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David R Hall, Joe Fox: Link module for a downhole drilling network. IntelliServ, Tyson J Wilde, Jeffrery E Daly, May 29, 2007: US07224288 (33 worldwide citation)

A repeater is disclosed in one embodiment of the present invention as including a cylindrical housing, characterized by a proximal end and a distal end, and having a substantially cylindrical wall, the cylindrical wall defining a central bore passing therethrough. The cylindrical housing is formed t ...


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David R Hall: Inserts having two components anchored together at a non-perpendicular angle of attachment for use in rotary type drag bits. Megadiamond, Neuman Williams Anderson & Olson, July 16, 1985: US04529048 (33 worldwide citation)

An insert for a rotary type drag bit having two anchored components, an engaging element and a shank, is disclosed. The components are positioned into each other in interfitting relationship with the mating surfaces of the two components being at a non-perpendicular angle to a plane parallel to the ...


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David R Hall: Means for detecting subterranean formations and monitoring the operation of a down-hole fluid driven percussive piston. April 9, 2002: US06367565 (33 worldwide citation)

A method of creating an electric signal that describes the motion of a down-hole, fluid-driven percussive tool is disclosed. The signal is obtained by attaching an electromagnetic transducer to the percussive tool, the member impacted by it, or the drill string. The rebound characteristics of the to ...


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David R Hall, Tyson J Wilde, Jad A Mills: Lubricating drum. Tyson J Wilde, June 17, 2008: US07387345 (32 worldwide citation)

In one aspect of the invention a degradation drum comprises a generally cylindrical body comprising inner and outer diameters. At least one degradation assembly is disposed on the outer diameter and it comprises a holder and a pick shank secured within a bore of the holder. At least one lubricant re ...


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David R Hall: Reduced mass unitary frame for ultra high-pressure high-temperature press apparatus. January 8, 2002: US06336802 (29 worldwide citation)

A reduced mass unitary frame having a cubic, spherical, prismatic, or ellipsoidal shape, a plurality of intersecting threaded boreholes that describe an spherical internal reaction chamber, and a plurality of unitary cartridges with internal fluid intensification for an ultra-high pressure, high-tem ...


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David R Hall, Ronald Crockett, Jacob S Waldron, Joe Fox: Assembly for HPHT processing. Tyson J Wilde, August 18, 2009: US07575425 (28 worldwide citation)

An improved assembly for HPHT processing having a can with an opening and a mixture disposed within the opening. A sealant barrier is positioned atop the mixture. First and second lids are positioned atop the mixture. A meltable sealant positioned intermediate the second lid and a cap covering the o ...


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David R Hall, Ronald Crockett, Jeff Jepson: Attack tool. Tyson J Wilde, June 10, 2008: US07384105 (27 worldwide citation)

In one aspect of the invention, an attack tool is disclosed which has a wear-resistant base suitable for attachment to a driving mechanism, a first cemented metal carbide segment brazed to the base at a first interface, and a second metal carbide segment brazed to the first carbide segment at a seco ...


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David R Hall, Jim Shumway: System for steering a drill string. Tyson J Wilde, Benjamin T Miskin, October 13, 2009: US07600586 (27 worldwide citation)

A downhole tool string component, having a first rotor secured within a bore of the component and connected to a gear assembly, the gear assembly being connected to a second rotor. The gear assembly has a gear ratio adapted to rotate the second rotor faster than the first rotor. The second rotor is ...