Robert Matthew Luke

46933085, Sep 15, 1987

Dec 19, 1985

6/810635

Robert R. Luke - Houston TX
James M. Barker - Katy TX

Halliburton Company - Duncan OK

E21B 3118

166 551

In a tubing conveyed perforating gun assembly, a detonator is discharged by a weight bar dropped into the tubing string, subject to unintended sticking. The disclosed safety anchor includes a rope socket enabling the safety anchor to be lowered into the tubing string. The safety anchor has an elongate body connected below the rope socket by a shear pin. The body has a mandrel and sleeve construction cooperatively connected with a bottom located grapple cage around collet fingers enabling a fishing neck on the weight bar to be grasped and firmly held. A slip radially expands to lock the safety anchor in the tubing string, enabling the weight bar to be held against falling for safe retrieval.

40120597, Mar 15, 1977

Sep 8, 1975

5/611259

Robert R. Luke - Houston TX
Edmund A. Fisher - Houston TX

Cameron Iron Works, Inc. - Houston TX

F16L 5500

285 18

A pipe connector having tubular members whose telescopically interfitting end portions are latched against separation, wherein one of the tubular members is stretchable to preload the latch means and move a shoulder thereon in an axial direction away from the latch means, and a nut is threadedly mounted on the other tubular member to permit a shoulder thereon to be moved against the shoulder on the one member to hold the preload on the latch means.

48009580, Jan 31, 1989

Jan 20, 1988

7/146287

David M. Haugen - Houston TX
David S. Wesson - Katy TX
Robert R. Luke - Houston TX
Kevin R. George - Columbus TX

Halliburton Company - Duncan OK

E21B 43116
E21B 3410

166 551

A vent subassembly includes a vent body having an opening which is covered or uncovered dependent upon the location of a vent sleeve relative to the vent body. The vent subassembly can be connected below a packer, and the vent sleeve can be connected to a perforator so that movement of the vent sleeve is concurrently communicated to the perforator, such as for initiating the firing of the perforator. The vent sleeve is moved by an actuator subassembly, which is to be connected above the packer if the vent and actuator subassemblies are used with a packer. The actuator subassembly has a piston housing, a piston slidably disposed in the piston housing, and a connector string extending from the piston to the vent sleeve. The piston is responsive to a differential pressure existing between the annulus outside the actuator subassembly and an interior pressure within the actuator subassembly.

46290010, Dec 16, 1986

May 28, 1985

6/737958

Carl B. Miller - Houston TX
Robert R. Luke - Houston TX
Michael L. Smith - Missouri City TX
Larry L. Grigar - East Bernard TX

Halliburton Company - Duncan OK

E21B 43116

166297

In a tubing conveyed perforating gun assembly having shaped charges to perforate a well, an improved pressure sequence shaped charge detonator is included. The preferred form of device is appended to the bottom of the assembly to function as a backup detonator. First and second piston and cylinder assemblies in an elongate body provide pressure initiated arming and subsequent pressure initiated firing pin movement to achieve primer cord detonation for perforation of the well. The pressure sequence is controllable, selectively to a specified pressure to arm and thereafter to fire.

47322110, Mar 22, 1988

Aug 7, 1986

6/894101

David M. Haugen - Houston TX
David S. Wesson - Katy TX
Robert R. Luke - Houston TX
Kevin R. George - Columbus TX

Halliburton Company - Duncan OK

E21B 43116
E21B 3410

166 551

A vent subassembly includes a vent body having an opening which is covered or uncovered dependent upon the location of a vent sleeve relative to the vent body. The vent subassembly can be connected below a packer, and the vent sleeve can be connected to a perforator so that movement of the vent sleeve is concurrently communicated to the perforator, such as for initiating the firing of the perforator. The vent sleeve is moved by an actuator subassembly, which is to be connected above the packer if the vent and actuator subassemblies are used with a packer. The actuator subassembly has a piston housing, a piston slidably disposed in the piston housing, and a connector string extending from the piston to the vent sleeve. The piston is responsive to a differential pressure existing between the annulus outside the actuator subassembly and an interior pressure within the actuator subassembly.

41531124, May 8, 1979

Jul 1, 1977

5/812049

Robert R. Luke - Houston TX

Cameron Iron Works, Inc. - Houston TX

E21B 33035

166355

There is disclosed a flex joint for connecting the upper end of wellhead equipment including a blowout preventer stack with the lower end of a riser pipe which includes means for use in sensing and producing a signal representing the angle between and relative direction of the longitudinal axes of the stack and pipe.

46780440, Jul 7, 1987

Mar 31, 1986

6/846405

Robert R. Luke - Houston TX
James M. Barker - Katy TX
Michael L. Smith - Sand Springs OK
Larry L. Grigar - East Bernard TX
Carl B. Miller - Houston TX

Halliburton Company - Duncan OK

E21B 431185

175 452

In a tubing conveyed perforating gun assembly having shaped charges to perforate a well, an improved pressure sequence shaped charge detonator is included. The preferred form of device is appended to the bottom of the assembly to function as a backup detonator. First and second piston and cylinder assemblies in an elongate body provide pressure initiated arming and subsequent pressure initiated firing pin movement to achieve primer cord detonation for perforation of the well. The pressure sequence is controllable, selectively to a specified pressure to arm and thereafter to fire.

47621796, Aug 9, 1988

Aug 4, 1986

6/892814

David S. Wesson - Katy TX
Robert R. Luke - Houston TX
Flint R. George - Katy TX
David M. Haugen - Houston TX
Kevin R. George - Columbus TX

Halliburton Company - Duncan OK

E21B 43116

166297

A detonator bar has an outer housing, an inner housing connected to the outer housing by at least one first frangible member, an explosive charge disposed in the inner housing, and a firing piston with firing pin held in the inner housing by at least one retaining dog and at least one second frangible member. Operation occurs in response to a relatively small impact force between the detonator bar and a perforator or other explosive object located in a subterranean well. This relatively small impact breaks the at least one first frangible member. Thereafter, a fluid pressure existing in the subterranean well, such as a hydrostatic pressure within a tubing string on which a perforator is conveyed, is used to exert a sufficient force to break the at least one second frangible member after the at least one retaining dog has been released by downward movement of the outer housing relative to the inner housing, which relative movement occurs only after the initial impact force has broken the at least one first frangible member.