Drill steering apparatus

Details Drill steering apparatus Drill steering apparatus

1985-11-22

1987-01-13

Leppink, James A.

Boring or penetrating the earth

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

Axially spaced opposed bore wall engaging guides

175325, E12B 708

Patent

active

046357360

ABSTRACT:
An improved well drilling steering tool including a tubular body, an upper stabilizer mounted on the tubular body with a means contained therein for sensing the low side of the well bore and for transmitting hydraulic signals responsive thereto, valving means connected in the tubular body to control the end location for the hydraulic signals from the sensing means, a lower stabilizer mounted on the tubular body close to the drill bit and having means for exerting a transverse thrust to the tubular body responsive to the hydraulic signals received from the sensing means and the valving means, the upper and lower stabilizers are supported on the tubular body by upper and lower floating rings and retaining rings which cause the stabilizers to rotate with the tubular body and allow relative radial movement between the stabilizers and the tubular body and the stabilizers and their mounting rings include passages therebetween to prevent the build-up of materials within the stabilizers which would interfere with their operation.

REFERENCES:
patent: 3916998 (1975-11-01), Bass, Jr. et al.
patent: 4071101 (1978-01-01), Ford
patent: 4101179 (1978-07-01), Barron
patent: 4220213 (1980-09-01), Hamilton
patent: 4394881 (1983-07-01), Shirley

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