Flexible pipe, its manufacture and use

Details Flexible pipe, its manufacture and use Flexible pipe, its manufacture and use

2011-08-02

2011-08-02

Hook, James F (Department: 3754)

Pipes and tubular conduits

Flexible

Spirally wound material

C138S125000, C138S129000, C138S133000, C138S135000

Reexamination Certificate

active

07987875

ABSTRACT:
A flexible, typically un-bonded, armored pipe, and a method manufacturing a flexible pipe. The pipe has a center axis and comprises an inner liner surrounded by a radial armoring and an axial armoring, the radial and axial armoring each comprising at least one armoring layer of armoring profiles wound with winding angles αirelative to the center axis. The winding angle of the innermost armoring layer αinnermostis larger than the winding angle of the outermost armoring layer αoutermost. The outer radial armoring layer has sufficient strength and flexibility to prevent prohibitively large radial deformations of underlying axial armoring layers without considerably increasing the radial contact pressure on underlying axial armoring layer. At least one fibrous layer, comprising at least two fibrous cords wound on an underlying layer, surrounds the outermost armoring layer. The flexible pipe is useful in terrestrial and/or subsea transport of fluids at elevated temperature and/or pressures.

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