David Kevin Truax
Engineering at Gulf Bank Rd, Houston, TX
License number
Louisiana EI.0009317
Issued Date
May 31, 1983
Expiration Date
Dec 31, 1983
Category
Civil Engineer
Address
Address
7726 W Gulf Bank Rd APT 7726, Houston, TX 77040
Professional information
Bi-Centered Drill Bit Having Improved Drilling Stability, Mud Hydraulics And Resistance To Cutter Damage
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
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.
Cutting Element With Canted Design For Improved Braze Contact Area
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
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.
Drill Bit Having Diamond Impregnated Inserts Primary Cutting Structure
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
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 1500° 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.
Roller Cone Drill Bit Having Designed Walk Characteristics
US Patent:
2003013, Jul 24, 2003
Filed:
Jan 24, 2002
Appl. No.:
10/057771
Inventors:
David Truax - Houston TX, US
Douglas Rock - Houston TX, US
Graham Mensa-Wilmot - Houston TX, US
Douglas Rock - Houston TX, US
Graham Mensa-Wilmot - Houston TX, US
International Classification:
E21B010/00
US Classification:
175/376000, 175/378000, 076/108200
Abstract:
A roller cone drill bit having selected left hand walk is disclosed. The bit includes a bit body adapted to couple to a drill string, and a plurality of legs depending from the bit body. Each leg has a roller cone rotatably mounted thereon. Each cone includes a plurality of cutting elements thereon. At least one cone has a nose point of its profile displaced radially inward with respect to a nose point of the profile of the other cones. A roller cone drill bit having selected right hand walk is also disclosed. The bit include a bit body adapted to couple to a drill string, and a plurality of legs depending from the bit body. Each leg has a roller cone rotatably mounted thereon, each cone including a plurality of cutting elements thereon defining a profile. At least one cone has a nose point of the profile displaced radially outward with respect to a nose point of the profile of the other cones.
Matrix Hard Facing By Lost Wax Process
US Patent:
5944128, Aug 31, 1999
Filed:
Feb 6, 1998
Appl. No.:
9/019877
Inventors:
David Truax - Houston TX
Douglas Caraway - Kingwood TX
Stephen M. Evans - Standish, GB
Andrew Murdock - Stonehouse, GB
Douglas Caraway - Kingwood TX
Stephen M. Evans - Standish, GB
Andrew Murdock - Stonehouse, GB
Assignee:
Camco International (UK) Limited - Stonehouse
International Classification:
E21B 1008
US Classification:
175374
Abstract:
A drill bit comprises a main body part having a shank for connection to a drill string, an end face, an internal passage for supplying drilling fluid to the end face, a number of blades extending from the end face outwardly and longitudinally of the central axis of rotation of the bit, and a number of cutters mounted on each said blade. Each blade comprises a central metal core at least partly surrounded by solid infiltrated matrix material. A method of manufacturing such a drill bit includes the steps of forming a main body part from metal, applying to the outer surface of the main body part a coating layer of wax which liquefies at elevated temperature, applying to the coated body part mold-forming material to provide a self-supporting mold surrounding the coated body part, and raising the temperature of the body and surrounding mold sufficiently to liquefy the coating material. The liquefied coating is then drained from the mold, and the cavities left by the coating material are packed with powdered matrix material, which is then infiltrated with a binder alloy at elevated temperature to form a solid infiltrated matrix layer, on the bit body part, corresponding to the layer of wax previously applied.
Cutting Element With Canted Interface Surface And Bit Body Incorporating The Same
US Patent:
7395885, Jul 8, 2008
Filed:
Jan 23, 2007
Appl. No.:
11/657198
Inventors:
Ronald K. Eyre - Orem UT, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/48
US Classification:
175432, 175430, 175431
Abstract:
The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and to a bit incorporating such cutting element. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.
Cutting Element With Canted Interface Surface And Bit Body Incorporating The Same
US Patent:
7165636, Jan 23, 2007
Filed:
Nov 4, 2005
Appl. No.:
11/267644
Inventors:
Ronald K. Eyre - Orem UT, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/48
US Classification:
175432, 175430, 175431
Abstract:
The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and a method of forming the same. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.
Coarse Carbide Substrate Cutting Elements And Method Of Forming The Same
US Patent:
7017677, Mar 28, 2006
Filed:
May 14, 2003
Appl. No.:
10/437750
Inventors:
Madapusi K. Keshavan - The Woodlands TX, US
Anthony Griffo - The Woodlands TX, US
David Truax - Houston TX, US
Anthony Griffo - The Woodlands TX, US
David Truax - Houston TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/08, E21B 10/46
US Classification:
1727013, 172681, 175374, 175426, 175434, 75236
Abstract:
Cutting elements having coarse grain substrates and ultra hard material layers are provided. The substrates are formed from coarse grain size particles of tungsten carbide. A method of forming such cutting elements and a drag bit incorporating such cutting elements are also provided.
Method For Forming Cutting Elements
US Patent:
2003007, May 1, 2003
Filed:
Dec 13, 2002
Appl. No.:
10/318734
Inventors:
Ronald Eyre - Orem UT, US
Madapusi Keshavan - Sandy UT, US
David Truax - Houston TX, US
Madapusi Keshavan - Sandy UT, US
David Truax - Houston TX, US
International Classification:
E21B010/62
US Classification:
175/432000, 076/108200
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 and a method of forming the same. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.
Cutting Element
US Patent:
6991049, Jan 31, 2006
Filed:
Feb 20, 2002
Appl. No.:
10/079293
Inventors:
Ronald K. Eyre - Orem UT, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Madapusi K. Keshavan - Sandy UT, US
David Truax - Houston TX, US
Assignee:
Smith International, Inc. - Houston TX
International Classification:
E21B 10/48
US Classification:
175432, 175430, 175431
Abstract:
The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and a method of forming the same. One or a plurality of transition layers may be provided between the ultra hard material layer and the cutting element body.