Process and apparatus for laying service lines without excavatio

Details Process and apparatus for laying service lines without excavatio Process and apparatus for laying service lines without excavatio

1989-06-06

1992-03-17

Melius, Terry Lee

Boring or penetrating the earth

Boring without earth removal

Drive point detached from shaft to form cased bore or with...

175 95, 175171, 175296, 405184, E21B 414, E21B 726

Patent

active

050960008

ABSTRACT:
In a process for laying underground service lines without excavation by means of a ram boring machine, old pipe lines already buried underground are replaced by new service lines without having to tear up the ground or destroy the old pipe line. To enable the new line to be laid accurately in position and to be accurately targeted the ram boring machine is provided with a guiding bore passing axially through the casing and is guided on the old line.

REFERENCES:
patent: 3805899 (1974-04-01), Hicks et al.
patent: 4091631 (1978-05-01), Cherrington
patent: 4422800 (1983-12-01), Parish
patent: 4662457 (1987-05-01), Bouplon

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