Method for extracting underground pipe

Details Method for extracting underground pipe Method for extracting underground pipe

2006-10-31

2006-10-31

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

C138S097000

Reexamination Certificate

active

07128499

ABSTRACT:
A method for the removal of a ductile pipe includes passing a strand through the ductile pipe, crimping the ductile pipe in at least one location so that it is secured in a crimp about the strand and pulling the strand from an end of the ductile pipe with a winch or hydraulic puller. Preferably, the strand is a solid wire or wire rope and may be pushed through the pipe with a power wire feeding apparatus. As the strand and ductile pipe are pulled, segments of the pipe and strand are cut at the end of the pipe proximate the winch or puller.

REFERENCES:
patent: 4637756 (1987-01-01), Boles
patent: 5439320 (1995-08-01), Abrams
patent: 6171026 (2001-01-01), Crane et al.
patent: 6655874 (2003-12-01), Crane et al.
patent: 6793442 (2004-09-01), Carter et al.
patent: 6854932 (2005-02-01), Putnam
patent: 7025536 (2006-04-01), Putnam
patent: 7032429 (2006-04-01), McDougle
National Telephone Supply Company, “Manufacturers of Genuine Nicopress products,” www.nicopress.com, Apr. 11, 2005, 2 pages.

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