Pipe joints or couplings – With casing – lining or protector – Insulated
Reexamination Certificate
2004-09-17
2008-08-05
Dunwoody, Aaron M (Department: 3679)
Pipe joints or couplings
With casing, lining or protector
Insulated
C285S293100, C138S156000
Reexamination Certificate
active
07407197
ABSTRACT:
An apparatus for protecting exposed pipeline joints on weight coated pipelines used in offshore applications includes a pliable cover sleeve which overlaps a pair of weight coat sections that surround the pipeline on each side of the pipe joint. The cover sleeve circumferentially envelops the pipe joint, forming an annular space enclosed between the pipe and the cover sleeve and bordered by the pair of weight coat sections. The cover sleeve includes a number of protruding ridges forming a number of chambers between the ridges in flow communication with the annular space. A joint-filling material of polyurethane foam formed by polyurethane chemicals fills the annular space and the chambers between the ridges of the cover sleeve. As the joint filling material hardens, it interlocks with the ridges of the cover sleeve, securing the joint filling material between the cover sleeve and the pipe joint.
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Bracewell & Giuliani LLP
Dunwoody Aaron M
Offshore Joint Services, Inc.
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