WO2000031458A1 - Dispositif de revetement interieur de tuyau et procede correspondant - Google Patents

Dispositif de revetement interieur de tuyau et procede correspondant Download PDF

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Publication number
WO2000031458A1
WO2000031458A1 PCT/GB1999/003214 GB9903214W WO0031458A1 WO 2000031458 A1 WO2000031458 A1 WO 2000031458A1 GB 9903214 W GB9903214 W GB 9903214W WO 0031458 A1 WO0031458 A1 WO 0031458A1
Authority
WO
WIPO (PCT)
Prior art keywords
liner
tube
pipe
polyethylene
lining
Prior art date
Application number
PCT/GB1999/003214
Other languages
English (en)
Inventor
Arthur Geoffrey Gibson
Original Assignee
Mainetti Technology 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 Mainetti Technology Limited filed Critical Mainetti Technology Limited
Priority to AU62141/99A priority Critical patent/AU6214199A/en
Publication of WO2000031458A1 publication Critical patent/WO2000031458A1/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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the present invention relates to a method of lining a pipe, and relates particularly, but not exclusively, to a method of lining a rigid undersea pipe for transporting water and/or hydrocarbon fuels and/or gas.
  • the invention also relates to a liner for lining a pipe.
  • Pipes of various materials such as concrete, clay, brick, mild steel, cast iron or lead often deteriorate with age and/or chemical attack. It is known to reline such pipes with plastics materials such as polyethylene rather than replace them.
  • Methods of relining pipes with polyethylene which include drawing down a polyethylene pipe to reduce its diameter, and inserting the polyethylene pipe into the pipe to be relined. After insertion, the polyethylene pipe is expanded to its original, larger diameter to provide a close interference fit inside the original pipe. Expansion of the polyethylene liner pipe can be achieved either by the natural recovery of the polyethylene pipe from its drawn down condition, or by the application of pressure and/or heat.
  • One known attempt to solve this problem is to provide a thick polyethylene liner pipe, for example having a thickness as much as 10 mm. This reduces the rate at which the liquid or gas diffuses through the polyethylene to occupy the voids, and also provides additional resistance to collapse in the event that the external pressure (i.e. the pressure in the voids between the polyethylene liner pipe and the steel outer pipe) exceeds the internal pressure.
  • the thick walled polyethylene liner pipes used reduce the internal diameter of the pipe, which in turn reduces the transport capacity of the pipe as a whole .
  • Preferred embodiments of the present invention seek to overcome the above disadvantages of the prior art .
  • a method of lining a pipe comprising: inserting a liner into the pipe, the liner comprising a first elongate tube of plastics material and a second elongate tube of metal attached to said first tube and arranged radially outwardly thereof, wherein the external dimensions of said liner in a direction transverse to the longitudinal axis of the liner are smaller on insertion than the corresponding dimensions of the pipe; and
  • the present invention is based on the unexpected discovery that a composite pipe comprising a tube of plastics material and a metal tube often expands much more uniformly than a tube of plastics material only. For example, it has been found that a polyethylene pipe does not expand uniformly under internal pressure, and ruptures at its weakest part, whereas composite pipes of polyethylene and metal expand more uniformly and can achieve diameters as much as 15% larger than their original diameter.
  • the method of the present invention therefore provides the advantage that the liner pipe is less prone to rupture on expansion than the liner pipes of the prior art.
  • the method of the present invention also provides the advantage that the metal tube minimises migration of a gas or liquid to be transported through the liner to cause chemical attack of an outer pipe, and the metal layer stretched beyond its elastic limit can also hold the liner at its increased diameter. Because the metal tube minimises migration of the gas and/or liquid to be transported into voids between the liner and the outer pipe, this minimises the risk of collapse of the liner when the pipe is depressurised. Consequently, relatively thin walled liners can be used with the advantage that transport capacity of the pipe as a whole is maximised, and material costs are reduced.
  • the step of increasing fluid pressure in the first tube comprises increasing the pressure of air within the tube.
  • the pipe and liner may be of substantially circular transverse cross-section.
  • the liner is flattened and coiled prior to said insertion step.
  • the method is preferably a method of lining rigid undersea pipes .
  • the pipe is adapted to transport water and/or gas and/or hydrocarbon fuel .
  • the method preferably further comprises the step of pre- stressing said first tube during manufacture of said liner such that expansion of said liner reduces the stress in said first tube .
  • a liner for lining a pipe comprising a first elongate tube of plastics material and a second elongate tube of metal attached to said first tube and arranged radially outwardly thereof, wherein the liner is adapted to be inserted into a pipe having external dimensions in a direction transverse to the longitudinal axis of the liner greater than the corresponding dimensions of the liner, and said liner is adapted to be expanded by increasing fluid pressure in said first tube such that the external dimensions of the liner correspond substantially to the internal dimensions of the pipe, and said second tube is expanded beyond its elastic limit .
  • the liner may further comprise a third tube of plastics material surrounding said second tube.
  • the second tube may include aluminium.
  • the first tube preferably includes polyethylene.
  • the first tube may include cross linked polyethylene.
  • the pipe and liner are of substantially circular transverse cross-section.
  • the liner is preferably adapted to be flattened and coiled prior to insertion into the pipe.
  • Figure 1 is a cross-sectional view of a polyethylene pipe and adhesive layer for use in manufacturing a liner pipe for use in a method embodying the present invention
  • Figure 2 is a cross- sectional view of the polyethylene pipe and adhesive layer of Figure 1 having an aluminium tube attached thereto; and Figure 3 is a cross-sectional view of a liner manufactured from the tubes of Figures 1 and 2 for use in a method embodying the present invention.
  • a double tube 1 is produced by extrusion and comprises an inner layer 2 of polyethylene, preferably cross linked polyethylene, and an outer thin layer of adhesive 3. After extrusion, the tube 1 is allowed to cool .
  • a sheet 4 of aluminium is then wrapped around the tube 1, and a seam of the aluminium sheet 4 continuously welded by means of a laser or other suitable welding device as will be familiar to persons skilled in the art.
  • the aluminium layer 4 is drawn down so that it is a tight fit over the double tube 1.
  • the double tube 1 with the aluminium layer 4 thereon is then passed through an induction heater (not shown) which heats the aluminium layer 4, which in turn activates the adhesive layer 3 and causes the aluminium layer 4 and polyethylene layer 2 to be bonded together.
  • the composite polyethylene and aluminium tube is then passed through a second extrusion phase where a layer 5 of adhesive and an outer thicker layer 6 of polyethylene are laid over the outside of the aluminium layer 4, as shown in Figure 3.
  • the aluminium layer 4 is stretched beyond its elastic limit, as a result of which the aluminium layer 4 holds the composite tube at this increased diameter.
  • the inner polyethylene layer 2 then protects the outer pipe from chemical attack by a gas or liquid to be transported, while the aluminium layer 4 minimises diffusion of gas or liquid into voids between the outer polyethylene tube 6 and the outer pipe .
  • the reduced wall thickness of the composite tube of Figure 3 compared with prior art liner pipes enables the liner pipe (which may be as large as 200 mm in diameter) to be squashed flat and coiled for shipment to site prior to installation in the outer pipeline. This significantly reduces the need for joints in the liner pipe, which in turn simplifies manufacture.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Ce tube composite servant au revêtement intérieur d'un tuyau comporte une couche interne de polyéthylène (2), une couche d'aluminium (4) et une couche externe de polyéthylène (6). Ce tube est inséré dans un tuyau et l'on augmente la pression d'air ou de gaz y régnant pour provoquer l'expansion de celui-ci et ce, jusqu'à ce que ses dimensions extérieures correspondent aux dimensions intérieures du tuyau et que la couche d'aluminium se soit dilatée au delà de son seuil de plasticité.
PCT/GB1999/003214 1998-11-24 1999-09-27 Dispositif de revetement interieur de tuyau et procede correspondant WO2000031458A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62141/99A AU6214199A (en) 1998-11-24 1999-09-27 Pipe liner and pipe lining method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9825583.9A GB9825583D0 (en) 1998-11-24 1998-11-24 Pipe lining method
GB9825583.9 1998-11-24

Publications (1)

Publication Number Publication Date
WO2000031458A1 true WO2000031458A1 (fr) 2000-06-02

Family

ID=10842854

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/003214 WO2000031458A1 (fr) 1998-11-24 1999-09-27 Dispositif de revetement interieur de tuyau et procede correspondant

Country Status (3)

Country Link
AU (1) AU6214199A (fr)
GB (1) GB9825583D0 (fr)
WO (1) WO2000031458A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357559B (en) * 1999-12-24 2004-06-16 Glynwed Pipe Systems Ltd Multi-layer liner for pipes
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US8985154B2 (en) 2007-10-23 2015-03-24 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
CN104534193A (zh) * 2015-01-09 2015-04-22 大庆高新区法尔文得新材料有限公司 超高分子量聚乙烯内衬复合管生产方法及装置
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
US9206676B2 (en) 2009-12-15 2015-12-08 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9890880B2 (en) 2012-08-10 2018-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors
CN113374944A (zh) * 2021-05-27 2021-09-10 安徽杰蓝特新材料有限公司 一种抗氧化的聚乙烯复合管及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270347A1 (fr) * 1986-12-02 1988-06-08 Handy & Harman Automotive Group Inc. Tuyau composé à carburant et vapeur ayant une résistance élevée à la chaleur
US4861634A (en) * 1985-12-27 1989-08-29 Coopetanche S.A. Method for internally lining ducts and sleeves for ducts lined with this method
WO1992015818A1 (fr) * 1991-03-06 1992-09-17 Wavin B.V. Procede, conduit et dispositif d'adaptation d'un tube interieur dans un conduit existant appliquant des moyens d'aeration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4861634A (en) * 1985-12-27 1989-08-29 Coopetanche S.A. Method for internally lining ducts and sleeves for ducts lined with this method
EP0270347A1 (fr) * 1986-12-02 1988-06-08 Handy & Harman Automotive Group Inc. Tuyau composé à carburant et vapeur ayant une résistance élevée à la chaleur
WO1992015818A1 (fr) * 1991-03-06 1992-09-17 Wavin B.V. Procede, conduit et dispositif d'adaptation d'un tube interieur dans un conduit existant appliquant des moyens d'aeration

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357559B (en) * 1999-12-24 2004-06-16 Glynwed Pipe Systems Ltd Multi-layer liner for pipes
US8985154B2 (en) 2007-10-23 2015-03-24 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9206676B2 (en) 2009-12-15 2015-12-08 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9890880B2 (en) 2012-08-10 2018-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors
CN104534193A (zh) * 2015-01-09 2015-04-22 大庆高新区法尔文得新材料有限公司 超高分子量聚乙烯内衬复合管生产方法及装置
CN113374944A (zh) * 2021-05-27 2021-09-10 安徽杰蓝特新材料有限公司 一种抗氧化的聚乙烯复合管及其制备方法

Also Published As

Publication number Publication date
AU6214199A (en) 2000-06-13
GB9825583D0 (en) 1999-01-13

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