• 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 invention relates to a method for producing a flexible pipeline (10) and a line thus produced. The method comprises the following steps: a) providing a tubular structure, b) winding in a helical manner and with long increment around the tubular structure at least a plurality of reinforcing threads to form at least one layer of wood reinforcing threads (22, 24), c) in a helical manner, a maintenance tape (30) is wound on top of the at least one layer of wooden armor threads (24) in order to form a maintenance coating (32). In addition, between steps b) and c), a coating (28) for continuous protection is applied to the at least one layer of wood reinforcement fibers (24) in such a way that the maintenance coating (32) and the at least one layer of wood reinforcement fibers (24) ) isolated against each other.
    公开号:DK201670487A1
    申请号:DKP201670487
    申请日:2016-07-04
    公开日:2016-09-19
    发明作者:Frédéric Demanze
    申请人:Technip France；
    IPC主号:
    专利说明:

    Flexible tubular wire with resistant coating
    The invention relates to a flexible tubular conduit intended for hydrocarbons and to a method for producing such a conduit.
    One intended area of application is, in particular, but not exclusively, the transport of hydrocarbons or the injection of water into a marine environment between a seabed and a projecting surface. So-called '' unconnected 'flexible tubular wires described in the normative writings API 17J' 'Specification for Unbonded Flexible Pipe' and API RP 17B, '' Recommended Practice for Flexible Pipe '' published by the "American Petroleum Institute", have several metallic and plastic superimposed layers which give them mechanical and leakage properties to the hydrocarbon they transport and the surrounding environment.
    In general, they also have, from the inside out, a metallic carcass made of a helically bonded band, a polymer sheath pressurized, a helical coiled coil of a metal wire forming a pressurized vault, at least a wood casing layer wound with long rise around the pressure arch, and an external protective sheath. When the cables are intended to be installed on deep sea, during their manufacture, in a helical manner, with a short pitch, a maintenance band is wound on top of the outermost layer of wooden armor. These maintenance bands or reinforcement bands contain the last layer of the reinforcing wires of the reinforcing wires. When the wires are subjected to hydrostatic compressive forces and especially to deep water, and the internal pressure of the conduit drops too quickly, more accurately under the hydrostatic pressure, they are actually subject to the reverse bottom effect. Thus, the cord is subjected to axial compression forces which tend to shorten it. When added to the wire in a dynamic and turbulent environment, lateral loads of the wire are added, the reinforcing wires in the wood reinforcing layer tend to burn up and break down the wire locally in an irreversible way. The reinforcing threads then locally form the so-called '' bird cage '' structure.
    Thus, the maintenance tape layer is intended to avoid this irreversible inflating of the wooden armor strands. At very great depths, the maintenance belts are sandwiched between the outer protective sheath on which the hydrostatic pressure acts and the wooden armor wire layer which is prone to inflating. Thus, they are subject not only to compressive forces from the surface, but also to an acidic environment due to gases such as CO2 and H2S and also elevated temperatures. Under these conditions, the degradation of the maintenance layer is accelerated and, at the same time, the flexible wire is subjected to movement, it is degraded due to friction between the external protective sheath and the wooden casing wires.
    It has also been envisaged to coat the maintenance tape with a polymeric material subsequently on the wood reinforcement layer. Thus, the polymeric material is firmly connected to the maintenance belt and is formed only therewith. Reference is made to WO 2008/135 663, which describes such a maintenance belt. However, the band thus clad is not protected against degradation in all exploitation situations.
    A problem that arises and which the present invention seeks to lock is to provide a method that allows better protection of the maintenance belt when the cord is used in harsh conditions.
    According to this object, the present invention proposes a method for producing a flexible tubular conduit intended for the transport of hydrocarbons, which is of the type comprising the following steps: a) providing a dense tubular structure having an outer surface and an inner surface defining a flow zone; b) wrapping around said tubular structure in a helical manner with a large pitch at least a plurality of reinforcing wires to form at least one layer of wooden reinforcing wires abutting against the outer surface of said tubular structure; and c) a maintenance ribbon is wound in a helical manner with a short pitch on the at least one layer of wood reinforcement threads to form a maintenance coating adapted to radially retain said reinforcement threads. Between step (b) and step (c), inter alia, a coating for continuous protection is applied to the at least one layer of wood-reinforcing threads in such a way that they, at least one layer of wood-reinforcing threads, are insulated against each other, and after step c) applying, inter alia, another coating for continuous protection to the maintenance coating.
    The characteristic feature of the invention thus rests in part on the provision of a coating for continuous protection, which is wound around the at least one layer of wooden reinforcing threads preferably around the outermost layer and directly arranged against it in such a way that the maintenance strip can be wound later. on the protective coating, and secondly, providing additional coating for continuous protection on the maintenance layer. In this way, the maintenance coating and the layer of wood reinforcement wires are insulated against each other, and as a result, the maintenance coating is protected against friction and wear against the reinforcing wires in the layer of wood reinforcement wires. In addition, the protective coating provides a thermal shielding against the heat released by hydrocarbon flowing inside the conduit, and as a result, the maintenance band sees its temperature attenuated relative to a situation where the conduit is completely without the coating for continuous protection. It also provides a barrier coating against acid gases transported by the hydrocarbon, and as a result, it reduces the risk of damage to the maintenance coating and minimizes the pH acid in the surrounding environment.
    The maintenance coating is sandwiched coaxially between the two protective layers, one for protecting the interior against reinforcing wires in the wood reinforcement layer, the elevated temperatures and the acid gases, and the other protecting it externally from the external sealing sheath. In this way, the two protective coatings protect the maintenance coating against relative movements of the layer of wood reinforcing threads and the outer tightness sheath, and as a result of wear phenomena.
    The protective coating is coherent and separate from the maintenance coating as opposed to the prior art maintenance strips made in two parts prior to their application. Thus, the protective coating completely plays its protective role against the reinforcing wires in the wooden reinforcing layer. According to a particularly advantageous embodiment of the invention, with a short pitch on top of the at least one layer of wood reinforcing yarns, a band of polymeric material is wound to form overlapping windings for the application of the coating for continuous protection.
    By means of a system equipped with a winding machine, which is usually used for the manufacture of flexible tubular conduits, a band of polymer material is monitored to monitor the windings to overlap in such a way that the entire surface determined by the layer of wood casing wires , is covered. The continuous protection coating thus protects the maintenance coating against all contact with the layer of wood reinforcement threads. It will be seen that the strip of polymeric material is applied at a very low voltage and by no means comparable to the voltage applied to the maintenance band. Thus, all the qualities of the polymeric material tape, which are intended to form the protective coating, are preserved, and in contrast to the maintenance tape of the prior art.
    According to another embodiment of the invention, a sheath of polymeric material is extruded coaxially onto the at least one layer of wood-reinforcing yarns to provide continuous protection to the coating. The coherence of the protective layer is thus maximum in all directions. The mandrel extrusion heads for forming the sheaths are commonly used to produce the flexible tubular conduits. Preferably, the polymeric material is polyamide or also polypropylene.
    Advantageously, with a short pitch, a band of polymeric material is wound onto the maintenance coating to form the overlapping windings upon the application of said second coating for continuous protection. When the first protective coating disposed between the maintenance coating and the layer of wood reinforcing yarns is made by means of a strip of polymeric material, it is easier to provide a second band for the maintenance coating due to the same winding machine.
    In some applications, regardless of the manner in which the first protective coating is produced, in any case advantageously, a sheath of a polymeric material is extruded onto said maintenance coating to apply the second continuous coating.
    According to a particularly advantageous embodiment, an external leakage sheath is also formed around the maintenance layer. Thanks to this external leakage sheath, the reinforcements are protected against the marine environment's water, enabling the corrosion process to be delayed.
    According to a further object, the present invention relates to a flexible tubular conduit intended for the transport of hydrocarbons, which flexible tubular conduit comprises: a dense tubular structure having an outer surface and an inner surface defining a flow zone, at least one layer of wooden reinforcement threads abutting against the outer surface of the tubular structure, the at least one layer of wooden reinforcing threads being formed by winding at least a plurality of long-pitch reinforcing threads around the tubular structure, and a maintenance layer formed by winding in helical fashion with a short rise of a maintenance band around the at least one layer of wooden reinforcing threads to radially retain the reinforcing threads. In addition, the conduit comprises, on the one hand, a continuous protection coating disposed between the maintenance band and the at least one layer of wood reinforcing wires in such a way that the maintenance band is insulated against the at least one layer of wood reinforcing wires, and another protection on the maintenance layer.
    These protective layers provide all of the above advantages. Preferably, according to one embodiment variant, the continuous protection coating is formed on the at least one layer of wood reinforcing yarns of overlapping turns of a polymer material band. According to one embodiment, said continuous protection coating is formed on the at least one layer of wood reinforcing yarns by coaxial extrusion of a sheath of a polymeric material.
    In addition, the second continuous protection coating is preferably formed on the maintenance coating by coaxial extrusion from a sheath of a polymeric material.
    Other features and advantages of the invention will become apparent from the following description of particular embodiments of the invention which are not limiting with reference to the accompanying drawings, in which: Figure 1 is a perspective schematic sectional view showing a flexible tubular conduit according to the invention in Figure 2 is a perspective schematic cut-away view showing a flexible tubular conduit according to the invention in accordance with a second embodiment.
    The object of the invention is, according to a first aspect, a method for producing a flexible tubular conduit intended for the transport of hydrocarbons in a marine environment. Reference is first made to Figure 1, which shows partially cut out a flexible tubular conduit 10 to describe successive steps in the manufacture of the conduit. This figure shows various superposed layers forming the conduit, and these are sequentially formed one on top of the other from the inner 12 of the conduit to its outer 14. The inner 12 forms an internal flow space for the hydrocarbon.
    According to the invention, first, a pressure sheath 16 is made of a polymeric material by hot extrusion and delimited by an inner surface 17. The polymeric material used is advantageously a semi-crystalline thermoplastic material. The pressure sheath 16 is dense and sufficiently severe to withstand a flow of hot hydrocarbon.
    Thereafter, the pressure sheath 16 is covered by a pressure vault 18 made of a metal wire having a substantially rectangular cross-section, which is wound in a helical manner with a short rise to form collision windings 20. The windings 20 are placed radially on the outer surface of the pressure sheath 16. The pressure vault 18 allows for the capture of the external forces exerted radially by the hydrostatic pressure on the flexible tubular conduit in the marine environment, as well as the radial internal forces exerted by the circulation of hydrocarbon fluids in the direction of the internal flow space. In this way, the pressure sheath 16 is protected.
    The pressure vault 18 determines an outer surface 21, which is subsequently covered by two layers 22, 24 of a plurality of high pitch coils and in two opposite directions on one another. These layers 22, 24 reinforcements are so-called tensile reinforcements as they allow the absorption of tensile forces exerted on the wire both during on-site installation and during utilization. The outermost layer of reinforcing threads determines a cylindrical abutment surface 25.
    According to a first embodiment, with a short pitch, a first band 26 of polymeric material is wound around the outermost layer 24 of reinforcing wires to place it against the cylindrical abutment surface 25. The polymeric material used is preferably resistant to hydrolysis phenomena. It is selected e.g. among the polyolefin family or polymers of vinylidene fluoride or also the family of polyamides. The first band 26 made of one of these materials is wound in a helical manner with a short pitch by means of a winding machine against the layer 24 of reinforcing threads in such a way that the edges of the windings overlap. In this way, a first continuous coating 28 is obtained which integrally covers the cylindrical abutment surface 25 determined by the reinforcing wire layer 24. The first band 26 is applied in a biased manner in such a way that the first protective layer 28 is relatively coherent. Its width is e.g. between 20 mm and 120 mm, e.g. 75 mm, while its thickness e.g. is between 0.5 mm and 5 mm.
    An alternative to this first embodiment comprises the simultaneous winding with a short rise of two first bands 26 by the winding machine in such a way that the edges of their turns overlap each other.
    Thus, the first protective coating 28 determines a cylindrical coherent outer surface upon which, in a helical manner, with a short pitch, a reinforcing or maintenance band 30. The maintenance band 30 is wound with a strong tension around the first protective coating 28 during the formation of preferably impinging windings. way of obtaining a maintenance coating 32. It is e.g. made from fibrous elements of aramid. Its width is e.g. between 20 mm and 60 mm, and its thickness is between 1 mm and 5 mm. Then, on the maintenance layer 32, a second band 34 made of the same polymeric material as the first band 26 is wound with a short rise and in the same manner that a second protective coating 36 is formed.
    According to one embodiment, the second band 34 is made of a polymeric material other than that used to produce the first band 26. It is selected depending on the material of the first band 26 and the temperature produced by the hydrocarbon circulating in the internal flow room.
    Then, an external sealing sheath 38 is extruded from a thermoplastic polymeric material onto the second protective layer 36 by means of an annular extruder head. Thus, the maintenance coating 32 is sandwiched between the outermost layer 24 of the reinforcing wires and the external sealing sheath 38, but it is protected on the inner side and the outer side, respectively, of the first protective layer 28 and the second protective layer 36. When the layer 24 of reinforcing wires tends to being inflated under the dual effect of differential pressure between the outside and inside sides of the conduit and the movements of the conduit, and, conversely, the external density sheath 38 is exposed to mid-point radial forces due to the hydrostatic pressure. In this way, the maintenance belt 30 is protected against abrasion and wear due to the relative movement between the layer of wood reinforcement threads and the external sealing sheath 38. These relative movements are transmitted locally by surface parts extending in the tangent planes of the surface parts.
    In addition, the first protective coating 28 provides a thermal shielding for the maintenance coating 32 against the thermal energy released by the hydrocarbon circulating in the internal flow space and which moves radially by conduction in the thickness of the conduit 10. It also provides a barrier coating against acid gases transported by the hydrocarbon, and as a result, it limits the risk of damage to the maintenance layer and minimizes the pH of the surrounding acidic environment. In this way, the aging of the maintenance layer 32 is retarded, and as a result, the utilization duration of the conduit 10 is increased.
    It will be noted that the use of the first first protective coating 28 already allows protection of the maintenance layer 32, as well as the wear of the layer of reinforcing wires 24, as well as the heat and the acid gases.
    It is also contemplated to produce a flexible tubular conduit having the only first protective coating 28 when the utilization conditions are substantially less severe.
    According to another embodiment of the invention, it is preferred to first provide a metal carcase 8 made of a helical bonded band, after which the pressure sheath 16 is subsequently extruded.
    Reference is now made to Figure 2, which shows a flexible tubular conduit 10 'made in accordance with the invention and in accordance with another embodiment. The elements which exhibit the same function here bear the same reference numerals bearing a mark: ......
    The flexible tubular conduit 10 'similarly and according to an identical arrangement presents a pressure sheath 16', a pressure vault 18 and two layers 22 ', 24' each of a plurality of reinforcing threads.
    Thus, the outer layer 24 'of reinforcing yarns is covered by a coating 28' for continuous protection, which is obtained by extrusion of a polymeric material. For this to be possible, the tubular element comprising the impression sheath 16 ', the pressure vault 18' and the two reinforcing layers 22 ', 24' is passed through an annular extrusion head which permits the formation and application of the cylindrical first coating 28 'to continuous protection precisely on the outer layer 24 'of reinforcing wires. Such a protective coating 28 'is, by construction, completely continuous and dense throughout its length. It may also provide additional protection which allows at least partial protection of the fibers of the reinforcing layers 22 ', 24' from the marine environment water which could penetrate externally. This protective layer 28 'also allows for the retention of the hydrocarbon gases which penetrate through the thickness of the pressure spoon 16'.
    Advantageously, the polymeric material selected for the preparation of the first protective coating 28 'is among those materials which have a high thermal insulation coefficient. These include propylene, polyethylene, vinylidene polyfluorides and also polyamides and thermoelastic elastomers. In this way, the first protective coating 28 'constitutes a thermal shield against the heat supplied by the hydrocarbon circulating in the interior of the conduit 10' and more precisely the inner impression sheath 16 '.
    Subsequently, a maintenance belt 30 ', in the same manner as in the previous embodiment, is wound with a strong tension around the first protective coating 28' to form windings, preferably abutting, in such a way that a maintenance coating 32 'is obtained. It may also be made from fibrous aramid elements. The width is e.g. between 20 mm and 60 mm, and the thickness is between 1 mm and 5 mm.
    Then, the assembly is again passed across the annular extrusion head to apply the maintenance coating 32 'to the second coating 36' for continuous protection and polymeric material. The material used is e.g. identical to that used for the first protective coating 28 '. Preferably, the polymer material is selected from chemically stable polymers such as polypropylene, polyethylene or thermoplastic elastomers. The use of polyamides is also possible.
    Finally, the external density sheath 38 'is extruded coaxially on top of the second protective coating 36'.
    According to these embodiments, the risk of creeping of the maintenance strips 30 'across slots in the wood reinforcement layers 24' is very small. The risk of the maintenance bands' contact with the hydrocarbon gas is also about zero.
    As in the previous embodiment, the maintenance coating 32 'is protected on the inner and outer sides of the first protective coating 28' and the second protective coating 36 ', respectively. When the layer of reinforcing wires 24 'is inflated under the dual effect of differential pressure and the movement of the conduit and subjected to the radial center-point seeking forces of the external density sheath 38' due to the hydrostatic pressure, the maintenance belt 30 'is protected against wear and wear due to relative movement of the made of wood reinforcement threads and the external density sheath 38 '. In another embodiment of the invention, a metal body 8 'made of a helically bonded band is preferably first provided, after which the pressure sheath 16 is subsequently extruded.
    According to a further object, the present invention also relates to a flexible tubular conduit 10, 10 'made in accordance with one of the above described embodiments of the method.
    权利要求:
    Claims (10)
    [1]
    A method of producing a flexible tubular conduit intended for the transport of hydrocarbons, which is of the type comprising the following steps: - a) providing a dense tubular structure having an outer surface (21) and a inner surface (17) defining a flow zone; - b) surrounding said tubular structure with a large pitch helically wound at least a plurality of reinforcing wires to form at least one layer of wooden reinforcing wires (22, 24) abutting - the outer surface of said tubular structure; - c) a maintenance band (30) is wound in a helical manner with a short pitch on the at least one layer of wood casing threads (24) to form a maintenance coating (32) adapted for radial retention of said reinforcing threads, characterized in that between the step b) and the step c), among other things, on the at least one layer of wooden arm annealing yarns (24) apply a coating (28) for continuous protection in such a way that they, the maintenance coating (32) and at least one layer of wood embroidery yarns (24), are insulated against one another and after step c) inter alia, apply a second coating (36) for continuous protection to the maintenance coating (32).
    [2]
    A method according to claim 1, characterized in that a strip (26 ') of polymeric material is wound on the at least one layer (24) of wood reinforcing yarns to form overlapping windings in order to apply said coating (26). 28) for continuous protection.
    [3]
    Method according to claim 1, characterized in that a sheath of polymeric material is extruded onto the layer of wood reinforcing yarns in order to apply the layer (28 ') for continuous protection.
    [4]
    Method according to one of claims 1 to 3, characterized in that a strip (34) of polymeric material is wound on the maintenance layer (32) with a short rise to form overlapping windings in order to apply the second coating (36) to continuous protection.
    [5]
    Method according to one of claims 1 to 3, characterized in that a sheath of a polymeric material is extruded coaxially on the maintenance coating (32) in order to apply the second coating (36) for continuous protection.
    [6]
    Process according to one of claims 1 to 5, characterized in that an external sealing sheath (38) is formed around the maintenance coating (32).
    [7]
    A flexible tubular conduit (10) for the transport of hydrocarbons, comprising flexible tubular conduit: - a dense tubular structure having an outer surface (21) and an inner surface (27) defining a flow zone, at least one layer of wood casing (22, 24) abutting the outer surface (21) of said tubular structure, said at least one layer of wood casing (22, 24) being formed by winding at least a plurality of a long pitch reinforcement wire around the tubular structure, - a maintenance layer (32) formed by winding in helical fashion with a short pitch of a maintenance belt (30) around the at least one layer of wood reinforcement wire (24) for radially retaining the reinforcing wires, characterized in that it further comprises, in part, a coating for continuous protection (28) arranged between the maintenance belt (32) and at least one one layer of wood reinforcement threads (24) in such a way that the maintenance strip (32) is insulated against the at least one layer of wood reinforcement threads (24), and another layer for continuous protection (36 ') on the maintenance layer (32') .
    [8]
    Flexible tubular conduit according to claim 7, characterized in that the coating (28) for continuous protection is formed on the layer (24) of wooden reinforcing threads of a strip (26) of polymer material with overlapping windings.
    [9]
    Flexible tubular conduit according to claim 7, characterized in that the coating (28 ') for continuous protection is formed on the layer (24') of wood reinforcing threads by coaxial extrusion of a sheath of polymer material.
    [10]
    Flexible tubular conduit according to one or more of claims 7 to 9, characterized in that the second coating (36 ') for continuous protection is formed on the maintenance coating (32') by coaxial extrusion of a sheath of polymeric material.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3014533A1|2015-06-12|
    DK179535B1|2019-02-08|
    GB2535923A|2016-08-31|
    BR112016012387B1|2021-04-06|
    GB2535923B|2020-06-24|
    GB201609629D0|2016-07-20|
    WO2015082865A1|2015-06-11|
    FR3014533B1|2016-04-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5645109A|1990-06-29|1997-07-08|Coflexip|Flexible tubular pipe comprising an interlocked armoring web and process for producing it|
    HU225934B1|2004-04-07|2008-01-28|Phoenix Rubber Gumiipari Kft|High pressure hose reinforced by multi-ply inserts|
    AU2005261762B2|2004-07-08|2010-08-12|National Oilwell Varco Denmark I/S|A flexible pipe, its manufacture and use|
    MX2009009837A|2007-03-21|2009-09-24|Technip France|Flexible duct for conveying hydrocarbons and having a reinforced maintain layer.|
    US20130014849A1|2010-03-31|2013-01-17|National Oilwell Varco Denmark I/S|Flexible unbonded pipe and an offshore system|
    HU229978B1|2011-10-18|2015-03-30|Contitech Rubber Industrial Gumiipari Kft.|Rubber hose for high pressure gassy medium|EP3482112A4|2016-07-06|2019-12-04|National Oilwell Varco Denmark I/S|A flexible armoured pipe with a retaining layer of metal elongate strip|
    法律状态:
    2019-02-08| PME| Patent granted|Effective date: 20190208 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362242|2013-12-06|
    FR1362242A|FR3014533B1|2013-12-06|2013-12-06|FLEXIBLE TUBULAR DRIVE WITH RESISTANT HOLDING LAYER|
    PCT/FR2014/053210|WO2015082865A1|2013-12-06|2014-12-08|Flexible tubular pipe with resistant retaining layer|
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