SCREW GEROTOR MOTOR TWIST ANGLE REGULATOR Russian patent published in 2012 - IPC E21B4/02 E21B7/08 

FIELD: engines and pumps.

SUBSTANCE: proposed regulator comprises hollow curved shaft with outer splines and first and second threads on its edges, toothed coupling with inner lengthwise splined slots and teeth on end face fitted on said outer lengthwise splines of said hollow curved shaft, straight and curved tubular misaligned adapters. Note here that teeth are made on curved tubular adapter end face to engage with those on toothed coupling end face. Note also that straight and curved tubular adapters are coupled with hollows curved shaft by threads made on opposite edges. Note that tubular adapter serves for coupling with screw gerotor motor housing thread. Note also that curved tubular adapter serves for coupling with spindle case thread. Spindle case accommodates shaft with well drill bit, while thread central lengthwise axes of straight and curved tubular adapters intersect with central lengthwise axes of curved adapter in two points. Point of hollow curved shaft second thread central lengthwise axis intersection in coupling with tubular curved adapter and central lengthwise axis of tubular curved adapter thread for coupling with spindle case thread is located on central axis of hollow shaft second thread at distance L from hollow curved shaft end face on the side of tubular curved adapter. Said distance is related to hollow curved shaft ID by the following relation: L=(0.25…0.65)D.

EFFECT: higher moment of resistance, transmitted torque, longer life and higher reliability.

5 dwg