Directional drilling apparatus

Details Directional drilling apparatus Directional drilling apparatus

1978-04-10

1979-05-08

Purser, Ernest R.

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

173 5, 173145, 175 79, E21B 306

Patent

active

041531191

ABSTRACT:
A device for facilitating directional drilling of small diameter holes radially of a mine long hole comprising a segmented sleeve for movement through a guide channel in a main drill unit. A small bit is driven by a flexible shaft which passes through the segmented sleeve. The segmented sleeve remains partially in the guide channel and extends partially out of the guide channel in a straight line from the guide channel. The segments are joined in a manner permitting a 90.degree. turn in the guide channel but allowing no curvature in the portion of the segmented sleeve extending from the guide channel.

REFERENCES:
patent: 1925012 (1933-08-01), Taylor
patent: 2118650 (1938-05-01), Lee
patent: 2388720 (1945-11-01), Wright
patent: 2516421 (1950-07-01), Robertson
patent: 2539047 (1951-01-01), Arutunoff
patent: 2644669 (1953-07-01), Curtis et al.
patent: 3958649 (1976-05-01), Bull et al.
patent: 4051908 (1977-10-01), Driver
patent: 4062412 (1977-12-01), McIlvanie

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