Fluid powered linear piston motor with harmonic coupling

DWPI Title: Electric motor i.e. positive displacement motor, for rotating drill bit of e.g. rotary drilling assembly for geothermal drilling application, has piston assembly whose axial motion is provided within housing to cause coupler to rotate rotor
Abstract: A motor is disclosed that includes a module assembly including a piston that is axially cycled. The piston axial motion is coupled to torque couplers that convert the axial motion into rotary motion. The torque couplers are coupled to a rotor to rotate the rotor.
Use: Electric motor i.e. positive displacement motor (PDM), for rotating a drill bit of a drilling assembly (claimed) e.g. downhole drilling assembly such as rotary drilling assembly and percussive drilling assembly, for deep earth penetration application e.g. oil and gas well drilling application and geothermal drilling application.
Advantage: The motor allows harmonic cams with an inside surface that is mated to an outside surface of a piston assembly body, thus preventing rotational movement between first and second harmonic cams and the piston assembly body.
Novelty: The motor has a piston drive section arranged within a motor housing, and comprising a rotor i.e. annular tube, and a module assembly arranged around the rotor. The module assembly comprises a piston assembly (820) having a first end and a second end. First and second torque couplers (830, 840) are coupled to the first and second ends of the piston assembly and the rotor, where axial motion of the piston assembly within the motor housing causes the first and second torque couplers to rotate the rotor. An exhaust manifold is placed within a rotor housing.
Filed: 3/13/2014
Application Number: US14209840A
Tech ID: SD 11482.2
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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