Tubular body comprising two or more layers of helically...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 9/16 (2006.01)

Patent

CA 2683465

The invention concerns an elongated, multilayered tubular body (1) comprising an elongated, tubular inner hollow core (5), an elongated, tubular inner casing (4) and an elongated, tubular outer casing, the inner casing surrounding the hollow core, the outer casing surrounding the inner casing, the outer casing comprising at least two layers (2,3), each layer consisting of one or more longitudinally preformed, flat elongated metal strips, the preforming of the strips such that the strips have been bent helically in such,a way that the consecutive windings of the helix touch or almost touch to each other, each strip in one layer overlapping with other strips in other layers, the layers in the outer casing being bound to each other by an adhesive. The invention further concerns the use of the elongated tubular bodies in the transport of hydrocarbons as oil and/or natural gas optionally containing hydrogen sulphide and/or carbon dioxide or for the transport of gasses and/or liquids as carbon dioxide, hydrogen, water or steam.

La présente invention concerne un corps tubulaire multicouche de forme allongée (1) comportant une âme creuse interne tubulaire de forme allongée (5), une gaine interne tubulaire de forme allongée (4) et une gaine externe tubulaire de forme allongée, la gaine interne entourant l'âme creuse, la gaine externe entourant la gaine interne, la gaine externe comportant au moins deux couches (2, 3), chaque couche étant constituée d'une ou de plusieurs bandes métalliques plates de forme allongée préformées dans le sens de la longueur, le préformage des bandes étant réalisé de sorte que les bandes ont été cintrées en spirale, afin que des enroulement successifs de l'hélice soient en contact ou quasiment en contact mutuel, chaque bande dans une couche chevauchant les autres bandes dans d'autres couches, les couches dans la gaine externe étant assemblées par un adhésif. L'invention concerne également l'utilisation de corps tubulaires de forme allongée dans le transport d'hydrocarbures tels que du pétrole et/ou du gaz naturel contenant éventuellement du sulfure d'hydrogène et/ou du gaz carbonique ou pour le transport de gaz et/ou de liquides tels que du gaz carbonique, de l'hydrogène, de l'eau ou de la vapeur.

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