Method and apparatus for temporarily sealing off pipelines

Details Method and apparatus for temporarily sealing off pipelines Method and apparatus for temporarily sealing off pipelines

1992-12-30

1994-02-15

Walton, George L.

Fluid handling

Processes

Cleaning, repairing, or assembling

1510416, 151042, 137245, 1372455, 137318, 138 97, F16K 710, F16L 55124

Patent

active

052858065

ABSTRACT:
A method and apparatus for sealing off flow in a pipeline for the purpose of repairing the line includes a combination of a restraining rod and inflation bag which can be installed on either or both sides of the intended site of repair; and a flexible sleeve is provided for use in association with the entry ports and any associated valve members for insertion of the restraining rod and bag to prevent the escape of gas from the line during the insertion procedures. Once the line is repaired, the restraining rod and inflation bag can be removed and the entry ports completely sealed off.

REFERENCES:
patent: 1860855 (1932-05-01), Gardner
patent: 1946138 (1934-02-01), Gardner
patent: 3564103 (1971-02-01), Brachschob et al.
patent: 3842864 (1974-10-01), Riegel et al.
patent: 3995655 (1976-12-01), Sands
patent: 4127141 (1978-11-01), Ledonne et al.
patent: 4155373 (1979-05-01), DiGiovanni
patent: 4351349 (1982-09-01), Minotti
patent: 4428204 (1984-01-01), Brister
patent: 4458721 (1984-07-01), Yie et al.

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