Abstract: 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 torque for tightening or loosening the nuts or bolts. The wrench assembly has a box shaped housing with an open end portion supporting a ratchet mechanism and a double-acting fluid operated cylinder having an operating piston extending therefrom for operating the ratchet mechanism. The ratchet mechanism consists of a ratchet wheel supported between two plates on bearing sleeves extending from side to side at the open end portion of the housing. A pair of pawls with driving teeth engage opposite sides of the ratchet wheel and are spring biased toward engagement with the ratchet teeth. The pawls are pivotally supported on each other and on the ratchet wheel supporting plates.

Abstract: An adjustable powered wrench for turning threaded members consists of a wrench adapted to be positioned over a threaded member, viz. nut or bolt, for applying a torque for tightening or loosening the same. The wrench has an operating arm for transmission of power, preferably having a head with teeth forming an arcuate rack. A fluid operated cylinder has an operating piston extending therefrom which is operatively connected to a pawl with teeth which mate with the rack teeth on the head of the wrench operating arm. A first reaction arm is provided having one end with a pivotal connection thereon, e.g. ring, adapted to fit over one of the threaded members for support and having an opposite end pivotally connected to the cylinder for supporting the same. An adjustable anchor member consists of a second reaction arm having one end with a pivotal connection, e.g. ring, adapted to fit over another one of said threaded members for support.

Abstract: 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 plates, each of which has conical surfaces supporting a plurality of friction bearing members of polycrystalline diamond. The radial and thrust loads are carried by the wear-resistant diamond bearing surfaces. The bearing members are preferably cylindrical studs having flat faces with flat disc-shaped diamond bearing members supported thereon around the adjacent surfaces of the supporting plates. The faces of the diamond bearings will wear into smoothly mating conical bearing surfaces with use. There are two or more pairs of diamond radial/thrust bearings to handle longitudinal as well as radial loads.