Dan E Pratt

US Patent:

6354219, Mar 12, 2002

Filed:

Apr 21, 1999

Appl. No.:

09/295685

Inventors:

Dan W. Pratt - Fort Worth TX
David S. Wesson - DeSoto TX
John K. Rouse - Weatherford TX

Assignee:

Owen Oil Tools, Inc. - Fort Worth TX

International Classification:

F42B 102

US Classification:

102307, 102306, 102476

Abstract:

A liner for a explosive shaped charge, such as those used in perforating operations in oil and gas wells, is formed from a powdered metal mixture that includes molybdenum. The molybdenum allows a higher density liner to be formed to create denser jets for achieving deeper penetration, but without the negative effects that often accompany the use of higher density materials. The molybdenum may be used in the amount of 0. 5% to 25% by weight of the metal mixture, with tungsten and other constituents forming the remainder of the mixture.

US Patent:

6505559, Jan 14, 2003

Filed:

Sep 14, 2000

Appl. No.:

09/661359

Inventors:

Johnny Joslin - Godley TX
David S. Wesson - Fort Worth TX
Dan W. Pratt - Fort Worth TX

Assignee:

Owen Oil Tools, Inc. - Fort Worth TX

International Classification:

F42B 1028

US Classification:

102310, 102307, 102312, 102313, 86 50

Abstract:

A tubing and casing cutter is shown which can be assembled in the field from a plurality of pressed segmented pellets of free standing explosive material. The segmented pellets have a liner glued to at least one exposed face thereof. The pellets are glued to a backup plate with two mirror image plates being stacked to form a plate assembly. A plurality of plate assemblies are stacked within a surrounding container to form the cutter. The pressed pellets can also be assembled within a cup-shaped container to form a shaped charge.

US Patent:

6655291, Dec 2, 2003

Filed:

Feb 26, 2002

Appl. No.:

10/083721

Inventors:

Dan W. Pratt - Fort Worth TX
David S. Wesson - DeSoto TX
John K. Rouse - Weatherford TX

Assignee:

Owen Oil Tools LP - Houston TX

International Classification:

F42B 102

US Classification:

102307, 102476

Abstract:

A liner for a explosive shaped charge, such as those used in perforating operations in oil and gas wells, is formed from a powdered metal mixture that includes molybdenum. The molybdenum allows a higher density liner to be formed to create denser jets for achieving deeper penetration, but without the negative effect that often accompany the use of higher density materials. The molybdenum may be used in the amount of 0. 5% to 25% by weight of the metal mixture, with tungsten and other constituents forming the remainder of the mixture.

US Patent:

7610969, Nov 3, 2009

Filed:

May 24, 2007

Appl. No.:

11/753200

Inventors:

Timothy Edward LaGrange - Rainbow TX, US
Dan W. Pratt - Fort Worth TX, US
Jeffrey Michael West - Benbrook TX, US
Lesley Alan Weisner - Granbury TX, US
Christopher Hoelscher - Arlington TX, US

Assignee:

Owen Oil Tools LP - Houston TX

International Classification:

E21B 43/117

US Classification:

175 46, 166297, 166 55, 166 551

Abstract:

A carrier tube for use in a wellbore perforating gun has inner and outer layers selected from materials of different, comparative physical properties. The inner layer has a higher compressive strength, and the outer layer has a higher yield strength. The inner layer enables the tube to withstand wellbore compressive pressures, which may, depending upon the material selected, include relatively high pressures, while the outer layer contains any fragments of the inner layer that result upon detonation of the gun. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

US Patent:

7621332, Nov 24, 2009

Filed:

Oct 18, 2005

Appl. No.:

11/252958

Inventors:

Joseph Haney - Dalton Gardens ID, US
Dan Pratt - Fort Worth TX, US

Assignee:

Owen Oil Tools LP - Houston TX

International Classification:

E21B 43/117
E21B 43/263

US Classification:

166298, 1663081, 102320

Abstract:

A device for perforating and fracturing a formation in a single trip includes shaped charges and a volume of a gas generator. When activated by detonation of the shaped charges, the gas generator forms a high-pressure gas, which includes steam, that expands to stress and fracture the formation. Suitable gas generating materials include hydrates and hydroxides. Other materials that can be employed with the gas generator include oxidizers and material such as metals that increase the available heat for the activation of the gas generator.

US Patent:

7712416, May 11, 2010

Filed:

Jan 21, 2009

Appl. No.:

12/357303

Inventors:

Dan W. Pratt - Fort Worth TX, US
Mammohan Singh Chawla - College Park MD, US

Assignee:

Owen Oil Tools LP - Houston TX

International Classification:

F42B 1/024
F42B 1/028
F42B 1/032

US Classification:

102307, 102476

Abstract:

A shaped charge and a method of using such to provide for large and effective perforations in oil bearing sandy formations while causing minimal disturbance to the formation porosity is described. This shaped charge uses a low-density liner having a filler material that is enclosed by outer walls made, preferably, of plastic or polyester. The filler material is preferably a powdered metal or a granulated substance, which is left largely unconsolidated. The preferred filler material is aluminum powder, or aluminum particles, that are coated with an oxidizing substance, such as TEFLON, permitting a secondary detonation reaction inside the formation following jet penetration. The filled liner is also provided with a metal cap to aid penetration of the gun scallops, the surrounding borehole casing and the cement sheath. The metal cap forms the leading portion of the jet, during detonation. The remaining portion of the jet is formed from the low-density filler material, thereby resulting in a more particulated jet.

US Patent:

7913761, Mar 29, 2011

Filed:

Jan 20, 2009

Appl. No.:

12/356362

Inventors:

Dan Pratt - Benbrook TX, US
Joseph Haney - Bayview ID, US
Thomas C. Montanez - Cleburne TX, US
Matthew Clay - Fort Worth TX, US

Assignee:

Owen Oil Tools LP - Houston TX

International Classification:

E21B 43/11

US Classification:

166297, 175 46

Abstract:

A method for perforating a subterranean formation includes positioning a shaped charge and a reactant composite material in a carrier; positioning the carrier in the wellbore; detonating the shaped charge; and disintegrating the reactant composite material using a shock generated by the detonated shaped charge. The method may also include initiating a first deflagration by using carbon and heat resulting from the detonation of the shaped charge and an oxygen component of the disintegrated reactant composite material. A system for performing the method may include a carrier, a shaped charge positioned in the carrier; and a reactant composite material positioned in the carrier. The reactant composite material may be configured to disintegrate upon detonation of the shaped charge.

US Patent:

8033332, Oct 11, 2011

Filed:

Nov 23, 2009

Appl. No.:

12/624195

Inventors:

Joseph Haney - Bayview ID, US
Dan W. Pratt - Benbrook TX, US

Assignee:

Owen Oil Tools, LP - Houston TX

International Classification:

E21B 43/117
E21B 43/263

US Classification:

166298, 1663081

Abstract:

A device for perforating and fracturing a formation in a single trip includes shaped charges and a volume of a gas generator. When activated by detonation of the shaped charges, the gas generator forms a high-pressure gas, which includes steam, that expands to stress and fracture the formation. Suitable gas generating materials include hydrates and hydroxides. Other materials that can be employed with the gas generator include oxidizers and material such as metals that increase the available heat for the activation of the gas generator.

Address:

PO Box 126437, Fort Worth, TX 76126

Phone:

8175510540

VIN:

5FNRL5H64CB075164

Make:

HONDA

Model:

ODYSSEY

Year:

2012