Direction controllable subsurface borehole tool

Details Direction controllable subsurface borehole tool Direction controllable subsurface borehole tool

1994-08-08

1995-06-13

Britts, Ramon S.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Sectional guide or shaft having means to lock sections in...

175 79, E21B 706

Patent

active

054233887

ABSTRACT:
A drilling head for making a borehole along a predetermined underground path is formed by a tubular body having a guidable rotary drilling sub normally axially mounted in the body by means of a sleeve bearing journalling a drill bit equipped rotary drilling string sub joint moveable with and within the sleeve for disposing the drilling bit on a predetermined angle in a predetermined direction relative to the longitudinal axis of the body by means of diametrically opposite superposed pairs of wedges interposed between respective end portions of the sleeve bearing and the inner periphery of the body.

REFERENCES:
patent: 1636032 (1927-07-01), Abbott
patent: 2492794 (1949-12-01), Goble et al.
patent: 3961674 (1976-06-01), Craig, Jr. et al.
patent: 4076084 (1978-02-01), Tighe
patent: 4453603 (1984-06-01), Voss et al.
patent: 4993503 (1991-02-01), Fischer et al.
patent: 5002138 (1991-03-01), Smet
patent: 5052502 (1991-10-01), Jurgen et al.
patent: 5078218 (1992-01-01), Smet

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