Nathan G Clark

US Patent:

6588344, Jul 8, 2003

Filed:

Mar 16, 2001

Appl. No.:

09/810966

Inventors:

Nathan G. Clark - Mansfield TX
David John Leidel - Arlington TX

Assignee:

Halliburton Energy Services, Inc. - Dallas TX

International Classification:

F42B 102

US Classification:

102307, 102306, 102476

Abstract:

A shaped charge apparatus having an improved liner for a shaped charge constructed from a combination of powdered metal and selected polymer material. Powdered heavy metal and polymer binder is compressively formed into a rigid shaped charge liner under very high pressure. The polymer binder may be in powdered form and or also be used to coat the powdered metal particles prior to compression. The compressed liner may also contain a relatively small percentage of other material to enhance lubrication or corrosion resistance.

US Patent:

8245770, Aug 21, 2012

Filed:

Nov 30, 2009

Appl. No.:

12/627964

Inventors:

Matthew Robert George Bell - Dallas TX, US
David S. Wesson - Dallas TX, US
Nathan Garret Clark - Mansfield TX, US
John Thomas Hardesty - Dallas TX, US

Assignee:

Geodynamics, Inc. - Millsap TX

International Classification:

E21B 43/117

US Classification:

166 55, 166297, 102476

Abstract:

By using reactive shaped charges to perforate failure prone formations, the present invention is able to keep formation sand in place and increase productivity. An efficient flow distribution is surprisingly produced without requiring surge flow or post-perforation stimulation. Further, using the secondary reactive effects of reactive shaped charges allows for the reduction of the risk of erosion and minimization of sand production. In a preferred embodiment, a liner capable of producing a strongly exothermic intermetallic reaction between liner components within and around the tunnel is used to achieve a high percentage of substantially clean and enlarged perforation tunnels conducive to flow or gravel packing.

US Patent:

8544563, Oct 1, 2013

Filed:

Feb 18, 2008

Appl. No.:

12/527261

Inventors:

Brian Bourne - Sevenoaks, GB
Nathan G Clark - Mansfield TX, US

Assignee:

Qinetiq Limited - London

International Classification:

E21B 43/11

US Classification:

175 46, 166297

Abstract:

An oil and gas well shaped charge perforator capable of providing an exothermic reaction after detonation is provided, having a housing, a high explosive, and a reactive liner where the high explosive is positioned between the reactive liner and the housing. The reactive liner is produced from a composition which is capable of sustaining an exothermic reaction during the formation of the cutting jet.

US Patent:

8627707, Jan 14, 2014

Filed:

Mar 2, 2009

Appl. No.:

12/395932

Inventors:

John Hardesty - Dallas TX, US
Nathan G. Clark - Mansfield TX, US
Matt R. Bell - Dallas TX, US

Assignee:

Geodynamics, Inc. - Millsap TX

International Classification:

G01N 33/22

US Classification:

73 3517, 102306

Abstract:

An improved test setup facility, referred to as a “Quick Development Cell” (QDC), which allows for rapid turnaround testing with valuable feedback to a design engineer. Because the QDC allows for quick and efficient testing at a sufficient frequency, QDC tests are compatible with production quality control. In addition to fostering improvement of the API's Section 2 type tests using stressed natural rock for benchmark experiments, the QDC tests allow for progress to be made towards the development of a flow-optimized shape charge and superior well performance.

US Patent:

20020129726, Sep 19, 2002

Filed:

Mar 16, 2001

Appl. No.:

09/810792

Inventors:

Nathan Clark - Mansfield TX, US
David Leidel - Arlington TX, US

International Classification:

F42B012/08
F42B012/02
F42B012/20

US Classification:

102/476000

Abstract:

A shaped charge apparatus having an improved liner for a shaped charge constructed from a combination of powdered heavy metal and metal binder. Powdered heavy metal and metal binder is formed into a rigid shaped charge liner under very high pressure. The metal binder may be in powdered form or may be used to coat the powdered heavy metal particles prior to formation. The liner may also contain a relatively small percentage of other material to enhance lubrication or corrosion resistance.

US Patent:

20100132945, Jun 3, 2010

Filed:

Nov 30, 2009

Appl. No.:

12/627897

Inventors:

Matthew Robert George Bell - Dallas TX, US
David S. Wesson - Dallas TX, US
Nathan Garret Clark - Mansfield TX, US
John Thomas Hardesty - Dallas TX, US

International Classification:

E21B 43/11

US Classification:

166297

Abstract:

By substantially eliminating the crushed zone surrounding a perforation tunnel and expelling debris created upon activation of a shaped charge with first and second successive explosive events, the need for surge flow associated with underbalanced perforating techniques is eliminated. The break down of the rock fabric at the tunnel tip, caused by the near-instantaneous overpressure generated within the tunnel, further creates substantially debris-free tunnels in conditions of limited or no underbalance as well as in conditions of overbalance.

US Patent:

20100132946, Jun 3, 2010

Filed:

Nov 30, 2009

Appl. No.:

12/627693

Inventors:

Matthew Robert George Bell - Dallas TX, US
David S. Wesson - Dallas TX, US
Nathan Garret Clark - Mansfield TX, US
John Thomas Hardesty - Dallas TX, US

International Classification:

E21B 43/11

US Classification:

166298

Abstract:

By removing material of low permeability from within and around a perforation tunnel and creating at least one fracture at the tip of a perforation tunnel, injection parameters and effects such as outflow rate and, in the case of multiple perforation tunnels benefiting from such cleanup, distribution of injected fluids along a wellbore are enhanced. Following detonation of a charge carrier, a second explosive event is triggered within a freshly made tunnel, thereby substantially eliminating a crushed zone and improving the geometry and quality (and length) of the tunnel. In addition, this action creates substantially debris-free tunnels and relieves the residual stress cage, resulting in perforation tunnels that are highly conducive to injection under fracturing conditions for disposal and stimulation purposes, and that promote even coverage of injected fluids across the perforated interval.

US Patent:

20100133005, Jun 3, 2010

Filed:

Nov 30, 2009

Appl. No.:

12/627930

Inventors:

Matthew Robert George Bell - Dallas TX, US
David S. Wesson - Dallas TX, US
Nathan Garret Clark - Mansfield TX, US
John Thomas Hardesty - Dallas TX, US

International Classification:

E21B 43/117

US Classification:

175 2

Abstract:

By using reactive shaped charges, a dynamic underbalance effect associated with detonation of a perforating system is enhanced without compromising shot density. Fewer shaped charges can be loaded to achieve the same or better effective shot density as a gun fully loaded with conventional shaped charges, thereby increasing the free volume within the gun while creating debris-free tunnels with fractured tips and substantially eliminating the crushed zone surrounding each perforated tunnel. Further, the strength and grade of gun steel required to construct the gun can be reduced without compromising the amount the gun swells following detonation.