Horizontal boring apparatus used to install a pipeline
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 4, 2000
Issued Date -
N/A
app pub date -
Nov 8, 1999
filing date -
May 13, 1997
priority date (Note) -
Expired
status (Latency Note)
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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.
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