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US 5,474,132 AGranted
Marine riser
AssigneeWestinghouse Electric Corp.
InventorWilliam P. Gallagher
Life of this patent
Estimating the term…
Abstract
A marine riser section which has an elongated light-weight composite shells is provided with a protective liner of elastomer, epoxy resin or metal. The choice of elastomers includes nitrile rubber, fluorinated rubber or chlorosulfonated polyethylene; the choice of resins includes an aromatic amine cured epoxy with an added styrene curing system; and the metals include steel or titanium alloys or electroless nickel coating.
Claims8
An improved marine riser comprising:
- (a) a light-weight elongated cylindrical shell having an inner surface and having a strength-to weight ratio greater than steel;
- (b) a liner on said inner surface of said shell;
- and
- (c) said liner being selected from the group consisting of
- (i) an elastomer of nitrile rubber, fluorocarbon elastomer or chlorosulfonated polyethylene,
- (ii) aromatic amine cured epoxy resins with an added styrene curing system,
- (iii) steel or titanium alloys, and
- (iv) electroless nickel coating.
5 more elements
Dependencies are inferred from the claim text.