In-hole motor drill with bit clutch

Details In-hole motor drill with bit clutch In-hole motor drill with bit clutch

1978-11-02

1980-11-11

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

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

166237, 175107, E21B 400

Patent

active

042327512

ABSTRACT:
An in-hole motor drill assembly has the rotor of the motor connected to the drill bit by a slidable rotary drive connection, and normally disengaged torque transmitting members are engageable, if desired, to lock the bit and motor housing together for rotation of the bit by rotation of the motor housing. The torque transmitting members also interlock to prevent disengagement when an upward pull is applied during rotation of the bit.

REFERENCES:
patent: 3894818 (1975-07-01), Tschirky
patent: 3989409 (1976-11-01), Ioannesian
patent: 4080094 (1978-03-01), Jeter

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