Locking clutch for downhole motor

Details Locking clutch for downhole motor Locking clutch for downhole motor

2007-04-30

2010-06-15

Bagnell, David J (Department: 3676)

Boring or penetrating the earth

With below-ground tool drive prime mover

With positive connection between tool and support shaft for...

C192S046000

Reexamination Certificate

active

07735581

ABSTRACT:
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. The at least one locking pawl comprises a load path, a pivot axis, and a mass center, and is biased into an engaged position by a biasing mechanism. The at least one locking pawl transmits force from the stator to the rotor along the load path when in the engaged position, and centrifugal force urges the at least one locking pawl into a disengaged position when the rotor is rotated above a disengagement speed.

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Office Action issued in related Canadian Application No. 2,630,068; dated Feb. 23, 2010 (4 pages).
EPO Communication dated Mar. 30, 2010 in corresponding EP application # 08155183.0 regarding third party observations, 5 pages.

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