Direct drive bit for deep well drilling tools

Details Direct drive bit for deep well drilling tools Direct drive bit for deep well drilling tools

E - Fixed Constructions

21

B

255/12

E21B 4/00 (2006.01) E21B 4/02 (2006.01) F03C 2/08 (2006.01) F04C 2/08 (2006.01) F04C 2/107 (2006.01)

Patent

CA 1177477

ABSTRACT In a Moineau type fluid motor one of the relatively rotatable elements is made of a deformable material and axial movement of tapered surfaces within the element, caused by variation in the fluid pressure causes adjustment of the sealing force in the motor in accordance with the fluid pressure level.

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