Composite load transferring technique

Details Composite load transferring technique Composite load transferring technique

2011-03-08

2011-03-08

Hook, James F (Department: 3754)

Pipes and tubular conduits

Repairing

Patches

C249S090000, C425S013000, C425S014000

Reexamination Certificate

active

07900655

ABSTRACT:
A method for repairing and reinforcing a pipeline includes covering a defect in a pipeline section with a composite wrap, isolating the wrap from the ambient environment, and applying a compressive force on the wrap so that the pressure on the wrap is substantially equal to the pipeline pressure. Isolating the wrap involves the use of a housing having a cavity that substantially conforms to the shape of the wrapped section. The cavity may contain a pressurized gas or liquid. Because the pressure acting on the surface of the wrap is at least substantially equal to the pressure of the pipeline section, the wrap cures as if the pipeline is at zero pressure. Once the wrap has effectively cured, the compressive force may be relieved and the housing removed. The composite is now under load and is immediately sharing load with the pipeline.

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International Search Report and Written Opinion issued by the International Searching Authority (ISA/US) on Dec. 1, 2009 in corresponding application PCT/US09/49866; 10pgs.

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