| 摘要 |
<p>A wrapping (2) for a conductor, riser or pile (1) on an offshore rig is a composite sheet with an outer skin (3) of impermeable resilient flexible material and an inner layer (4) of felt impregnated with a thixotropic gel. The edges of the wrapping which are to meet are provided with loops (5), conveniently formed by the outer layer being doubled back and apertured, which interdigitate to receive a flat locking bar (12). The wrapping (2) is stretched to make the loops (5) overlap using temporary abutments (7, 19) secured nearby to the outside of the wrapping. In one form the abutments (7) are beams attached to flexible panels (8) with fibres that interlock with fibre panels (6) on the outside of the wrapping. In another form, the outer skin (3) is doubled near each looped edge with a panel (16) having apertures (17) for anchorage members (21) to be inserted and become captive to the panel. These members (21) remain exposed at the windows (17) for coupling to respective beams (19), preferably via a parallel rod (20) that allows hinging.</p> |
