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Dave D Nagel, Thomas Aparicio Jr: Well drilling tool with diamond radial/thrust bearings. Maurer Engineering, Neal J Mosely, October 18, 1983: US04410054 (247 worldwide citation)

A turbodrill is disclosed for connection to a drill string and has a rotating shaft for turning a drill bit. The turbodrill has rotor and stator blades operated by drilling mud flowing therethrough to rotate the shaft. The shaft is provided with radial/thrust bearing consisting of a pair of annular ...


2
Dave D Nagel: Manufacture of diamond bearings. Maurer Engineering, Neal J Mosely, August 28, 1984: US04468138 (223 worldwide citation)

In the manufacture of diamond bearings consisting of a supporting plate/ring having a plurality of recesses equally spaced therearound with insert members consisting of hardmetal or carbide studs, with planar faces of polycrystalline diamond, positioned therein, the diamond bearing faces are made co ...


3
Dave D Nagel: Well drilling tool with diamond thrust bearings. Maurer Engineering, Neal J Mosley, November 4, 1986: US04620601 (63 worldwide citation)

A turbodrill is disclosed which is connected to a string of drill pipe as a rotating shaft for driving a drill bit which may be a rotary bit or a high speed solid head diamond bit. The turbine section of the turbodrill has rotor and stator blades which are cresent shaped in cross section and are ope ...


4
Dave D Nagel: Downhole drilling motor with pressure balanced bearing seals. Maurer Engineering, Neal J Mosely, April 13, 1982: US04324299 (26 worldwide citation)

A downhole drilling motor, e.g. a turbodrill, which is connected to a string of drill pipe has a rotating shaft for driving a drill bit which may be a rotary bit or a high speed solid head diamond bit. The turbine section has rotor and stator blades which are crescent shaped in cross section for max ...


5
Thomas Aparicio Jr, Dave D Nagel, Ron Graham: Powered ratchet wrench. Gratec, Neal J Mosely, November 6, 1984: US04480510 (19 worldwide citation)

A powered ratchet wrench for turning threaded members, such as nuts or bolt heads, consists of a wrench assembly having a reaction arm adapted to be positioned over a threaded member, viz. nut or bolt, for supporting the same and operating a socket wrench through a ratchet mechanism applying a torqu ...


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