Unbonded flexible pipe

摘要

The invention relates to a unbonded flexible pipe and a method for manufacturing such pipe. The unbonded flexible pipe has a length and a center axis along its length, and comprises an internal sealing sheath around its center axis, a carcass arranged inside the internal sealing sheath, and at least one armor arranged around the internal sealing sheath. The carcass comprises at least one helically wound elongate carcass reinforcement element providing a plurality of carcass reinforcement element windings along the length of the pipe wherein the carcass reinforcement element windings surround and/or are surrounded by a polymer structure, which polymer structure locks said carcass reinforcement element windings relative to each other. Accordingly the carcass reinforcement element windings need not be directly interlocked with each, but are mainly or totally locked to each other by the polymer structure.

主权项

1. An unbonded flexible pipe having a length and a center axis along said length, the unbonded flexible pipe comprising an internal sealing sheath around said center axis, a carcass arranged inside said internal sealing sheath, and at least one armor arranged around the internal sealing sheath, said carcass is formed by a plurality of not directly interlocked carcass reinforcement element windings along the length of said unbonded flexible pipe wherein said carcass reinforcement element windings are adjacent to a polymer structure, which polymer structure locks said carcass reinforcement element windings relative to each other, wherein each of said carcass reinforcement element windings comprises at least one channel arranged to engage with the polymer structure to lock said plurality of carcass reinforcement element windings mechanically to said polymer structure to prevent relative axial movement therebetween.