DR. MATHEWS LAL GEORGE, MD
Osteopathic Medicine in Houston, TX

7814998, Oct 19, 2010

Dec 17, 2007

11/958082

Suresh G. Patel - The Woodlands TX, US
Mathews George - Houston TX, US
Richard J. McClellan - The Woodlands TX, US
Paul E. Pastusek - Houston TX, US
Innocent R. Rugashoborola - Houston TX, US
Nicholas J. Lyons - Houston TX, US

Baker Hughes Incorporated - Houston TX

E21B 10/46

175432, 175434

A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least a portion of its periphery, and a surface comprising a chamfer extending forwardly and inwardly from proximate a peripheral cutting edge at a first acute angle of orientation of greater than about 45° with respect to the longitudinal axis of the cutting element, and to no greater than a selected depth. The chamfer may be arcuate or planar, and of a dimension sufficient to ensure that a wear flat generated during use of the cutting element remains outside the inner boundary of the chamfer within the chamfer envelope, and small enough to maintain aggressive cutting characteristics for the cutter. Drill bits and drilling tools bearing the cutting elements are also disclosed.

7360608, Apr 22, 2008

Sep 9, 2004

10/938424

Van J. Brackin - Conroe TX, US
Brian E. Miller - The Woodlands TX, US
Mathews George - Houston TX, US

Baker Hughes Incorporated - Houston TX

E21B 10/46, E21B 10/42

175 57, 175431, 175432

A rotary drill bit is disclosed, including at least one cutting element affixed thereto and configured to form a distinct borehole surface in response to drilling a subterranean formation. At least one substantially helically extending feature associated with the at least one cutting element may be formed upon the leading end of the rotary drill bit. Alternatively, a rotary drill bit may include a plurality of substantially helically extending features. Methods of operating a rotary drill bit are also disclosed. Specifically, a subterranean formation may be drilled with a rotary drill bit to form an on-center bottomhole pattern, which may be at least partially contacted by at least one substantially helically extending feature of the rotary drill bit. Alternatively, a subterranean formation may be contacted with at least one substantially helically extending feature of the rotary drill bit. A method of designing a rotary drill bit is disclosed.

2007010, May 10, 2007

Nov 8, 2006

11/594710

David Gavia - The Woodlands TX, US
Jack Oldham - Conroe TX, US
Mathews George - Houston TX, US
Michael Doster - Spring TX, US

G06G 7/48

703007000

A method for evaluating existing drill bits and drill bit designs includes measuring several desired characteristics of a bit, including the wear experienced in drilling a formation, such as an actual formation or a simulated formation or a laboratory test fixture. A computer model may be used to evaluate the work-force and/or the sliding-wear rates that cutting elements of the bit experience as compared with the rate-of-penetration and/or durability of the bit. This information may be used to design a new drill bit, which may involve modification of the cutting elements (e.g., moving the location, volume (size and shape) or number of cutting elements from areas of the bit that receive lower work-force and sliding-wear rates to those areas that experience relatively greater work-force and sliding wear-rates. This may permit the cutting elements to be oriented more aggressively relative to a formation to be drilled. Other parameters that may be optimized include the bit profile, blade count, hydraulics, or the like.

2009003, Feb 5, 2009

Aug 3, 2007

11/890067

Mathews George - Houston TX, US
Curtis A. Proske - The Woodlands TX, US

B23K 31/02

228198

A reactive foil is used to join rock bit components such as leg sections, hardfacing, and cutter elements to the rolling cone earth-boring bit body. A small pulse of localized energy ignites the foil in a fraction of second to deliver the necessary amount of heat energy to reflow solder or braze and form a strong, true metallic joint. The reaction in the foil may be activated using optical, electrical, or thermal sources.

8011275, Sep 6, 2011

Feb 20, 2008

12/034330

Van J. Brackin - Conroe TX, US
Brian E. Miller - The Woodlands TX, US
Mathews George - Houston TX, US

Baker Hughes Incorporated - Houston TX

B21K 5/04, E21B 10/46

761081, 175 57

A method of designing a rotary drill bit includes selecting and positioning a plurality of cutting elements on a rotary drill bit. At least one substantially helically extending feature is selected and positioned to rotationally follow at least one of the plurality of cutting elements, the at least one substantially helically extending feature exhibiting a selected maximum Helical Pitch.