Stephen Elliot Hill

US Patent:

6425443, Jul 30, 2002

Filed:

Nov 20, 2000

Appl. No.:

09/716986

Inventors:

Stephen D. Hill - Pearland TX
James M. Costley - Freeport TX
David M. Eslinger - Broken Arrow OK
Mark C. Oettli - Richmond TX
Randolph J. Sheffield - Missouri City TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 2300

US Classification:

166377, 1662426, 1662427, 285900

Abstract:

A disconnect for facilitating release of a tool at a downhole, wellbore location. The disconnect utilizes an upper portion and a lower portion connected at least in part by a shear member. The disconnect uses a plurality of pressure areas to selectively expose the lower portion to balanced, counteracting axial forces. The pressure areas allow release or disconnection of the upper portion from the lower portion upon application of a predetermined tensile load without subjecting the tubing to an undesirably high tensile load.

US Patent:

6840328, Jan 11, 2005

Filed:

Nov 25, 2002

Appl. No.:

10/304047

Inventors:

L. Michael McKee - Alvin TX, US
David M. Eslinger - Broken Arrow OK, US
Stephen D. Hill - Pearland TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 3312

US Classification:

166387, 166114, 166119, 166136, 166180, 166202

Abstract:

An apparatus, system, and method useful for discouraging the extrusion of at least one deformable member of a device into a space adjacent to the deformable member when the device is disposed within a borehole and the deformable member extends from the device to the borehole wall involves at least one expandable member disposed upon the device. The expandable member is expandable into the annulus to reduce the width thereof and retractable therefrom to allow movement of the device within and out of the borehole and redeployment of the expandable member. The apparatus, system, and method are particularly suited for limiting the extrusion of packer elements.

US Patent:

7090020, Aug 15, 2006

Filed:

Sep 25, 2003

Appl. No.:

10/671275

Inventors:

Stephen D. Hill - Pearland TX, US
Robert Bucher - Houston TX, US
L. Michael McKee - Friendswood TX, US
Mark C. Oettli - Richmond TX, US
Michael G. Gay - Dickinson TX, US

Assignee:

Schlumberger Technology Corp. - Sugar Land TX

International Classification:

E21B 34/06

US Classification:

166373, 166386, 166191

Abstract:

A flow responsive dump valve mechanism for a straddle packer tool and has a valve controlled flow passage from which underflushed fluid, typically well treatment slurry, in a conveyance and fluid supplying tubing string can be dumped into a well casing. The dump valve mechanism incorporates a ratcheting power piston, an indexing mechanism and high and low load energy storage systems to accomplish open, closed and intermediate dump valve positions. The intermediate position increases the functionality of the tool by preventing accidental closure either due to the free fall of fluid through the coiled tubing or during flushing of the tool and permits the flow rate to be increased for thorough cleaning of the straddle tool and coiled tubing. For energy storage, a light compression spring provides power to cycle the indexing mechanism. Heavier load disc springs (Bellville Washers) are used to provide power for the ratcheting power piston to open the valve.

US Patent:

7308941, Dec 18, 2007

Filed:

Dec 10, 2004

Appl. No.:

11/010116

Inventors:

Radovan Rolovic - Cheltenham, GB
Stephen D. Hill - Pearland TX, US
Frank Espinosa - Richmond TX, US
John R. Lovell - Houston TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 21/00

US Classification:

166312, 166 66, 166222

Abstract:

Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invention is useful for use in wellbore cleanouts. A computer model may be used and updated based on the measured characteristic. The input of measured characteristic and the updating of the computer model may be performed in real time whilst the wellbore cleanout operation is ongoing.

US Patent:

7543648, Jun 9, 2009

Filed:

Nov 2, 2006

Appl. No.:

11/555841

Inventors:

Stephen D. Hill - Pearland TX, US
Lawrence J. Leising - Missouri City TX, US
Frank Espinosa - Richmond TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 43/08
E21B 43/10

US Classification:

166369, 166227, 166381

Abstract:

A system and method is provided for filtering in a wellbore during various well related operations while limiting the potential for plugging. A well screen is used for filtering particulates from a fluid at a wellbore location. To remove accumulated material and avoid plugging, the well screen may be flexed via pressure differentials created across the well screen. The flexing of the well screen breaks free the accumulated materials, thereby avoiding premature job failure.

US Patent:

20050113540, May 26, 2005

Filed:

Mar 11, 2003

Appl. No.:

10/507468

Inventors:

John Weaver - Lake Jackson TX, US
William Harris - Lake Jackson TX, US
Stephen Hill - Angleton TX, US
Yunwa Cheung - Lake Jackson TX, US

International Classification:

C08F032/00

US Classification:

526308000

Abstract:

A polymer comprises a repeating unit of ethylene and vinyl alcohol, characterized by a linear backbone with substantial absence of branching on the backbone. The polymer has a steady state oxygen permeability coefficient substantially independent of the humidity. In addition, a polymer comprises a repeating unit of ethylene and vinyl acetate, characterized by a linear backbone with substantial absence of branching on the backbone and a plurality of acetate groups bonded to the backbone. Some polymers comprise vinyl alcohol or acetate groups that arm separated by x-2, x-1 or x carbon atoms, and such groups are present in a ratio of 1:2:1, wherein x ranges integrally from 3 to 12.

US Patent:

20080066962, Mar 20, 2008

Filed:

Nov 6, 2007

Appl. No.:

11/935490

Inventors:

Radovan Rolovic - Cheltenham, GB
Stephen Hill - Pearland TX, US
Frank Espinosa - Richmond TX, US
John Lovell - Houston TX, US

International Classification:

E21B 49/08

US Classification:

175050000

Abstract:

Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invention is useful for use in wellbore cleanouts. A computer model may be used and updated based on the measured characteristic. The input of measured characteristic and the updating of the computer model may be performed in real time whilst the wellbore cleanout operation is ongoing.

US Patent:

20090218105, Sep 3, 2009

Filed:

Apr 7, 2009

Appl. No.:

12/419375

Inventors:

Stephen D. Hill - Pearland TX, US
Cecilia Prieto - Houston TX, US

International Classification:

E21B 23/08
E21B 17/10
E21B 17/20

US Classification:

166383, 1662411, 1662422

Abstract:

A tractor assembly for downhole hydrocarbon applications employing multiple tractors simultaneously. The assembly is hydraulically driven and may provide a substantial increase in the total load accommodated via downhole tractoring. Thus, coiled tubing operations may be run at extensive well depths. Additionally, the load accommodated by the assembly may be hydraulically balanced among the multiple tractors of the assembly through a variety of techniques. In this manner, the total accommodated load may be improved and wear on the uphole tractor of the assembly reduced.