In-hole motor drill with locking bit clutch

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

1979-08-20

1981-03-03

Pate, III, William F.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

E21B 402

Patent

active

042535328

ABSTRACT:
An in-hole motor drill assembly has the rotor of the motor which may be connected to the drill bit through a shaft connected to the rotor, and a housing which may be connected to the running string, and normally disengaged torque transmitting members between said housing and said shaft. Means are provided for engaging said shaft and said housing for mutual rotation by exerting a negative force on said housing, if the bit is stuck. The shaft can be rotated by rotation of the housing in either direction when mounted in a well and the housing connected to a drill string and the shaft connected to a bit. In normal operation, during drilling, the housing is disengaged to permit the shaft to rotate relative to the housing.

REFERENCES:
patent: 4135772 (1979-01-01), Stodt
patent: 4187918 (1980-07-01), Clark

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