Dwayne E May

US Patent:

7347270, Mar 25, 2008

Filed:

Oct 19, 2005

Appl. No.:

11/163444

Inventors:

Timothy J. McMillan - Missouri City TX, US
Dwayne E. May - Humble TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 34/10

US Classification:

1663328, 166321, 166375

Abstract:

A subsurface safety valve for controlling a fluid flow through a well conduit includes a housing having a bore and disposed within an annulus defined by the space between the well conduit and the housing, a valve closure member movable between an open position and a closed position, and adapted to restrict the fluid flow through the bore when in the closed position, a flow tube moveably disposed within the housing and adapted to shift the valve closure member between its open and closed positions, a primary piston member in operative communication with the flow tube and a secondary piston member in operative communication with the flow tube.

US Patent:

8002040, Aug 23, 2011

Filed:

Apr 23, 2008

Appl. No.:

12/108151

Inventors:

Dwayne May - Humble TX, US
David McCalvin - Missouri City TX, US
Paul Gordon Goughnour - Fresno TX, US
David James Biddick - Missouri City TX, US
Russell Alan Johnston - Alvin TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 34/00
G05D 7/01

US Classification:

1663328, 1375133, 138 45, 251212

Abstract:

A technique enables control over flow in a wellbore with a flow control system. The flow control system combines a flow reduction mechanism with a flow control device, such as a valve. The flow reduction mechanism comprises a closure member which can be selectively moved between an unactuated and actuated position, allowing relatively greater flow through the flow control device in the unactuated position. The flow reduction mechanism actuates prior to or in conjunction with the flow control device to reduce flow and thus reduce the loading forces that would otherwise act against the flow control mechanism upon closure of the flow control device.

US Patent:

8555956, Oct 15, 2013

Filed:

Dec 18, 2006

Appl. No.:

11/640637

Inventors:

Anthony F. Veneruso - Paris, FR
David McCalvin - Missouri City TX, US
Dwayne May - Humble TX, US
Fabien Cens - Massy, FR

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 34/06

US Classification:

166 667, 166 664, 166 666

Abstract:

A tool that is usable with a well includes a tool operator and a linear induction motor, which actuates the tool operator.

US Patent:

7360600, Apr 22, 2008

Filed:

Dec 21, 2005

Appl. No.:

11/306285

Inventors:

Thomas D. MacDougall - Sugar Land TX, US
Dwayne E. May - Humble TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 34/12

US Classification:

1663328, 166323, 166373, 166386

Abstract:

A subsurface safety valve comprises a tubular body adapted for placement within a wellbore and defining a fluid passageway. A valve closure member, such as a flapper valve, is carried by the tubular body and movable through a closure path between positions opening and closing the fluid passageway. An actuator, such as a biasing spring, urges the valve closure member to its closing position. A flow tube is axially-movable within the tubular body between a first position preventing the actuator from urging the valve closure member to its closing position and a second position permitting the actuator to urge the valve closure member to its closing position. A latch assembly is provided for preventing movement of the valve closure member from its opening position to its closing position until the flow tube has been urged clear of the closure path. Aspects of the safety valve are employed by a related method and system.

US Patent:

20090242206, Oct 1, 2009

Filed:

Mar 27, 2008

Appl. No.:

12/056727

Inventors:

Paul Gordon Goughnour - Fresno TX, US
David James Biddick - Missouri City TX, US
Dwayne May - Humble TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

E21B 34/06

US Classification:

1663328

Abstract:

A system for completing a well bore, comprises, a string having a housing, a valve having a valve seat positioned within the housing, the valve seat having an inner channel, a flapper pivotally coupled to the valve seat in which the flapper is configured to move from a first open position to a second closed position such that the inner channel is at least partially obstructed. An energy dampening device is coupled to the valve seat, such that the energy dampening device is configured to at least partially absorb an impact of the flapper on the valve seat.

US Patent:

20110253392, Oct 20, 2011

Filed:

Jun 28, 2011

Appl. No.:

13/170366

Inventors:

Dwayne May - Humble TX, US
David McCalvin - Missouri City TX, US
Paul Gordon Goughnour - Fresno TX, US
David James Biddick - Missouri City TX, US
Russell Alan Johnston - Alvin TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - SUGAR LAND TX

International Classification:

E21B 34/10

US Classification:

166386, 1663323, 1663328, 1663321

Abstract:

A technique enables control over flow in a wellbore with a flow control system. The flow control system combines a flow reduction mechanism with a flow control device, such as a valve. The flow reduction mechanism comprises a closure member which can be selectively moved between an unactuated and actuated position, allowing relatively greater flow through the flow control device in the unactuated position. The flow reduction mechanism actuates prior to or in conjunction with the flow control device to reduce flow and thus reduce the loading forces that would otherwise act against the flow control mechanism upon closure of the flow control device.

US Patent:

46518223, Mar 24, 1987

Filed:

Apr 23, 1986

Appl. No.:

6/855194

Inventors:

Russell A. Johnston - Houston TX
Dwayne E. May - Humble TX

Assignee:

Camco, Incorporated - Houston TX

International Classification:

E21B 3410
E21B 2303

US Classification:

1661175

Abstract:

A dump and kill valve for use in a sidepocket having a main bore, a sidepocket in communication with the main bore with ports between the sidepocket and the outside of the mandrel and a shoulder above the pocket. The valve includes a body having a no-go shoulder with an upper first and a lower second seal spaced apart and positioned on the body sealing in the pocket on opposite sides of the port for initially blocking fluid flow. One of the seals is releasably connected to the body and is movable relative to the body upwardly in response to fluid pressure for opening communication between the ports and the main bore. Latch means may be provided between the movable seal and the body for latching the movable seal after opening and the setting tool may include a releasable seal holding shoulder for preventing premature movement of the movable seal.

US Patent:

59472065, Sep 7, 1999

Filed:

Nov 25, 1997

Appl. No.:

8/977778

Inventors:

David E. McCalvin - Sugar Land TX
Gregory B. Stephenson - Broussard LA
Dwayne E. May - Humble TX

Assignee:

Camco International Inc. - Houston TX

International Classification:

E21B 3300

US Classification:

166324

Abstract:

An annulus vent valve is provided to vent gas or other production fluids from below a packer set within a well in deep-set applications. The valve may broadly include: a body member having a first end, a second end, an outer surface, a longitudinal bore adjacent the second end, and at least one flow port extending from the longitudinal bore to the outer surface; a closure member mounted within the longitudinal bore to control fluid flow therethrough; a mechanism for biasing the closure member to a normally closed position to prevent fluid flow through the longitudinal bore; a closure member actuator disposed for movement within the longitudinal bore to open and close the closure member; a mechanism for biasing the closure member actuator away from the closure member; a piston connected to the closure member actuator and having a first end and a second end; and a gas chamber disposed within the body member and in communication with the second end of the piston.