Highly flexible multistructure tube

Details Highly flexible multistructure tube Highly flexible multistructure tube

2008-03-25

2008-03-25

Hook, James (Department: 3754)

Pipes and tubular conduits

Plural duct

Coaxial

C138S119000, C138S130000

Reexamination Certificate

active

10493351

ABSTRACT:
A multi-structure pipe intended to transport a fluid, used in particular in oil production, including a first hollow and closed tubular structure having a set of substantially circumferential slits, each slit extending on an arc of more than 180° and defining a tension band extending with a helix shape along the said first tubular structure, and at least a second tubular structure having also at least a tension band also in helix shape of the same direction and pitch as the first tubular structure, and the tension bands of the first and second tubular structure being maintained at a fix distance from one another by support of the second tension band on the first tubular structure to provide the tension capacity of the pipe.

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patent: 5927344 (1999-07-01), Nobileau
patent: 6024135 (2000-02-01), Nobileau

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