Abstract: An underwater pipe, including a metal reinforcing layer around an inner polymeric sealing sheath capable of being in contact with hydrocarbons. The inner polymeric sealing sheath includes a homopolymeric polypropylene or a mixture of homopolymeric polypropylenes, wherein the homopolymeric polypropylene or the mixture has a density greater than 0.900 g/cm3, and a melt index measured at 230° C. under a mass of 2.16 kg of less than 10 g/10 minutes, its preparation method and its use for the transport of hydrocarbons. Such a sheath may be used in contact with hydrocarbons at high temperature.

Abstract: An underwater pipe including a metal reinforcing layer around an inner polymeric sealing sheath which may be in contact with hydrocarbons. The inner polymeric sealing sheath includes a polypropylene block copolymer or a mixture of polypropylene block copolymers, wherein the polypropylene block copolymer or the mixture has a density greater than 0.900 g/cm3, and a melt index measured at 230° C. under a mass of 2.16 kg of less than 10 g/10 minutes, its preparation method and its use for the transport of hydrocarbons. Such a sheath may be used in contact with hydrocarbons at high temperature.

Abstract: An underwater pipe, including a metal reinforcing layer around an inner polymeric sealing sheath capable of being in contact with hydrocarbons. The inner polymeric sealing sheath includes a homopolymeric polypropylene or a mixture of homopolymeric polypropylenes, wherein the homopolymeric polypropylene or the mixture has a density greater than 0.900 g/cm3, and a melt index measured at 230° C. under a mass of 2.16 kg of less than 10 g/10 minutes, its preparation method and its use for the transport of hydrocarbons. Such a sheath may be used in contact with hydrocarbons at high temperature.

Abstract: An underwater pipe including a metal reinforcing layer around an inner polymeric sealing sheath which may be in contact with hydrocarbons. The inner polymeric sealing sheath includes a polypropylene block copolymer or a mixture of polypropylene block copolymers, wherein the polypropylene block copolymer or the mixture has a density greater than 0.900 g/cm3, and a melt index measured at 230° C. under a mass of 2.16 kg of less than 10 g/10 minutes, its preparation method and its use for the transport of hydrocarbons. Such a sheath may be used in contact with hydrocarbons at high temperature.

Abstract: A flexible tubular conduit (10) having a tubular inner pressure structure including a tubular sheath (16) and a pressure vault (18) for taking up the radial forces, and a tubular outer tensile structure having at least one web of tensile armor wires (22, 24), and a holding strip (28) wound in a short-pitch helix over the web of tensile armor wires (24), the holding strip (28) comprising a layer of polymer material and a plurality of strands of fibers stretched substantially in the longitudinal direction of the holding strip (28). The fibers of the strands of the plurality of strands of fibers are mineral fibers, and the plurality of strands of fibers is embedded in the layer of polymer material.

Abstract: A flexible tubular conduit (10) having a tubular inner pressure structure including a tubular sheath (16) and a pressure vault (18) for taking up the radial forces, and a tubular outer tensile structure having at least one web of tensile armor wires (22, 24), and a holding strip (28) wound in a short-pitch helix over the web of tensile armor wires (24), the holding strip (28) comprising a layer of polymer material and a plurality of strands of fibers stretched substantially in the longitudinal direction of the holding strip (28). The fibers of the strands of the plurality of strands of fibers are mineral fibers, and the plurality of strands of fibers is embedded in the layer of polymer material.

Abstract: The present disclosure relates to a flexible tubular pipe (1) of the unbonded type and including, from the inside to the outside, an internal carcass (2), first and second polymeric sheaths (3, 4), at least one tensile armor layer (6, 7) and a polymeric sealing sheath (8) and also at each of its ends, a connecting endpiece (10) comprising i.a., a tubular sleeve (15). The tubular sleeve (15) of a first endpiece (10) includes means (30, 31, 32) for draining the gases from the gap (25) between the sheaths (3, 4) towards the outside of the pipe (1) and the tubular sleeve of the second endpiece (10) including means for draining the gases from the gap (25) between two sheaths (3, 4) towards the outside or towards the inside of the pipe (1).

Abstract: A method including the provision of at least one wire sensor (54A) including a polymeric matrix and having greater electric conductivity than that of the tubular body (52). The method includes the measurement of an electric quantity representative of the integrity of the flexible line, in at least one measurement point (60A, 60B) located on the sensor (54A).

Abstract: The invention relates, on the one hand, to a composite material composition capable of neutralizing acid compounds and of being used under high temperature conditions, said composition being a mixture of a polymer material with a predetermined amount of reactive fillers, the mass fraction of the chemically active products ranges between 4 and 40% and the polymer material is selected from the vinylidene fluoride copolymers family, comprising a vinylidene fluoride monomer, and at least one monomer being selected from among the following monomers: hexafluoropropylene, perfluoro(methylvinyl)ether, perfluoro(ethylvinyl)ether, perfluoro (propylvinyl)ether, tetrafluoroethylene, perfluorobutylethylene, fluoropropylene, chlorotrifluoroethylene, chlorodifluoroethylene, chlorofluoroethylene, trifluoroethylene, and the monomer with the following formulation: CH2?CH—CF2—(CF2)4—CF3 and, on the other hand, to a pipe comprising at least one sheath made from the composite material composition.

Abstract: A method including the provision of at least one wire sensor (54A) including a polymeric matrix and having greater electric conductivity than that of the tubular body (52). The method includes the measurement of an electric quantity representative of the integrity of the flexible line, in at least one measurement point (60A, 60B) located on the sensor (54A).

Abstract: The present disclosure relates to a flexible tubular pipe (1) of the unbonded type and including, from the inside to the outside, an internal carcass (2), first and second polymeric sheaths (3, 4), at least one tensile armor layer (6, 7) and a polymeric sealing sheath (8) and also at each of its ends, a connecting endpiece (10) comprising i.a., a tubular sleeve (15). The tubular sleeve (15) of a first endpiece (10) includes means (30, 31, 32) for draining the gases from the gap (25) between the sheaths (3, 4) towards the outside of the pipe (1) and the tubular sleeve of the second endpiece (10) including means for draining the gases from the gap (25) between two sheaths (3, 4) towards the outside or towards the inside of the pipe (1).

Abstract: The invention relates to a method for evaluating the fatigue life of a polymer composition, including the following steps: i) providing a polymer composition; ii) manufacturing a plurality of axisymmetric test tubes cut from said composition; iii) subjecting said test tubes to a uniaxial traction fatigue test including a plurality of loading and unloading cycles for the test tube, the geometry of the test tube making it possible to subject the material to triaxial stresses, in the area of the test tube cut, simulating the stress conditions for the pressure sheath of a flexible pipe, particularly for off-shore use; and iv) predetermining the number of cycles until the rupture of said polymer composition. The invention is related to the use of said polymer composition selected through the predetermining method for manufacturing pipes or conduits to convey a pressurized and/or corrosive fluid.

Abstract: A method and a device for measuring the movement of a subsea pipeline. The measuring device has an accommodating mount anchored in the sea bed to accept the subsea pipeline. The subsea pipeline is liable to be made to move over a determined travel with respect to the accommodating support as the pipelines deforms. The movement has an amplitude that varies according to the deformation of the subsea pipeline. A plurality of frangible elements secured to one of either the deformable subsea pipeline and the accommodating mount. The frangible elements are intended to be broken in succession by the other of either the deformable subsea pipeline and the accommodating mount when the pipeline is caused to move.

Abstract: The invention relates to a method for evaluating the fatigue life of a polymer composition, including the following steps: i) providing a polymer composition; ii) manufacturing a plurality of axisymmetric test tubes cut from said composition; iii) subjecting said test tubes to a uniaxial traction fatigue test including a plurality of loading and unloading cycles for the test tube, the geometry of the test tube making it possible to subject the material to triaxial stresses, in the area of the test tube cut, simulating the stress conditions for the pressure sheath of a flexible pipe, particularly for off-shore use; and iv) predetermining the number of cycles until the rupture of said polymer composition. The invention is related to the use of said polymer composition selected through the predetermining method for manufacturing pipes or conduits to convey a pressurized and/or corrosive fluid.

Abstract: The pipe is intended for carrying a petroleum effluent comprising at least one of the acid compounds CO2 and H2S. The pipe comprises at least one metal element (3, 5) and a tubular sheath made of a polymer material (2, 4), the metal element being provided outside the sheath. The sheath consists of a mixture of a polymer material with a predetermined amount of products chemically active with said acid compounds so as to irreversibly neutralize the corrosive effects of said compounds and to limit the corrosive effects on said metal elements. The pipe is characterized in that the chemically active products are incorporated into the sheath in form of particles of specific surface area above 5 m2/g.

Abstract: A method and a device for measuring the movement of a subsea pipeline. The measuring device has an accommodating mount anchored in the sea bed to accept the subsea pipeline. The subsea pipeline is liable to be made to move over a determined travel with respect to the accommodating support as the pipelines deforms. The movement has an amplitude that varies according to the deformation of the subsea pipeline. A plurality of frangible elements secured to one of either the deformable subsea pipeline and the accommodating mount. The frangible elements are intended to be broken in succession by the other of either the deformable subsea pipeline and the accommodating mount when the pipeline is caused to move.