Different phase current sample circuits allow either constant current sensing or selective current sensing.

US Patent:

6810955, Nov 2, 2004

Filed:

Aug 22, 2002

Appl. No.:

10/226367

Inventors:

Brian A. Roth - Houston TX
Roger D. Hegdahl - Crosby TX
James H. Kritzler - Pearland TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 3406

US Classification:

1662425, 166316, 29456, 137155

Abstract:

A side-pocket gas lift mandrel having tapered end caps threaded onto the ends of the mandrel with metal-to-metal sealing threads. The thickness of each made up thread set is the same as the thickness of the small end of each end cap, resulting in a mandrel having the same outside diameter as if the end caps were welded on, without sacrificing any inside diameter in the small ends of the end caps, compared to a welded mandrel.

US Patent:

6983795, Jan 10, 2006

Filed:

Apr 7, 2003

Appl. No.:

10/408798

Inventors:

Stephen N. Zuklic - Kingwood TX, US
Allen W. Womble - Maurice LA, US
Wilfred Schexnayder, Jr. - Houston TX, US
Gary Corbett - Willis TX, US
Richard Y. Xu - Tomball TX, US
David Rothers - The Woodlands TX, US
Brian Roth - Houston TX, US
Russell T. Louviere - Arnaudville LA, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 43/08

US Classification:

166 51, 166278, 166227

Abstract:

A gravel packing system featuring pressure actuated sliding sleeve valves mounted to an exterior annulus around a blanking pipe for screen sections is disclosed. An internal sliding sleeve valve is provided for subsequent closure of access through the screens. The presence of the annulus between the blanking pipe and the screen permits a backup access through perforating the blanking pipe while not damaging the screen. The sliding sleeve valves that are mounted internally and externally on the blanking pipe are removable apart from the screen section that already has gravel packed around it, if they fail to operate and need repair.