Directional boring head

Details Directional boring head Directional boring head

1992-05-08

1993-10-19

Bui, Thuy M.

Boring or penetrating the earth

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

E21B 708

Patent

active

052537218

ABSTRACT:
A steerable drill head which utilizes the combination of a hydraulic cutting nozzle and a rotary mechanical cutting blade wherein the drill string is intermittently rotated and lineally advanced in the bore. The drill head further includes a ramp attached to the head behind the cutting blade including a steering surface for deflecting the drill head and its string in a particular direction by linear advancement without rotation. The cutting blade is positioned at the center of the head with the plane of the blade positioned on the axis of rotation of the drill head.

REFERENCES:
patent: 3794128 (1974-02-01), Gagen et al.
patent: 5131479 (1992-07-01), Boulet et al.
patent: 5148880 (1992-09-01), Lee et al.

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