| 摘要 |
<p>The invention relates to an unbonded flexible pipe for the transportation of fluids, in particular hydrocarbon containing fluids and/or gas containing fluids. The pipe has a length and comprises a tubular inner sealing sheath defining a bore with a center axis along the length of the pipe. At least one armor layer surrounds the inner sealing sheath and a carcass (76) is arranged in the bore to support the inner sealing sheath. The carcass (76) comprises at least one profiled elongate element (71a, 71b), which is helically wound to provide elongate windings along the length of the pipe. The profile of the elongate element (71a, 71b) is such that the elongate element windings engage with adjacent elongate element windings directly and/or indirectly. The carcass (76) provides a quasi fluid permeable inner wall (79) of the bore with discontinuities (78) between successive turns of the wound elongate element(s) (71a, 71b). The discontinuities (78) have an average width in the axial direction of the pipe which is about 3 mm or less when the pipe is in an unloaded and unbent condition, and the number of discontinuities (78) is sufficient to allow the pipe to bend with a minimum bending radius of about 10 m or less, when the pipe is in an unloaded condition.</p> |
