WO2018172751A1 - Raccord haute pression - Google Patents

Raccord haute pression Download PDF

Info

Publication number
WO2018172751A1
WO2018172751A1 PCT/GB2018/050709 GB2018050709W WO2018172751A1 WO 2018172751 A1 WO2018172751 A1 WO 2018172751A1 GB 2018050709 W GB2018050709 W GB 2018050709W WO 2018172751 A1 WO2018172751 A1 WO 2018172751A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
fitting
liner
internal diameter
compression ring
Prior art date
Application number
PCT/GB2018/050709
Other languages
English (en)
Inventor
Derek Muckle
Original Assignee
Radius Systems Limited
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 Radius Systems Limited filed Critical Radius Systems Limited
Priority to CN201880030984.4A priority Critical patent/CN110691939A/zh
Priority to RU2019129708A priority patent/RU2752226C2/ru
Publication of WO2018172751A1 publication Critical patent/WO2018172751A1/fr

Links

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
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • F16L58/1018—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the protective layer being fixed by means of anchoring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/346—Fixing the end of the lining
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/005—Protection of pipes or objects of similar shape against external or internal damage or wear specially adapted for the ends of pipes
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement

Definitions

  • This invention relates to a fitting suitable for use in pressurised pipelines such as those used in oil and gas exploration, gas transmission and water networks.
  • Pipelines for the transport of fluids at high pressure are often made from steel or other metal to provide high mechanical strength and containment of the fluid.
  • materials that are either corrosion resistant, have an active corrosion protection system, or have a barrier liner or coating between the metal and the transported fluid are either corrosion resistant, have an active corrosion protection system, or have a barrier liner or coating between the metal and the transported fluid.
  • Metals that are corrosion resistant tend to have a high capital cost, whilst the use of active corrosion prevention systems leads to higher annual operating costs over the lifetime of the pipeline.
  • solutions involving the use of coatings or liners to separate the metal from the corrosive fluid are increasingly employed.
  • FIG. 1 An example of a fitting that terminates a plastic liner to a length of steel pipe is described in GB2298256.
  • a hub piece is welded to the end of the steel pipe which comprises a CRA inlay and a series of circumferential grooves or teeth.
  • the liner is installed and trimmed such that the liner covers the circumferential grooves after which a CRA insert is inserted into the plastic liner to place it in compression against the said grooves.
  • This system has been widely used, for example, in the construction of water injection pipelines for the oil exploration industry and its limitations are understood.
  • a first concern is that the preferred embodiment has circumferential teeth which protrude into the bore of the metallic pipeline, rather than use grooves cut into the body of the metal.
  • the bore of the pipe is reduced further at the entry point for insertion of the liner meaning a greater diameter reduction is required.
  • a greater reduction can hinder the later recovery of the plastic which may not achieve a tight fit.
  • the placement of the insert causes a localised reduction in diameter of the lined pipe which restricts which applications the solution can be employed in. It can be used for example in water injection pipelines but not in hydrocarbon producing pipelines. The latter require inspection by pipe inspection 'pigs' that cannot pass through the localised reduction in diameter and also, hydrocarbon fluids tend to deposit waxy substances at disturbances in the pipe structure which could lead to blockages or increased pump energy requirements in service.
  • apparatus for connection to a polyolefin lined pipe comprising:
  • a pipe fitting comprising a hollow body having a bore with a first internal diameter at a first end, a second internal diameter greater than said first internal diameter proximate a second end, and a taper between the first end and the second end; a compression ring having an internal diameter and an external taper at one end; and
  • a generally cylindrical polyolefin liner which, where it is expanded against an inner surface of said pipe, has an internal diameter substantially equal to the internal diameter of the compression ring and may be attached to the pipe fitting by inserting said liner into the bore and subsequently inserting the compression ring into said liner, thereby compressing a portion of said liner into engagement with the attachment feature.
  • the liner and the compression ring have substantially the same internal diameter which means that there is no localised reduction in diameter of the bore which might impede the passage of inspection pigs, swabs or other elements which may need to pass through the lined pipe.
  • the liner has a thickness which, when compressed into engagement with the
  • the attachment feature by the compression ring may be locally reduced by 10%-30%.
  • the liner thickness is locally reduced by 20%.
  • the attachment feature has a shape which enables cold flow shaping of said polyolefin liner therein to provide both a labyrinth seal and a mechanical anchor.
  • the compression of the liner by the compression ring may cause part of the liner to plastically deform into the grooves, thereby firmly securing the liner in the fitting.
  • the angle of the taper on the pipe fitting may be substantially equal to the angle of the taper on the compression ring. This may help to provide relatively uniform compression of the liner between the taper on the compression ring and the taper on the pipe fitting that avoids localised wall damage to the liner resulting in a reduced thickness. Such a feature is desirable to avoid weakening of the liner in the immediate vicinity of the fitting where it is likely to experience axial loading when the pipeline first enters service.
  • the attachment feature comprises one or more circumferential grooves recessed into the inner surface of the fitting.
  • the attachment feature comprises two or more adjacent annular castellations protruding radially inwardly from the inner surface of the fitting, with grooves defined therebetween
  • the attachment feature may include between three and five of said grooves.
  • the attachment feature is disposed on said inner surface of said fitting between the second end and the taper of said fitting.
  • said first internal diameter of the pipe fitting is equal to the internal diameter of the pipe to which the apparatus is to be connected.
  • the bore of the pipe fitting has a third internal diameter at said second end, with said second internal diameter intermediate said first internal diameter and said third internal diameter, the third inner diameter being less than said second inner diameter and being greater or equal to the external diameter of the compression ring.
  • said third internal diameter defines an end face of the pipe fitting suitable for abutment sealing to another pipe or pipe fitting.
  • the pipe fitting has a formation on an outer surface thereof capable of retaining an assembly tool.
  • the kit may further comprise an assembly tool including a ram having an external diameter equal to or less than the internal diameter of the compression ring, a tapered leading edge and a substantially horizontal land on which said compression ring can be temporarily mounted.
  • the fitting may be attached to the pipe by
  • the method as described above may include the step of trimming the liner to a desired length after it has been inserted into the pipe and fitting.
  • Figure 1 shows a cross section of an assembled prior art pipe connection apparatus
  • Figure 2 shows a cross section of an assembled pipe connection apparatus in an embodiment of the present invention
  • Figure 3 shows the insertion of a compression ring into a lined fitting in an embodiment of the present invention
  • Figure 4 shows the insertion of a compression ring into a lined fitting wherein the entry diameter is constricted to permit the use of end face sealing means
  • Figure 1 shows a cross section of pipe 3 made from a material that is not corrosion resistant but which is lined with a corrosion resistant polyolefin liner 5 in a prior art configuration.
  • Pipe 3 is attached to fitting 1 by a welded joint 4.
  • Fitting 1 includes a region on its inner surface having castellations 25 with grooves 2 defined therebetween.
  • liner 5 is inserted into the pipe 3 and fitting 1 using a known process such as RolldownTM or SublineTM.
  • a compression ring 6 having an outer diameter slightly larger than the inner diameter of the liner 5 is then forced into the fitting 1 to approximately the same axial location as grooves 2 and castellations 25 so that the liner is compressed in that region.
  • a disadvantage of the prior art arrangement is that the compression ring 6 causes a local narrowing of the bore of the pipe. This impedes the passage of inspection pigs, swabs or other elements which may need to pass through the lined pipe.
  • Figure 2 shows a pipe 3' attached to a fitting V and lined with a liner 5', which is attached to the fitting using a compression ring 6' according to an embodiment of the present invention.
  • the liner 5' may comprise a corrosion resistant polyolefin.
  • Fitting T includes a region having a first internal diameter D1 substantially equal to the internal diameter of pipe 3' at a first end 21 , allowing it to be attached to pipe 3' via welded joint 4'.
  • Fitting V also includes a region having a second internal diameter D2 which is larger than the first internal diameter D1.
  • a plurality of annular castellations 25' defining grooves 2' therebetween are provided in the region of the fitting having the second internal diameter D2.
  • the castellations 25' may extend radially inwardly from the internal diameter D2 of the fitting T (as illustrated in Figure 2).
  • grooves may extend radially outwardly away from internal diameter D2 of the fitting. Both possibilities are examples of an attachment feature for the liner which will be described in more detail below.
  • the difference between the first internal diameter D1 and the second internal diameter D2 of the fitting is preferably substantially double the wall thickness of compression ring 6'.
  • the inner surface of fitting V has a tapered portion 27 disposed between the first and second ends whose internal diameter increases from said first internal diameter D1 to said second internal diameter D2 at a substantially uniform rate.
  • the compression ring 6' also has a tapered portion 31 adjacent to a first end 33.
  • the outer diameter of the compression ring decreases at a substantially uniform rate from a maximum outer D4 diameter equal to the outer diameter of the compression ring to a minimum outer diameter D3 equal to the internal diameter of the compression ring.
  • a point 29 is formed at an end 33
  • the outer wall of the compression ring 6' has a generally wedge-shaped cross section in the tapered portion 31.
  • the rate of decrease of the outer diameter in the tapered portion 31 of the compression ring 6' is preferably substantially equal to the rate of increase of the internal diameter of the fitting V in the tapered portion 27 of fitting 1 '.
  • the compression ring 6' can be inserted into fitting Y in a similar way to the compression ring 6 shown in figure 1 , with the compression ring disposed at the same axial location as grooves 2'. Between three and five grooves are provided to ensure adequate attachment between the liner 5' and the fitting 1'.
  • the configuration of the compression ring and the fitting shown in figure 2 allows the commissioned pipe to have a bore of constant diameter, because the compression ring 6' does not protrude radially inwardly further than the liner 5' into the bore of the pipe 3'.
  • the relative sizes of the compression ring, the liner and the fitting that provide a commissioned pipe with a constant bore may be easily calculated.
  • the difference between the first D1 and second D2 internal diameters of the fitting may be approximately double the wall thickness of the compression ring 6', and the internal diameter of the compression ring D3 may be approximately equal to the inner diameter of the liner.
  • the thickness of the liner may be such that it is compressed when the compression ring is forced into place. The thickness may be locally reduced by 10-30%.
  • the embodiment shown in figure 2 provides a lined pipe and fitting having a generally uniform bore.
  • the fitting may be attached to another, similar fitting using various conventional methods including for example flange to flange connection to the corresponding surface of another fitting.
  • the liner 5' cannot cover the entire surface of the fitting and must be trimmed inside fitting T. This is because the part of the liner disposed near end surface 7' would be damaged when the fittings were welded together. A local increase in the bore in the region where the connection is made is therefore caused if the fittings are welded together.
  • Figure 3 shows an embodiment in which fittings V can be attached together by a mechanical means such as a flange 12 which preferably includes a sealing component 8.
  • a CRA (corrosion resistant alloy) inlay 9 can be provided with a reduction in the opening diameter D5 (the "third internal diameter") of the fitting.
  • Diameter D5 is larger than D4 to permit the passage of the compression ring 6' therethrough but is less than D2.
  • the reduced opening diameter D5 defines an end face of the pipe fitting suitable for abutment sealing to another pipe or pipe fitting.
  • the compression ring 6' may have a length such that when the compression ring 6' is fitted against the inlay 9, the compression ring 6' extends to the end face, thereby maintaining a continuous bore diameter throughout the fitting 1'.
  • the fitting to fitting abutment facilitates the use of optional sealing component 8.
  • the sealing component 8 may be a face to face gasket or sealing ring. Pipe strings can be subsequently butted together and joined to form a complete pipeline which is desirable to minimise the overall outermost diameter of the fitting for space constricted applications.
  • Figure 4 shows the insertion of a compression ring into a lined fitting using another method of the present invention.
  • the fitting 1 ' is provided with a formation on the external surface thereof which, in the illustrated embodiment, is a circumferential groove 1 1.
  • the formation 11 is used to retain an assembly tool
  • Fitting 1' is first attached to pipe 3' via welded joint 4', and liner 5' is then inserted into the fitting and pipe by conventional means and trimmed flush with end surface T of fitting 1 '.
  • an assembly tool 13 including a hydraulic ram or press 14, having the compression ring 6' temporarily mounted thereupon, is attached to fitting V using circumferential groove 11 as a temporary mounting point.
  • the compression ring 6' sits on a substantially horizontal land.
  • Compression of the plastic material of the liner 5' between D4 and D2 is preferably 20%, not less than 10% and no more than 30%.
  • FIGS. 2-4 show an attachment feature in the form of grooves and/or castellations 25' disposed on an inner surface of fitting , it will be understood that other attachment features for example a plurality of studs or bores would also be possible.
  • the claimed invention does not include how one fitting could be joined to another to enable multiple lined pipe sections to be joined to form a continuous pipeline. Suitable methods for this are matters of routine engineering principles and would include but not be limited to such examples as flange to flange jointing, screwed connections, mechanical couplers and pipe to pipe welding
  • fitting means a component for connecting a first pipe to a second, adjacent pipe.
  • a fitting may be connectable to the first pipe, or it may be integrally formed with the first pipe.

Abstract

La présente invention concerne un raccord (1') pour fixer ensemble des conduites en acier à faible teneur en carbone (3') avec des revêtements en polyoléfine (3'). Un anneau de compression (6') est inséré dans la conduite de sorte que l'alésage du pipeline mis en service reste constant.
PCT/GB2018/050709 2017-03-22 2018-03-19 Raccord haute pression WO2018172751A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880030984.4A CN110691939A (zh) 2017-03-22 2018-03-19 高压配件
RU2019129708A RU2752226C2 (ru) 2017-03-22 2018-03-19 Фитинг высокого давления

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1704521.2 2017-03-22
GB1704521.2A GB2560732B (en) 2017-03-22 2017-03-22 High pressure fitting

Publications (1)

Publication Number Publication Date
WO2018172751A1 true WO2018172751A1 (fr) 2018-09-27

Family

ID=58688430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2018/050709 WO2018172751A1 (fr) 2017-03-22 2018-03-19 Raccord haute pression

Country Status (4)

Country Link
CN (1) CN110691939A (fr)
GB (1) GB2560732B (fr)
RU (1) RU2752226C2 (fr)
WO (1) WO2018172751A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2588919B (en) * 2019-11-13 2022-01-26 Flowlining Ltd Improved methods for joining lined pipes and associated apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001939A (en) * 1963-08-15 1965-08-18 Taylor Tube Seal Inc Improved method of lining pipes and of joining lined pipes
GB2298256A (en) * 1995-02-23 1996-08-28 British Gas Plc Joining lined pipe items
US20030047939A1 (en) * 2000-09-08 2003-03-13 Whitehead Justin M. Apparatus and method for securing a tubular liner in a composite pipe
WO2009048772A1 (fr) * 2007-10-08 2009-04-16 Insituform Technologies, Inc. Assemblage soudé pour conduite doublée et ses composants

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US3047937A (en) * 1955-10-28 1962-08-07 Ciba Ltd Method of making lined pipe connections
US3268240A (en) * 1963-10-14 1966-08-23 Phillips Petroleum Co Plastic-lined conduit
US3338598A (en) * 1964-12-29 1967-08-29 Kurtz John Coupling method and devices for lined pipe
US4773479A (en) * 1987-05-27 1988-09-27 Guy Weldon E Corrosion guard tubing nipple
CN1029153C (zh) * 1992-09-25 1995-06-28 第十三冶金建设公司新技术开发公司 耐磨耐腐蚀复合钢管及其制造方法
GB9503679D0 (en) * 1995-02-23 1995-04-12 British Gas Plc Joining lined pipes
GB9510279D0 (en) * 1995-05-22 1995-07-19 Subterra Ltd Apparatus and methods for reducing plastics pipes
CN2646516Y (zh) * 2003-10-25 2004-10-06 宜兴市宙斯泵业有限公司 改良的涂塑钢管
CN101514771A (zh) * 2008-02-20 2009-08-26 甘国工 带热塑管端连接法兰的金属塑料复合管
CN201190844Y (zh) * 2008-04-30 2009-02-04 南通海容热能环境工程有限公司 脱硫浆液输送用钢衬超高分子量聚乙烯复合管
CN100552275C (zh) * 2008-08-21 2009-10-21 莱州市悦龙橡塑科技有限公司 用于海洋钻井平台的耐火液压胶管总成
CN104197113A (zh) * 2014-08-26 2014-12-10 东营方宇科技有限责任公司 一种三层复合油管及制作方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001939A (en) * 1963-08-15 1965-08-18 Taylor Tube Seal Inc Improved method of lining pipes and of joining lined pipes
GB2298256A (en) * 1995-02-23 1996-08-28 British Gas Plc Joining lined pipe items
US20030047939A1 (en) * 2000-09-08 2003-03-13 Whitehead Justin M. Apparatus and method for securing a tubular liner in a composite pipe
WO2009048772A1 (fr) * 2007-10-08 2009-04-16 Insituform Technologies, Inc. Assemblage soudé pour conduite doublée et ses composants

Also Published As

Publication number Publication date
RU2752226C2 (ru) 2021-07-23
GB201704521D0 (en) 2017-05-03
RU2019129708A (ru) 2021-04-22
CN110691939A (zh) 2020-01-14
RU2019129708A3 (fr) 2021-06-10
GB2560732B (en) 2021-07-21
GB2560732A (en) 2018-09-26

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