Abstract: An undersea flexible pipe for conveying hydrocarbons, the pipe including from the inside to the outside an inner sealing sheath, at least one ply of traction armors wound about the inner sealing sheath, a deformable holding layer including at least one flexible ribbon or holding band wound about the traction armor ply, and at least one tubular structure surrounding the holding layer, wherein the ribbon includes fiber strands oriented substantially in the longitudinal direction of the ribbon. The ribbon is covered by a reinforcing layer of a polymer material for the deformation resistance of the holding layer.

Abstract: A flexible pipe and a method of producing it. The pipe has two tubular structures, internal and external, and a tubular axial blocking layer. The tubular blocking layer comprises two section wires each having a trapezoidal cross section. The trapezoidal cross section defines a base and two sloping lateral flanks. The base of one of the two section wires is oriented toward the internal tubular structure. The base of the other section wire is oriented in the opposite direction. The section wires are wound side by side forming contiguous coils. The internal tubular structure includes a wire having a wound structure to form transversely blocked coils. One of the two section wires is wound against said structure coils.

Abstract: A flexible duct with a frame made by winding a S-profiled metal strip into clamped turns, wherein the edges of two adjacent turns overlap each other in order to form between them a helical closed space having an essentially rectangular cross-section and at least partially filled by a helically-wound spacer separate from the metal strip and resting on at least two opposing walls of the lower surface and the upper surface, wherein the spacer has, in the winding radial direction, a crush resistance substantially equal to zero and, in the winding longitudinal direction along the pipe, a substantial crush resistance.

Abstract: A flexible duct with a frame made by winding a S-profiled metal strip into clamped turns, wherein the edges of two adjacent turns overlap each other in order to form between them a helical closed space having an essentially rectangular cross-section and at least partially filled by a helically-wound spacer separate from the metal strip and resting on at least two opposing walls of the lower surface and the upper surface, wherein the spacer has, in the winding radial direction, a crush resistance substantially equal to zero and, in the winding longitudinal direction along the pipe, a substantial crush resistance.

Abstract: An undersea flexible pipe for conveying hydrocarbons, the pipe including from the inside to the outside an inner sealing sheath (18), at least one ply of traction armors (14, 16) wound about the inner sealing sheath, a deformable holding layer (12) including at least one flexible ribbon or holding band wound about the traction armour ply, and at least one tubular structure (10) surrounding the holding layer, wherein the ribbon includes fiber strands are oriented substantially in the longitudinal direction of the ribbon. The ribbon is covered by a reinforcing layer of a polymer material for the deformation resistance of said holding layer.

Abstract: A flexible pipe and a method of producing it. The pipe has two tubular structures, internal and external, and a tubular axial blocking layer. The tubular blocking layer comprises two section wires each having a trapezoidal cross section. The trapezoidal cross section defines a base and two sloping lateral flanks. The base of one of the two section wires is oriented toward the internal tubular structure. The base of the other section wire is oriented in the opposite direction. The section wires are wound side by side forming contiguous coils. The internal tubular structure comprises a wire having a wound structure to form transversely blocked coils. One of said two section wires is wound against said structure coils.

Abstract: A flexible tubular pipe comprising a metal carcass helically coiled about a longitudinal axis of said flexible pipe and the carcass comprises a seamed profiled hollow tube.

Abstract: A flexible tubular pipe for hydrocarbon transport, comprising from inside to outside at least a carcass, an inner sheath, tensile armoring plies and an outer sheath, wherein the carcass is formed by winding of at least an anti-corrosive elongated metal element with large cross-section, with successive windings stapled with a thin anti-corrosive metal strip.

Abstract: A flexible tubular pipe comprising at least one metal profile spiralled in a helix about a longitudinal axis of the flexible pipe. The profile consists of a metal strip, each turn of which comprises two separate box sections which are obtained by bending the said strip so that the free edges of the strip are turned down between the two box sections and are in contact with a strip portion provided on an upraised bulge formed between the two box sections. The contact portion ties approximately along the neutral fiber of the profile. Each box section has a trapezoidal shape. Connectors above or below the profile connect windings. The edges of the connectors extend into the bulges. Profiling or extra elements are provided for the connectors.

Abstract: A flexible tubular pipe for hydrocarbon transport, comprising from inside to outside at least a carcass, an inner sheath, tensile armoring plies and an outer sheath, wherein the carcass is formed by winding of at least an anti-corrosive elongated metal element with large cross-section, with successive windings stapled with a thin anti-corrosive metal strip.

Abstract: This flexible tubular pipe comprises at least, from the inside outwards, an internal sealing sheath (1) made of a polymer material, a cylindrical pressure vault (2) having an external face and an internal face placed over the internal sheath (1), the vault (2) consisting of the winding, in a helix with a short pitch and with a gap between turns, of an interlocked metal profile wire (10), at least one ply (3, 4) of tensile armor layers wound with a long pitch and an external protective sealing sheath (5) made of a polymer; the fastener wire (20) has the same height has the profile wire and is fastened below the neutral fiber of the profile wire, the ratio of the cross section of the profile wire to the cross section of the fastening wire is between 1 and 2 and the ratio of the moment of inertia Iyy of the profile wire to the moment of inertia Iyy of the fastening wire is between 1 and 2.

Abstract: It is of the type comprising at least one metal profile (P) spiralled in a helix about a longitudinal axis (A-A) of the said flexible pipe and is characterized in that the profile (P) consists of a metal strip (1), each turn of which comprises two separate box sections (2, 3) which are obtained by bending the said strip so that the free edges (8, 9) of the strip are turned down between the two box sections (2, 3) and are in contact with a strip portion (6) provided on a bulge (5) formed between the two box sections, the said contact portion (6) lying approximately along the neutral fibre (7) of the said profile, and in that each box section (2, 3) has a trapezoidal shape.

Abstract: A flexible metal tube with closed section and a flexible pipe comprising such a metal tube, comprising a strip with substantially constant thickness and wound helically around an axis, the strip includes at least a closed section having walls formed by portions of a common turn of the strip, the closed section includes an upper wall and a lower wall and the section is arranged at one end of said strip while the other end terminates in a free edge. The closed section is trapezoidal in cross-section. A bulge radially oriented towards the upper wall of the closed section is provided between the closed section and the free edge of the stirrup. The invention is in particular applicable to flexible tubular pipes.

Abstract: The invention concerns a flexible conduit comprising an internal gasproof undulating metal tube (1), the wall of which has helical undulations (8), the external surface of said internal tube having at least concave (10) and convex (11) rounded parts corresponding to the internal and external parts of the undulations respectively, and at least an arch (2) arranged around said internal metal tube and made up of at least a form wire (9) coiled in spires. The invention is characterized in that the arch (2) has an internal surface with helical undulation, comprising at least concave (16) and convex (15) rounded parts and the external surface of the internal metal tube is supported in its concave rounded part (10) by a convex part (15) of the arch (2) internal surface and in its convex rounded part (11) by a concave part (16) of the arch internal surface, said internal arch surface and said internal tube external surface matching in form and the interstices (i) between the adjacent spires are small.