Helicopter portable earth drilling apparatus

Details Helicopter portable earth drilling apparatus Helicopter portable earth drilling apparatus

1978-08-15

1980-03-11

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

With above-ground means

60718, 173160, E21B 108, E21B 500

Patent

active

041923936

ABSTRACT:
A portable earth drilling apparatus adapted for helicopter transportation has been designed in light modular form and particularly adapted for use at high elevations under circumstances where prior art drill rigs are not capable of efficient operation.

REFERENCES:
patent: 2842340 (1958-07-01), Burness
patent: 3047080 (1962-07-01), Gunther, Jr.
patent: 3061023 (1962-10-01), Samhammer, Jr.
patent: 3273658 (1966-09-01), Ytterfors et al.
patent: 3568779 (1971-03-01), Cannon
patent: 3825075 (1974-07-01), Mee
patent: 3981485 (1976-09-01), Eddy et al.

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