Method of installing re-placement pipe

Details Method of installing re-placement pipe Method of installing re-placement pipe

1998-10-29

2000-07-25

Brinson, Patrick

Pipes and tubular conduits

Repairing

138 98, 405154, 30 925, F16L 5516

Patent

active

060925531

ABSTRACT:
The invention provides that an existing underground pipe (52) is replaced by pulling a cutting device (10) through the existing pipe (52) by means of a strong steel stranded cable, and at the same time pulling the replacement pipe (26) along behind the cutting device (10). The invention, which has particular application in the replacement of small diameter pipes (52), provides that the method is made practical by paring down the cable (30) over a length (90) to provide a pilot section (90) which can be fed through the existing pipe (52) easier that the full diameter cable (30) and be paring down the strands of the cable (30), no joint [which could end up of a size larger than the diameter of the cable (30)] is needed.

REFERENCES:
patent: 4505302 (1985-03-01), Streatfield et al.
patent: 4738565 (1988-04-01), Streatfield et al.
patent: 5078546 (1992-01-01), Fisk et al.
patent: 5098225 (1992-03-01), Rockower et al.
patent: 5171106 (1992-12-01), Rockower et al.
patent: 5173009 (1992-12-01), Moriarty
patent: 5302053 (1994-04-01), Moriarty
patent: 5653554 (1997-08-01), Preston et al.

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