1
Stephen R Jurewicz, Kenneth M Jensen: Polycrystalline diamond cutter with integral carbide/diamond transition layer. U S Synthetic Corporation, Lloyd W Sadler, March 2, 1999: US05875862 (152 worldwide citation)

A composite body cutting instrument formed of a polycrystalline diamond layer sintered to a carbide substrate with a carbide/diamond transition layer. The transition layer is made by creating carbide projections perpendicular to the plane of the carbide substrate face in a random or nonlinear orient ...


2
Stephen R Jurewicz, Kenneth M Jensen, Gordon A Tibbitts: Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped. Baker Hughes Incorporated, Trask Britt & Rossa, January 13, 1998: US05706906 (110 worldwide citation)

A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table between about 0.070 inch and 0.150 inch thickness, mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least ...


3
Trent N Butcher, Ralph M Horton, Stephen R Jurewicz, Danny E Scott, Redd H Smith: Polycrystalline diamond cutters having modified residual stresses. Baker Hughes Incorporated, Trask Britt, April 24, 2001: US06220375 (107 worldwide citation)

The residual stresses that are experienced in polycrystalline diamond cutters, which lead to cutter failure, can be effectively modified by selectively thinning the carbide substrate subsequent to high temperature, high pressure (sinter) processing, by selectively varying the material constituents o ...


4
Kenneth M Jensen, Stephen R Jurewicz: Attachment geometry for non-planar drill inserts. Lloyd W Sadler, February 16, 1999: US05871060 (106 worldwide citation)

A manufacturing method and a drill bit composite insert for performing mechanical actions that require high wear and impact resistance are provided. The composite insert has improved interface strength and improved residual stress distribution. These improved features are achieved by chemically and ...


5
Stephen R Jurewicz, Kenneth M Jensen, Gordon A Tibbitts: Superabrasive cutting element with enhanced durability and increased wear life and apparatus so equipped. Baker Hughes Incorporated, Trask Britt, March 20, 2001: US06202770 (105 worldwide citation)

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 first surface ex ...


6
Stephen R Jurewicz, Kenneth M Jensen, Gordon A Tibbitts: Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped. Baker Hughes Incorporated, Trask Britt & Rossa, December 14, 1999: US06000483 (85 worldwide citation)

A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table between about 0.070 inch and 0.150 inch thickness, mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least ...


7
Danny E Scott, Stephen R Jurewicz: Rotary rock bit with improved diamond filled compacts. Hughes Tool Company, Charles D Gunter Jr, June 9, 1992: US05119714 (64 worldwide citation)

In an improved earth boring bit of the type having one or more rotable cones secured to bearing shafts, an improved cutting structure having diamond filled compacts used as a wear resistant inserts. The improved compacts have hard metal jackets and integrally formed diamond cores. The improved compa ...


8
Danny E Scott, Rudolf C O Pessier, Robert J Farr, Stephen R Jurewicz, Kenneth M Jensen, Paul D Jones: Earth-boring bit with super-hard cutting elements. Baker Hughes Incorporated, James E Bradley, Felsman Bradley Vaden Gunter & Dillon, August 8, 2000: US06098730 (63 worldwide citation)

An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements. At least one of the cutting elements has a generally cylindrical bod ...


9
Danny E Scott, Stephen R Jurewicz: Rotary rock bit with improved diamond-filled compacts. Baker Hughes Incorporated, Felsman Bradley Gunter & Dillon, September 28, 1993: US05248006 (63 worldwide citation)

In an improved earth boring bit of the type having one or more rotable cones secured to bearing shafts, an improved cutting structure having diamond filled compacts used as a wear resistant inserts. The improved compacts have hard metal jackets and integrally formed diamond cores. The improved compa ...


10
Stephen R Jurewicz: Cutter with polycrystalline diamond layer and conic section profile. U S Synthetic Corporation, Lloyd W Sadler, May 30, 2000: US06068071 (49 worldwide citation)

Polycrystalline diamond cutter (PDC) designs which substantially improve the penetration rate of fixed cutter drill bits while simultaneously reducing the wear on the bit during drilling operations are disclosed. The designs are based upon the observation that: 1) the wear pattern of a PDC is roughl ...