Patent ID: 8561648

Claim:
A flexible pipe comprising: two coaxial tubular structures, including an internal structure and an external structure outward of the internal structure; a tubular axial blocking layer located between the tubular structures, the tubular blocking layer comprising: at least two section wires which are helically wound with a short pitch: each of the at least two section wires having a substantially isosceles trapezoidal cross section defined by a base and two opposite lateral flanks that meet the base, and the flanks are inclined relative to one another; the base of one of the at least two section wires being directed toward the internal tubular structure and the base of the other of the at least two section wires is directed away from the internal tubular structure; the at least two section wires being wound, with the lateral flank of one section against the lateral flank of the other section and forming contiguous coils, wherein the contiguous coils are configured to block the pipe axially in compression, the contiguous coils defining two mating surfaces that are inclined with respect to the axis of said pipe; the internal tubular structure comprises: a structural wire wound at a short pitch which forms structural coils that are transversely blocked relative to one another; the one of the at least two section wires is wound pressing against the structural coils so that bending deformation of the tubular blocking layer simultaneously causes relative axial movement of the structural coils and relative transverse displacement of the contiguous coils along the inclined mating surfaces so as to allow the pipe to bend.