Downhole drilling motor

Details Downhole drilling motor Downhole drilling motor

E - Fixed Constructions

21

B

255/12

E21B 4/02 (2006.01) E21B 44/00 (2006.01)

Patent

CA 1330076

A B S T R A C T DOWNHOLE DRILLING MOTOR A downhole drilling motor comprises an output shaft which is allowed to translate in axial direction relative to the motor housing over a predetermined stroke. During operation of the motor fluid pressure of a drilling fluid pumped to a rotary drill bit driven by the motor may be used to exert a predetermined axial force to the output shaft so as to control the axial force exerted to the bit during drilling.

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