Apparatus and method for damming a pipeline

Details Apparatus and method for damming a pipeline Apparatus and method for damming a pipeline

1975-10-10

1977-03-22

Aegerter, Richard E.

Pipes and tubular conduits

With closures and plugs

Inflatable

138 97, F16L 5512

Patent

active

040130975

ABSTRACT:
An apparatus useful in damming the flow of fluid through a pipeline is shown. The apparatus comprises an inflatable bladder encompassed within a flexible, expandable outer bag made of a rubber-like material. The bladder and bag are separated by an annular zone filled with a viscous fluid. The bladder is attached by means of an umbilical tube and suitable valving to a source of pressurized fluid. In use, the apparatus is positioned within a section of pipeline upon which repairs are to be made and the bladder is inflated forcing the outer bag, through the medium of the viscous liquid, to be forced into tight, sealing contact with the interior surfaces of the conduit in which the apparatus is positioned. The apparatus is inexpensive and portable and may be used to seal off sections of pipeline from larger systems without requiring extended or costly shutdowns.

REFERENCES:
patent: 1158595 (1915-11-01), Voorhees
patent: 1605782 (1926-11-01), Rota
patent: 1760750 (1930-05-01), Goodman
patent: 1814677 (1931-07-01), Fennema
patent: 3834422 (1974-09-01), Larson

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