Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1997-06-17
1999-11-16
Bagnell, David
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
405157, 138146, F16L 104
Patent
active
059845813
ABSTRACT:
Method and apparatus for weighting pipe segments of the type that are interconnected to form a pipeline for transporting fluids such as natural gas and the like. The exterior surface of each segment is wetted with a friction reducing agent prior to forming a coating of weighting material along the length of the pipe segment, the friction reducing agent selected to prevent the adhering of the weighting material to the pipe. In the preferred embodiment, where a medial portion of the pipe segment is wrapped with an adhesive material prior to wetting the remaining portion of the pipe segment's external surface with the friction reducing agent, and encasing same with the weighting material. Preferably, the adhesive material is joint tape, the friction reducing agent is vegetable oil, and the weighting material is concrete.
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patent: 4395159 (1983-07-01), Karuks et al.
patent: 4449852 (1984-05-01), Muszynski
patent: 4606378 (1986-08-01), Meyer
patent: 4880335 (1989-11-01), Lee
patent: 5476343 (1995-12-01), Sumner
Key Bobby L.
McGill James C.
McGill James M.
B.L. Key Services, L.L.C.
Bagnell David
Lagman Frederick L.
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