Thrust generator for boring tools

Details Thrust generator for boring tools Thrust generator for boring tools

1982-01-12

1984-03-13

Pate, III, William F.

Boring or penetrating the earth

With below-ground tool drive prime mover

With below-ground feed means

175107, 175104, 175 61, 173163, E21B 404

Patent

active

044361688

ABSTRACT:
The present invention provides an electrically powered system for advancing a rotary boring tool in situations where the inclination of the bore hole is such that the force of gravity does not provide sufficient forward thrust. One or more marine screw propellers are rotated by the motor which itself is restrained from rotation by being fixedly connected to a flexible, twist resistant conduit for conducting the drilling fluid and electric power from the surface. The system may also provide for different rotative speeds for propeller and bit and for counter-rotating propellers to minimize torque forces on the conduit.

REFERENCES:
patent: 2251916 (1941-08-01), Cross
patent: 3181631 (1965-05-01), Nielsen
patent: 3389758 (1968-06-01), Buhler
patent: 3873156 (1975-03-01), Jacoby
patent: 4031971 (1977-06-01), Miller

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