Rock drilling method

Details Rock drilling method Rock drilling method

1980-04-22

1982-07-27

Pate, III, William F.

Boring or penetrating the earth

Automatic control

173 1, 173 2, 173105, E21B 600

Patent

active

043412718

ABSTRACT:
A rock drilling method according to which the drill is subjected to successive axial strikes and is rotated around its longitudinal axis. The direction of rotation is repeatedly reversed after the drill has rotated at least one revolution in one direction.

REFERENCES:
patent: 2552840 (1951-05-01), Burke et al.
patent: 3307638 (1977-03-01), Kurt
patent: 4147219 (1979-04-01), Wallace

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