Method and device to remove pipe

Details Method and device to remove pipe Method and device to remove pipe

2007-01-26

2011-11-22

Wilson, Lee D (Department: 3727)

Metal working

Means to assemble or disassemble

Means comprising hand manipulatable tool

C029S255000

Reexamination Certificate

active

08061001

ABSTRACT:
A pipe removal method includes navigating a flexible element through a first pipe. At least a portion of the flexible element is coupled with the first pipe. The flexible element and the first pipe are pulled as a composite assembly, and the flexible element reinforces the tensile strength of the first pipe. In one example, the first pipe is at least pulled in compression between the point of coupling between the flexible element and the first pipe and a proximal end of the flexile element. In another example, the method includes wrapping the composite assembly around a spool. The composite assembly is thereby removed from the ground surrounding the first pipe.

REFERENCES:
patent: 4568036 (1986-02-01), Kearney
patent: 5388781 (1995-02-01), Sauber
patent: 5607143 (1997-03-01), Regal
patent: 6672802 (2004-01-01), Putnam
patent: 6799923 (2004-10-01), Carter et al.
patent: 7731471 (2010-06-01), Voegeli et al.
patent: 2006/0099035 (2006-05-01), Wentworth

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