Matthew P Isbell, 36880 Highway 6 S UNIT 4024, Houston, TX 77079

6408958, Jun 25, 2002

Oct 23, 2000

09/694518

Matthew R. Isbell - Houston TX
Rudolf C. O. Pessier - Houston TX
Michael L. Doster - Spring TX
Mark W. Dykstra - Kingwood TX
William H. Heuser - The Woodlands TX

Baker Hughes Incorporated - Houston TX

E21B 1016

175431, 175432

A cutting assembly comprised of first and second superabrasive cutting elements including at least one rotationally leading cutting element having a cutting face oriented generally in a direction of intended rotation of a bit on which the assembly is mounted to cut a subterranean formation with a cutting edge at an outer periphery of the cutting face, and a rotationally trailing cutting element oriented substantially transverse to the direction of intended bit rotation and including a relatively thick superabrasive table configured to cut the formation with a cutting edge located between a beveled surface at the side of the superabrasive table and an end face thereof. A rotationally trailing cutting element may be associated with and disposed at a location on the bit at least partially laterally intermediate locations of two rotationally leading cutting elements. Drill bits equipped with the cutting assembly are also disclosed.

6443246, Sep 3, 2002

Nov 2, 2000

09/704847

Rudolf Carl Otto Pessier - The Woodlands TX
Brian Christopher Wiesner - Edmond OK
George Edward Dolezal - Friendswood TX
Matthew Ray Isbell - Houston TX
James Lawrence Jacobsen - Shreveport LA
Brian Andrew Baker - Spring TX

Baker Hughes Incorporated - Houston TX

E21B 1016

175378, 175331

An earth-boring bit for attachment to a drill string has rotatable cones with rows of cutting elements. The cutting elements are arranged in generally circumferential rows on each of the cones and interference fit into apertures in the shell surface. The rows include a heel row of cutting elements on the heel surface of each of the cones, and an adjacent row of adjacent row cutting elements next to the heel row cutting elements. Each heel row cutting element has at least one counterpart adjacent row cutting element that is spaced no farther from it than any other adjacent row cutting element, defining a proximal pair. Each of the cutting elements in each of the proximal pairs has a grip ratio, which is the barrel length divided by the diameter. Some of the proximal pairs having cutting elements with higher grip ratios than other cutting elements. None of the proximal pairs has both cutting elements with higher grip ratios.

6510906, Jan 28, 2003

Nov 10, 2000

09/709999

Volker Richert - Celle/Gross-Hehlen, DE
Van J. Brackin - Spring TX
Matthew R. Isbell - Houston TX
Douglas J. Bobrosky - Calgary, CA

Baker Hughes Incorporated - Houston TX

E21B 1046

175 39, 175375, 175379, 175428, 175434

A drill bit employing a plurality of discrete, post-like diamond grit impregnated cutting structures extending upwardly from abrasive particulate-impregnated blades defining a plurality of fluid passages therebetween on the bit face. PDC cutters with faces oriented in the general direction of bit rotation are placed in the cone of the bit, which is relatively shallow, to promote enhanced drilling efficiency through softer, non-abrasive formations. A plurality of ports, configured to receive nozzles therein are employed for improved drilling fluid flow and distribution. The blades may extend radially in a linear fashion, or be curved and spiral outwardly to the gage to provide increased blade length and enhanced cutting structure redundancy.

6843333, Jan 18, 2005

Nov 20, 2002

10/301359

Volker Richert - Celle/Gross-Hehlen, DE
Van J. Brackin - Spring TX, US
Matthew R. Isbell - Houston TX, US
Douglas J. Bobrosky - Alberta, CA
M. MacLean Price - Kingwood TX, US

Baker Hughes Incorporated - Houston TX

E21B 1046

175379, 175428, 175434, 175435

A drill bit employing a plurality of discrete, post-like, abrasive, particulate-impregnated cutting structures extending upwardly from abrasive, particulate-impregnated blades defining a plurality of fluid passages therebetween on the bit face. Additional cutting elements may be placed in the cone of the bit surrounding the centerline thereof. The blades may extend radially in a linear fashion, or be curved and spiral outwardly to the gage to provide increased blade length and enhanced cutting structure redundancy. Additionally, discrete protrusions may extend outwardly from at least some of the plurality of cutting structures. The discrete protrusions may be formed of a thermally stable diamond product and may exhibit a generally triangular cross-sectional geometry relative to the direction of intended bit rotation.

6883623, Apr 26, 2005

Oct 9, 2002

10/268595

Ronny D. McCormick - Magnolia TX, US
Mumtaz Ball - Maracaibo, VE
Mark E. Anderson - Portland TX, US
Mark W. Dykstra - Kingwood TX, US
Michael L. Doster - Spring TX, US
Matthew R. Isbell - Houston TX, US

Baker Hughes Incorporated - Houston TX

E21B017/10

175408, 175 57, 175415, 175426

A rotary drill bit for drilling subterranean formations configured with at least one protective structure proximate to the rotationally leading and trailing edges of a gage trimmer, wherein the at least one protective structure is positioned at substantially the same exposure as its associated gage trimmer. Particularly, the apparatus of the present invention may provide protection for gage trimmers during drilling, tripping, and/or rotation within a casing; i. e. , when changing a drilling fluid. Protective structures may be configured and located according to anticipated drilling conditions including helix angles. In addition, a protective structure may be proximate to more than one gage trimmer while having a substantially equal exposure to each associated gage trimmer. Methods of use and a method of rotary bit design are also disclosed.

7066288, Jun 27, 2006

Nov 1, 2002

10/286299

Greg Van Klompenburg - The Woodlands TX, US
Brian A. Baker - Spring TX, US
Matthew R. Isbell - Houston TX, US

Baker Hughes Incorporated - Houston TX

E21B 10/16

175431, 175378, 175413, 175432

Asymmetrical compacts are utilized in certain places on roller cones of an earth boring bit to increase the number of compacts in certain rows. The compacts that are pressed into holes in rows on the cones. The compacts are of tungsten carbide and have a cutting end axis and a barrel axis. The barrel axis intersects the cutting end axis at an obtuse angle. In the heel row, the barrel axis of at least some of the compacts is rotated to have less inclination than the cutting end axis. In an adjacent row to the heel row, each of the compacts has a barrel axis that is rotated to have more inclination than its cutting end axis and more inclination than the barrel axes of the heel row.

7096981, Aug 29, 2006

Nov 1, 2002

10/286480

Greg Van Klompenburg - The Woodlands TX, US
Brian A. Baker - Spring TX, US
Matthew R. Isbell - Houston TX, US

Baker Hughes Incorporated - Houston TX

E21B 10/16

175378, 175431, 175432, 175413

Compacts are oriented in certain places on roller cones of an earth boring bit to increase the number of compacts in certain rows. The compacts that are pressed into holes in rows on the cones. The compacts are of tungsten carbide and have a cutting end axis and a barrel axis. The barrel axis intersects the cutting end axis at an obtuse angle. In one of the cones, the barrel axis of at least some of the compacts is rotated to have less inclination than the barrel axis of the compact nearest to it. The nearest compact may be in the same row or an adjacent row. Also, at least some of the compacts may be asymmetrical, with a cutting end axis that diverges from a barrel axis.

7497280, Mar 3, 2009

Jan 27, 2005

11/044782

Van J. Brackin - Conroe TX, US
Jeffrey B. Lund - The Woodlands TX, US
Danny E. Scott - Montgomery TX, US
Marcus R. Skeem - Sandy UT, US
Matthew R. Isbell - Norman OK, US

Baker Hughes Incorporated - Houston TX

E21B 10/46

175374, 175425, 175426, 175431, 175433, 175434

An abrasive-impregnated cutting structure for use in drilling a subterranean formation is disclosed. The abrasive-impregnated cutting structure may comprise a plurality of abrasive particles dispersed within a substantially continuous matrix, wherein the abrasive-impregnated cutting structure exhibits an anisotropic wear resistance. One or more of the amount, average size, composition, properties, shape, quality, strength, and concentration of the abrasive particles may vary within the abrasive-impregnated cutting structure. Anisotropic wear resistance may relate to a selected direction, such as, for example, one or more of an expected direction of engagement of the abrasive-impregnated cutting structure with the subterranean formation and an anticipated wear direction. Anisotropic wear resistance of an abrasive-impregnated cutting structure may be configured for forming or retaining a formation-engaging leading edge thereof. A rotary drag bit including at least one abrasive-impregnated cutting structure is disclosed.