Drilling apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy

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Details

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

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