Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1983-12-02
1985-06-18
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
114 42, 405154, 405 61, F16L 100
Patent
active
045238766
ABSTRACT:
During winter construction of offshore Arctic pipelines, it is frequently necessary to cut an ice slot in order to lay a pipeline on the sea bottom. Once such slots are cut, they rapidly freeze over, so that it is necessary to remove ice from the slot during the pipelaying time span. The present invention provides a method and apparatus for removing the newly formed ice from the ice slot. An inclined plane, sized to fit within the ice slot width to be maintained, penetrates below the surface of the water within the slot and to a depth at or below the underside of the newly formed ice on the water's surface. By moving the plane along the surface, the ice is raised, broken, and then conveyed upward and then to one side out of the ice slot as spoil.
REFERENCES:
patent: 3667416 (1972-06-01), Fioravanti et al.
patent: 3766737 (1973-10-01), Howard
patent: 3791328 (1974-02-01), Schirtzinger
patent: 3913511 (1975-10-01), Weiland
patent: 4436046 (1984-03-01), Braley
Shell Oil Company
Taylor Dennis L.
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