Activated earth drill

Details Activated earth drill Activated earth drill

1987-04-14

1989-01-10

Dang, Hoang C.

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

175101, 175104, 175106, 175343, 175365, 175376, E21B 404, E21B 416

Patent

active

047967137

ABSTRACT:
The invention relates to a drill bit which includes a drive arrangement having two opposed drive shafts which are transverse to the drill rod axis, mechanism for driving the shafts and a rock comminuting cutter which is eccentrically mounted on each of the shafts.

REFERENCES:
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patent: 2903242 (1959-09-01), Bodine, Jr.
patent: 3285351 (1966-11-01), Caro
patent: 3369618 (1968-02-01), Moore
patent: 3771611 (1973-11-01), Omura et al.
patent: 4185703 (1980-01-01), Guerber
patent: 4610317 (1986-09-01), England et al.
patent: 4682660 (1987-07-01), Barthelemy et al.
patent: 4694915 (1987-09-01), Bauer et al.
patent: 4736987 (1988-04-01), Lenzen et al.

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