Directional self-propelled drill

Details Directional self-propelled drill Directional self-propelled drill

1996-06-25

1997-12-16

Tsay, Frank

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

175106, E21B 402

Patent

active

056974590

ABSTRACT:
A self-propelled drill for drilling a bore or cleaning a pipe in straight and/or curved paths. The drill includes a piston having a working head which slides within a housing. A rotary piston driving mechanism featuring an endless groove converts longitudinal motion of the piston to a combined longitudinal and rotary movement of the working head. A housing gripping device fixes the drill to the wall of the bore to allow drilling while a working head gripping device fixes the working head to the walls of the bore to allow the drill to be periodically pulled forward.

REFERENCES:
patent: 3792741 (1974-02-01), Hopler, Jr.
patent: 4126193 (1978-11-01), Brown et al.
patent: 4314615 (1982-02-01), Sodder, Jr. et al.
patent: 4359109 (1982-11-01), Truong-Cao
patent: 4463814 (1984-08-01), Horstmeyer et al.
patent: 4727763 (1988-03-01), Georget

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