Method and apparatus for the laying of a submerged pipeline such

Details Method and apparatus for the laying of a submerged pipeline such Method and apparatus for the laying of a submerged pipeline such

1976-05-19

1977-12-13

Shapiro, Jacob

61109, F16L 100

Patent

active

040621987

ABSTRACT:
A method and apparatus for laying a submerged pipeline, such as a submarine pipeline, on the bed of a body of water along a path which crosses a ditch in said bed in which there is a current transverse to the pipeline, the depth of the body of water being at a maximum in said ditch and said pipeline being drawn along said bed from a shore towards open water, wherein at least one ballast tube is integrally associated with the pipeline so that a portion of said pipeline with the associated ballast tube takes up a position within said ditch in substantially U-form, the ballast tube being filled partly with air and partly with water which collects in the portion of the ballast tube of substantially U-form whereby the apparent weight of the pipeline is increased solely with respect to the portion thereof located in said ditch, the water remaining in position in the portion of the ballast tube temporarily located within said ditch as the pipeline and the associated ballast tube move forward during the laying operation. An air circulation pipe may be associated with said ballast tube, being preferably located inside the ballast tube, said pipe placing the part of the space within said ballast tube near the front end thereof into communication with a source of air located on land.

REFERENCES:
patent: 3086369 (1963-04-01), Brown
patent: 3136133 (1964-06-01), Perret
patent: 3311132 (1967-03-01), McWilliams
patent: 3425453 (1969-02-01), Fuller

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