1
David R Hall: Composite polycrystalline diamond compact. Smith International, Willian Brinks Olds Hofer Gilson & Lione, August 5, 1986: US04604106 (339 worldwide citation)

The invention is a composite polycrystalline diamond compact comprising at least one layer of diamond crystals and precemented carbide pieces which have been pressed under sufficient heat and pressure to create composite polycrystalline material wherein polycrystalline diamond and the precemented ca ...


2
Bela A Geczy: Thrust bearing assembly for a downhole drill motor. Smith International, Price Gess & Ubell, December 24, 1985: US04560014 (266 worldwide citation)

A bidirectional thrust bearing assembly is used between a downhole fluid motor and a rock bit for drilling oil wells. The bearing assembly has a stationary housing with radial journal bearing sleeves and a rotatable drive shaft also having radial bearing sleeves. A pair of oppositely facing thrust b ...


3
David R Hall: Rock bit with diamond tip inserts. Smith International, Christie Parker & Hale, September 22, 1987: US04694918 (231 worldwide citation)

A percussion rock bit comprises a steel body having means for connection to a drill string at one end and having a plurality of inserts at the other end for crushing rock at the bottom of a hole being drilled. The inserts have a cemented tungsten carbide body partially embedded in the steel bit and ...


4
William J Salesky, Bruce L Campbell: Rock bits and inserts therefor. Smith International, Willian Brinks Olds Hofer Gilson & Lione, March 14, 1989: US04811801 (229 worldwide citation)

The present invention is a rock bit insert including a polycrystalline diamond surface on an insert body having a head portion made from a material with elasticity and thermal expansion properties advantageously tailored for use in three types of rock bits, as well as the three types of rock bits ma ...


5
Patrick E Dailey, Charles D Barron, Louis H Rorden: Short hop communication link for downhole MWD system. Smith International, Develco, William E Shull, Michael F Heim, C Michael Zimmerman, November 3, 1992: US05160925 (221 worldwide citation)

The short hop communication link includes a sensor module positioned downhole from a motor in a well. The module includes sensors that monitor operational, directional and environmental parameters downhole and provide an electrical data signal indicative thereof. Sensors may also be positioned in th ...


6
David R Hall, Donald G Cross: Polycrystalline diamond bearing system for a roller cone rock bit. Smith International, Willian Brinks Olds Hofer Gilson & Lione, April 19, 1988: US04738322 (211 worldwide citation)

A roller cone rock bit is disclosed with an improved bearing system. The improvement comprises a main journal bearing which is substantially frustoconically shaped and a main roller cone bearing which is reverse shaped to mate with the journal bearing. The journal and roller cone bearings comprise p ...


7
Charles H Dewey, Wei Xu: Expandable underreamer/stabilizer. Smith International, Conley Rose P C, May 11, 2004: US06732817 (200 worldwide citation)

A downhole tool that functions as an underreamer, or alternatively, as a stabilizer in an underreamed borehole. The tool includes one or more moveable arms disposed within a body having a flowbore therethrough in fluid communication with the wellbore annulus. The tool alternates between collapsed an ...


8
Madapusi K Keshavan, Monte E Russell, Dah Ben Liang: Drill bit inserts enhanced with polycrystalline diamond. Smith International, Christie Parker & Hale, December 6, 1994: US05370195 (183 worldwide citation)

A drill bit has means at one end for connecting the bit to a drill string and a plurality of inserts at the other end for crushing the rock to be drilled. The inserts have a cemented tungsten carbide body partially embedded in the drill bit and at least two layers at the protruding drilling portion ...


9
David Truax, Timothy P Beaton: Asymmetric diamond impregnated drill bit. Smith International, Rosenthal & Osha L, November 5, 2002: US06474425 (153 worldwide citation)

A drill bit including a bit body and a plurality of blades formed in the bit body. The blades are formed, at least in part, from a base matrix material that on one embodiment is impregnated with abrasive particles. One side of the bit is formed, with respect to its axis of rotation, to a smaller rad ...


10
Sujian Huang, Chris E Cawthorne: Centered-leg roller cone drill bit. Smith International, Rosenthal & Osha L, August 27, 2002: US06439326 (139 worldwide citation)

A drill bit including a roller cone and fixed cutters positioned external to the roller cone and radially from the bit axis of rotation. The roller cone is located so that a drill diameter of the cone is substantially concentric with an axis of rotation of the bit. The fixed cutters can be made of t ...



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