Horizontal earth bore tool

Details Horizontal earth bore tool Horizontal earth bore tool

1993-03-01

1994-04-19

Dang, Hoang C.

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

175 62, 175 85, 175122, 175162, 175203, 175220, 254 29R, E21B 1504, E21B 300, E21B 1900

Patent

active

053037839

ABSTRACT:
The rig has a base frame, with powered ground screw anchors, trunnion attached to a tiltable top frame equipped with pipe handling rollers, pipe clamp, power tongs, and crosshead mounted swivel arranged to slide along the frame to transfer axial forces to a drill string situated parallel to and centered above the top frame. The swivel is plumbed to deliver drilling fluids to the drill string. Remote power sources provide drilling fluid processing and hydraulic power to the various controls to operate; a tilt mechanism to tilt the top frame to align with a well bore, power tongs, to move the crosshead, rotate the ground screws, a pipe stabbing roller and a pipe cradle to move pipe sections into and out of the rig working center. Operator cab stations are positioned along the top frame and are bearing mounted to stay vertical when the top frame is tilted.

REFERENCES:
patent: 4043136 (1977-08-01), Cherrington
patent: 4249620 (1981-02-01), Schmidt
patent: 4453603 (1984-06-01), Voss et al.
patent: 4547109 (1985-10-01), Young et al.
patent: 4595065 (1986-06-01), Wada et al.
patent: 4703811 (1987-11-01), Lam
patent: 4953638 (1990-09-01), Dunn

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