Downhole motor system

Details Downhole motor system Downhole motor system

1995-06-01

1996-05-21

Vrablik, John J.

Rotary expansible chamber devices

Multistage

Sliding abutment

418124, 418179, 418188, 418225, 418249, 175107, 166312, F01C 1356, F01C 1904, E21B 402, E21B 2100

Patent

active

055183794

ABSTRACT:
A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an exhaust port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a tubular rotor movably disposed within the stator for rotation therein, the tubular rotor having a central motive fluid flow channel therethrough and extending along the length of the rotor, the rotor having one or more radial flow channels therethrough for providing a motive fluid flow path from the central motive fluid flow channel to at least one action chamber between the hollow tubular stator and tubular rotor; the tubular rotor having at least one rotor seal; and the at least one action chamber defined by an interior surface of the hollow tubular stator and an exterior surface of the tubular rotor, each of the at least one action chamber sealed at one end by the rod and at another end by one of the at least one rotor seals. A rotor has been developed with a central motive fluid flow channel and one or more radial flow channels interconnected therewith for fluid to flow to action chambers, e.g. action chambers between the rotor and a stator of a drilling motor.

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"New Directions in Down-Hole Drilling," Robbins & Myers, one page, prior to 1993.
"Vari-Flo Motir," Volker Stevin Offshore (U.K.) Ltd., two pages, prior to 1993.
"The Vari-Flo Motor: A New Mud Motor Concept, its Design, Development and Applications," Susman, 6 pages, 1992.

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