David K Truax

Address:

16606 Rose Bay Trl, Cypress, TX 77429

VIN:

1FMFU17547LA90568

Make:

FORD

Model:

EXPEDITION

Year:

2007

US Patent:

6394202, May 28, 2002

Filed:

Jun 30, 1999

Appl. No.:

09/343968

Inventors:

David K. Truax - Houston TX
Thomas Walter Oldham - The Woodlands TX
Carl Edward Penuel - Houston TX
Duane R. Van Waes - Cypress TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1046

US Classification:

175434, 175426, 175428, 175435

Abstract:

An earth-boring bit comprises a bit body bit body in which are mounted a plurality of cutting structures inserts, wherein at least a portion of the cutting structures comprise diamond-impregnated inserts having a total thermal exposure of less than 25 minutes above 1500Â F. The diamonds can be natural or synthetic diamond. The bit body itself may be diamond-impregnated, in which case it is preferred that the diamonds in the inserts make up at least 40% of the total diamond in the bit.

US Patent:

6405814, Jun 18, 2002

Filed:

Oct 20, 2000

Appl. No.:

09/693028

Inventors:

Ronald K. Eyre - Orem UT
Madapusi K. Keshavan - Sandy UT
David Truax - Houston TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1046

US Classification:

175432

Abstract:

The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed a ultra hard material layer. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.

US Patent:

6464024, Oct 15, 2002

Filed:

May 16, 2001

Appl. No.:

09/858380

Inventors:

Timothy P. Beaton - The Woodlands TX
David Truax - Houston TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1040

US Classification:

175391, 175399

Abstract:

A bi-center drill bit includes pilot and reaming blades affixed to a body at azimuthally spaced locations. The blades have PDC cutters attached at selected positions. In one aspect, the pilot blades form a section having length along the bit axis less than about 80 percent of a diameter of the section. In another aspect, selected pilot blades and corresponding reaming blades are formed into single spiral structures. In another aspect, shapes and positions of the blades and inserts are selected so that lateral forces exerted by the reaming and the pilot sections are balanced as a single structure. Lateral forces are preferably balanced to within 10 percent of the total axial force on the bit. In another aspect, the center of mass of the bit is located less than about 2. 5 percent of the diameter of the bit from the axis of rotation.

US Patent:

6474425, Nov 5, 2002

Filed:

Jul 19, 2000

Appl. No.:

09/619742

Inventors:

David Truax - Houston TX
Timothy P. Beaton - The Woodlands TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1000

US Classification:

175398, 1754051, 175434

Abstract:

A drill bit including a bit body and a plurality of blades formed in the bit body. The blades are formed, at least in part, from a base matrix material that on one embodiment is impregnated with abrasive particles. One side of the bit is formed, with respect to its axis of rotation, to a smaller radius than the opposite side of the bit. The asymmetry of the bit enables the bit to drill a larger diameter hole than a pass through diameter of the bit. The opposite side defines a contact angle between the bit and a formation. In one embodiment, the contact angle is at least 140 degrees. In one embodiment, a plurality of inserts may be located on the blades to provide gage protection. In another embodiment, the bit may also include a gage sleeve that helps keep the bit stabilized in the wellbore.

US Patent:

6725953, Apr 27, 2004

Filed:

Apr 22, 2002

Appl. No.:

10/128006

Inventors:

David K. Truax - Houston TX
Thomas Walter Oldham - The Woodlands TX
Carl Edward Penuel - Houston TX
Duane R. Van Waes - Cypress TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1046

US Classification:

175434, 175426, 175428, 175435

Abstract:

An earth-boring bit comprises a bit body bit body in which are mounted a plurality of cutting structures inserts, wherein at least a portion of the cutting structures comprise diamond-impregnated inserts having a total thermal exposure of less than 25 minutes above 1500Â F. The diamonds can be natural or synthetic diamond. The bit body itself may be diamond-impregnated, in which case it is preferred that the diamonds in the inserts make up at least 40% of the total diamond in the bit.

US Patent:

6808031, Oct 26, 2004

Filed:

Apr 5, 2001

Appl. No.:

09/827131

Inventors:

Graham Mensa-Wilmot - Houston TX
David K. Truax - Houston TX

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 1036

US Classification:

175434, 175374

Abstract:

A variety of large diameter PDC cutters for use in drill bits are disclosed. Specifically, various PDC cutters having a diameter between 19. 0 mm and 25. 0 mm are disclosed. The various PDC cutters disclosed include an elliptical PDC cutter, wherein a major diameter of the elliptical cutter is selected from a range of 19. 0 mm to 25. 0 mm, a circular PDC cutter, wherein a diameter of the circular cutter falls between 19. 0 mm and 25. 0 mm, and a non-planar substrate cutter, wherein a diameter of the non-planar cutter falls between 19. 0 mm and 25. 0 mm. Additionally, the thickness of the diamond table is increased as compared to prior art PDC cutters. The increase in diamond table thickness results in improved durability and performance.

US Patent:

6880650, Apr 19, 2005

Filed:

Feb 6, 2004

Appl. No.:

10/773502

Inventors:

Carl M. Hoffmaster - Houston TX, US
David K. Truax - Houston TX, US
Timothy P. Beaton - The Woodlands TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B007/28
E21B010/32

US Classification:

175263, 175406

Abstract:

An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one spiral blade is formed on at least one reamer pad. A plurality of cutting elements are disposed on the at least one spiral blade. An expandable reaming tool including at least two reamer pads connected to a tool body. The reamer pads are adapted to be displaced between a retracted position and an expanded position. At least one blade is formed on the at least two reamer pads. A plurality of cutting elements are disposed on the at least one blade and at least one gage protection element is disposed on a gage surface of the at least one blade. The plurality of cutting elements are arranged so as to enable the expandable reaming tool to backream a formation in a wellbore.

US Patent:

6883622, Apr 26, 2005

Filed:

Jun 22, 2001

Appl. No.:

09/888328

Inventors:

Timothy P. Beaton - The Woodlands TX, US
Thomas L. Young - Perth, AU
David K. Truax - Houston TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B010/26

US Classification:

175171, 175 57

Abstract:

A method is disclosed for drilling a wellbore. The method includes operating a turbine-type mud motor having a bi-center drill bit coupled to it, and applying an axial force to the bit which is selected so that the bit drills in a directionally stable manner. In one embodiment, the motor is a steerable motor operated to maintain a selected trajectory of the wellbore.