Progressive cavity pump/motor

Details Progressive cavity pump/motor Progressive cavity pump/motor

2005-04-19

2005-04-19

Vrablik, John J. (Department: 3748)

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

C418S153000, C418S178000

Reexamination Certificate

active

06881045

ABSTRACT:
A progressive cavity pump or motor, particularly suitable for hydrocarbon recovery operations, includes a rotor20and a stator10. Fluid pressure in cavities between the stator and the rotor create torque which rotates the bit. An interior surface of the stator is rigidly secured to the outer housing of the pump stator and defines an interior profile. A substantially uniform thickness elastomeric layer62is supported on the outer housing. The pump rotor has an exterior profile which corresponds with the interior profile of the elastomeric layer.

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