Robert M Crow

US Patent:

7252149, Aug 7, 2007

Filed:

Jun 15, 2004

Appl. No.:

10/868076

Inventors:

Robert W. Crow - Irving TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 34/06

US Classification:

166373, 166285, 166323, 166320

Abstract:

A safety valve lock out system and method. In a described embodiment, a method of locking out a safety valve in a subterranean well includes the steps of: flowing a hardenable fluid into the safety valve; and preventing a closure device of the safety valve from closing with the hardenable fluid.

US Patent:

55645020, Oct 15, 1996

Filed:

Jan 30, 1995

Appl. No.:

8/381571

Inventors:

Robert W. Crow - Irving TX
John C. Gano - Carrollton TX
Nam V. Le - Lewisville TX
James R. Longbottom - Whitesboro TX
Karluf Hagen - Stavanger, NO

Assignee:

Halliburton Company - Dallas TX

International Classification:

E21B 3312

US Classification:

166386

Abstract:

A well control valve assembly prevents flow from or to completion segments further downhole from the well control valve assembly once the stimulation stimulation/shifter string has been removed from the production tubing string. The well control valve assembly features a shaped flapper plate which, when opened, conforms closely to the shape and size of the production tubing string's interior diameter. The flapper plate is biased toward a closed position by a compression spring arrangement that includes an arm which levers the plate upward toward a seating surface. The valve assembly's closure is mechanically induced and is not responsive to a sensed well condition.

US Patent:

58232656, Oct 20, 1998

Filed:

Jul 19, 1996

Appl. No.:

8/683947

Inventors:

Robert W. Crow - Irving TX
John C. Gano - Carrollton TX
Nam Van Le - Lewisville TX
James R. Longbottom - Whitesboro TX
Karluf Hagen - Stavanger TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 3406

US Classification:

166373

Abstract:

A system for selective production from, and stimulation of, subterranean production zones while improving productivity and enhancing control of the well. Portions of a production tubing string and an internal stimulation/shifter string are assembled and run together as completion segments. Consecutive completion segments, with each segment including packers that surround sleeves and terminate at the upper end in a well control valve, are run into the cased wellbore so that the acid flow ports operated by sleeve valve assemblies are placed proximate the perforations of prospective production zones. The production zones are then stimulated as the stimulation/shifter string is moved progressively outward placing acid at each consecutive zone. The stimulation/shifter string is then removed from the production tubing string, mechanically closing the well control valve assembly by tubing manipulation. A well control valve assembly prevents flow from or to completion segments further downhole from the well control valve assembly once the stimulation/shifter string has been removed from the production tubing string.

US Patent:

44691793, Sep 4, 1984

Filed:

Dec 17, 1981

Appl. No.:

6/331641

Inventors:

Robert W. Crow - Irving TX
Michael B. Vinzant - Carrollton TX
Kenneth L. Schwendemann - Lewisville TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

E21B 3410

US Classification:

166319

Abstract:

A well controlled by two hydraulically operated subsurface safety valves made up in the tubing string. A first valve is mechanically locked in open position and the second valve is utilized to control flow through the string. Upon malfunction of the second valve it is locked in open position and the first valve is released from its locked open position and is utilized to control flow through the string.

US Patent:

43764649, Mar 15, 1983

Filed:

Dec 8, 1980

Appl. No.:

6/214041

Inventors:

Robert W. Crow - Irving TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

E21B 3410

US Classification:

166324

Abstract:

A well safety valve, connectable in a tubing string for controlling fluid flow therethrough, in which the valve closure means is operated by a longitudinally movable, telescoping tubular operating member. High differential pressure across the closed valve closure means causes the tubular operator to telescope preventing damage to the closure means. The telescoping tubular operator extends automatically upon release of the high differential pressure. A piston rod type equalizing valve is provided which is engageable with the tubular operator in order to reduce pressure differential across the closure means prior to closure member opening forces being applied to the closure member by the tubular operator.

US Patent:

49210483, May 1, 1990

Filed:

Sep 22, 1988

Appl. No.:

7/247760

Inventors:

Robert W. Crow - Irving TX
Ricky M. Holloman - Lewisville TX
James B. Pruden - Odessa TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

E21B 4312

US Classification:

166372

Abstract:

A programmable system for controlling the operation of a plunger completion oil or gas production well to optimize production from the well. The controller operates one or more motor valves controlling the well in accordance with programmable values of off-time, on-time and exhaust-time. The controller monitors whether or not a plunger arrival signal is received on each cycle of intermitting the well and changes either the off-time or the exhaust-time for the next cycle in response thereto. In oil well mode, the off-time is decreased slightly for each cycle following a cycle in which plunger arrival occurred and increased slightly for each cycle following one in which it did not. In gas well mode, the exhaust-time is increased slightly for each cycle following a cycle in which plunger arrival occurred before on-time expired and decreased slightly for each cycle following one in which it did not.

US Patent:

63022109, Oct 16, 2001

Filed:

Nov 10, 1997

Appl. No.:

8/966554

Inventors:

Robert Wesley Crow - Irving TX
Michael Burl Vinzant - Carrollton TX
Michael Wade Meaders - Pilot Point TX
Gerald L. LeBoeuf - Harvey LA

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 3410
F16K 31363

US Classification:

166324

Abstract:

A subsurface safety valve has a tubular valve housing, a valve closure member movable between an open and a closed position, an axially shiftable flow tube for opening the valve closure member. Hydraulic pressure from the control line is used to move a piston, which in turn moves an axially shiftable opening prong through the closure member. A balance line, or second hydraulic line is also used to make the valve well insensitive. An isolation valve is placed in the flow path of the second hydraulic line. The isolation valve prevents gas migration into the balance line. It also provides volume control for the fluid displaced when the piston is moved by pressure from the control line. Further, the valve can be closed by the application of sufficient pressure through the second hydraulic line.

US Patent:

54799899, Jan 2, 1996

Filed:

Jul 12, 1994

Appl. No.:

8/274175

Inventors:

Perry C. Shy - Southlake TX
Robert W. Crow - Irving TX

Assignee:

Halliburton Company - Houston TX

International Classification:

E21B 3412

US Classification:

1663324

Abstract:

A sleeve valve assembly featuring a cylindrical housing within which a sleeve valve is axially slidable within a radially expanded section of the housing. The radially expanded section of the housing presents an inwardly extending stop shoulder at one point along its length and an annular expansion notch at another point. The sleeve valve includes a radially projecting chamfered boss about its circumference. A portion of the sleeve valve is longitudinally slotted so as to form collets. An outwardly biased C-ring is disposed about the sleeve valve within the radially expanded section. The C-ring is initially disposed to be free to travel axially along the radially expanded section between the boss and the stop shoulder. As the sleeve valve is moved toward an open position, the boss, C-ring and stop shoulder engage each other such that the sleeve valve is releasably snagged against further axial movement toward the open position. A significant axial force upon the sleeve valve is required to effect unsnagging.