Earth drilling mechanisms

Details Earth drilling mechanisms Earth drilling mechanisms

1975-11-14

1976-09-07

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

With below-ground feed means

175 99, 175230, E21B 312, E21C 1900

Patent

active

039789306

ABSTRACT:
An apparatus of the type used in forming boreholes in earth formations, as particularly utilized in and about mining operations, which includes the addition of thrust force accumulator structure which enables a continuous drilling progression during the cyclical actuation of alternating borehole anchor mechanism. The device utilizes a conventional form of drill motor and drill bit coupled with a particular form of piston/cylinder anchor mechanism which functions in coaction with a force accumulator compression spring.

REFERENCES:
patent: 3180437 (1965-04-01), Kellner et al.
patent: 3827512 (1974-08-01), Edmond

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