Method of and apparatus for repairing and sealing junctions betw

Details Method of and apparatus for repairing and sealing junctions betw Method of and apparatus for repairing and sealing junctions betw

1995-03-27

1997-03-11

Neuder, William P.

Hydraulic and earth engineering

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

156156, 264269, B63B 3503

Patent

active

056094396

ABSTRACT:
A faulty junction between a main pipe and an entering branch pipe is repaired and sealed by using a bladder which is carried between two bearing blocks. The bladder is prepared with a resin impregnated mat, which, when the bladder is pulled and turned into a position center to a pipe junction lines and seals the pipe junction upon application of a pressure medium to the bladder. Positioning of the bladder is performed under TV remote-control.

REFERENCES:
patent: 1348332 (1920-08-01), Stremel
patent: 2826784 (1958-03-01), Pratt
patent: 3642975 (1972-02-01), Duggins et al.
patent: 3937781 (1976-02-01), Allen
patent: 5066208 (1991-11-01), Warmerdam

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