Locking clutch for downhole motor

Details Locking clutch for downhole motor Locking clutch for downhole motor

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) F03B 13/02 (2006.01)

Patent

CA 2737298

A locking clutch to selectively transmit torque from a stator of a downhole tool to a rotor of the downhole tool includes at least one locking pawl disposed upon the rotor, wherein the at least one locking pawl comprises a load path, at least one pivot axis, and a mass center, wherein the at least one locking pawl is biased into an engaged position by a biasing mechanism, wherein the at least one locking pawl transmits force from the stator to the rotor along the load path when in the engaged position, and wherein centrifugal force urges the at least one locking pawl into a disengaged position when the rotor is rotated above a disengagement speed.

Un embrayage de verrouillage pour transmettre sélectivement le couple dun stator dun outil de forage à un rotor de loutil de forage comprend au moins un cliquet de verrouillage disposé sur le rotor, ledit ou lesdits cliquets de verrouillage comprenant un chemin de charge, au moins un axe de pivotement, et un centre de masse, ledit ou lesdits cliquets de verrouillage étant sollicités dans une position de prise par un mécanisme de sollicitation, ledit ou lesdits cliquets de verrouillage transmettant la force du stator au rotor, le long du chemin de charge dans la position de prise, et la force centrifuge poussant ledit ou lesdits cliquets de verrouillage dans une position dégagée quand le rotor tourne au-dessus dune vitesse de dégagement.

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