Flexible tubular duct for transporting gaseous hydrocarbons

Details Flexible tubular duct for transporting gaseous hydrocarbons Flexible tubular duct for transporting gaseous hydrocarbons

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/147 (2006.01) F16L 11/08 (2006.01)

Patent

CA 2684770

The invention relates to a flexible tubular duct (1) for transporting gases under high pressure in the field of offshore oil exploitation. The duct is of the unlinked and smooth passageway type, and comprises from inside to outside an inner polymer tube (2), a pressure vault (3) formed by the short-pitch rolling of at least one wire, a first inner pair (4, 5) of crossed traction armour plies, an intermediate polymer sleeve (6), a second outer pair (7, 8) of crossed traction armour plies and an outer polymer sleeve (9) and it is characterized in that the inner pair (4, 5) of traction armour plies is wound with a helical angle of less than 35° and in that the outer pair (7, 8) of traction armour plies is wound with a helical angle substantially equal to 55°.

L'invention concerne une conduite tubulaire flexible (1) pour le transport de gaz sous haute pression dans le domaine de l'exploitation pétrolière offshore. La conduite est du type non lié et à passage lisse, et comprend de l'intérieur vers l'extérieur un tube polymérique interne (2), une voûte de pression (3) formée par l'enroulement à pas court d'au moins un fil, une première paire intérieure (4, 5) de nappes croisées d'armures de traction, une gaine intermédiaire polymérique (6), une deuxième paire extérieure (7, 8) de nappes croisées d'armures de traction et une gaine externe polymérique (9), et elle est caractérisée en ce que la paire intérieure (4, 5) de nappes d'armures de traction est enroulée avec un angle d'hélice inférieur à 35° et en ce que la paire extérieure (7,8) de nappes d'amures de traction est enroulée avec un angle d'hélice sensiblement égal à 55°.

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