Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy
Patent
1986-06-23
1987-12-08
Novosad, Stephen J.
Boring or penetrating the earth
With below-ground tool drive prime mover
Below-ground storage of motivating energy
175321, E21B 402
Patent
active
047113090
ABSTRACT:
A drilling apparatus has a rotatable drilling rod (15) on the leading end of which is mounted a bit assembly including a bit (10) and a bit driver (12) for reciprocating the bit. The bit driver is powered by a high pressure fluid supplied from a fluid pressurizing apparatus interposed between the rod and bit assembly and including a device (16,18/114) for raising the pressure of fluid in a closed circuit into which said bit driver is connected, the said device being driven from a power source remote from it, for example, on the surface of the ground in which a hole is being drilled.
REFERENCES:
patent: 2313806 (1943-03-01), Crites
patent: 2635852 (1953-04-01), Snyder
patent: 3280923 (1966-10-01), Muench
Klat Samir R.
Knight Robert G.
Unwin Kenneth
Adams, III W. Thad
Neuder William P.
Novosad Stephen J.
Nytol Enterprises Limited
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