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WO2011083819A1 - Structure de prévention de la corrosion pour tuyau souple - Google Patents

Structure de prévention de la corrosion pour tuyau souple Download PDF

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Publication number
WO2011083819A1
WO2011083819A1 PCT/JP2011/050107 JP2011050107W WO2011083819A1 WO 2011083819 A1 WO2011083819 A1 WO 2011083819A1 JP 2011050107 W JP2011050107 W JP 2011050107W WO 2011083819 A1 WO2011083819 A1 WO 2011083819A1
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WIPO (PCT)
Prior art keywords
flexible pipe
reinforcing layer
reinforcing
pipe
prevention structure
Prior art date
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Ceased
Application number
PCT/JP2011/050107
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English (en)
Japanese (ja)
Inventor
裕章 羽上田
木村　秀雄
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Nippon Steel Engineering Co Ltd
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Nippon Steel Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Engineering Co Ltd filed Critical Nippon Steel Engineering Co Ltd
Publication of WO2011083819A1 publication Critical patent/WO2011083819A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F16L11/083—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire three or more layers

Definitions

  • the present invention relates to a structure for preventing corrosion of a flexible pipe for discharging corrosive gas in a reinforcing layer between an inner tube and an outer sheath from the distal side toward the proximal side in the pipe axial direction.
  • Flexible pipe is used as a riser pipe that is used from the offshore platform to the wellhead of the seabed in the work of extracting oil and natural gas from the seabed oil field.
  • flexible pipes that can support oil field development in waters exceeding 2000 m are available. It has come to be required.
  • Such a flexible pipe has a general structure in which an interlock pipe, an inner pipe, an internal pressure reinforcing strip, an axial force reinforcing strip, and an outer sheath are arranged in this order from the inside.
  • the oil to be collected contains corrosive gases such as carbon dioxide (CO 2 ) and hydrogen sulfide (H 2 S), and the crude oil to be collected from a deep sea area also contains these corrosive gases.
  • the innermost interlock pipe of the flexible pipe has a caulking structure and has a certain buckling strength, but is not liquid-tight, and leakage of oil in the pipe is prevented by the inner pipe having liquid-tightness.
  • the inner pipe is made of a resin material, it is generally known that the corrosive gas contained in the oil cannot be completely blocked and the corrosive gas permeates with a certain value of transmittance.
  • the corrosive gas that has permeated the inner tube stays in the space between the outer sheath and the inner tube, that is, in the reinforcing layer.
  • the corrosive gas in the reinforcing layer flows to the pipe end side through a gap provided between the reinforcing strips of the internal pressure reinforcing strip or the axial force reinforcing strip and is discharged to the atmosphere.
  • the resistance of the corrosive gas to flow through the gap provided between the reinforcing strips increases, and it becomes difficult to discharge the corrosive gas accumulated on the seabed side.
  • the discharge mechanism receives a larger pressure than the sea (for example, a pressure of 30 MPa at a depth of 3000 m)
  • the retained corrosive gas does not flow to the sea surface unless a gas pressure exceeding this pressure is applied.
  • the corrosive gas accumulates on the seabed side and accumulates. Since steel is used for both the internal pressure reinforcing strip and the axial force reinforcing strip, as described above, if corrosive gas accumulates in the reinforcing layer of the flexible pipe, these reinforcing strips are exposed to the corrosive environment and deteriorated. Progresses, and the malfunction that the lifetime of a flexible pipe falls arises.
  • Patent Document 1 A gas removing method for releasing the gas in the reinforcing layer from the other end to the outside of the pipe is disclosed in Patent Document 1.
  • the conventional flexible pipe has the following problems. That is, in Patent Document 1, for example, when applying at a deep water depth of 3000 m, in order to discharge the corrosive gas from the seabed-side discharge mechanism, the carrier gas is sent to the reinforcing layer near the seabed where corrosive gas tends to accumulate. Since it is necessary to send the carrier gas at a pressure exceeding 30 MPa, it is assumed that the outer sheath swells and bursts at that pressure.
  • the present invention has been made in view of the above-described problems. It is possible to reliably replace the corrosive gas in the reinforcing layer with fresh air even under a large depth of water.
  • An object of the present invention is to provide a flexible pipe corrosion prevention structure that can prevent corrosion and increase strength.
  • a corrosion prevention structure for a flexible pipe comprises a liquid-tight inner tube, an outer sheath, and a plurality of spirally twisted strip members.
  • a reinforcing strip disposed in a reinforcing layer between an inner tube and the outer sheath, and discharges corrosive gas in the reinforcing layer from the distal side to the proximal side of the flexible pipe in the pipe axial direction.
  • the reinforcing layer is provided with a small-diameter tube continuously extending along the pipe axial direction.
  • a space connecting the proximal side to the proximal side of the reinforcing layer can be secured in the range where the small diameter tube is disposed, so suction means such as a vacuum pump is provided at the proximal end of the small diameter tube.
  • the position of the end of the small-diameter tube, that is, the corrosive gas sucking position is specified, so that the gas concentration accumulated in the reinforcing layer at the sucking position can be accurately grasped.
  • the small-diameter tube may be disposed in a spiral gap provided between the reinforcing strip members.
  • the space which connects the base end side from the terminal end side of a reinforcement layer is securable by incorporating a small diameter tube along the clearance gap between the strip members of a reinforcement strip.
  • a plurality of small-diameter tubes may be arranged at predetermined intervals in the circumferential direction of the reinforcing strip.
  • the corrosion prevention structure of the flexible pipe which concerns on the 1st aspect of this invention, you may make it each terminal position of several small diameter tubes differ in a pipe axial direction.
  • the corrosive gas can be discharged for each end position of each small diameter tube. Therefore, by measuring the amount of corrosive gas discharged from each small diameter tube, the flexible pipe The gas concentration at a plurality of positions can be accurately confirmed in the axial direction.
  • a suction port that communicates with the gap and is open to the atmosphere may be provided on the proximal end side of the reinforcing layer.
  • fresh air can surely flow into the reinforcing layer from the suction port opened to the atmosphere on the base end side of the reinforcing layer.
  • one or several small diameter tubes may be used for suction, and the proximal end side may be opened to the atmosphere. In this case, even when the gap provided between the reinforcing strips is clogged somewhere, fresh air can surely flow into the end side.
  • the corrosion prevention structure of the flexible pipe of the present invention corrosive gas that permeates the inner pipe and stays in the reinforcing layer is released to the atmosphere or a recovery tank, etc. Since the corrosive gas can be surely replaced with fresh air and the corrosive gas concentration in the reinforcing layer can be reduced, the corrosive environment in the reinforcing layer is improved, and the reinforcing strip in the reinforcing layer is improved. Corrosion of can be prevented. In addition, the corrosive gas in the reinforcing layer can be surely removed, and the occurrence of hydrogen embrittlement can be effectively prevented, making it possible to use a high-strength reinforcing strip and the long distance of the flexible pipe. It is possible to improve the applicability in use over a wide area or in deep water.
  • the corrosion prevention structure for a flexible pipe according to the first embodiment of the present invention is applied to a flexible pipe 1 that is used to extract oil and natural gas by connecting a recovery vessel 2 on the sea and the sea floor.
  • a flexible pipe 1 that is used to extract oil and natural gas by connecting a recovery vessel 2 on the sea and the sea floor.
  • the flexible pipe 1 will be described below with the recovery ship 2 side as the base end side and the seabed side as the end in the length direction.
  • the flexible pipe 1 includes an interlock pipe 10, an inner pipe 11, an internal pressure reinforcing strip 12 made of a C-shaped strip having a C-shaped cross section, and a pair of flat strips.
  • Axial force reinforcing strips 13 and 14 (inner and outer peripheral sides) and an outer sheath 15 for preventing seawater intrusion are arranged in a multi-layer structure arranged in the order from the inner side to the outer side in the radial direction. .
  • a resin sheet 16 is provided on the inner peripheral side and the outer peripheral side of the inner axial force reinforcing strip 13 and the outer axial force reinforcing strip 14 to reduce wear of the axial force reinforcing strips 13 and 14.
  • the inner tube 11 and the outer sheath 15 are made of plastic, and the inner pressure reinforcing strip 12 and the axial force reinforcing strips 13 and 14 are made of a metal steel material.
  • the inner pressure reinforcing strip 12 reinforces the pressure inside the pipe, and the inner axial force reinforcing strip 13 and the outer axial force reinforcing strip 14 reinforce the axial force of the pipe.
  • a space in which the internal pressure reinforcing strip 12, the inner axial force reinforcing strip 13, and the outer axial force reinforcing strip 14 are disposed between the inner tube 11 and the outer sheath 15 is referred to as a reinforcing layer T.
  • the inner axial force reinforcing strip 13 is composed of a plurality of strip members 13 ⁇ / b> A arranged in a spiral shape along the longitudinal direction (axial direction).
  • a gap 13a is provided between the strip members 13A and 13A adjacent in the circumferential direction.
  • the outer axial force reinforcing strip 14 is twisted and arranged in a spiral direction opposite to the spiral direction of the inner axial force reinforcing strip 13 along the longitudinal direction (axial direction). It consists of a plurality of strip members 14A.
  • a gap 14a is provided between the strip members 14A and 14A adjacent to each other in the circumferential direction, and an enlarged gap 14b in which the gap between the strip members 14A and 14A is larger than the gap 14a at three predetermined positions (the present invention).
  • the enlarged gaps 14b are provided at three locations at a constant interval (that is, a pitch of 120 degrees) in the circumferential direction.
  • each enlarged gap 14b continuous in the axial direction of the flexible pipe 1 is provided with a small-diameter tube 17 made of metal such as stainless steel over almost the entire length of the flexible pipe 1.
  • the three small-diameter tubes 17A, 17B, and 17C have a base end portion 17a that is an open end and is connected to a recovery tank 4 that will be described later, and a terminal end 17b that is a predetermined position P1 near the pipe terminal end 1b. Is located.
  • the upper end portion of the small-diameter tube 17 is connected to a recovery tank 4 that is provided on the recovery vessel 2 (FIG. 1) at sea and connected to suction means (not shown) such as a vacuum pump.
  • suction means such as a vacuum pump.
  • the base end portion 17a of the small-diameter tube 17 can be inserted into the upper end portion 1a of the flexible pipe 1, and each of the inner pressure reinforcing strip 12, the inner axial force reinforcing strip 13, and the outer axial force reinforcing strip 14 is provided.
  • the end structure 3 having a plurality of air pipes 5 connected to the gap formed in the space 3a through the space 3a is fixed.
  • the air pipe 5 has an opening 5a (suction port) that is open to the atmosphere at one end, and the other end 5b is connected to a space 3a that communicates with the gaps between the reinforcing strips 12, 13, and 14.
  • the small-diameter tube 17 is assembled by incorporating the small-diameter tube along the gap (enlarged gap 14 b) between the strip members 14 ⁇ / b> A and 14 ⁇ / b> A of the outer axial force reinforcing strip 14.
  • a space connecting the base end side to the base end side of the reinforcing layer T can be ensured in the range where is disposed.
  • the corrosive gas G accumulated in the reinforcing layer T is moved from the distal end of the small diameter tube 17 toward the proximal end side by connecting the collection tank 4 to the proximal end portion 17a of the small diameter tube 17 and performing vacuum suction. Can be forcibly discharged.
  • the internal pressure reinforcing strip 12 and the axial force reinforcing strip 13 are opened by opening the proximal end side of the reinforcing layer T to the atmosphere.
  • the fresh air E flows into the reinforcing layer T through the gaps provided in. Therefore, it is possible to perform ventilation by replacing the corrosive gas G with fresh air E. Therefore, the corrosive gas concentration in the reinforcing layer T is reduced, and the internal pressure reinforcing strips 12 and the axial force reinforcing strips 13 and 14 made of steel are not exposed to a corrosive environment. Corrosion can be suppressed, and the durability of the flexible pipe can be improved.
  • the air containing the corrosive gas G of high partial pressure can be directly sucked out. Is possible.
  • air containing a large amount of corrosive gas on the end side is sucked up to the base end through the small-diameter tube, it can be discharged separately from the middle and upper reinforcing strips during the discharge process. Damage to the reinforcing strip due to gas stagnation can be avoided.
  • the suction method since the suction method is used, the pressure in the reinforcing layer T is not increased, and the external sheath 15 is not subjected to a pressure load, so that a problem such as breakage of the flexible pipe 1 can be prevented. This eliminates the need for a design associated with the shift to cost and can reduce costs. Further, by providing the small-diameter tube 17, the position of the end of the small-diameter tube 17, that is, the sucking position of the corrosive gas G is specified. Therefore, the gas concentration accumulated in the reinforcing layer T at the sucking position P1 (FIG. 5). Can be grasped accurately.
  • a plurality (three) of small-diameter tubes 17 (17A, 17B, 17C) are arranged at predetermined intervals in the circumferential direction of the outer axial force reinforcing strip 14, when the reinforcing layer T is ventilated, the plurality of small-diameter tubes 17 (17A, 17B, 17C) are arranged.
  • the tubes 17A, 17B, and 17C By simultaneously sucking out using the tubes 17A, 17B, and 17C, a larger amount of air in the reinforcing layer T containing corrosive gas can be sucked, and the ventilation time can be shortened. Can be achieved.
  • the corrosive gas G that permeates the inner pipe 11 and stays in the reinforcing layer T is discharged to the recovery tank 4, so
  • the corrosive gas G in the reinforcing layer T can be surely replaced with fresh air E, and the corrosive gas concentration in the reinforcing layer T can be reduced.
  • the corrosive environment in the reinforcing layer T is improved, and corrosion of the internal pressure reinforcing strips 12 and the axial force reinforcing strips 13 and 14 in the reinforcing layer T can be prevented.
  • the corrosive gas G in the reinforcing layer T can be surely removed, and hydrogen brittle fracture can be effectively prevented, so that a high strength reinforcing strip can be used.
  • the applicability in use over a long distance, or applicability under deep water can be improved.
  • the time required to ventilate the gap in the reinforcing layer was calculated, and the feasibility of discharging corrosive gas and the ventilation effect were confirmed.
  • the time required to ventilate the air volume in the reinforcing layer is calculated based on the following conditions using the Darcy-Weissbach formula, which is a known pressure loss calculation formula shown in Formula (1). did.
  • the flexible pipe was calculated for the case where three small-diameter tubes were arranged in the circumferential direction at regular intervals in the outer axial force reinforcing strip as in the first embodiment described above, and in the case of one and two flexible pipes.
  • h f (L / d) (v 2 / 2g)
  • the small-diameter tube has an inner diameter d of 3 mm and a length L arranged along the spiral of the axial force reinforcing strip, so that the length of the flexible pipe of 3000 m (loss head h) is 6000 m, and the roughness f is 0.015.
  • the capacity of the vacuum pump was 95% in terms of ultimate vacuum.
  • the physical properties of air are 1.165 kgf / m 3 at a density of 30 ° C. and 1 atm, and a viscosity coefficient of 0.0182 ⁇ 10 ⁇ 3 Pa ⁇ s at 25 ° C.
  • the thickness of the reinforcing layer is 16 mm
  • the porosity in the reinforcing layer is 3%
  • the outer diameter of the inner tube is 166.4 mm
  • the amount of air in the reinforcing layer at 30 ° C. and 1 atm was 1.644 m 3 .
  • the average flow velocity v in the small diameter tube is 0.245 m / s
  • the gravitational acceleration g is 9.8 m / s 2 . It should be noted that the pressure in the reinforcing layer at the end of the seabed is equal to the atmospheric pressure.
  • the ventilation time is 264 hours when one small-diameter tube is used, 132 hours when two tubes are used, and 88 hours when three tubes are used. It became.
  • three small diameter tubes it is possible to perform ventilation work for 3 to 4 days continuously and replace the corrosive gas accumulated in the reinforcing layer with clean air. I can confirm. Further, if the number of small-diameter tubes is increased within a range that does not reduce the reinforcing performance of the reinforcing strip, the ventilation work time can be further shortened.
  • the corrosion prevention structure for the flexible pipe 1 ⁇ / b> A has a small-diameter tube 17 in the inner axial force reinforcement strip 13 in addition to the outer axial force reinforcement strip 14 of the first embodiment described above.
  • the inner axial force reinforcing strip 13 is provided with enlarged gaps 13b (corresponding to the gaps of the present invention) in which the space between the strip members 13A and 13A is larger than the gap 13a at predetermined three locations.
  • the enlarged gaps 13b are provided at three locations at a constant interval (that is, a pitch of 120 degrees) in the circumferential direction, and the small-diameter tubes 17 are provided over the entire length of the flexible pipe 1 in each enlarged gap 13b.
  • the small-diameter tube 17 of the inner axial force reinforcing strip 13 is arranged at a position shifted in the circumferential direction with respect to the small-diameter tube 17 of the outer axial force reinforcing strip 14. Moreover, in order to give the resin sheet 16 air permeability, it is also possible to efficiently ventilate the reinforcing strips by using a porous sheet or by winding with a gap.
  • the corrosion preventing structure for the flexible pipe 1 ⁇ / b> B includes three small-diameter tubes 17 (17 ⁇ / b> A, 17 ⁇ / b> B, 17 ⁇ / b> C) in the outer axial force reinforcing strip 14. It is the structure arrange
  • the positions of the ends 17b of the three small diameter tubes 17 (17A, 17B, 17C) are different in the pipe axial direction (X direction). It has a configuration.
  • the distal end 17b of the first small-diameter tube 17A is provided at a position near the pipe distal end 1b (first position P1), and the distal end 17b of the second small-diameter tube 17B is a predetermined position on the base end side by a predetermined distance from the first position P1.
  • the distal end 17b of the third small diameter tube 17C is provided at a predetermined position (third position P3) on the base end side by a predetermined distance further than the second position P2.
  • the corrosive gas is discharged using the collection tank 4 (see FIG. 6) of the first embodiment for each of the positions P1, P2, and P3 of the ends 17b of the small diameter tubes 17A, 17B, and 17C. Therefore, it is possible to accurately confirm the gas concentration at a plurality of positions in the axial direction X of the flexible pipe 1 by measuring the amount of corrosive gas discharged from each of the small diameter tubes 17A, 17B, and 17C. Can do.
  • the corrosion prevention structure of the flexible pipe by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
  • positioning location of the small diameter tube 17 provided in the reinforcement layer T is not limited to embodiment mentioned above.
  • the small-diameter tube 17 may be disposed only on the inner axial force reinforcing strip 13, or the small-diameter tube 17 may be disposed along the gap of the internal pressure reinforcing strip 12 formed of a C-shaped strip.
  • the recovery tank 4 is provided on the sea, and the corrosive gas sucked out by the small diameter tube 17 is released to the recovery tank 4, but not limited to this, the base end portion 17a of the small diameter tube 17 is opened to the atmosphere.
  • the gas may be directly released to the atmosphere without using the recovery tank 4.
  • the configuration of the small diameter tube 17 such as the inner diameter, the material, the number, the arrangement interval, and the position of the end portion 17b can be arbitrarily set according to conditions such as the type of reinforcing strip, the configuration and length of the flexible pipe, and the like. It is. In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described embodiments may be appropriately combined.
  • the corrosive gas accumulated in the reinforcing layer can be forcibly discharged by moving from the end of the small diameter tube toward the base end. Further, the concentration of the corrosive gas in the reinforcing layer can be lowered by ventilating the corrosive gas with fresh air. As a result, corrosion of the reinforcing strip made of steel can be suppressed, and the durability of the flexible pipe can be improved.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention porte sur une structure de prévention de la corrosion telle que, même dans une eau très profonde, un gaz corrosif contenu dans une couche de renforcement peut être remplacé de manière fiable par de l'air frais, que la corrosion des ensembles de barres de renforcement contenus dans la couche de renforcement peut être évitée et qu'il est possible d'obtenir une haute résistance mécanique en utilisant du carbone. Un tuyau souple (1) comporte un tuyau intérieur (11) présentant une étanchéité aux liquides ; une gaine extérieure (15) ; ainsi qu'un ensemble de barres de renforcement de force axiale intérieures (13) et qu'un ensemble de barres de renforcement de force axiale extérieures (14), qui sont tous deux composés de barres tordues en hélice et sont disposés dans une couche de renforcement (T) entre le tuyau intérieur (11) et la gaine extérieure (15). Ledit tuyau souple (1) constitue la structure de prévention de la corrosion de telle sorte que le gaz corrosif contenu dans la couche de renforcement (T) qui est disposée entre le tuyau intérieur (11) et la gaine extérieure (15) est expulsé axialement depuis le côté extrême de pointe vers le côté extrême de base. En outre, le tuyau souple (1) est configuré de telle sorte qu'une pluralité de tuyaux de petit diamètre (17) y sont montés, lesquels sont disposés dans les espaces libres hélicoïdaux élargis (14b) qui sont prévus entre les barres de l'ensemble de barres de renforcement de force axiale extérieures (14), et qui s'étendent de façon continue le long de la direction axiale du tuyau.
PCT/JP2011/050107 2010-01-08 2011-01-06 Structure de prévention de la corrosion pour tuyau souple Ceased WO2011083819A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-002970 2010-01-08
JP2010002970A JP2011141004A (ja) 2010-01-08 2010-01-08 フレキシブルパイプの腐食防止構造

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012092931A1 (fr) * 2011-01-06 2012-07-12 National Oilwell Varco Denmark I/S Tuyau souple non collé
WO2013152770A1 (fr) * 2012-04-12 2013-10-17 National Oilwell Varco Denmark I/S Procédé de fabrication d'un tuyau flexible non collé et tuyau flexible non collé
WO2015121616A1 (fr) * 2014-02-11 2015-08-20 Ge Oil & Gas Uk Limited Apport de fluide prédéterminé
WO2019141326A1 (fr) * 2018-01-18 2019-07-25 National Oilwell Varco Denmark I/S Procédé et système de circulation d'un liquide de rinçage dans un tuyau flexible
WO2020099228A1 (fr) * 2018-11-13 2020-05-22 National Oilwell Varco Denmark I/S Procédé de rinçage d'un tuyau souple et assemblage d'un tuyau souple et d'un embout

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5739764B2 (ja) * 2011-08-10 2015-06-24 古河電気工業株式会社 流体輸送用可撓管、腐食性ガスの抜き取り方法、流体輸送システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226787A (ja) * 1983-06-09 1984-12-19 横浜ゴム株式会社 高圧ゴムホ−ス
JPS60118080U (ja) * 1984-01-19 1985-08-09 古河電気工業株式会社 複合パイプ
JPS6383486A (ja) * 1986-09-22 1988-04-14 古河電気工業株式会社 可撓性複合管の透過ガス除去方法
JPH01171989U (fr) * 1988-05-24 1989-12-06

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226787A (ja) * 1983-06-09 1984-12-19 横浜ゴム株式会社 高圧ゴムホ−ス
JPS60118080U (ja) * 1984-01-19 1985-08-09 古河電気工業株式会社 複合パイプ
JPS6383486A (ja) * 1986-09-22 1988-04-14 古河電気工業株式会社 可撓性複合管の透過ガス除去方法
JPH01171989U (fr) * 1988-05-24 1989-12-06

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012092931A1 (fr) * 2011-01-06 2012-07-12 National Oilwell Varco Denmark I/S Tuyau souple non collé
US9523446B2 (en) 2011-01-06 2016-12-20 National Oilwell Varco Denmark I/S Unbonded flexible pipe
WO2013152770A1 (fr) * 2012-04-12 2013-10-17 National Oilwell Varco Denmark I/S Procédé de fabrication d'un tuyau flexible non collé et tuyau flexible non collé
US9796148B2 (en) 2012-04-12 2017-10-24 National Oilwell Varco Denmark I/S Method of producing an unbonded flexible pipe
WO2015121616A1 (fr) * 2014-02-11 2015-08-20 Ge Oil & Gas Uk Limited Apport de fluide prédéterminé
US10139021B2 (en) 2014-02-11 2018-11-27 Ge Oil & Gas Uk Limited Provision of predetermined fluid
WO2019141326A1 (fr) * 2018-01-18 2019-07-25 National Oilwell Varco Denmark I/S Procédé et système de circulation d'un liquide de rinçage dans un tuyau flexible
WO2020099228A1 (fr) * 2018-11-13 2020-05-22 National Oilwell Varco Denmark I/S Procédé de rinçage d'un tuyau souple et assemblage d'un tuyau souple et d'un embout

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Publication number Publication date
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