Kristian S Drivdahl

7975785, Jul 12, 2011

Nov 24, 2008

12/276870

Kristian S. Drivdahl - Park City UT, US
Michael D. Rupp - Murray UT, US

Longyear TM, Inc. - South Jordan UT

E21B 10/36
E21B 10/06

175425, 175332

Diamond-impregnated cutting tools including fibers and drilling systems incorporating such tools are described. The cutting tools contain a diamond-impregnated cutting portion that contains fibers made from carbon, glass, ceramic, polymer, and the like. The fibers may be used to both control the tensile strength and the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may also weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. As the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion. Using the fibers allows the cutting tools to last longer and make them safer and more economical because they need to be replaced less often.

8006782, Aug 30, 2011

Oct 14, 2008

12/250894

Kristian S. Drivdahl - Park City UT, US
Robert Eugene Able - Bozeman MT, US
Todd A. Nevenner - Murray UT, US
Kenneth Carl Altrichter - Little Falls MN, US

Longyear TM, Inc. - South Jordan UT

E21B 7/24

175 55

A drill head assembly includes a shaft having a shaft axis, an oscillator assembly operatively associated with the shaft, the oscillator assembly having at least one eccentrically weighted rotor configured to rotate about a pivot point to generate an oscillating vibratory force, wherein an oscillation centerline is defined transverse to the shaft axis and including the pivot point. The drill head assembly also includes a lower bearing coupled to the shaft on a first side of the oscillation centerline and an upper bearing coupled to the shaft on a second side of the oscillation centerline, the second side being opposite the first side.

8025107, Sep 27, 2011

Jan 6, 2009

12/349436

Kristian S. Drivdahl - Park City UT, US
Erik M. Gaugh - Park City UT, US
Michael D. Rupp - Murray UT, US

Longyear TM, Inc. - South Jordan UT

E21B 49/00
E21B 10/02
E21B 17/10

175 58, 1753252, 1754051

Reamers for use in core-sample drilling include PDC inserts. Such reamers with PDC inserts may be used to maintain borehole diameters, reduce deviation, and/or stabilize drill strings used in core sample drilling. The PDC inserts may be of different sizes and shapes and may be arranged around the reamers in various ways.

8146686, Apr 3, 2012

Sep 17, 2009

12/561936

Kristian S. Drivdahl - Park City UT, US
Michael D. Rupp - Murray UT, US

Longyear TM, Inc. - South Jordan UT

E21B 10/02
E21B 10/36

175332, 175426, 1754051

Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. A matrix is formed that contains fibers made from carbon, glass, ceramic, polymer, and the like. The matrix is then sintered to form a cutting portion of a drill bit. The type and concentration of the fibers can be modified to control the tensile strength and the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may be added to the cutting section to weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. As the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion.

8191445, Jun 5, 2012

Nov 24, 2008

12/276903

Kristian S. Drivdahl - Park City UT, US
Michael D. Rupp - Murray UT, US

Longyear TM, Inc. - Salt Lake City UT

B21K 5/02

761082, 175426

Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. A matrix is formed that contains fibers made from carbon, glass, ceramic, polymer, and the like. The matrix is then sintered to form a cutting portion of a drill bit. The type and concentration of the fibers can be modified to control the tensile strength and the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may be added to the cutting section to weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. As the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion.

8356677, Jan 22, 2013

Jun 29, 2011

13/172450

Kristian S. Drivdahl - Park City UT, US
Robert Eugene Able - Bozeman MT, US
Todd A. Nevenner - Murray UT, US
Kenneth Carl Altrichter - Little Falls MN, US

Longyear TM, Inc. - South Jordan UT

E21B 7/24

175 55, 173 49, 1661776

A drill head assembly includes a shaft having a shaft axis, an oscillator assembly operatively associated with the shaft, the oscillator assembly having at least one eccentrically weighted rotor configured to rotate about a pivot point to generate an oscillating vibratory force, wherein an oscillation centerline is defined transverse to the shaft axis and including the pivot point. The drill head assembly also includes a lower bearing coupled to the shaft on a first side of the oscillation centerline and an upper bearing coupled to the shaft on a second side of the oscillation centerline, the second side being opposite the first side.

20080128170, Jun 5, 2008

Nov 30, 2007

11/948185

Kristian S. Drivdahl - Park City UT, US
Michael D. Rupp - Murray UT, US

B23B 27/20
E21B 25/04
B21K 5/02

175 58, 761081, 761082, 408145

Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. The cutting tools contain a diamond-impregnated cutting portion that contains fibers made from carbon, glass, ceramic, polymer, and the like. The fibers can be in any form, including chopped and milled fibers. The fibers may also be coated with metal, ceramic, or other performance-enhancing coatings. The fibers may be used to both control the tensile strength control the erosion rate of the matrix to optimize the cutting performance of the tools. Additionally, the fibers may also weaken the structure and allow higher modulus binders to be used for the cutting tools at a lower cost, allowing the amount of fibers to be tailored to retain the diamonds in the cutting portion for the desired amount. And as the cutting portion erodes, the fibers may also increase the lubricity at the face of the cutting portion. Using the fibers allows the cutting tools to last longer and make them safer and more economical because they need to be replaced less often.

20110303465, Dec 15, 2011

Aug 24, 2011

13/217107

Michael D. Rupp - Murray UT, US
Cody A. Pearce - Midvale UT, US
Christian M. Lambert - Draper UT, US
Kristian S. Drivdahl - Park City UT, US

LONGYEAR TM, INC. - South Jordan UT

E21B 10/46
E21B 10/26
E21B 10/02

175403, 175425, 175406, 175434

Impregnated drilling tools include elongated structures that provide enhanced properties. The drilling tools contain a diamond-impregnated cutting section that contains elongated structures made from carbon, glass, ceramic, and the like. The elongated structures can comprise tubes, fibers, or rods. In one or more implementations the elongated structures are nano-sized. The elongated structures can control the tensile strength and/or the erosion rate of the drilling tools to optimize the cutting performance of the tools. Additionally, the elongated structures may also weaken the cutting section in one or more implementations; thereby, allowing higher strength binders to be used. Such higher modulus binders can cost less and allow for tailoring of the cutting section to retain the diamonds for the desired amount of time. As the cutting section erodes, the elongated structures may also increase the lubricity at the face of the cutting section.