Horizontal boring apparatus used to install a pipeline

Details Horizontal boring apparatus used to install a pipeline Horizontal boring apparatus used to install a pipeline

1999-11-08

2000-07-04

Lillis, Eileen Dunn

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

405184, 175108, F16L 100, E21B 728

Patent

active

060824719

ABSTRACT:
A boring head is provided for use in mounting to a drill pipe of a drilling rig for enlarging a pilot bore in horizontal boring operations. The boring head has an axial member positioned along a central axis of the boring head for connecting the boring head to the drill pipe of the drilling rig. A plurality of flanges extend radially from the axial member, and a flange support frame is provided for structurally interconnecting and supporting the flanges on the axial member. A plurality of cutting cones are mounted to the boring head. In particular, each of the cutting cones has a cone axis, each of the cutting cones is mounted to one of the flanges such that its cone axis extends at an acute angle ranging from zero degrees up to about 45 degrees relative to the central axis; each of the cutting cones is mounted for independent rotation about its cone axis; and each of the cutting cones has a plurality of independently rotatable cutting bits mounted thereto. According to a further aspect of the invention, the cutting cones are arranged and positioned on the boring head to improve the cutting operation. In addition, a method of horizontally drilling for installing a pipeline beneath a barrier is provided.

REFERENCES:
patent: Re32267 (1986-10-01), Cherrington
patent: 3331454 (1967-07-01), Conrad
patent: 3837413 (1974-09-01), Dunn
patent: 4410053 (1983-10-01), Masse
patent: 5314267 (1994-05-01), Osadchuk
patent: 5628585 (1997-05-01), Parrish, II et al.

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