Method and apparatus for refurbishing deficient pipes

Details Method and apparatus for refurbishing deficient pipes Method and apparatus for refurbishing deficient pipes

1988-03-16

1989-05-16

Taylor, Dennis L.

Hydraulic and earth engineering

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

Repair, replacement, or improvement

138 97, 2541344, 254 29R, 405154, 405146, F16L 100

Patent

active

048305383

ABSTRACT:
A refurbishing method for an existing pipeline under the sea or on the ground by inserting a rigid inner pipe having its front end temporarily blocked includes (a) driving the rigid pipe by increasing the volume of the fluid filled and sealed in the new pipe, (b) driving the new pipe by an axial force with the aid of a holder at the rear rim of the new pipe, and (c) regulating the movement of the new pipe. An apparatus to carry out the above-mentioned method is also provided. After inserting one pipe, all defines of the apparatus are detached, then another new pipe is connected, and repeated insertions end up as complete pipeline.

REFERENCES:
patent: 2325565 (1943-07-01), Williams
patent: 2756020 (1956-07-01), D'Audiffret et al.
patent: 2794758 (1957-06-01), Harper et al.
patent: 4456401 (1984-06-01), Williams
patent: 4626134 (1986-12-01), Coumont
patent: 4723873 (1988-02-01), Masznyik
patent: 4724108 (1988-02-01), Jurgenlohmann et al.
Pipeline Refurbishing Method, Taisei Corporation.

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