Jerry G Walker

US Patent:

6371219, Apr 16, 2002

Filed:

May 31, 2000

Appl. No.:

09/584916

Inventors:

William R. Collins - Burleson TX
David J. Leidel - Arlington TX
Jerry L. Walker - Fort Worth TX
Nathan Clark - Mansfield TX
James M. Barker - Mansfield TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 2500

US Classification:

175 2, 175 453, 166 55, 102311

Abstract:

A shaped charge is provided which includes features enhancing its manufacturability. In a described embodiment, an oilwell perforator is provided which includes a case and a liner, at least one of which is a molding. The molding has a metal loaded polymer matrix.

US Patent:

6470804, Oct 29, 2002

Filed:

Feb 14, 2000

Appl. No.:

09/504332

Inventors:

David J. Leidel - Arlington TX
Jerry L. Walker - Fort Worth TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

F42B 102

US Classification:

102306, 102307, 102476

Abstract:

A shaped charge with enhanced performance is provided. In a disclosed embodiment, an oilwell perforator includes a liner which is formed of a metal powder. The metal powder has particles thereof which are coated with metal. The metal powder may be tungsten, and the particles may be coated with metals such as copper, lead, molybdenum, tin, nickel or silver. The resulting liner content by weight may be between approximately 95 and 100% tungsten.

US Patent:

6497285, Dec 24, 2002

Filed:

Mar 21, 2001

Appl. No.:

09/813738

Inventors:

Jerry L. Walker - Fort Worth TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 43117

US Classification:

166297, 166 552, 175 46

Abstract:

A shaped charge perforating apparatus ( ) for perforating a subterranean well is disclosed. The shaped charge perforating apparatus ( ) comprises a support member ( ) having a plurality of shaped charge mounting locations each having shaped charge ( ) positioned therein. Each of the shaped charges ( ) has an initiation end and a discharge end. The initiation end of each shaped charge ( ) is coupled to a detonator cord ( ) The shaped charges ( ) are enclosed in a carrier ( ) having a plurality of recesses ( ) spaced on an exterior surface thereof and having contoured bottom surfaces ( ). Each of the recesses ( ) is longitudinally and radially aligned with the discharge end of one of the shaped charges ( ).

US Patent:

6748843, Jun 15, 2004

Filed:

Jun 26, 1999

Appl. No.:

09/342482

Inventors:

James Barker - Mansfield TX
Jerry Walker - Fort Worth TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

E21B 43119

US Classification:

89 115, 177 455

Abstract:

A unique phasing pattern is provided that maximizes the effective perforation geometry of a wellbore. The improvement overcomes the problems associated with multi-phase guns of the past that failed to account for the fact that the gun rested on the low side of the casing. In one embodiment of the present invention, the phasing is arranged so that there is a zero phase tunnel formed. The zero phase tunnel is located at approximately the location where the gun rests against the low side of the well. Further, tunnels are formed by shape charges at plus and minus forty-five degrees and at plus and minus ninety degrees. This can also be referred to as a penta-phase. In another embodiment of the invention, charges can also be placed to allow for a plus and minus one hundred and thirty-five degrees pattern in addition to the penta-phase pattern described above. This expanded pattern can also be referred to as a hepta-phase pattern. By improving the phasing pattern of the perforation gun, valuable hydrocarbon fluids will encounter less resistance to flow into the well.

US Patent:

6758124, Jul 6, 2004

Filed:

Mar 14, 2002

Appl. No.:

10/097342

Inventors:

James Barker - Mansfield TX
Jerry Walker - Fort Worth TX

Assignee:

Halliburton Energy Services, Inc. - Carrollton TX

International Classification:

F42B 102

US Classification:

89 115, 102310, 102312, 175 451, 175 455, 175 46

Abstract:

A unique phasing pattern is provided that maximizes the effective perforation geometry of a wellbore. The improvement overcomes the problems associated with multi-phase guns of the past that failed to account for the fact that the gun rested on the low side of the casing. In one embodiment of the present invention, the phasing is arranged so that there is a zero phase tunnel formed. The zero phase tunnel is located at approximately the location where the gun rests against the low side of the well. Further, tunnels are formed by shape charges at plus and minus forty-five degrees and at plus and minus ninety degrees. This can also be referred to as a penta-phase. In another embodiment of the invention, charges can also be placed to allow for a plus and minus one hundred and thirty-five degrees pattern in addition to the penta-phase pattern described above. This expanded pattern can also be referred to as a hepta-phase pattern. By improving the phasing pattern of the perforation gun, valuable hydrocarbon fluids will encounter less resistance to flow into the well.

US Patent:

7430965, Oct 7, 2008

Filed:

Oct 8, 2004

Appl. No.:

10/961703

Inventors:

Jerry L. Walker - Fort Worth TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

F42B 1/02
E21B 43/116

US Classification:

102310, 102313, 102321, 89 115, 175 46, 175 455

Abstract:

A perforating apparatus () includes a plurality of shaped charges () each having an initiation end and a discharge end. A detonating cord () is operably coupled to the initiation ends of the shaped charges (). A carrier () contains the shaped charges (). The carrier () includes at least one discharge location corresponding to the discharge ends of the shaped charges () when the perforating apparatus () is in its operable position. The discharge location has first and second material layers () wherein the second material layer () exhibits resilient recovery such that an opening created by a jet formed from detonating one of the shaped charges () in the second material layer () is smaller than an opening created by the jet in the first material layer (), thereby retaining debris in the perforating apparatus () with the second material layer ().

US Patent:

7621342, Nov 24, 2009

Filed:

Aug 29, 2008

Appl. No.:

12/201287

Inventors:

Jerry L. Walker - Azle TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 43/116
F42B 1/02

US Classification:

175 455, 175 46, 102310, 102313, 102321, 89 115

Abstract:

A perforating apparatus () includes a plurality of shaped charges () each having an initiation end and a discharge end. A detonating cord () is operably coupled to the initiation ends of the shaped charges (). A carrier () contains the shaped charges (). The carrier () includes at least one discharge location corresponding to the discharge ends of the shaped charges () when the perforating apparatus () is in its operable position. The discharge location has first and second material layers () wherein the second material layer () exhibits resilient recovery such that an opening created by a jet formed from detonating one of the shaped charges () in the second material layer () is smaller than an opening created by the jet in the first material layer (), thereby retaining debris in the perforating apparatus () with the second material layer ().

US Patent:

7828051, Nov 9, 2010

Filed:

Aug 6, 2007

Appl. No.:

11/890371

Inventors:

Jerry L. Walker - Fort Worth TX, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 43/116

US Classification:

166 551, 1023211, 175 46

Abstract:

An improved perforating gun having a tubular housing, a tubular carrier and a charge carried by the tubular carrier. The tubular carrier comprises an inside diameter, an outside diameter and an opening disposed between the inside diameter and the outside diameter. The charge comprises a forward end positioned in the opening between the inside diameter and the outside diameter. The tubular carrier increases a collapsible-pressure rating for the housing and positions the charge closer to the formation.