Structure formed from a straight strip bent or corrugated and the method of manufacturing same
AssigneeInstitut Francais du Petrole et Coflexip
InventorsMichel Huvey, Anh T. Do, Jean-Michel Gerez, Lucien Le Gallais
Life of this patent
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Abstract
A tubular structure is provided including an internal tube and an external tube which is formed from at least a straight strip bent or undulated, whose width is disposed substantially along at least a line normal to said tubes which it separates. It may be used, for example filled with an insulating lagging, by surrounding a pipe line or being adapted to the pipe line which then forms the internal tube.
Claims9
A tubular structure comprising an internal tube having a first radius, an external tube having a second radius, the radius of the internal tube being smaller than that of the external tube and the external tube being spaced outwardly from the internal tube and a corrugated strip formed of a straight strip folded or undulated, the width of the strip being disposed substantially radially to said internal tube, said strip being arranged on and around the internal tube space with an outer edge of the strip contacting an inner wall of the external tube to provide a reinforcement structure extending along the internal tube via spaces between said internal tube and said external tube;
- the space between said internal tube and said external tube being partially filled with an insulating material.
Dependencies are inferred from the claim text.