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

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F16L 11/12 (2006.01)

Patent

CA 2535363

The invention relates to a method for the drainage of permeate gases from a flexible tubular pipe and a pipe embodied for carrying out said method. The pipe comprises at least one inner pressure sleeve (14), for the transport of hydrocarbons, which contain permeate gases which diffuse across the wall of the inner pressure sleeve (14). The pipe has an outer sleeve (24) and several reinforcement layers (16, 18, 20), arranged in an annular zone (23) between said outer sleeve (24) and said inner pressure sleeve (14). Said annular zone (23) has transport ducts in which the permeate gases can circulate towards the removal means. The method comprises a forced circulation of the permeate gases in said annular zone (23) through said transport ducts towards the removal means.

L'invention concerne une méthode de drainage des gaz de perméation d'une conduite tubulaire flexible ainsi qu'une conduite adaptée à la mise en couvre de la méthode. La conduite tubulaire comporte au moins une gaine interne de pression (14) adapté à véhiculer des hydrocarbures, lesquels contiennent des gaz de perméation qui diffuse à travers la paroi de la gaine interne de pression (14). La conduite comporte une gaine externe (24) et plusieurs nappes de renfort (16, 18, 20) situées dans une zone annulaire (23) comprise entre ladite gaine externe (24) et ladite gaine interne de pression (14), ladite zone annulaire (23) présentant des chemins de passage dans lesquels lesdits gaz de perméation sont susceptibles de circuler vers des moyens d'évacuation ; la méthode consistant à forcer la circulation des gaz de perméation dans ladite zone annulaire (23) à travers lesdits chemins de passage vers lesdits moyens d'évacuation.

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