| 摘要 |
Tubular structure (1, 20, 30,40), longitudinally deployable between a. folded configuration and a deployed configuration, having at least a radial dimension increasing between the folded configuration and the deployed configuration, having at least a portion of the wall which includes at least two structural layers (2,3) permanently attached to one another in at least one location, the layers bordering at least an intermediate cavity (10, 11, 12 , 13) extending longitudinally wherein the cavity increases substantially the thickness of the wall in at least one location during the deployment of the tubular structure, and the cavity is filled with a hardenable material, the material being hardened after the deployment of the tubular structure. Such structure is well fitted to be used in oilwell dowhole structure and casings or underwater pipeline/flowline.
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