FIELD: oil and gas industry.
SUBSTANCE: locking clutch for selective transfer of torque from stator of downhole tool to rotor of downhole tool, which contains at least one locking ratchet of ratchet-and-pawl mechanism, which is located on rotor, which includes loading way, at least one rotation axis and centre of masses, has the possibility of being deviated to coupled position with the displacing mechanism and transfers the force from stator and to rotor along loading way, when it is in coupled position, and centrifugal force presses it to uncoupled position when rotor rotates at the speed that is higher than uncoupling speed.
EFFECT: preventing seizure and release of seized drilling bit.
22 cl, 11 dwg
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Authors
Dates
2013-01-10—Published
2008-09-10—Filed