• 专利附录
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    • 专利摘要:
    The invention relates to a flexible pipe (1) for transporting an oil and/or gas fluid intended to be submerged in a body of water comprising from the outside towards the inside of said flexible pipe (1 ): - an external sealing sheath (2) intended to limit the penetration of water from the body of water into the flexible pipe (1), - at least one external reinforcing structure (3) intended to reinforce the flexible pipe (1) against internal radial forces and/or tensile forces, - an internal sheath (6) for protection, - an annular space (7) delimited by the external sheath (2) and the internal sheath (6), the external reinforcement structure (3) being arranged within said annular space (7), - a tubular internal reinforcement structure (8) intended to reinforce the flexible pipe (1) against external radial forces exerted on the flexible pipe (1) comprising at least one helical gap (10) and at least one element seal (11) intended to limit the passage of oil and/or gas fluid from the internal passage towards the annular space (7), said sealing element (11) being wound helically within at least one interstice helical (10). The invention makes it possible to reduce the corrosion of the external reinforcement structure.
    公开号:FR3084130A1
    申请号:FR1800769
    申请日:2018-07-18
    公开日:2020-01-24
    发明作者:Frederic Demanze；Laurent Paumier；Benjamin Senneville；Guillaume Petiton
    申请人:Technip France SAS；
    IPC主号:
    专利说明:

    Flexible pipe for the transport of an oil and / or gas fluid intended to be submerged within a body of water
    DESCRIPTION
    Technical field of the invention
    The present invention relates to the technical field of flexible pipes intended for the transport of an oil and / or gas fluid within a body of water.
    The technical field of the invention relates more particularly to a flexible pipe of unbound type (“unbonded” in English).
    State of the art
    In general, flexible pipes for the transport of an oil and / or gas fluid in an underwater environment are immersed in a body of water at depths that can exceed 3000 m. They find their particular interest in the routing of petroleum and / or gas fluid between a bottom installation and a surface installation. They can also be used to connect two downhole installations. Certain flexible pipes can also be used to connect two surface installations.
    The structure of a flexible pipe is widely known in the prior art and is notably described in the normative documents API RP 17B (Recommended Practice for Flexible Pipe), and API 17J (Specification for Unbonded Flexible Pipe), published by the American Petroleum Institute.
    The flexible pipe is generally formed by a set of concentric and superimposed layers. It is considered to be “unbound” when at least one of the layers of the flexible pipe is able to move longitudinally relative to the adjacent layers during bending of the flexible pipe. In particular, an unbound flexible pipe is a flexible pipe devoid of binding materials connecting layers forming the pipe.
    A flexible pipe generally comprises, from the inside to the outside, an internal reinforcement structure commonly called carcass or internal carcass, an internal polymeric sealing sheath, at least one external reinforcement structure and an external polymeric sealing sheath .
    The main function of the internal carcass is the recovery of radial crushing forces, for example those linked to hydrostatic pressure. It is made from a profiled metal strip and wound at a short pitch to form turns interlocked with each other. The term "short pitch" characterizes helical windings with an absolute helix angle between 70 ° and 90 °. The internal carcass has an absolute helix angle generally close to 85 °. Generally, the strip section is S-shaped. Also, each of the turns of the strip cooperates with an adjacent turn forming a stapling of the internal reinforcing structure.
    The internal polymeric sealing sheath more commonly called "pressure sheath" ("pressure sheath" in English) or "internal sheath" is a sheath extruded around the internal reinforcement structure. Its main function is to confine the petroleum and / or gas fluid inside the pipe. Thus, the internal polymeric sealing sheath defines an internal passage for the circulation of petroleum and / or gas fluid. The internal sheath is arranged within the external reinforcement structure.
    The external reinforcement structure is intended to reinforce the flexible pipe against radial and / or axial forces. The flexible pipe generally comprises two reinforcing structures. For example, from the inside to the outside, the flexible pipe comprises a pressure vault and layers of tensile armor. The pressure vault (“pressure armor” in English) is generally formed of a wire of metallic form wound in short pitch in contiguous turns around the internal polymeric sealing sheath. The pressure vault thus allows the radial forces linked to the pressure of the fluid circulating in the pipe to be taken up. The pressure vault has an absolute helix angle generally close to 85 °. The function of the tensile armor plies is to take up the tensile forces exerted on the pipe. These layers are made up of armor elements wound in long steps around the pressure vault. The term "long pitch" characterizes a helical winding with an absolute helix angle less than or equal to 60 °. The flexible pipe generally comprises one or two pairs of crossed plies of tensile armor, said plies having an helix angle of absolute value typically between 20 ° and 60 °, and advantageously between 25 ° and 55 °. The armor elements, commonly called armor wires, are generally made of a metallic or composite material. The polymeric sealing outer sheath commonly known as the outer sheath is an extruded sheath around the external reinforcement structure. The purpose of this external sheath is in particular to protect the external reinforcement structure against corrosion, in particular when the flexible pipe is submerged.
    Although the pressure sheath is tight against hydrocarbons and other transported fluids such as water, small amounts of gas can slowly diffuse through it, especially when the temperature and pressure are high. This phenomenon mainly concerns small molecules, in particular gaseous water, and the gases of carbon dioxide (CO2), hydrogen sulfide (H2S) and methane (CH4). Thus, when the petroleum and / or gas fluid comprises one or more of these gases, this or these latter may cross the internal carcass which is not leaktight and then diffuse through the pressure sheath before accumulating in the annular space located between the pressure sheath and the external sheath. In the presence of water within the annular space, coming for example from an accidental tearing of the external sheath or from a condensation of the water in the gaseous state having diffused through the pressure sheath, these gases can cause corrosion of metallic elements and chemical aging of any composite material elements of the external reinforcement structure. Corrosion of the metallic elements of the external reinforcement structure can then lead to premature rupture of the flexible pipe.
    There is then a need to provide a flexible pipe for the transport of an oil and / or gas fluid intended to be immersed in a body of water presenting limited risks of rupture.
    Disclosure of invention
    For this purpose, the invention provides a flexible pipe for the transport of an oil and / or gas fluid intended to be immersed in a body of water comprising from the outside towards the inside of said flexible pipe:
    - an external sealing sheath intended to limit the penetration of water from the body of water into the flexible pipe,
    at least one external reinforcement structure intended to reinforce the flexible pipe against internal radial forces and / or tensile forces,
    - an internal protective sheath,
    an annular space delimited by the external sheath and the internal sheath, the external reinforcement structure being arranged within said annular space,
    an internal tubular reinforcement structure intended to reinforce the flexible pipe against external radial forces exerted on the flexible pipe comprising:
    - A profiled strip, wound helically to form the tubular internal reinforcement structure, the adjacent turns of said profiled strip being stapled, said profiled strip delimiting at least one helical gap.
    The invention is distinguished in that the internal reinforcing structure further comprises:
    - At least one sealing element intended to limit the passage of petroleum and / or gas fluid from the internal passage towards the annular space, said sealing element being wound in a helix within at least one helical interstice.
    The internal reinforcement structure has helical interstices through which small molecules of gas contained in the oil and / or gas fluid such as carbon dioxide (CO2), hydrogen sulfide (H2S) or methane (CH4) or water molecules in the gaseous state can pass and then diffuse through the internal polymeric sealing sheath. According to the present invention, the sealing element seals at least a portion of these helical interstices to block the circulation of petroleum and / or gas fluid through the internal reinforcement structure. In this way, the internal reinforcement structure no longer lets the petroleum and / or gas fluid pass, thus forming a tight structure which considerably limits the amount of gas that can diffuse into the annular space from inside the flexible pipe. Consequently, thanks to the invention, the quantity of corrosive gases present in the annular space remains very small and below a threshold capable of causing degradation of the external reinforcement structure.
    According to one embodiment of the invention, the profiled strip has a cross section comprising:
    a first end region comprising a free end of lower support, an upper support branch linked to the free end of lower support by a first transverse connecting branch,
    a second end region comprising a lower support branch, a free upper support end linked to the lower support branch by a second transverse connecting branch,
    a central region comprising a third transverse branch connecting the upper support branch of the first end region to the lower support branch of the second end region, and the free upper support end of the second end region of a first turn is inserted between the free lower support end and the upper support branch of the first end region of an adjacent turn to form the stapling of the internal reinforcement structure .
    The configuration of the internal reinforcement structure allows external radial forces to be taken up, typically those linked to the hydrostatic pressure exerted on the flexible pipe which can range up to 300 bars or even more. Also, the present stapling forms a gap between each turn, the axial amplitude of which can vary allowing bending of the flexible pipe. The amplitude of the tilt is notably limited by the second transverse connecting branch of each turn. Thus, the internal reinforcement structure is sufficiently flexible and resistant for the flexible pipe applications.
    According to one embodiment of the invention, the helical gap is delimited radially by the lower support branch of the second end region of the first turn and by the free lower support end of the first region d end of the adjacent turn, and / or via the free upper support end of the second end region of the first turn and through the lower free support end of the first end region of the turn adjacent, and / or by the free upper support end of the second end region of the first turn and by the upper support branch of the first end region of the adjacent turn.
    This embodiment advantageously makes it possible to reinforce the tightness of the internal reinforcement structure. In fact, between each turn, there is an axial gap opening towards the inside of the flexible pipe and an axial gap opening towards the internal polymeric sealing sheath. The amplitude of the internal and external axial offset varies during bending of the flexible pipe which guarantees the flexibility of the flexible pipe. On the other hand, the variation in the amplitude of the axial gap would make it difficult to insert a sealing element since the latter could not accommodate variations in the amplitude of the axial gap by ensuring a sufficient sealing function. Thus, advantageously, the helical gap in which the sealing element is wound in a helix has a substantially constant amplitude, taken radially relative to the axis of the pipe. Therefore, despite an axial displacement of the turns to accommodate the flexions of the flexible pipe, the tightness of the internal reinforcement structure is preserved.
    According to one embodiment of the invention, the free lower bearing end of the first end region of a turn comprises a first section extending from the first transverse connecting branch to a second section having a concavity directed towards the lower support branch of the second end region of the adjacent turn.
    Thanks to this concavity, the thickness of the wall of the internal reinforcing tubular structure is greater than or equal to four times the thickness of the profiled strip. This improves the internal and external pressure resistance of the internal reinforcement structure.
    According to one embodiment of the invention, the helical gap is delimited radially by the lower support branch of a turn and by the second section of the lower free support end of an adjacent turn.
    This embodiment advantageously makes it possible to guarantee the stability of the sealing element within the internal reinforcement structure. Indeed, the concavity of the free end of the lower support makes it possible to mechanically fix the sealing element within the helical gap. In addition, in this configuration, the pressure prevailing inside the flexible pipe reinforces the tightness of the internal reinforcement structure because it will increase the contact pressure between the sealing element and the profiled strip. Also, in this configuration, under the effect of the pressure prevailing inside the flexible pipe, the sealing element tends to deform so as to increase the volume occupied by the sealing element within of the helical gap which further strengthens the tightness of the internal reinforcement structure.
    According to one embodiment of the flexible pipe, the free upper bearing end of the second end region of a turn comprises a first section extending from the second transverse connecting branch to a second section having a concavity directed towards the upper support branch of the first end region of the adjacent turn and in that a helical gap is further delimited by said second section of the free upper support end and by the branch upper support of the first end region of an adjacent turn.
    According to one embodiment of the flexible pipe, the internal reinforcing structure comprises a plurality of sealing elements.
    The plurality of sealing elements makes it possible to fill a plurality of gaps within the internal reinforcement structure. This thus makes it possible to reinforce the tightness of the internal reinforcement structure with respect to the petroleum and / or gas fluid transported, and thus to limit the quantity of small gas molecules such as carbon dioxide (CO2), hydrogen sulfide (H2S), methane (CH4) or even water in the gaseous state, which diffuse through the internal polymeric sealing sheath.
    According to one embodiment of the flexible pipe, the sealing element has an oval cross section.
    Alternatively, according to the invention, the sealing element has a rectangular cross section.
    The different geometries in cross section of the sealing element make it possible to guarantee an optimal internal reinforcement structure sealing. Indeed, these geometries are adapted to the geometry of the gap.
    According to one embodiment of the flexible pipe, the sealing element has a thickness less than or equal to half the thickness of the profiled strip.
    For a sealing element having a rectangular cross section, its thickness is advantageously less than or equal to half the thickness of the profiled strip. The smaller the thickness of the helical sealing element, the lower the input flow rate of gases such as carbon dioxide (CO2), hydrogen sulfide (H2S), methane (CH4) or even water in the gaseous state within the annular space is small. Such a thickness also makes it possible to minimize the radial amplitude of the helical interstices within the internal reinforcement structure and thus to reinforce its sealing.
    According to one embodiment of the flexible pipe, the sealing element comprises a main body formed of a polymeric or metallic material.
    The linear volume flow rate of small gas molecules such as carbon dioxide (CO2), hydrogen sulfide (H2S), methane (CH4) or even water in the gaseous state is around 10 ' 7 cm 2 / s at a temperature of 80 ° C, and at a pressure of 40 bar within the internal polymeric sealing sheath. The linear volume flow rate within the sealing element formed from a metallic material in particular, is less than 10 ' 7 cm 2 / s at a temperature of 80 ° C, and at a pressure of 40 bar. This thus makes it possible to considerably reduce the quantity of these gas molecules within the annular space.
    Furthermore, the polymeric material has significant flexibility, which does not significantly increase the stiffness of the internal reinforcing structure. The flexible pipe can then be subjected to bending without damaging the tightness of the internal reinforcement structure.
    For example, according to the invention, the polymeric material is chosen from a thermoplastic or an elastomer or a thermoplastic elastomer.
    According to one embodiment of the flexible pipe, the material comprises fillers intended to reduce the coefficient of friction between the sealing element and the profiled strip.
    According to one embodiment of the flexible pipe, the sealing element comprises a polymeric coating intended to reinforce the sealing of said sealing element with respect to petroleum and / or gas fluid.
    According to one embodiment of the flexible pipe, the sealing element comprises at least one reinforcing element intended to reinforce the resistance of the sealing element with respect to pressure.
    According to one embodiment of the flexible pipe, the sealing element is fixed to at least part of the profiled strip, by gluing for example.
    The chemical fixing of the sealing element to at least part of the profiled strip of the internal reinforcement structure makes it possible to maintain the sealing element within the helical gap despite the axial displacement of the turns during a bending of the flexible pipe.
    Description of the figures
    The invention will be better understood on reading the description which follows, given solely by way of example, and made with reference to the appended drawings, in which:
    - Figure 1 is a perspective view of a section of a flexible pipe according to the invention;
    - Figure 2 is a half sectional view, taken along a plane containing the axis of the flexible pipe, of a turn of the profiled strip of the internal reinforcement structure of the flexible pipe of Figure 1;
    - Figure 3 is a half sectional view, taken along a plane containing the axis of the flexible pipe, the internal reinforcing structure and the internal sheath of the flexible pipe of Figure 1;
    - Figure 4A is a half sectional view, taken along a plane containing the axis of the flexible pipe, of a turn, stapled to an adjacent turn, of the internal reinforcement structure in a first position having a first axial gap internal Ji1 between the turns;
    - Figure 4B is a view similar to Figure 4A in a second position having a second internal axial gap JI2 between the turns;
    - Figure 5A is a half sectional view, taken along a plane containing the axis of the flexible pipe, of a turn of the internal reinforcement structure stapled to an adjacent turn, comprising a sealing element wound helically at within a helical gap;
    - Figures 5B to 5D are views similar to Figure 5A, illustrating alternative embodiments;
    - Figure 6 is a half sectional view, taken along a plane containing the axis of the flexible pipe, of the internal reinforcement structure according to an alternative embodiment.
    Preferred Modes of Carrying Out the Invention
    A flexible pipe (1) according to the invention is for example shown in perspective in Figure 1.
    The flexible pipe (1) is intended to be immersed in a body of water, for the transport of an oil and / or gas fluid.
    In particular, the flexible pipe (1) ensures the transport of petroleum and / or gas fluid between a bottom assembly and a surface assembly, between two bottom assemblies or even two surface assemblies. The bottom assembly is for example a manifold (known as a "manifold" in English), a wellhead (known as a "wellhead" in English) or any other subsea structure to which the flexible pipe can be connected. The surface assembly is for example a fixed platform such as a self-elevating platform (called "jack-up rig" in English) or a mobile platform such as a floating production, storage and unloading unit called FPSO ( for "Floating Production Storage and Offloading" in English) or any other surface assembly to which the pipe can be connected.
    The body of water in which the flexible pipe (1) is immersed is for example a lake, a sea or an ocean. The depth of the body of water is between 50 m and 5000 m, generally between 100 m and 2500 m. The hydrostatic pressure exerted on the flexible pipe (1) can therefore go up to 500 bar.
    The oil and / or gas fluid is formed from a multiphase mixture comprising liquid phases formed of linear and / or cyclic carbon compounds, saturated and / or unsaturated, of variable density and water, of a gas phase formed of methane. (CH 4 ), carbon dioxide (CO2), hydrogen sulfide (H 2 S) and other gas molecules, and optionally a solid phase comprising sand. The temperature of the oil and / or gas fluid leaving the well is generally between 50 ° C and 200 ° C, typically between 50 ° C and 130 ° C. The pressure of the oil and / or gas fluid is greater than 100 bar, greater than 300 bar, greater than 500 bar or greater than 1000 bar. The invention is particularly suitable for the case where the petroleum and / or gas fluid has a partial pressure of carbon dioxide (CO 2 ) of between 50 bar and 100 bar, or even greater than 100 bar and / or a partial pressure of sulfide d 'hydrogen (H2S) greater than 10 mbar, greater than 100 mbar or even greater than 1 bar.
    The flexible pipe (1) comprises a plurality of concentric polymeric, metallic and optionally composite layers, arranged around an axis (A-A ’).
    In the following description, the term "exterior" is understood to mean relatively more radially distant from the axis (A-A ’) of the flexible pipe (1). The term “interior” is understood to mean relatively closer radially to the axis (A-A ’) of the flexible pipe (1).
    The flexible pipe (1) comprises from the outside towards the inside, an external sheath (2) for sealing, an external reinforcement structure (3), an internal sheath (6) and an internal reinforcement structure (8) .
    The external sealing sheath (2) is intended to limit the penetration of water from the body of water into the flexible pipe (1). The external sheath (2) also makes it possible to limit the wear of the flexible pipe (1) during installation for example.
    The outer sheath (2) is in contact with the water in the body of water. The outer sheath (2) has a thickness of between 5 mm and 15 mm. It is for example made of polymeric material chosen for example from a polyolefin such as a polyethylene or a polyamide such as a polyamide 11 or a polyamide 12. According to another example, the material of the outer sheath (2) is a poly (p-phenylene terephthalamide).
    The outer sheath (2) is produced by extrusion of a sealed tubular structure. According to another example, the external sheath (2) is produced by extruding strips, which are then wound up to form a sealed tubular structure.
    The external reinforcement structure (3) is intended to reinforce the flexible pipe (1) against internal radial forces and / or tensile forces.
    The external reinforcement structure (3) is arranged inside the external sheath (2).
    In the example of FIG. 1, the flexible pipe (1) comprises two external reinforcement structures (3) formed of a pair of tensile armor plies (4) and a pressure vault (5).
    The pair of tensile armor plies (4) is intended to reinforce the flexible pipe (1) against the tensile forces linked in particular to the weight of the flexible pipe (1).
    The pair of tensile armor plies (4) is formed by a helical winding of a plurality of armor elements (41). The armor elements (41) are wound in a long pitch characterizing an absolute helix angle between 20 ° and 60 ° and advantageously between 25 ° and 55 °. To ensure the balance of the pair of tensile armor plies (4) under the effect of internal and external pressure, the armor elements (41) of a first tensile armor ply (4) are wound with a helix angle opposite the helix angle of the armor elements (41) of a second layer of traction armor (4).
    The armor elements (41) are for example formed from a metallic material chosen from stainless steels or carbon steels comprising between 0.1% and 0.8% carbon or low alloy steels or a mixture of these materials. Low alloy steels characterize alloys in which the content of each alloying element is less than 5% and in which the manganese content is less than 1%. According to an alternative, the armor elements (41) are formed from a composite material comprising fibers such as carbon fibers embedded in a polymer matrix such as an epoxy resin. According to another embodiment, the polymer matrix is chosen from, for example, a polyolefin such as polyethylene or polypropylene or else a polyaryletherketone such as a polyetheretherketone. The composite material makes it possible to reduce the weight of the pair of tensile armor plies (4) and thus the total weight of the flexible pipe (1).
    The flexible pipe (1) may include one or two pairs of tensile armor plies (4).
    The pressure vault (5) is intended to reinforce the flexible pipe (1) against internal radial forces linked in particular to the pressure prevailing inside the flexible pipe (1). The pressure vault (5) is arranged inside the pair of tensile armor plies (4).
    The pressure vault (5) comprises a helical winding with short pitch of metal profiles. "Short pitch" is understood to mean an helix angle of an absolute value of between 70 ° and 90 °, advantageously 85 °.
    The cross section of the metal profiles of the pressure vault (5) is generally in the form of U, T, K, Z or I.
    Depending on the pressure and temperature conditions, the flexible pipe (1) can be devoid of pressure vault (5).
    In addition, the flexible pipe (1) comprises an internal sheath (6) for protection.
    The internal sheath (6) is arranged inside the reinforcement structure (3). The internal sheath (6) is in particular arranged inside the pressure vault (5). The internal sheath (6) provides protection to the flexible pipe (1) in the event of a loss of tightness of the internal reinforcement structure (8). The internal sheath (6) also constitutes a support having a smooth surface on which the external reinforcement structure (3) is formed. Indeed, the internal reinforcement structure (8) generally has an irregular surface which can weaken the resistance to the radial and / or axial forces of the external reinforcement structure (3).
    The inner sheath (6) is formed from a polymeric material. The polymeric material of the internal sheath (6) is chosen from a polyolefin such as a polyethylene or a polypropylene, a polyamide such as a polyamide 11 or a polyamide 12, a fluorinated polymer such as a polyvinylidene fluoride or a polyaryletherketone such as a polyetheretherketone.
    According to another embodiment, the internal sheath (6) is formed from a composite material comprising reinforcing elements embedded in a polymer matrix. The reinforcing elements are for example carbon fibers and the polymer matrix is formed from a material chosen for example from an epoxy resin, a polyamide, a polyolefin such as a polyethylene or a polypropylene, a polyaryletherketone such as a polyetheretherketone .
    The internal sheath (6) has for example a thickness of between 1 mm and 20 mm. It is generally carried out by extrusion.
    The external sheath (2) and the internal sheath (6) define an annular space (7) in which the external reinforcement structure (3) is arranged.
    The flexible pipe (1) can comprise additional polymeric and / or metallic layers. For example, the flexible pipe (1) may include a thermal insulation sheath arranged for example around the external reinforcement structure (3). The annular space (7) can thus comprise several annular sub-spaces delimited by the internal sheath (6) and by an additional metallic or polymeric layer and / or by the external sheath (2) and by an additional metallic or polymeric layer.
    Advantageously, according to the invention, the external reinforcement structure (3) is free to move longitudinally relative to the external sheath (2) and relative to the internal sheath (6) during bending of the flexible pipe ( 1). In other words, the external reinforcement structure (3) is devoid of connecting material. The flexible pipe (1) is of the unbound type.
    With regard to the geometry, materials, arrangement as well as the manufacture of the external sheath (2), the pair of tensile armor plies (4), the pressure vault (5) and possibly the internal sheath (6), one can for example refer to the normative documents AP117 J, 4 th edition, Mai2014etAP117 B, 5 th edition, May 2014, published by the American Petroleum Institute.
    In addition, the internal tubular reinforcement structure (8) is intended to reinforce the flexible pipe (1) against external radial forces.
    The internal reinforcement structure (8) makes it possible to limit the risks of collapse of the flexible pipe (1) under the effect of hydrostatic pressure in particular, which can go up to 500 bars. The internal reinforcement structure (8) is in contact with the petroleum and / or gas fluid.
    The internal reinforcement structure (8) comprises a profiled strip (9), wound in a helix to form a tubular structure.
    According to the present invention, it is understood by "profiled strip", a strip whose initial cross section has been modified by folding to obtain a final cross section of different geometry. The cross section of the profiled strip (9) is understood to be the section taken along a plane perpendicular to the axis (A-A) of the flexible pipe (1).
    The profiled strip (9) has a thickness of between 0.5 mm and 3.5 mm.
    The thickness of the wall of the internal reinforcing structure (8) is for example greater than or equal to four times the thickness of the profiled strip (9). Advantageously, the thickness of the wall of the internal reinforcing structure (8) is between four times and six times the thickness of the profiled strip (9). This increases the resistance to internal and external pressure of the internal reinforcement structure (8).
    The profiled strip (9) is wound in a helix in a short pitch. "Short pitch" is understood to mean an helix angle of an absolute value of between 70 ° and 90 °, advantageously 85 °.
    The profiled strip (9) is formed from a metallic material resistant to the physico-chemical characteristics of the petroleum and / or gas fluid transported.
    As shown in FIG. 3, according to the invention, the adjacent turns of the profiled strip (9) are stapled. The term stapled means that the adjacent turns of the profiled strip (9) cooperate together so that the axial movement of a turn is limited by an adjacent turn.
    The stapling is intended to reinforce the resistance of the internal reinforcement structure (8) under the effect of the hydrostatic pressure exerted on the flexible pipe (1) and under the effect of the internal pressure.
    As shown in FIG. 3, the stapling of the adjacent turns of the profiled strip (9) delimits an internal axial gap (Ji) opening towards the inside of the flexible pipe (1) and an external axial gap (Je) opening towards the of the flexible pipe (1). The internal sheath (6) being arranged on the internal reinforcement structure (8) tends to flow partially in the external axial joints (I). Furthermore, the internal axial gaps (Ji) define a rough internal surface. The flexible pipe (1) is then said to be a non-smooth passage in the technical field of the invention ("rough bore" in English).
    The internal axial gap (Ji) and the external axial gap (Je) ensure the flexibility of the internal reinforcement structure (8). Indeed, the flexible pipe (1) is stressed in bending during storage, installation and operation of the flexible pipe (1). The amplitude of the internal axial gap (Ji) and the external axial gap (Je) makes it possible to accommodate the radius of curvature of the flexible pipe (1). It is measured along the axis of the flexible pipe (1) between two adjacent areas of adjacent turns.
    For example, FIG. 4A represents a first internal axial gap (Ji1) on the upper surface which results from a significant bending of the flexible pipe (1), that is to say, from a small radius of curvature of the flexible pipe (1). In FIG. 4B, the flexible pipe (1) is less stressed in bending than in FIG. 4A, which results in a second internal axial gap (Ji2) less than (Ji1). In FIG. 4B, the radius of curvature of the flexible pipe (1) is greater than the radius of curvature of the flexible pipe according to FIG. 4A.
    Furthermore, the profiled strip (9) has an S-shaped cross section.
    As shown in FIG. 2, advantageously, the profiled strip (9) has a cross section comprising a first end region (12), a second end region (13) and a central region (14).
    The first end region (12) comprises a free end of lower support (15), an upper support branch (16) connected to the free end of lower support (15) by a first transverse connecting branch (17).
    According to a particularly advantageous embodiment, the free lower support end (15) of the first end region (12) is formed of a first section (22) extending from the first transverse connecting branch ( 17) to a second section (23). The second section (23) has a concavity. The concavity makes it possible to increase the thickness of the wall of the internal reinforcement structure (8) and thus to reinforce its resistance to internal and external pressure. As shown in FIG. 3, the concavity is directed towards the lower support branch (18) of the second end region (13) of an adjacent turn. Advantageously, the free end of the second section (23) of a turn rests and extends over at least part of the lower support branch (18) of an adjacent turn (not shown). This ensures stability of the structure of the profiled strip (9) under the effect of internal or external pressure for example.
    According to another exemplary embodiment not shown, the second section (23) has a concavity directed towards the upper support branch (16) of the first end region (12) of an adjacent turn.
    In addition, the second concave section (23) advantageously has a straight top having a width greater than or equal to half the width of the second section (23).
    Advantageously, the first section (22) and the upper support branch (16) are straight. Advantageously, the upper support branch (16) and the first section (22) are parallel to the axis of the flexible pipe (1). The first transverse connecting branch (17) is advantageously curved.
    The first end region (12) thus forms a first open box when the turns are not stapled.
    The second end region (13) comprises a lower support branch (18), a free upper support end (19) connected to the lower support branch (18) by a second transverse connecting branch (20 ).
    Advantageously, the lower support branch (18) and the upper free support end (19) are straight. The second transverse connecting branch (20) is advantageously curved.
    The second end region (13) thus forms a second open box when the turns are not stapled.
    The central region (14) comprises a third transverse connecting branch (21) connecting the upper support branch (16) of the first end region (12) to the lower support branch (18) of the second region end (13).
    Advantageously, the third transverse connecting branch (21) is curved.
    As shown in FIG. 3, advantageously, the free upper support end (19) of the second end region (13) of a turn is inserted between the free lower support end (15) and the upper support branch (16) of the first end region (12) of an adjacent turn to form the stapling of the internal reinforcement structure (8).
    Thus, the free upper support end (19) of a turn is inserted within the first box of the first end region (12) of an adjacent turn. The free upper support end (19) and the upper support branch (16) are thus superimposed. The side wall of the box opposite the first transverse connecting branch (17) is therefore closed by the second transverse connecting branch (20) of an adjacent turn after stapling.
    Furthermore, as shown in FIG. 3, the profiled strip (9) delimits at least one helical gap (10).
    The helical gap (10) according to the invention is defined as the clearance delimited radially by two adjacent zones of two adjacent turns. The term radially means with respect to the flexible pipe (1) and signifies along a radius of the flexible pipe (1). The amplitude of the helical gap (10) is measured radially between two adjacent zones of two adjacent turns. Advantageously, the amplitude of the helical gap (10) is substantially constant and independent of the radius of curvature of the flexible pipe (1).
    The helical gap (10) is delimited radially by the lower support branch (18) of the second end region (13) of a turn and by the free lower support end (15) of the first end region (12) of an adjacent turn.
    According to another embodiment, the helical gap (10) is delimited radially by the lower bearing branch (18) of the second end region (13) of a turn and by the second section (23) of the free lower support end (15) of an adjacent turn.
    According to another embodiment, the helical gap (10) is delimited radially by the lower support branch (18) of the second end region (13) of a turn and by the first section (22) of the free lower support end (15) of an adjacent turn. Alternatively, the helical gap (10) is delimited radially by the second section (23) of the free upper support end (19) and by the upper support branch (16) of the first end region ( 12) of an adjacent turn.
    According to another embodiment, the helical gap (10) is delimited radially by the free end of upper support (19) of the second end region (13) of a turn and by the free end d 'lower support (15) of the first end region (12) of an adjacent turn.
    According to another embodiment, the helical gap (10) is delimited radially by the free upper support end (19) of the second end region (13) of a turn and by the support branch upper (16) of the first end region (12) of an adjacent turn.
    The profiled strip (9) may include a plurality of helical gaps (10). The exemplary embodiments of the helical gap (10) can be taken in any possible combination.
    For example, the profiled strip (9) may comprise four helical interstices (10), each being respectively delimited radially by the lower bearing branch (18) of the second end region (13) of a turn and by the second section (23) of the free lower support end (15) of an adjacent turn, by the lower support branch (18) of the second end region (13) of a turn and by the first section (22) of the free lower support end (15) of an adjacent turn, via the free upper support end (19) of the second end region (13) of a turn and by the free end of the lower support (15) of the first end region (12) of an adjacent turn, by the free end of the upper support (19) of the second end region (13) of a turn and by the upper support branch (16) of the first end region (12) of an adjacent turn.
    The helical gap (10) represents a path for the passage of petroleum and / or gas fluid from the internal passage of the flexible pipe (1) towards the internal sheath (6). Under high pressure and high temperature, the gas molecules contained in the oil and / or gas fluid such as methane (CH4), carbon dioxide (CO2), hydrogen sulfide (H2S) as well as water in the gaseous state will be able to diffuse through the internal sheath (6) and accumulate within the annular space (7). The fugacity of carbon dioxide (CO2) in the annular space (7) is then generally greater than or equal to 50 bar. The fugacity of hydrogen sulfide (H2S) in the annular space (7) is then generally between 1 bar and 2 bar.
    These gases, combined with water which may come from a tear in the external sheath (2) or from the condensation of water having diffused through the internal sheath (6), can lead to corrosion of the structure of external reinforcement (3) and / or its chemical aging, which can cause the flexible pipe (1) to rupture.
    To limit the risks of rupture of the flexible pipe (1), according to the invention, the internal reinforcement structure (8) further comprises a sealing element (11) wound helically within the helical gap (10 ) intended to limit the passage of petroleum and / or gas fluid from the internal passage to the annular space (7).
    According to an example shown in FIG. 5A, the sealing element (11) is wound in a helix within the helical gap (10) delimited radially by the lower support branch (18) of the second region of end (13) of a turn and via the second section (23) of the free lower support end (15) of an adjacent turn.
    According to another exemplary embodiment shown in FIG. 5B, the sealing element (11) is wound in a helix within the helical interstice (10) delimited radially by the free end of upper support (19) of the second end region (13) of a turn and via the free lower support end (15) of the first end region (12) of an adjacent turn.
    According to another exemplary embodiment shown in FIG. 5C, the sealing element (11) is wound in a helix within the helical interstice (10) delimited radially by the free end of upper support (19) of the second end region (13) of a turn and by the upper support branch (16) of the first end region (12) of an adjacent turn.
    According to another exemplary embodiment shown in FIG. 5D, the sealing element (11) is wound in a helix within the helical gap (10) delimited radially by the lower bearing branch (18) of the second end region (13) of a turn and via the first section (22) of the free lower support end (15) of an adjacent turn.
    The invention makes it possible to maintain the tightness of the reinforcing structure (8) with respect to the petroleum and / or gas fluid transported independently of the radius of curvature of the flexible pipe (1). Indeed, as shown in Figures 4A and 4B, the internal axial gap (Ji) varies depending on the radius of curvature of the flexible pipe (1). According to the present invention, the sealing element (11) is wound in a helix within the gap (11) whose amplitude measured radially relative to the axis of the pipe (1) varies only substantially. Thus, the sealing element (11) performs its function constantly. The flexible pipe (1) is then suitable for both static and dynamic applications.
    To strengthen the sealing of the internal reinforcing structure (8), the latter advantageously comprises a plurality of sealing elements (11).
    The internal reinforcement structure (8) comprises for example between two and four sealing elements (11), each being respectively wound in a helix in the helical interstices (10) as described above.
    Advantageously, the internal reinforcement structure (8) comprises four sealing elements (11), each being respectively wound in a helix in the helical interstices (10) as described above.
    Advantageously, the sealing element (11) fills at least 50% of the volume of the helical gap (10).
    The sealing element (11) has a polygonal cross section, for example of the rectangular, square, hexagonal type.
    Advantageously, the sealing element (11) has a rectangular cross section. This embodiment is particularly suitable for the geometry of the helical gap (10) delimited by the straight branches of the cross section of the profiled strip (9) which makes it possible to strengthen the tightness of the internal reinforcement structure (8). .
    Preferably, the cross section of the sealing element (11) has a width greater than or equal to half the width taken along the axis (A-A ') of the upper support branch (16) or at half the width of the top of the second section (23) of the free lower support end (15). Advantageously, the width of the sealing element (11) is greater than 2 mm. Preferably, the thickness of the sealing element (11) is greater than half the thickness of the profiled strip (9). Advantageously, the thickness of the sealing element (11) is greater than 1.5 mm.
    Alternatively, the sealing element (11) has an oval cross section. This section is particularly suited to the geometry of the helical gap (10) delimited radially by the lower support branch (18) of a turn and by the second section (23) of an adjacent turn, the second section ( 23) having a concavity directed towards the lower support branch (18). The sealing element (11) thus makes it possible to substantially fill the entire volume of the helical gap (10) in order to reinforce the sealing of the internal reinforcement structure (8).
    Alternatively, the sealing element (11) has a circular cross section or any other geometry suitable for the present invention.
    When the internal reinforcing structure (8) comprises a plurality of sealing elements (11), each sealing element (11) may have a different cross section to accommodate the geometry of each helical gap (10).
    The sealing element (11) has a main body made of a material. The material is for example polymeric or metallic.
    The metallic material of the main body is for example chosen from stainless steels, copper alloys or any other material resistant to the chemical nature of the petroleum and / or gas fluid transported under the conditions of transport pressure and temperature. An additional advantage of the sealing element (11) having a main body formed of a metallic material lies in the fact that electrical conductivity measurements can be carried out on the sealing element (11). This makes it possible in particular to detect after the manufacture of the internal reinforcing structure (8) a possible rupture of the sealing element (11).
    According to an alternative, the material of the main body of the sealing element (11) is formed from glass fibers. This also makes it possible to check the integrity of the sealing element (11).
    The polymeric material is for example chosen from a thermoplastic such as a polyarylethketone, in particular a polyetheretherketone. Advantageously, the polymeric material is chosen from a fluorinated polymer such as a polyvinylidene fluoride, a polyolefin such as a polyethylene or a polypropylene, a polyamide, or alternatively a polyarylenesulfide, an elastomer such as a silicone, a fluorosilicone, a chloropene, a copolymer butadiene-acrylonitrile (NBR) styrene.
    Alternatively, the main body is made of a composite or hybrid material.
    Advantageously, the polymeric material of the main body is for example chosen from polymers having a modulus of elasticity measured at 20 ° C. greater than or equal to 2500 MPa.
    The material of the main body may also include fillers intended to reduce the coefficient of friction between the sealing element (11) and the profiled strip (9). The filler material is for example a polytetrafluoroethylene.
    Advantageously, the sealing element (11) comprises a polymeric coating intended to reinforce the sealing of the sealing element (11) with respect to petroleum and / or gas fluid. The polymeric coating is for example formed from a material having a modulus of elasticity measured at 20 ° C less than or equal to 2000 MPa.
    Preferably, the permeability of the polymeric coating with respect to hydrogen sulphide and / or carbon dioxide at a pressure of 40 bar and at a temperature of 80 ° C. is less than the permeability of the main body of the polymer. sealing element (11) vis-à-vis hydrogen sulfide and / or carbon dioxide under the same conditions.
    The sealing element (11) may include at least one reinforcing element intended to reinforce the resistance of the sealing element (11) against pressure. The reinforcing element is for example inserted within the main body of the sealing element (11). The reinforcing element is for example formed from a metallic material or formed from a poly (p-phenyleneterephthalamide).
    According to an exemplary embodiment, the sealing element (11) is fixed to at least part of the profiled strip (9). The fixing is carried out for example by gluing. This keeps the sealing element (11) within the helical gap (10) under the effect of pressure or following bending of the flexible pipe (1).
    According to an embodiment shown in Figure 6, the internal reinforcement structure (8) comprises a sealing resin (24) intended to improve the sealing of the internal reinforcement structure (8). The sealing resin (24) is for example arranged within at least part of the volume of the first box of a turn, the first box being closed laterally by the second transverse connecting branch (20) of a turn adjacent. Advantageously, the sealing resin (24) is arranged within at least part of the volume of the first box of each turn.
    The sealing resin (24) is for example a resin of the epoxy or cyanoacrylate or silicone type.
    The sealing resin (24) is for example injected in the liquid state by an injection orifice (25) produced through the profiled strip (9). The injection orifice (25) is for example made through the superposition of the upper support branch (16) of the first end region (12) of a turn and the free end of the upper support (19) of an adjacent turn, and preferably through each turn.
    Advantageously, at least one verification orifice (not shown) is also produced through the profiled strip (9). The verification orifice makes it possible to control the volume of sealing resin (24) introduced. The verification orifice is an orifice made through the profiled strip (9) on the same turn including the injection port (25) or on an adjacent turn.
    For example, the injection orifice (25) and possibly the verification orifice are made through the profiled strip (9) after the profiled strip (9) is wound and stapled. This embodiment makes it possible to position the injection orifice (25) and the verification orifice along the internal reinforcement structure (8). According to another embodiment, the injection orifice (25) and possibly the verification orifice are produced through the profiled strip (9) before the winding of said profiled strip (9). According to another example, the injection orifice (25) and possibly the verification orifice are produced before the profiling of the strip forming the profiled strip (9).
    The polymerization temperature of the sealing resin (24) is greater than or equal to 10 ° C and preferably between 10 ° C and 35 ° C.
    Advantageously, the sealing resin (24) also closes the injection orifice (25) so as to limit the leakage paths of the petroleum and / or gas fluid.
    A method of manufacturing the flexible pipe (1) for transporting an oil and / or gas fluid intended to be immersed in a body of water will now be described.
    The method of manufacturing the flexible pipe (1) comprises the following steps (a) helically winding a profiled strip (9) to form an internal reinforcement structure (8) tubular intended to reinforce the flexible pipe (1) against forces external radials acting on the flexible pipe (1), the adjacent turns of the profiled strip (9) being stapled, the profiled strip (9) delimiting at least one helical gap (10), (b) providing around the structure of internal reinforcement (8), an internal sheath (6) for protection, (c) providing around the internal sheath (6) polymeric sealing, an external reinforcement structure (3) made of metal intended to reinforce the flexible pipe (1) against internal radial forces and / or tensile forces, (d) provide around the external reinforcement structure (3), an external sheath (2) polymeric sealing intended to limit the penetration of water from the body of water within the flexible pipe (1), the external sheath (2) and the internal sheath (6) delimit an annular space (7) in which the external reinforcement structure (3) is arranged, step (a) further comprising l next step: wind helically at least one sealing element (11) intended to limit the passage of petroleum and / or gas fluid from the internal passage to the annular space (7) within the helical gap (10) .
    For example, a precursor strip is loaded on a first reel.
    Advantageously, the precursor strip comprises one or more injection orifices (25) and optionally for verification.
    The sealing element (11) is loaded on a second coil.
    The precursor strip is unwound and introduced into a roll forming machine. The precursor strip is folded within the roll forming machine to form the profiled strip (9).
    Then, the profiled strip (9) is wound in a helix in a short pitch, advantageously around a mandrel. By "short pitch" is meant an helix angle of an absolute value between 70 ° and 90 °, advantageously 85 °. The rolled profiled strip (9) delimits a helical gap (10).
    The sealing element (11) is unwound and wound in a helix within the helical gap (10) simultaneously with the winding of the profiled strip (9). This facilitates the insertion of the sealing element (11) within the helical gap (10).
    The turns of the profiled strip (9) are then stapled by plating members arranged around the mandrel which exert pressure on the turns of the profiled strip (9).
    Advantageously, after this step, one or more injection orifices (25) and possibly verification orifices are made through the profiled strip (9). According to another embodiment, the injection port (s) (25) are produced before the precursor strip is introduced into the roll forming machine.
    Around the internal reinforcement structure (8), the internal sheath (6) is formed. For example, the internal sheath (6) is directly extruded around the internal reinforcement structure (8).
    Then, around the internal sheath (6) there is at least one external reinforcement structure (3). Advantageously, there are two external reinforcement structures (3), for example, a pressure vault (5) then a pair of tensile armor plies (4).
    For example, a metal profile is loaded onto a coil. Then the metal profile is unwound and arranged in a helix around the internal sheath (6) in a short step to form the pressure vault (5). By "short pitch" is meant an helix angle of an absolute value between 70 ° and 90 °, advantageously 85 °.
    We then load on several coils, armor elements (41) which are unwound and which are simultaneously arranged in a helix in a long step around the pressure vault (5) to form the pair of plies of traction armor (4). By "long pitch" is meant an helix angle of an absolute value between 20 ° and 60 ° and advantageously between 25 ° and 55 °.
    Then, the outer sheath (2) is formed. For example, the outer sheath (2) is extruded directly around the pair of tensile armor plies (4). Alternatively, strips are extruded and then said strips are wrapped around the external reinforcement structure (3).
    The annular space (7) is thus formed between the internal sheath (6) and the external sheath (2) in which the external reinforcement structure (3) is arranged.
    A flexible pipe is thus formed for which the risks of ruptures are limited.
    The integrity of the internal reinforcement structure (8) according to the invention is advantageously tested by injecting a fluid, under a pressure generally greater than the operating pressure as determined in particular in the normative documents of the American Petroleum Institute, within the reinforcement structure (8) for example.
    The fluid is for example a liquid such as water or an oil. According to another embodiment, the fluid is a gas such as compressed air.
    The fluid can be injected after the internal reinforcement structure (8) has been produced.
    Sealing means are then mounted at the ends of the internal reinforcing structure (8).
    According to another embodiment, the fluid is injected after the formation of the internal sheath (6). According to this embodiment, the fluid is injected into the reinforcement structure (8) or into the volume between the internal sheath (6) and the reinforcement structure (8).
    权利要求:
    Claims (16)
    [1" id="c-fr-0001]
    1. Flexible pipe (1) for transporting an oil and / or gas fluid intended to be immersed in a body of water comprising from the outside to the inside of said flexible pipe (1):
    - an external sheath (2) for sealing intended to limit the penetration of water from the body of water into the flexible pipe (1),
    - at least one external reinforcement structure (3) intended to reinforce the flexible pipe (1) against internal radial forces and / or tensile forces,
    - an internal protective sheath (6),
    an annular space (7) delimited by the external sheath (2) and the internal sheath (6), the external reinforcement structure (3) being arranged within said annular space (7),
    - a tubular internal reinforcement structure (8) intended to reinforce the flexible pipe (1) against external radial forces exerted on the flexible pipe (1) comprising:
    - a profiled strip (9), wound in a helix to form the tubular internal reinforcement structure (8), the adjacent turns of said profiled strip (9) being stapled, said profiled strip (9) delimiting at least one helical gap (10) , characterized in that the internal reinforcing structure (8) further comprises:
    - At least one sealing element (11) intended to limit the passage of petroleum and / or gas fluid from the internal passage to the annular space (7), said sealing element (11) being wound in a helix within 'at least one helical gap (10).
    [2" id="c-fr-0002]
    2. Flexible pipe (1) according to claim 1 characterized in that the profiled strip (9) has a cross section comprising:
    - A first end region (12) comprising a free end of lower support (15), an upper support branch (16) connected to the free end of lower support (15) by a first connecting branch transverse (17),
    - a second end region (13) comprising a lower support branch (18), a free upper support end (19) connected to the lower support branch (18) by a second transverse connecting branch ( 20)
    - A central region (14) comprising a third transverse branch (21) connecting the upper support branch (16) of the first end region (12) to the lower support branch (18) of the second region d end (13), and in that the free upper support end (19) of the second end region (13) of a first turn is inserted between the free lower support end (15) and the upper support branch (16) of the first end region (12) of an adjacent turn to form the stapling of the internal reinforcement structure (8).
    [3" id="c-fr-0003]
    3. flexible pipe (1) according to claim 2 characterized in that the helical gap (10) is delimited radially by the lower support branch (18) of the second end region (13) of the first turn and by the free lower support end (15) of the first end region (12) of the adjacent coil, and / or by the upper free support end (19) of the second end region ( 13) of the first turn and through the free lower support end (15) of the first end region (12) of the adjacent turn, and / or through the upper free support end (19) of the second end region (13) of the first turn and by the upper support branch (16) of the first end region (12) of the adjacent turn.
    [4" id="c-fr-0004]
    4. flexible pipe (1) according to claim 2 or 3 characterized in that the free lower support end (15) of the first end region (12) of a turn comprises a first section (22) s extending from the first transverse connecting branch (17) to a second section (23) having a concavity directed towards the lower supporting branch (18) of the second end region (13) of the adjacent turn.
    [5" id="c-fr-0005]
    5. Flexible pipe according to claim 4 characterized in that the helical gap (10) is delimited radially by the lower support branch (18) of a turn and by the second section (23) of the free end d 'lower support (15) of an adjacent turn.
    [6" id="c-fr-0006]
    6. flexible pipe (1) according to claim 2 or 3 characterized in that the free end of upper support (19) of the second end region (13) of a turn comprises a first section (22) s extending from the second transverse connecting branch (20) to a second section (23) having a concavity directed towards the upper supporting branch (16) of the first end region (12) of the adjacent coil and in that that a helical gap (10) is further delimited by said second section (23) of the free end of upper support (19) and by the upper support branch (16) of the first end region ( 12) of an adjacent turn.
    [7" id="c-fr-0007]
    7. Flexible pipe (1) according to one of the preceding claims, characterized in that the internal reinforcement structure (8) comprises a plurality of sealing elements (11).
    [8" id="c-fr-0008]
    8. Flexible pipe (1) according to one of the preceding claims, characterized in that the sealing element (11) has an oval cross section.
    [9" id="c-fr-0009]
    9. Flexible pipe (1) according to one of claims 1 to 7 characterized in that the sealing element (11) has a rectangular cross section.
    [10" id="c-fr-0010]
    10. Flexible pipe (1) according to claim 9 characterized in that the sealing element (11) has a thickness less than or equal to half the thickness of the profiled strip (9).
    [11" id="c-fr-0011]
    11. Flexible pipe (1) according to any one of the preceding claims, characterized in that the sealing element (11) comprises a main body formed of a polymeric or metallic material.
    [12" id="c-fr-0012]
    12. Flexible pipe (1) according to claim 11 characterized in that the polymeric material is chosen from a thermoplastic or an elastomer or a thermoplastic elastomer.
    [13" id="c-fr-0013]
    13. Flexible pipe (1) according to claim 11 or 12 characterized in that the material comprises fillers intended to reduce the coefficient of friction between the sealing element (11) and the profiled strip (9).
    [14" id="c-fr-0014]
    14. Flexible pipe (1) according to any one of the preceding claims, characterized in that the sealing element (11) comprises a polymeric coating intended to reinforce the sealing of said sealing element (11) vis-à-vis screw of the oil and / or gas fluid.
    [15" id="c-fr-0015]
    15. Flexible pipe (1) according to any one of the preceding claims, characterized in that the sealing element (11) comprises at least one reinforcing element intended to reinforce the resistance of the sealing element (11) vis-à-vis the pressure.
    [16" id="c-fr-0016]
    16. Flexible pipe (1) according to any one of the preceding claims, characterized in that the sealing element (11) is fixed to at least part of the profiled strip (9), for example by gluing.
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2020016325A1|2020-01-23|
    EP3824212A1|2021-05-26|
    FR3084130B1|2021-12-31|
    BR112021000746A2|2021-04-13|
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    法律状态:
    2019-07-04| PLFP| Fee payment|Year of fee payment: 2 |
    2020-01-24| PLSC| Publication of the preliminary search report|Effective date: 20200124 |
    2020-07-28| PLFP| Fee payment|Year of fee payment: 3 |
    2021-07-27| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1800769A|FR3084130B1|2018-07-18|2018-07-18|FLEXIBLE PIPE FOR THE TRANSPORT OF AN OIL AND/OR GAS FLUID INTENDED TO BE SUBMERGED IN A BODY OF WATER|FR1800769A| FR3084130B1|2018-07-18|2018-07-18|FLEXIBLE PIPE FOR THE TRANSPORT OF AN OIL AND/OR GAS FLUID INTENDED TO BE SUBMERGED IN A BODY OF WATER|
    EP19740385.0A| EP3824212A1|2018-07-18|2019-07-17|Flexible pipe for transporting a gas and/or petroleum fluid and intended to be submerged within a body of water|
    PCT/EP2019/069293| WO2020016325A1|2018-07-18|2019-07-17|Flexible pipe for transporting a gas and/or petroleum fluid and intended to be submerged within a body of water|
    BR112021000746-6A| BR112021000746A2|2018-07-18|2019-07-17|FLEXIBLE TUBE FOR THE TRANSPORT OF A PETROLEUM AND / OR GASEOUS FLUID INTENDED TO BE SUBMERSED WITHIN A BODY OF WATER|
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