Dennis J Read

US Patent:

6433991, Aug 13, 2002

Filed:

Feb 2, 2000

Appl. No.:

09/496448

Inventors:

Thomas M. Deaton - Houston TX
Dwayne D. Leismer - Pearland TX
Dennis M. Read - Manvel TX

Assignee:

Schlumberger Technology Corp. - Sugar Land TX

International Classification:

H02H 4700

US Classification:

361191, 166 651

Abstract:

An actuator assembly includes an operating actuator and a holding actuator that are engageable with an operator member of a device. The operating actuation is cycled between on and off states to move the operator member in incremental steps, and the holding actuator is maintained in an active state to maintain or latch the current position of the operator member. Each of the operating and holding actuators may include one of the following: a solenoid actuator; and an actuator including one or more expandable elements, such as a piezoelectric element, a magnetostrictive element, and a heat-expandable element.

US Patent:

6715557, Apr 6, 2004

Filed:

Mar 14, 2002

Appl. No.:

10/097477

Inventors:

Rodney J. Wetzel - Katy TX
Stephen Meschall - Andar, BR
Dennis M. Read - Manvel TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 3414

US Classification:

166373, 166386, 166322, 1663323

Abstract:

A tool string for deployment in a wellbore includes an upper string and a lower string. The upper string includes a valve actuator, and the lower string includes a valve. The lower string is adapted to receive the upper string, and the valve actuator controls the operation of the valve once the upper string is received by the lower string.

US Patent:

6772842, Aug 10, 2004

Filed:

Sep 5, 2002

Appl. No.:

10/235078

Inventors:

Dennis M. Read - Manvel TX
Alfred Hernandez - Pearland TX
Juan A. Campos - Houston TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 3410

US Classification:

1663328, 166373, 251359

Abstract:

A flapper valve having a curved flapper and a seat, the flapper and seat each having complementary undulating and tapered perimeters, with sealing surfaces designed to maintain seal integrity under higher pressure, for a given outer diameter to inner diameter ratio, compared to prior art flapper valves.

US Patent:

20020166667, Nov 14, 2002

Filed:

May 9, 2001

Appl. No.:

09/851642

Inventors:

Dinesh Patel - Sugar Land TX, US
Dennis Read - Manvel TX, US
Ricardo Martinez - Houston TX, US

International Classification:

E21B034/06
E21B023/04

US Classification:

166/373000, 166/215000, 166/217000, 166/383000

Abstract:

Embodiments of the present invention disclose apparatus and methods that can be used to mechanically actuate a downhole tool with an expandable shifting tool. One embodiment of the invention is an expandable shifting tool comprising a housing having an outer diameter and a plurality of radially extendable elements. The radially extendable elements are longitudinally separated from each other and each extendable element is at least partially contained within the housing. The extendable elements are capable of moving between an extended position and a retracted position and are biased towards the extended position.

US Patent:

20040094310, May 20, 2004

Filed:

Sep 12, 2003

Appl. No.:

10/661900

Inventors:

Dennis Read - Manvel TX, US
Clay Milligan - Missouri City TX, US

International Classification:

E21B023/00

US Classification:

166/381000

Abstract:

The present invention provides for an apparatus and method of use for a hydraulic shifting tool to be used in a sealed volume in a subsurface well completion to actuate a downhole device, without a fluid return to surface or the well annulus.

US Patent:

20040144546, Jul 29, 2004

Filed:

Jan 14, 2004

Appl. No.:

10/757611

Inventors:

Dennis Read - Manvel TX, US

International Classification:

E21B034/06

US Classification:

166/373000, 166/319000

Abstract:

A method and apparatus for actuating a downhole tool is provided. The apparatus of the present invention includes a remotely energized actuator device that facilitates storage of energy needed to actuate a downhole tool after the device is placed downhole. By energizing the tool downhole, surface exposure to potential safety hazards is reduced.

US Patent:

20050056429, Mar 17, 2005

Filed:

Jul 15, 2004

Appl. No.:

10/710492

Inventors:

Michael Du - Pearland TX, US
Dennis Read - Manvel TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

E21B037/08
E21B021/00
E21B031/08

US Classification:

166311000, 166099000, 166167000

Abstract:

The system including a well tool having a housing forming a protection fluid chamber in fluid communication with a discharge port, a protection fluid disposed within the protection fluid chamber, and a moveable mechanism in functional connection with the protection fluid chamber in a manner to expel a portion of the protection fluid when the moveable mechanism moves.

US Patent:

20050224226, Oct 13, 2005

Filed:

Apr 11, 2005

Appl. No.:

10/907660

Inventors:

Dennis Read - Manvel TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

E21B033/13

US Classification:

166217000

Abstract:

A completion assembly having a force transfer apparatus to assist in the release of a loaded member.