• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The method comprises the following steps: - arranging, around an end section (32) of the pressure sheath (20), a crimping ring (74); placing, around the end section (32) and the crimping ring (74), an end vault (50) of the end piece (14), the end vault (50) having a cooperating surface (64) with the crimping ring (74); relative displacement of the crimping ring (74) with respect to the cooperation surface (64) for crimping the crimping ring (74) in the pressure sheath (20). The method comprises, before the relative displacement step, a heating step of the end section (32) of the pressure sheath (20), suitable for reducing the Young's modulus of the polymer material of the end section ( 32) of the pressure sheath (20) and to maintain a reduced Young's modulus during the relative displacement step.
    公开号:FR3035171A1
    申请号:FR1553484
    申请日:2015-04-20
    公开日:2016-10-21
    发明作者:Gregory Peckeu；Julia Pinson；Antoine Colmard
    申请人:Technip France SAS；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION The present invention relates to a method for producing a seal in a nozzle of a flexible pipe comprising a pressure sheath, comprising the steps following: - provision, around an end section of the pressure sheath, a crimping ring intended to be introduced into the pressure sheath; placing, around the end section and the crimping ring, an end vault of the endpiece, the end vault having a surface of cooperation with the crimping ring, suitable for pushing the ring of crimping radially in the pressure sheath; relative displacement of the crimping ring with respect to the cooperation surface for crimping the crimping ring in the pressure sheath. The flexible pipe is advantageously an unbonded flexible pipe for the transport of hydrocarbons through a body of water, such as an ocean, a sea, a lake or a river. Alternatively, the flexible line is an umbilical reinforced by armor elements or a cable. Such a flexible pipe is for example made according to the normative documents API 17J (Specification for Unbounded Flexible Pipe) and API RP 17B (Recommended Practice for Flexible Pipe) established by the American Petroleum Institute. Alternatively, the flexible pipe is dedicated to drilling and refining applications, bearing the acronym "DRAPS", manufactured and marketed by the Applicant. This flexible pipe is for example an exhaust pipe ("choke line" in English) and sealing ("kill line" in English) as described by the normative document prepared by the American Petroleum Institute, the 16C API. Preferably, this type of pipe is intended to be disposed in a body of water but it can, sometimes, be used on land on the continent. The pipe is generally formed of a set of concentric and superposed metal and polymeric layers. It is considered as "unbound" in the sense of the present invention since at least one of the layers of the pipe is able to move longitudinally relative to the adjacent layers during bending of the pipe. In particular, an unbonded pipe is a pipe devoid of binding materials connecting layers forming the pipe. The pipe is generally disposed across a body of water, between a bottom assembly for collecting the fluid operated in the bottom of the body of water and a set of floating or stationary surface for collecting and distributing the fluid.
    [0002] The surface assembly may be a semi-submersible platform, an FPSO or other floating assembly. Some of these pipes are used in very severe conditions. Thus, the transported hydrocarbons can have a very high pressure and temperature, for example a pressure of between 500 bar and 1500 bar, and a temperature of between 110 ° C. and 130 ° C. In addition, in the case where the pipe is immersed at great depth, it must be able to withstand a very high external pressure, for example of the order of 250 bar if the pipe is submerged at 2500 meters deep.
    [0003] In order to respond to such performances, it is known to use pressure sheaths made from high performance polymer materials which preferably have a Young's modulus of at least 2000 MPa, such as, for example, PEK (polyetherketone). ), PEEK (polyetheretherketone), PEEKK (polyetheretherketoneketone), PEKK (polyetherketoneketone), PEKEKK 15 (polyetherketoneetherketoneketone), PAI (polyamide-imide), PEI (polyether-imide), PSU (polysulfone), PPSU (polyphenylsulfone), PES (polyethersulfone), PAS (polyarylsulfone), PPE (polyphenylene ether), PPS (phenylene polysulfide) LCP (liquid crystal polymers), PPA (polyphthalamide) and / or their mixtures or still mixed with PTFE (polytetrafluoroethylene) or PFPE (perfluoropolyether). The use of these materials can cause problems when making the seal around the pressure sheath, during assembly of the tips. Indeed, during this assembly, a ring is crimped at the outer face of the pressure sheath to be embedded in it. The pressure vault is urged axially along the pipe, so that the crimp ring contacts an inclined surface of the pressure vault. This generates a radial pressure or "swelling" on the crimping ring, which penetrates radially into the thickness of the pressure sheath. This being done, the pressure sheath is crimped and sealing is performed.
    [0004] This operation is easily performed for pressure sheaths made from polymeric materials which have a low Young's modulus in the usual temperature range for this type of operation, for example [-10 ° C; + 40 ° C]. However, for some high performance polymer materials, the crimping operation is much more complicated. Indeed, their Young's modulus is higher, in the above-mentioned temperature range, crimping is much more difficult.
    [0005] 3035171 3 To crimp polymer sheaths made from high performance materials while keeping the same tip design, it is necessary to use hydraulic devices developing several tens of tons of thrust, in order to position the vault of the tip around the end of the pipe.
    [0006] The application of such a force may further cause a deformation of the metal carcass (in the case where the pipe is type "rough-boron") may lead to a loss of tightness in the tip. An object of the invention is therefore to facilitate the crimping of the pressure sheath during assembly of end caps, especially when the pressure sheath is made from high performance polymer materials. For this purpose, the subject of the invention is a process of the aforementioned type, characterized in that the process comprises, before the step of relative displacement, a step of heating the end section of the pressure sheath, suitable for reducing the Young's modulus of the polymeric material of the end section of the pressure sheath and to maintain a reduced Young's modulus during the relative displacement step. The method according to the invention may comprise one or several of the following characteristics, taken separately or in any technically possible combination: the Young's modulus of the polymer material of the end section of the pressure sheath, during the step of relative displacement, is less than 1000 MPa, and is in particular between 50 MPa and 500 MPa. the temperature of the end section of the pressure sheath, during the relative displacement step, is greater than the ambient temperature. the temperature of the end section of the pressure sheath, during the step of relative displacement, is greater than 50 ° C. and is in particular between 100 ° C. and 200 ° C. the pressure sheath is made from a polymeric material selected from PVDF, PEK, PEEK, PEEKK, PEKK, PEKEKK, PAI, PEI, PSU, PPSU, PES, PAS , EPP, PPS, LCP, APP and / or their mixtures. The end section of the pressure sheath is heated from the outside during the heating step. an outer surface of the end section of the pressure sheath is heated by direct contact of a heating element with the pressure sheath and / or with the crimping ring. The step of placing the end vault is carried out before the heating step, the heating step comprising heating the end vault by direct contact of the end vault with an element heating, and heating an outer surface of the end portion of the pressure sheath through the end vault. the heating element is a heating band and / or a heating blanket. The end section of the pressure sheath is heated from the inside during the heating step. - The end section of the pressure sheath is disposed around an inner carcass defining an internal fluid circulation passage, the heating step comprising heating the interior of the inner carcass. The internal carcass is heated by a heating mandrel and / or by circulation of hot air in the fluid circulation passage. a cannula is interposed between a sacrificial sheath disposed around the inner carcass and the intermediate section of the pressure sheath, the cannula being heated at the heating stage by the internal carcass, an internal surface of the end section of the pressure sheath being heated by the cannula. the method as defined above comprises a step of measuring the temperature of the end section of the pressure sheath during the heating step. the relative displacement of the crimping ring with respect to the end vault is a radial displacement along an axis of the flexible pipe.
    [0007] The invention will be better understood on reading the following description, given solely by way of example, and with reference to the appended drawings, in which: FIG. 1 is a partly broken perspective view of a first flexible pipe according to the invention; FIG. 2 is a partial view, taken in section along a median axial plane, of the tip of the first flexible pipe according to the invention; - Figure 3 is a partial view of the relevant parts of a tip of the flexible pipe of Figure 1, during assembly, during the implementation of the method of producing a seal according to the invention; FIG. 4 is a view similar to FIG. 3, in one variant of the method for producing a seal according to the invention; - Figure 5 is a view similar to Figure 4, for the tip of another flexible pipe; Figure 6 is a view similar to Figure 2 of the tip of yet another flexible pipe.
    [0008] In all that follows, the terms "outside" and "inside" are generally understood radially with respect to an axis XX 'of the pipe, the term "outside" being understood to be relatively more radially distant from the pipe. XX 'axis and the term "inner" extending relatively more radially closer to the axis XX' 5 of the pipe. The terms "forward" and "rear" are axially related to an axis XX 'of the pipe, the term "before" meaning relatively further from the middle of the pipe and closer to one of its ends, the term "back" meaning relatively closer to the middle of the pipe and further away from one of its ends. The middle of the pipe is the point of the pipe situated equidistant from the two extremities of the latter. A first method of producing a seal according to the invention is implemented during the assembly of a tip 14 of a flexible pipe 10 to be introduced into a body of water to carry a fluid.
    [0009] The flexible pipe 10 comprises a central section 12 illustrated in part in FIG. 1. It comprises, at each of the axial ends of the central section 12, an end tip 14 whose relevant parts are shown in FIG. FIG. 2, in addition to the endpiece 14, is shown a portion of the central section 12 adjacent to the endpiece 14.
    [0010] With reference to FIG. 1, the flexible pipe 10 delimits a central passage 16 for circulating a fluid, advantageously a petroleum fluid. The central passage 16 extends along an axis X-X 'between the front end and the rear end of the flexible pipe 10. It opens through the end pieces 14. In all that follows, we define, also, a radial axis YY 'perpendicular to the axis XX' and situated in a median axial plane of the flexible pipe 10, as can be seen in FIG. 2. The flexible pipe 10 is intended to be disposed through an expanse of water ( not shown) in a fluid operating installation, including hydrocarbons.
    [0011] The body of water is, for example, a sea, a lake or an ocean. The depth of the body of water, at the right of the fluid exploitation installation, is for example between 500 m and 3500 m. The fluid operating installation comprises a particularly floating surface assembly and a bottom assembly (not shown) which are generally interconnected by the flexible pipe 10.
    [0012] Alternatively, as mentioned above, the flexible pipe is disposed on the ground, on the continent. The flexible pipe 10 is preferably an "unbonded" pipe (referred to as "unbonded").
    [0013] At least two adjacent layers of the flexible pipe 10 are free to move longitudinally with respect to each other during bending of the pipe. Advantageously, all the layers of the flexible pipe are free to move relative to each other. Such conduct is for example described in the normative documents published by the American Petroleum Institute (API), API 17J, API 10 RP17B and API 16C. As illustrated in FIG. 1, the flexible pipe 10 delimits a plurality of concentric layers around the axis X-X 'which extend continuously along the central section 12 to the end-pieces 14 situated at the ends of the pipe. According to the invention, the flexible pipe 10 comprises at least a first tubular sheath 20 based on a polymer material advantageously constituting a pressure sheath. Advantageously, the flexible pipe 10 comprises several polymeric tubular sheaths such as an intermediate sheath or sacrificial sheath 22. It may comprise one or two polymeric sheaths in addition to the pressure sheath 20. The flexible pipe 10 further comprises at least one layer tension armor 24, 25 disposed externally of the first sheath 20 forming a pressure sheath. In this example, the flexible pipe 10 further comprises an internal carcass 26 disposed inside the sacrificial sheath 22, the pressure sheath 20 disposed above the sacrificial sheath 22, a pressure vault 28 interposed between the sheath 20 and the at least one layer of tensile armor 24, 25 and an outer sheath 30 for protecting the flexible pipe 10. The sacrificial sheath 22 is for example made from a polyolefin such as polyethylene, based on a polyamide such as PA11 or PA12, or based on a fluorinated polymer such as polyvinylidene fluoride (PVDF).
    [0014] In a variant, an additional polymeric sheath made from the same polymeric materials as those of the sacrificial sheath 22 is disposed between the pressure sheath 20 and the pressure vault 28. In a known manner, the pressure sheath 20 is intended for sealing the fluid conveyed in the passage 16. It is formed of a polymeric material, for example based on a PAEK (polyaryletherketone) such as PEEK (polyetheretherketone), PEKK (polyetherketoneketone), PEK (polyetherketone) , PEEKK (polyetheretherketoneetherketone), or for example based on a PSU (polysulfone) such as PPSU (polyphenylsulfone), PES (polyethersulfone), PAS (polyarylsulfone) or based on a polyimide (PI) such as PAI (polyamide-imide), PEI (polyether-imide), or based on a PPE 5 (polyphenylene ether), a PPS (polyphenylene sulfide), LCP (polymers liquid crystal), a PPA (polyphthalamide), a COC (cyclic olefin copolymer) and / or their mixtures or mixed with a fluorinated or perfluorinated lubricant compound PTFE (polytetrafluoroethylene) or PFPE (perfluoropolyether). Alternatively, the pressure sheath 20 is made of a polyolefin such as polyethylene, based on a polyamide such as PA11 or PA12, or based on a fluorinated polymer such as polyvinylidene fluoride. (PVDF) or based on a fluorinated copolymer based on vinylidene fluoride. The polymeric material forming the pressure sheath 20 exhibits a Young's modulus at room temperature, for example at 23 ° C. ± 2 ° C., of between 100 MPa and 4000 MPa, as measured by the ISO 527-1 standard: 2012 or ASTM D638-10. Advantageously, the module is between 2000 MPa and 4000 MPa, as measured by this standard. The thickness of the pressure sheath 20 is for example between 5 mm and 20 mm.
    [0015] The pressure sheath 20 has an end section 32 inserted into the endpiece 14. The carcass 26 is formed for example of a profiled metal strip, wound in a spiral. The turns of the strip are advantageously stapled to each other. The main function of the carcass 26 is to resume the radial forces of crushing.
    [0016] In this example, the carcass 26 is disposed inside the pressure sheath 20. The pipe is then designated by the term "rough bore" because of the geometry of the carcass 26. The carcass 26 is suitable for come into contact with the fluid flowing in the sacrificial sheath 22.
    [0017] The helical winding of the profiled metal strip forming the carcass 26 is short-pitched, that is to say it has a helix angle of absolute value close to 90 °, typically between 75 ° and 90 ° . The main function of the pressure vault 28 is to take up the radial forces related to the pressure prevailing inside the pressure sheath 20. The pressure vault 28 is for example formed of a metallic profiled wire surrounded by a helix around and outside the sheath 20. The profiled wire generally has a complex geometry, especially in the form of Z, T, U, K, X or I. The pressure vault 28 is wound in short pitch helix around the pressure sheath 20, that is to say with a helix angle of absolute value close to 90 °, typically between 75 ° and 90 °. The pressure vault 28 has an end region 35 inserted into the tip 14, outside the end section 32 of the pressure sheath 20. The end portion 32 of the pressure sheath 20 protrudes axially forwardly beyond the end region 35 of the pressure vault 28.
    [0018] The flexible pipe 10 according to the invention comprises at least one armor layer 24, 25 formed of a helical winding of at least one elongate armor element 29. In the example shown in FIG. 2, the flexible pipe 10 comprises a plurality of armor layers 24, 25, in particular an inner armor layer 24, applied to the pressure vault 28 and an outer armor layer 25. around which the outer sheath 30 is disposed. Each layer of armor 24, 25 has longitudinal armor elements 29 wound with a long pitch around the axis XX 'of the pipe. By "wound with a long pitch" is meant that the absolute value of the helix angle is less than 60 °, and is typically between 25 ° and 55 °.
    [0019] The main function of the armor layers 24, 25 is to take up the axial tensile forces exerted on the flexible pipe 10, in particular those related to the hanging weight in the case of a rising pipe. The armor elements 29 a first layer 24 is generally wound at an opposite angle to the armor elements 29 of a second layer 25. Thus, if the winding angle of the armor elements 29 of the first layer 24 is equal to + a, a being between 25 ° and 55 °, the angle of winding armor elements 29 of the second layer of armor 25 disposed in contact with the first layer of armor 24 is for example equal to - a °. The weave elements 29 are for example formed by metal wires, in particular steel wires, or by ribbons made of composite material, for example carbon fiber-reinforced tapes. As will be seen below, the armor elements 29 each have an end portion 34 inserted into the endpiece 14. The end portion 34 extends to a free end 36 disposed in the endpiece 14 It advantageously has a pseudo-helical path of axis XX 'in the tip 14, the helix winding on a conical envelope.
    [0020] In the example shown in FIG. 2, for each armor layer 24, 25, the end sections 34 of the armor elements 29 extend divergently away from the X axis. X ', then converging towards the axis XX' from a rear separation point 61A towards a free front end 36.
    [0021] The outer sheath 30 is intended to prevent the permeation of fluid from outside the flexible pipe 10 inwardly. It is advantageously made of a polymer material, in particular based on a polyolefin, such as polyethylene, or based on a polyamide, such as PA11 or PA12. The thickness of the outer sheath 30 is for example between 5 mm and 10 mm. As illustrated in FIG. 2, in addition to the end sections 34 of the armor elements 29, the end section 32 of the pressure sheath 20, the end section 32A of the sacrificial sheath 22 (visible in the figures 3 and 4) and the end region 35 of the pressure vault 28, each end 14 has an end vault 50 and an outer connecting bonnet 51 projecting axially rearwardly from the vault 50. The cover 51 delimits, with the end vault 50, a chamber 52 for receiving the end sections 34 of the armor elements 29, and the end region 35 of the arch 28. The end piece 14 comprises, furthermore, a sealing assembly 54 around the pressure sheath 20 and a rear sealing assembly 56 around the outer sheath 30. In this example, the end vault 50 is for connecting the flexible pipe 10 to another connection tip 14 or to equipments terminals, advantageously via an end flange 60.
    [0022] The end vault 50 has a central bore 61 for receiving the end of the pressure sheath 20 and allowing the flow of fluid flowing through the central passage 16 to the outside of the flexible pipe 10. end vault 50 has at the rear, facing the cover 51, a support skirt 62 of the end sections 34 of the armor elements 29.
    [0023] The skirt 62 defines an outer peripheral surface 63, here of frustoconical shape converging forwards, an inner peripheral surface 64 for cooperation with the front sealing assembly 54, and a transverse rear annular surface 65, connecting the peripheral surface. 63 to the inner peripheral surface 64. The cooperation surface 64 has a divergent shape away from the XX 'axis rearwardly, intended to cooperate with the front sealing assembly 54.
    [0024] The cover 51 has a tubular peripheral wall 70 extending about the axis X-X '. The peripheral wall 70 has a leading edge 71 fixed to the end vault 50, radially spaced from the armor layers 24, 25 and a rear edge 72 extending axially rearward beyond the arch. 50 end.
    [0025] The cover 51 delimits the chamber 52 radially outwards. A filler material advantageously fills the chamber 52. The filler material is, for example, an epoxy resin. The front sealing assembly 54 is advantageously located at the front of the nozzle 14, in contact with the end vault 50.
    [0026] It comprises a crimping front ring 74 intended to engage on the pressure sheath 20 during the implementation of the method according to the invention, a rear flange 76 bearing on the front ring 74, and a set 78 clamping the rear flange 76 on the end vault 50 to block the axial displacement of the front ring 74 when axially moving the end vault 50 to position it around the end portion 32 of In the example illustrated in FIG. 3, the front sealing assembly 54 further comprises a cylindrical cannula 80 for supporting the end section 32, interposed between the sacrificial sheath 22 and the d-section. end 32 of the pressure sheath 20, axially opposite the crimping front ring 74.
    [0027] The front ring 74 is wedged under the engagement surface 64. It is adapted to deform radially inwardly in the end section 32 of the pressure sheath 20, by wedge effect, during axial displacement. towards the rear of the end vault 50 while the front ring 74 is axially locked by the rear flange 76. The ring 74 advantageously has a tapered front edge having an annular bulge. Thus, during the axial displacement towards the rear of the end vault 50, the tapered front edge of the ring 74 bears on the cooperation surface 64 causing a relative displacement of the ring 74 with respect to the end vault. 50. The relative displacement of the ring 74 with respect to the end vault 50 is a radial displacement along the axis XX 'of the flexible pipe 10. In this way, the annular bulge of the tapered front edge of the front ring 74 enters the end portion 32 and provides an annular seal by crimping the ring 74. The rear flange 76 is wedged between the end of the pressure vault 28 and the rear of the crimp ring 74. It is adapted to abut against the transverse surface 65 of the end vault 50 during assembly of the clamping assembly 78.
    [0028] The clamping assembly 78 here comprises screws adapted to fit into the supporting skirt 62 of the end vault 50 through the rear flange 76 and the transverse surface 65. The cannula 80 is cylindrical in shape. 'X-X axis'. It is wedged around the sacrificial sheath 22. It has a tapered rear end 82 for detaching the end section 32 after the insertion of the cannula 80. The rear sealing assembly 56 is placed at the rear of the assembly before sealing 54. It comprises at least one crimping rear ring 82 crimping the outer sheath 30, and a rear clamp 84 for clamping the rear ring 82, on the cover 51, advantageously at the edge rear 72 of the peripheral wall 70. For the implementation of the method according to the invention, a heating equipment 90, shown schematically in Figure 3, is used to locally heat the end portion 32 of the polymer material forming the sheath 20 to reduce its Young's modulus. In the example illustrated in FIG. 3, the heating equipment 90 comprises a heating element 92 placed in contact with the end section 32 of the pressure sheath 20 and / or the crimping front ring 74, for heating the end section 32 of the pressure sheath 20 from the outside.
    [0029] The heating equipment 90 here also comprises a heating mandrel 94 introduced into the carcass 26 for heating the end section 32 of the pressure sheath 20 from the inside. The heating element 92 is for example a heating blanket, wound around the sheath 20 and the ring 74 and / or a heating band. The heating element 92 is adapted to heat the end section 32 by direct contact with the end section 32 or through the crimping ring 74. The heating mandrel 94 is preferably placed in contact with the carcass 26. It is adapted to heat the end section 32 through the sacrificial sheath 22 and / or the cannula 80.
    [0030] A method of producing a seal according to the invention will now be described, when mounting the nozzle 14 at the end of the central section 12 of the flexible pipe 10. Initially, the central section 12 is provided. An end portion of the outer sheath 30 is cut to reveal the end portions 34 of the armor members 29, and below, the pressure vault 28, the pressure sheath 20, the sacrificial sheath 22, and the internal carcass 26.
    [0031] The elements constituting the rear sealing assembly 56 and the cover 51 are engaged around the outer sheath 30 and are moved backwards. The weave elements 29 are radially spaced from the end portion 32 of the pressure sheath 20 and an end portion of the arch 28 is cut to reveal the end portion 32 of the pressure sheath 20. The cannula 80 is then placed between the end section 32 and the sacrificial sheath 22. The rear support flange 76 is engaged around the end section 32 and is moved rearwardly. The crimping ring 74 is then mounted around the end section 32 until it abuts against the rear flange 76. In the example shown in FIG. 3, the heating element 92 is then put in place. It is wrapped around the crimp ring 74 and the end portion 32 to contact the end portion 32 and the crimp ring 74 that it covers.
    [0032] Similarly, the heating mandrel 94 is introduced into the carcass 26 and is placed axially facing the end section 32, the crimping ring 74 and the cannula 80. Advantageously, temperature probes are placed in contact with the section 32 between the heating element 92 and the end section 32.
    [0033] The heating element 92 and the heating mandrel 94 are then activated to increase the temperature of the end section 32 of the pressure sheath 20 to a temperature above room temperature. Preferably, the temperature of the end section 32 is increased to a set temperature of between 100 ° C and 200 ° C.
    [0034] Advantageously, this temperature is greater than 50 ° C., to ensure, after crimping, the relaxation of stresses. The temperature of the end section 32 of the pressure sheath 20 is chosen so that the Young's modulus of the polymer material of the end section 32 after heating is less than 1000 MPa, and is especially between 50 MPa and 500 MPa. This being done, the heating element 92 is removed and the end vault 50 is engaged around the pressure sheath 20 to place the supporting skirt 62 facing the end section 32. The crimping ring 74 is then disposed in contact with the internal cooperation surface 64.
    [0035] The clamping assembly 78 is in place to lock axially rearwardly the rear bearing flange 76. The end vault 50 is moved axially rearwardly. By wedge effect, the tapered front edge of the crimp ring 74 is supported on the inner cooperating surface 64 and deforms radially toward the X-X 'axis in the end portion 32 to provide annular crimping sealing. The radial penetration depth of the ring 74 is, for example, greater than 20% of the local thickness of the end section 32 of the pressure sheath 20. The Young's modulus of the polymeric material of the end section 32 having been locally lowered, it is possible to crimp sheaths made based on high performance polymers having a high Young's modulus at room temperature, preferably greater than or equal to 2000 MPa, with a greatly reduced crimping force, and a reduced pressure the sheath 20 against the carcass 26. This greatly improves the level of crimping, with improved reliability. The crimping operation is less tedious for the operators, when they perform the tightening with screws. The screws used in the clamping assembly 78 are advantageously of reduced size or are fewer, which can reduce the size of the tip 14 and its diameter. Also, the screws are less stressed, this allowing to use screws of class of reduced quality. In addition, the reduction of the pressure applied by the sheath 20 on the carcass 26 makes it possible to use cannulas 80 of reduced thickness. When a high temperature is used for heating the pressure sheath 20, a single heating operation is necessary to ensure both crimping by the ring 74 and stress relief after crimping. It is therefore possible to use high performance polymers suitable for high temperatures and high pressures to achieve the pressure sheath 20 of a flexible pipe 10, without risk of deterioration of the seal at the tip. 14, and using a tip design 14 identical to that used for standard polymers. The flexible pipe 10 is therefore particularly suitable for transporting fluids at high temperature and at high pressure.
    [0036] In the process variant illustrated in FIG. 4, the end vault 50 is put in place around the end section 32 and the crimping front ring 74, before heating the end section 32. The heater 92 is then disposed in contact with an outer peripheral surface 63 of the skirt 62 to heat the vault 50 and the end portion 32 through the skirt 62, prior to the clamping of the support ring 76 by 35. clamping assembly 78.
    [0037] In another variant, the mandrel 94 is replaced by a supply of hot air circulating in the circulation passage 16. In another variant, a heating pan is arranged externally around the end section 32, in the operating mode. 3, or around the vault 50, in the embodiment of FIG. 4. In yet another variant, the cannula 80 is introduced between the sacrificial sheath 22 and the end section 32 of the pressure sheath 20, after heating of the end section 32. In an alternative embodiment of the flexible pipe 10, illustrated in Figure 5 10 the pipe 10 has no internal carcass 26 and is then designated by the English word " smooth-boron. The pressure sheath 20 is the innermost layer of the structure of the pipe 10 in contact with the fluid flowing in the passage 16. The cannula 80 is then inserted directly into contact with the inner surface of the pressure sheath. 20.
    [0038] The method for producing a seal according to the invention of FIG. 5 differs from that applied to a "rough-bore" flexible pipe in that the heating equipment 90 comprises a heating mandrel 94 introduced into the pressure sheath. 20 to heat the end section 32 at its inner surface and to reduce more quickly the Young's modulus of the material used for the realization of the sheath 20. Thus, the insertion of the cannula 80 is favored. In addition, used in combination with the heating mandrel 94 or alternatively, a heating element 92 such as a heating blanket and / or a heating band wound around the pressure sheath 20 and the ring 74 locally heats the section of the heater. end 32 and reduces more quickly the Young's modulus of the material used for producing the sheath 20. Alternatively, the end section 32 is heated with a supply of hot air applied externally with respect to the pressure sheath . In another variant, a heating pan is arranged externally around the end section 32, in the embodiment of FIG.
    [0039] Advantageously, the end vault 50 is always put in place around the end section 32 and the crimping front ring 74, after heating of the end portion 32. In yet another variant embodiment of the invention 6, the flexible pipe 10 has a structure comprising, from the inside to the outside, an inner carcass 26, a pressure sheath 20, a pressure vault 28, at least 3035171 a layer of pressure. Axial tensile strength armors 24, 25 and an outer sheath 30. In this flexible conduit configuration 10, the use of a cannula 80 is technically not feasible.
    [0040] The step of heating the end section 32 of the pressure sheath 20 made during the sealing of the nozzle process serves for the relaxation of the constraints related to the crimping of the pressure sheath 20, since that the clamp ring 74 of the front crimp assembly 54 has deformed radially inward in said sheath 20. 10
    权利要求:
    Claims (15)
    [0001]
    1. A method of producing a seal in a tip (14) of a flexible pipe (10) comprising a pressure sheath (20) made from a polymer material, the method comprising the following steps: - provision , around an end section (32) of the pressure sheath (20), a crimping ring (74) intended to be introduced into the pressure sheath (20); placing, around the end section (32) and the crimping ring (74), an end vault (50) of the end piece (14), the end vault (50) having a a cooperating surface (64) with the crimping ring (74) capable of pushing the crimping ring (74) radially into the pressure sheath (20); relative displacement of the crimping ring (74) with respect to the engagement surface (64) for crimping the crimping ring (74) in the pressure sheath (20); characterized in that the method comprises, before the relative displacement step, a heating step of the end section (32) of the pressure sheath (20), suitable for reducing the Young's modulus of the polymeric material of the section end portion (32) of the pressure sheath (20) and to maintain a reduced Young's modulus during the relative displacement step.
    [0002]
    2. - Method according to claim 1, in which the Young's modulus of the polymer material of the end section (32) of the pressure sheath (20), during the step of relative displacement, is less than 1000 MPa and is in particular between 50 MPa and 500 MPa.
    [0003]
    3. - Method according to claim 1 or 2, wherein the temperature of the end section (32) of the pressure sheath (20) during the relative displacement step is greater than the ambient temperature.
    [0004]
    4. - Method according to claim 3, wherein the temperature of the end section (32) of the pressure sheath (20) during the relative displacement step is greater than 50 ° C and is in particular between 100 ° C and 200 ° C.
    [0005]
    5. - Method according to any one of the preceding claims, wherein the pressure sheath (20) is made from a polymeric material selected from PVDF, PEK, PEEK, PEEKK, PEKK, PEKEKK, PAI, PEI, PSU, PPSU, PES, PAS, EPP, PPS, LCP, APP and / or their mixtures.
    [0006]
    6. - Method according to any one of the preceding claims, wherein the end section (32) of the pressure sheath (20) is heated from the outside during the heating step. 3035171 17
    [0007]
    The method of claim 6, wherein an outer surface of the end portion (32) of the pressure sheath (20) is heated by direct contact of a heating element (92) with the pressure sheath (20). ) and / or with the crimping ring (74). 5
    [0008]
    The method of claim 6, wherein the step of placing the end vault (50) is performed prior to the heating step, the heating step including heating the end vault (50). ) by direct contact of the end vault (50) with a heating element (92), and heating of an outer surface of the end section (32) of the pressure sheath (20) through the vault end (50). 10
    [0009]
    9. - Method according to any one of claims 7 or 8, wherein the heating element (92) is a heating band and / or a heating blanket.
    [0010]
    10. - Method according to any one of the preceding claims, wherein the end section (32) of the pressure sheath (20) is heated from the inside during the heating step. 15
    [0011]
    11. - The method of claim 10, wherein the end section (32) of the pressure sheath (20) is disposed around an inner carcass (26) defining an internal passage (16) of fluid circulation, the heating step comprising heating by the interior of the inner carcass (26).
    [0012]
    The method of claim 11, wherein the inner carcass (26) is heated by a heating mandrel (94) and / or by hot air circulation in the fluid circulation passage (16).
    [0013]
    13. - Method according to any one of claims 11 or 12, wherein a cannula (80) is interposed between a sacrificial sheath (22) disposed around the inner carcass (26) and the intermediate portion (32) of the sheath. pressure (20), the cannula (80) being heated in the heating step by the inner carcass (26), an inner surface of the end section (32) of the pressure sheath (20) being heated by the cannula (80).
    [0014]
    14. A process according to any one of the preceding claims comprising a step of measuring the temperature of the end section (32) of the pressure sheath (20) during the heating step.
    [0015]
    15. - Method according to any one of the preceding claims, wherein the relative displacement of the crimping ring (74) relative to the end vault (50) is a radial displacement along an axis (X-X ') the flexible pipe (10).
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    同族专利:
    公开号 | 公开日
    FR3035171B1|2017-05-19|
    EP3286474B1|2019-06-12|
    US20180106405A1|2018-04-19|
    EP3286474A1|2018-02-28|
    US10753522B2|2020-08-25|
    BR112017022581A2|2018-07-17|
    DK3286474T3|2019-09-02|
    WO2016169987A1|2016-10-27|
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    法律状态:
    2016-04-29| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-21| PLSC| Publication of the preliminary search report|Effective date: 20161021 |
    2017-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-20| PLFP| Fee payment|Year of fee payment: 4 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-04-28| PLFP| Fee payment|Year of fee payment: 6 |
    2022-01-07| ST| Notification of lapse|Effective date: 20211205 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1553484A|FR3035171B1|2015-04-20|2015-04-20|METHOD OF MAKING SEALING INTO A TIP OF A FLEXIBLE CONDUIT COMPRISING A PRESSURE SLEEVE|FR1553484A| FR3035171B1|2015-04-20|2015-04-20|METHOD OF MAKING SEALING INTO A TIP OF A FLEXIBLE CONDUIT COMPRISING A PRESSURE SLEEVE|
    BR112017022581A| BR112017022581A2|2015-04-20|2016-04-20|A method of forming a seal on a flexible pipe end piece|
    US15/567,396| US10753522B2|2015-04-20|2016-04-20|Method for forming a seal in an end piece of a flexible pipe including a pressure sheath|
    DK16721684.5T| DK3286474T3|2015-04-20|2016-04-20|A method of producing a seal in an end piece of a flexible tube, comprising a pressure tube|
    PCT/EP2016/058766| WO2016169987A1|2015-04-20|2016-04-20|Method for forming a seal in a tip of a flexible hose including a pressure sheath|
    EP16721684.5A| EP3286474B1|2015-04-20|2016-04-20|Method for forming a seal in an end fitting of a flexible conduit including a pressure sheath|
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