Method for nesting multiple concentric pipes

Details Method for nesting multiple concentric pipes Method for nesting multiple concentric pipes

1997-06-06

1999-12-21

Hook, James F.

Pipes and tubular conduits

Plural duct

Surrounding radially spaced duct with axially spaced...

138114, F16L 919

Patent

active

060035609

ABSTRACT:
The front end of the outer pipe 21 of the nested pipes 2 is sealed off, an auxiliary pipe 3 is joined so as to be detachable onto the tail end of the outer pipe 21, and a thrusting device 4 is mounted onto the auxiliary pipe 3. The nested pipes 2 are filled with a filler fluid 28, then as the thrusting device 4 generates pressure on the filler fluid 28, the nested pipes 2 are inserted into the existing pipe 1.

REFERENCES:
patent: 4253792 (1981-03-01), Nishikawa
patent: 4310281 (1982-01-01), Egashira
patent: 4662606 (1987-05-01), Akesaka
patent: 4796673 (1989-01-01), Ueda
patent: 4815695 (1989-03-01), Akesaka
patent: 4830538 (1989-05-01), Ueda
patent: 4830539 (1989-05-01), Akesaka
patent: 5887627 (1999-03-01), Ueda

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