Moineau motor with conduits through the stator

Details Moineau motor with conduits through the stator Moineau motor with conduits through the stator

1991-11-26

1992-12-15

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418 83, 418153, 418181, 29888, F03C 208

Patent

active

051711397

ABSTRACT:
A progressive cavity drilling motor is disclosed with a multiplicity of helically formed conduits positioned in a resilient stator. The conduits are placed between an inner wall of a motor casing and a helically formed through hole formed by the stator. The conduits are located in parallel with each of the semi circular lobes thereby reducing the thickness of the elastomer in the lobe area resulting in a reduction of the hysteresis in the elastomer that is caused by cyclic stress reversals of the stator during motor operation. The conduits additionally divert a portion of the drilling fluid through the stator conducting heat therefrom. In addition, one or more of the conduits may be utilized as a communication channel therethrough for measurement while drilling capabilities.

REFERENCES:
patent: 2085115 (1937-06-01), Moineau
patent: 3139035 (1964-06-01), O'Connor
patent: 3840080 (1974-10-01), Berryman
patent: 3982858 (1976-09-01), Tschirky
patent: 4059165 (1977-11-01), Clark
patent: 4211521 (1980-07-01), Streicher
patent: 4646856 (1987-03-01), Dismukes
patent: 4721172 (1988-01-01), Brett et al.

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