Composite stator construction for downhole drilling motors

Details Composite stator construction for downhole drilling motors Composite stator construction for downhole drilling motors

1992-03-04

1992-12-15

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418 83, 418153, 418178, F01C 110, F01C 502, F01C 504, F03C 208

Patent

active

051711389

ABSTRACT:
A composite stator construction for a downhole drilling motor which provides improved sealing and distortion properties. The elastomer which maintains the sealing/pumping action of the motor is applied in a uniform thickness to a rigid metallic form. In the stator, the rigid former has the basic configuration of the stator and is mounted within the casing of the motor. In the rotor, the elastomer can be applied directly to a metallic rotor core. The basic geometry is provided by the metallic former thereby reduces distortion of the lobes under increased torsional forces.

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