John H Bailey
Medical Practice in Provo, UT

7571782, Aug 11, 2009

Jun 22, 2007

11/767044

David R. Hall - Provo UT, US
John Bailey - Provo UT, US

E21B 10/36

175432, 175425

In one aspect of the invention, a drill bit comprises a steel body disposed intermediate a threaded end and a working face. The steel body comprises a plurality of steel blades disposed along an outer diameter of the body and extending radially away from an axis of rotation of the bit. A plurality of cutter elements is disposed on the plurality of steel blades and the blades each comprise a steel stiffness and a steel elastic modulus. At least one of the plurality of steel blades comprises a stiffening element and an overall stiffness at least 3. 5 times greater than the steel stiffness.

7694756, Apr 13, 2010

Oct 12, 2007

11/871644

David R. Hall - Provo UT, US
Francis Leany - Provo UT, US
John Bailey - Provo UT, US

E21B 10/04, E21B 10/26

175404, 175385

A drill bit has a bit body intermediate a working face and a shank end adapted for connection to a downhole drill string. The working face has at least three fixed blades converging towards a center of the working face and diverging towards a gauge of the bit, at least one blade having a cone region adjacent the center of the working face. The cone region increases in height away from the center of the working face and towards a nose portion of the at least one blade. An opening is formed in the working face at the center of the bit along an axis of the drill bit's rotation, the opening leading into a chamber with at least one wall. An indenting member is disposed within and extends from the opening, is substantially coaxial with the axis of rotation, and is fixed to the wall of the chamber.

7624824, Dec 1, 2009

Feb 26, 2008

12/037682

David R. Hall - Provo UT, US
John Bailey - Provo UT, US
Scott Dahlgren - Provo UT, US

E21B 10/26, E21B 10/40

175389, 175415

A drill bit assembly comprises a bit body intermediate a shank and a working face. The shank is adapted for connection to a drill string. The drill string comprising a fluid passage at least partially disposed within the body. A hammer assembly is movably disposed within the fluid passage along it central axis, the hammer assembly comprises a proximal end stabilized by a centralized upper bearing and a distal end stabilized by centralized a lower bearing. The distal end protrudes out of the working face and the hammer assembly comprises a carrier between the upper and lower bearings. Wherein, under normal drilling operations the carrier is adapted to resist a fluid pressure within the fluid passageway such that the fluid pressure will further extend the distal end of the hammer assembly from the working face by pushing on the carrier.

7641003, Jan 5, 2010

Feb 26, 2008

12/037733

David R Hall - Provo UT, US
John Bailey - Provo UT, US
Scott Dahlgren - Provo UT, US

E21B 10/26, E21B 10/40

175389, 175415

A drill bit assembly comprises a bit body intermediate a shank and a working face. The shank is adapted for connection to a drill string. The drill string comprising a fluid passage at least partially disposed within the body. A hammer assembly is movably disposed within the fluid passage along it central axis, the hammer assembly comprises a proximal end stabilized by a centralized upper bearing and a distal end stabilized by centralized a lower bearing. The distal end protrudes out of the working face and the hammer assembly comprises a carrier between the upper and lower bearings. Wherein, under normal drilling operations the carrier is adapted to resist a fluid pressure within the fluid passageway such that the fluid pressure will further extend the distal end of the hammer assembly from the working face by pushing on the carrier.

7527110, May 5, 2009

Oct 13, 2006

11/549513

David R. Hall - Provo UT, US
Ronald Crockett - Provo UT, US
Joe Fox - Provo UT, US
John Bailey - Provo UT, US

E21B 10/36

1754202, 175415

A percussive drill bit has a working face opposite a shank end. The working face has a central jack insert and a plurality of peripheral inserts extending from the working face. The ends of the plurality of the peripheral inserts form an impacting plane. The central jack insert is disposed within a recessed portion of the working face and has an end extending between the working face and the impacting plane.

7669938, Mar 2, 2010

Jul 6, 2007

11/774227

David R. Hall - Provo UT, US
John Bailey - Provo UT, US
Ronald B. Crockett - Provo UT, US

E21C 35/18

299111, 299113

In one aspect of the present invention, a high impact resistant tool, having a super hard material is bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide segment. A stem is formed in the base end of the carbide segment opposite the front end and the carbide stem is press fitted into bore of a steel body.

7451944, Nov 18, 2008

Jan 29, 2007

11/668407

David R. Hall - Provo UT, US
Ronald B. Crockett - Provo UT, US
Jeff Jepson - Provo UT, US
John Bailey - Provo UT, US

B02C 2/00

241207, 241294, 241300

In one aspect of the invention, a cone crusher comprises a crushing surface comprising a conical head and a concave bowl. At least one of the head or bowl comprises a segmented wear liner wherein at least one segment of the wear liner is held in place by compression.

7523794, Apr 28, 2009

Dec 18, 2006

11/612168

David R. Hall - Provo UT, US
Jeff Jepson - Provo UT, US
Ronald Crockett - Provo UT, US
John Bailey - Provo UT, US
Joe Fox - Provo UT, US

E21B 10/46

175374, 175426, 299111, 299113

In one aspect of the invention, a wear resistant assembly has at least one hard insert disposed within a recess formed within a surface. A hard material substantially surrounds the hard insert and is also disposed within the surface. The hard material is separated from the insert by an intermediate material softer than both the insert and the hard material.

7641002, Jan 5, 2010

Mar 28, 2008

12/057597

David R. Hall - Provo UT, US
John Bailey - Provo UT, US
Casey Webb - Provo UT, US

E21B 10/26, E21B 10/54

175385, 175426

In one aspect of the present invention, a rotary drag drill bit has a body intermediate a shank and a working face. The working face has a plurality of blades converging towards a center of the working face and diverging towards a gauge of the working face. A carbide section is fixed to the working face and positioned within a pocket disposed within an inverted cone of the working face. The carbide section has a distal end exposed within the working face.