Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1982-02-17
1985-02-12
Husar, Cornelius J.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
405171, 405173, 138 89, F16L 104, F16L 5510
Patent
active
044988117
ABSTRACT:
Apparatus for preventing flow of water from a first underwater pipeline portion forward of the apparatus to a second underwater pipeline portion rearward of the apparatus. At least one wedge-shaped member is mounted on a carriage of the apparatus for grippingly engaging the internal wall of a pipeline for preventing movement of the apparatus in a rearwardly direction upon application of force to the carriage urging the carriage in a rearwardly direction in the pipeline. In order to provide frictional contact with the pipeline wall so that gripping engagement thereof may be effected, the member is continually urged into sliding engagement with the pipeline wall during movement of the apparatus through the pipeline in a forwardly direction. The apparatus is further provided with an annular elastomeric member responsive to water pressure from forwardly of the apparatus for sealingly engaging the pipeline wall to prevent flow of water from the first underwater pipeline portion to the second underwater pipeline portion.
REFERENCES:
patent: 3788084 (1974-01-01), Matthews
patent: 3842612 (1974-10-01), Arnold
patent: 3943982 (1976-03-01), Lecordier
patent: 3978678 (1976-09-01), Duncan
patent: 4057081 (1977-11-01), Jones
patent: 4332277 (1982-06-01), Adkins
Fern Derek T.
Harrison Gary E.
Edwards Robert J.
Husar Cornelius J.
McDermott Incorporated
Simmons James C.
Stodola Nancy J.
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