Method of submerging pipelines

Details Method of submerging pipelines Method of submerging pipelines

1976-05-28

1977-10-11

Shapiro, Jacob

Pipes and tubular conduits

Repairing

61110, 138111, 138112, 138113, F16L 100

Patent

active

040528626

ABSTRACT:
The invention consists of a method and apparatus for laying a pipeline, such as an oil duct or a gas duct, in a body of water, wherein the pipeline, or a section thereof, is enclosed within a ballast tube such that an intermediate space is formed between the pipeline or pipeline section and the ballast tube, said space being filled with a liquid less dense than water, such as a light hydrocarbon, while the pipeline is being laid, but may be filled, after the pipeline has been laid, with soft water or with a liquid heavier than water such as a grouting having a base of a hydraulic or hydrocarbon binder. The invention also comprises the provision of a plug at one end of an assembly of pipeline section and ballast tube whereby a free end of said assembly may be secured as by welding to a second assembly of pipeline section and ballast tube at a position remote from the liquid contained in the intermediate space in said first assembly.

REFERENCES:
patent: 3086369 (1963-04-01), Brown
patent: 3311132 (1967-03-01), McWilliams
patent: 3466881 (1969-09-01), Lamy
patent: 3909756 (1975-09-01), Ritchie

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