Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – With protection or indication of pipe or trench
Reexamination Certificate
2008-05-06
2008-05-06
Singh, Sunil (Department: 3672)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
With protection or indication of pipe or trench
C405S184000, C166S250010
Reexamination Certificate
active
11269447
ABSTRACT:
A method of installing a non metallic pipeline segment along with a tracer wire segment using a horizontal directional drilling process includes positioning a horizontal directional drilling machine in a selected position on one side of the obstacle. A drill bit is attached to an end of a flexible steel pipe. The flexible steel pipe engages and is driven by the horizontal directional drilling machine that forces the drill bit and the flexible pipe from the first side of the obstacle to a second side of the obstacle thereby drilling a bore underneath the obstacle. The drill bit is removed and a reamer is attached to the end of the flexible pipe. An end of a pipeline segment along with an end of a tracer wire segment having a high carbon steel core and a copper cladding with a high density polyethylene jacket is attached to the reamer. The drive of the horizontal directional drilling machine is reversed such that the reamer pulls the pipeline and the tracer wire back through the bore beneath the obstacle such that an end of the segment of the pipeline and an end of the segment of the tracer wire extends beyond the first surface of the obstacle.
REFERENCES:
patent: 2004/0184885 (2004-09-01), McGillis
patent: 2004/0222009 (2004-11-01), Blew et al.
patent: 2005/0191133 (2005-09-01), Purcell
Groebner Joseph Matthew
Pajak Daniel Edward
Andrish Sean D
Copperhead Industries LLC.
Singh Sunil
Westman, Champling & Kelly, P.A.
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