1
Matthew R Isbell, Rudolf C O Pessier, Michael L Doster, Mark W Dykstra, William H Heuser: Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped. Baker Hughes Incorporated, TraskBritt, June 25, 2002: US06408958 (114 worldwide citation)

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 cu ...


2
Rudolf C O Pessier: Steerable rotary drag bit with longitudinally variable gage aggressiveness. Baker Hughes Incorporated, Trask Britt & Rossa, October 19, 1999: US05967247 (102 worldwide citation)

A rotary drag bit including a gage design which facilitates steerability while preventing lateral displacement of the bit and attendant ledging of the borehole wall, and reams and conditions the borehole wall as the bit advances through the formation. The bit includes an elongated gage section compr ...


3
Rudolf C O Pessier, Danny E Scott, Matthias Meister, Ronny D McCormick: Fixed cutter bit with chisel or vertical cutting elements. Baker Hughes Incorporated, Bracewell & Patterson L, December 25, 2001: US06332503 (97 worldwide citation)

An array of chisel-shaped cutting elements are mounted to the face of a fixed cutter bit. Each cutting element has a crest and an axis which is inclined relative to the borehole bottom. The cutting elements have a hardened diamond exterior on all surfaces in contact with the formation. The chisel-sh ...


4
Robert E Grimes, Danny E Scott, Rudolf C O Pessier: Fixed cutter bit with shear cutting gage. Baker Hughes Incorporated, Robert A Felsman, Mark D Perdue, November 21, 1995: US05467836 (91 worldwide citation)

An earth-boring bit of the fixed cutter variety is provided with hard gage inserts that protrude from the gage surface of the cutter to engage the side of the borehole for holding gage. The gage insert has a substantially flat, polygonal face defining at least a pair of sharp cutting edges and at le ...


5
Danny E Scott, Robert E Grimes, Matthew R Isbell, Rudolf C O Pessier: Earth-boring bit with improved cutting structure. Baker Hughes Incorporated, Robert A Felsman, Mark D Perdue, January 2, 1996: US05479997 (91 worldwide citation)

An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface intersecting a heel surface. A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter and include a heel ...


6
Matthew R Isbell, Rudolf C O Pessier: Earth-boring bit with an advantageous cutting structure. Baker Hughes Incorporated, Robert A Felsman, Mark D Perdue, May 17, 1994: US05311958 (90 worldwide citation)

An earth-boring bit is provided with three cutters, two of the three cutters are provided with heel disk cutting elements defined by a pair of generally oppositely facing disk surfaces that generally continuously converge to define a circumferential heel disk crest. One of the two cutters having hee ...


7
Danny E Scott, Rudolf C O Pessier: Superabrasive-tipped inserts for earth-boring drill bits. Baker Hughes Incorporated, Trask Britt & Rossa, April 6, 1999: US05890552 (82 worldwide citation)

Superabrasive cutting elements for rolling cutter bits, and mounting techniques for such cutting elements. The insert-type cutting elements employ self-supporting superabrasive masses on the exposed tips thereof, the elements being mounted to the rolling cutters by insertion of supporting stud-like ...


8
Mark W Dykstra, James A Norris, Christopher C Beuershausen, Rudolf C O Pessier: Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability. Baker Hughes Incorporated, Trask Britt, January 16, 2001: US06173797 (80 worldwide citation)

A rotary drill bit suitable for directional drilling. The bit includes a bit body from which extend legs carrying rotatable cutters. The body carries primary gage pads, above which secondary gage pads may be either longitudinally spaced or rotationally spaced, or both. Longitudinally leading edges o ...


9
Rudolf C O Pessier, Danny E Scott: Rolling cone bit with shear cutting gage. Baker Hughes Incorporated, Robert A Felsman, Mark D Perdue, September 13, 1994: US05346026 (72 worldwide citation)

An earth-boring bit has a cutter provided with hard gage inserts that protrude from the gage surface of the cutter to engage the side of the borehole for holding gage. The gage insert has a substantially flat, polygonal face, the sides of the polygonal face defining at least a pair of sharp cutting ...


10
Michael L Doster, Rudolf C O Pessier, David M Schnell, Bart T McDonald: Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter. Baker Hughes Incorporated, Trask Britt & Rossa, June 16, 1998: US05765653 (71 worldwide citation)

A method and apparatus for reaming or enlarging a borehole with enhanced stability. A pilot stabilization pad (PSP) having an axially and circumferentially tapered entry surface and a circumferential transition surface above is employed to enhance the transition from the smaller diameter borehole to ...