Method and apparatus of a self-aligning sleeve for the correctio

Details Method and apparatus of a self-aligning sleeve for the correctio Method and apparatus of a self-aligning sleeve for the correctio

1982-06-03

1985-02-26

Purser, Ernest R.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

E21B 4400

Patent

active

045013365

ABSTRACT:
A method and apparatus for correcting the direction of a deviated borehole having a self-aligning sleeve slideable over flexible members of the drill string assembly, which is non-rotating and substantially the same length as a flexible member of the drill string assembly, having two elliptical protrusions. There further is included a first protrusion means for centering and stabilizing the tool in the borehole. Also, a second pad-like protrusion means is included for guiding the drill bit and drill string assembly in the desired direction.

REFERENCES:
patent: 2712434 (1955-07-01), Giles et al.
patent: 3156310 (1964-11-01), Frisby
patent: 4185204 (1980-01-01), Nixon
"Prilco develops tool to steer bits", The Oil and Gas Journal, Sep. 28, 1964, p. 49.

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