Kenneth L Jensen

US Patent:

6408959, Jun 25, 2002

Filed:

Feb 19, 2001

Appl. No.:

09/788950

Inventors:

Kenneth E. Bertagnolli - Sandy UT 84070
Kenneth M. Jensen - Springville UT 84663

International Classification:

E21B 1036

US Classification:

175432, 175434, 76DIG 12

Abstract:

A cutting element, insert or compact, is provided for use with drills used in the drilling and boring of subterranean formations. This new insert, in its preferred embodiment, has a âhoopâ region of polycrystalline diamond extending around the periphery of the compact to reduce the residual stresses inherent in thick diamond regions of cutters, thereby providing improved wear and durability characteristics because it avoids failures due to stresses, delaminations and fractures caused by the differences in thermal expansion coefficient between the diamond and the substrate during sintering. Moreover, this invention may provide multiple polycrystalline diamond edges as the PDC wears.

US Patent:

20010004946, Jun 28, 2001

Filed:

Nov 28, 1997

Appl. No.:

08/980471

Inventors:

KENNETH M. JENSEN - OREM UT, US

International Classification:

E21B010/36

US Classification:

175/428000, 175/420100

Abstract:

A cutting element, or insert, is provided for use with drills used in the drilling and boring of subterranean formations. This new insert has improved wear characteristics while maximizing the manufacturability and cost effectiveness of the insert. This invention accomplishes these objectives by employing a superabrasive diamond layer of increased depth and by making use of diamond layer surface shape that is generally convex.

US Patent:

61896349, Feb 20, 2001

Filed:

Sep 18, 1998

Appl. No.:

9/157074

Inventors:

Kenneth E. Bertagnolli - Sandy UT
Kenneth M. Jensen - Springville UT

Assignee:

U.S. Synthetic Corporation - Orem UT

International Classification:

E21B 1036

US Classification:

175432

Abstract:

A cutting element, insert or compact, is provided for use with drills used in the drilling and boring of subterranean formations. This new insert, in its preferred embodiment, has a "hoop" region of polycrystalline diamond extending around the periphery of the compact to reduce the residual stresses inherent in thick diamond regions of cutters. This compact has improved wear and durability characteristics because it avoids failures due to stresses, delaminations and fractures caused by the differences in thermal expansion coefficient between the diamond and the substrate during sintering. Moreover, this invention may provide multiple polycrystalline diamond edges as the PDC wears. This exposure of multiple polycrystalline diamond edges slows the rate of wear flat surface development and reduces the weight on the bit required for acceptable drill penetration rates.

US Patent:

59441291, Aug 31, 1999

Filed:

Nov 28, 1997

Appl. No.:

8/980499

Inventors:

Kenneth M. Jensen - Orem UT

Assignee:

U.S. Synthetic Corporation - Orem UT

International Classification:

E21B 1046

US Classification:

175430

Abstract:

An improved surface finish for non-planar drill inserts or cutting elements is provided for use on inserts used in the drilling and boring of subterranean rock formations. This new surface finish provides an insert with improved wear characteristics, a decrease in heat generation, a decrease in frictional work loss, and a minimization of failure inducting surface cracks. This invention accomplishes these objectives by a process of polishing the cutting or contact surface of the insert to a very high degree of smoothness.

US Patent:

61963402, Mar 6, 2001

Filed:

Nov 28, 1997

Appl. No.:

8/980389

Inventors:

Kenneth M. Jensen - Orem UT
Randy S. Cannon - Provo UT
Troy J. Medford - Orem UT

Assignee:

U.S. Synthetic Corporation - Orem UT

International Classification:

E21B 1056

US Classification:

175431

Abstract:

A cutting element insert is provided for use with drills used in the drilling and boring through of subterranean formations. This new insert has a modified diamond surface shape having ridges, facets and/or other discontinuities on the cutting surface topography, formed on or about an otherwise non-planar shape, such as spherical, hemispherical, conical or the like. This modified diamond layer shape provides increased cutting stress at the diamond/rock interface, thereby causing the rock to fail with less over all drilling energy being required, while simultaneously introducing little additional stresses to the cutter or insert.

US Patent:

58710604, Feb 16, 1999

Filed:

Feb 20, 1997

Appl. No.:

8/803354

Inventors:

Kenneth M. Jensen - Orem UT
Stephen R. Jurewicz - Los Angeles CA

International Classification:

E21B 1036

US Classification:

1754202

Abstract:

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 mechanically attaching the layer of abrasion and corrosion resistant polycrystalline material to the substrate that ordinarily is tungsten carbide. The chemical bond is formed during high pressure and high temperature sintering. Mechanically, the abrasion and corrosion resistant layer is attached to the substrate by means of irregularities on the substrate's top surface. These irregularities are designed to distribute stress and minimize the number of features that would lead to crack formation and subsequent failure of the insert. These surface irregularities are not sculptured features on the substrate that are of difficult or impossible manufacture, but they can be manufactured by pre- or post-sintering shaping methods.

US Patent:

58758623, Mar 2, 1999

Filed:

Jul 14, 1997

Appl. No.:

8/892376

Inventors:

Stephen R Jurewicz - So. Jordan UT
Kenneth M Jensen - Orem UT

Assignee:

U.S. Synthetic Corporation - Orem UT

International Classification:

E21B 1046

US Classification:

175432

Abstract:

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 orientation. The transition layer manipulates residual stress caused by both thermal expansion and compressibility differences between the two materials and thus increases attachment strength between the diamond and carbide substrate by adjusting the pattern, density, height and width of the projections.

US Patent:

57069069, Jan 13, 1998

Filed:

Feb 15, 1996

Appl. No.:

8/602076

Inventors:

Stephen R. Jurewicz - South Jordan UT
Kenneth M. Jensen - Orem UT
Gordon A. Tibbitts - Salt Lake City UT

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 1046
E21B 1058

US Classification:

175428

Abstract:

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 a portion of its periphery, and a rake land extending forwardly and inwardly from the cutting edge at an angle of between about 10. degree. and 80. degree. to the longitudinal axis of the cutting element for a width, measured along the surface of the rake land, of not less than about 0. 050 inch. The interface between the superabrasive volume and the substrate, taken to the rear of the cutting edge, is located no less than about 0. 015 inch to the rear of the cutting edge.