[go: up one dir, main page]

WO2003098093A1 - Procedes et systemes de tuyau-dans-tuyau rigides, thermo-isoles - Google Patents

Procedes et systemes de tuyau-dans-tuyau rigides, thermo-isoles Download PDF

Info

Publication number
WO2003098093A1
WO2003098093A1 PCT/GB2003/001580 GB0301580W WO03098093A1 WO 2003098093 A1 WO2003098093 A1 WO 2003098093A1 GB 0301580 W GB0301580 W GB 0301580W WO 03098093 A1 WO03098093 A1 WO 03098093A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
rigid
bars
thermally insulated
thermal insulation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB2003/001580
Other languages
English (en)
Inventor
Michael Antoine Bell
Sylvain Denniel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technip Energies France SAS
Technip UK Ltd
Original Assignee
Coflexip SA
Technip France SAS
Coflexip Stena Offshore Ltd
Technip Offshore UK 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 Coflexip SA, Technip France SAS, Coflexip Stena Offshore Ltd, Technip Offshore UK Ltd filed Critical Coflexip SA
Priority to AU2003224273A priority Critical patent/AU2003224273A1/en
Publication of WO2003098093A1 publication Critical patent/WO2003098093A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/027—Bands, cords, strips or the like for helically winding around a cylindrical object

Definitions

  • the present invention relates to pipe-in-pipe systems of the type comprising a rigid inner pipe surrounded by a rigid outer pipe and having thermally insulating material provided in the annulus between the inner and outer pipes.
  • the invention relates especially to such systems and associated methods particularly for subsea pipelines laid from a pipelaying vessel by the reel pipelay method.
  • Pipe-in-pipe systems are double walled pipe structures typically used in subsea production lines (particularly for the transport of hydrocarbon products) that require the high level of thermal insulation which can be provided by filling the annulus of the pipe-in-pipe structure with thermally insulating material. Furthermore, the interior of the annulus of the pipe-in-pipe structure is dry, so that the thermal insulation material is protected from water. Also, the interior of the annulus may be maintained at atmospheric pressure, so that the insulating material may not be subject to the hydrostatic pressure that is supported by the external pipe (“carrier pipe”), or to the internal pressure of the fluid in the internal pipe (“flowline”) . For these reasons, the rigid pipe-in- pipe structure provides an arrangement that allows the use of a wide variety of thermal insulation materials with good insulation properties (low lambda) .
  • the reeling technique comprises assembling the pipeline on shore and spooling the pipeline onto a reel which is subsequently transported to the production site where it is unreeled along the required pipeline path. This allows the pipeline to be laid much more quickly, so that the vessel is not required for as long a period as in the case of J-lay/S-lay .
  • the rigid pipeline is subjected to plastic deformation while being spooled onto the reel, and the plastic deformation is removed by straightening mechanisms while the pipeline is being unreeled.
  • tension is applied to the pipeline to conform the carrier pipe to the reel.
  • the carrier pipe is bent through direct contact with the reel drum, or with previously spooled layers of the pipeline.
  • the bending forces are transferred from the carrier pipe to the flowline by spacers or annular walls disposed along the length of the pipeline in the annulus.
  • the pipeline is straightened by the carrier pipe being passed through straightening means, such as opposed rollers or roller track assemblies (as are well known in the art) .
  • the straightening forces are applied to the exterior of the carrier pipe, and are only transferred to the flowline at the locations of the spacers or annular walls inside the annulus. Accordingly, the carrier pipe can be fully straightened but it is not possible to fully straighten the flowline inside the carrier pipe.
  • the flowline therefore retains some residual curvature after the straightening process, depending on the pitch of the spacers in the annulus.
  • the resulting relative displacement of the flowline inside the carrier pipe results in local reductions in the annulus gap between the two pipes, leading to potential compression of the insulating material.
  • a rigid, thermally insulated pipe- in-pipe assembly comprising: a rigid inner pipe; a rigid outer pipe; an annulus defined between the inner and outer pipes ; and at least one thermal insulation layer located in said annulus; wherein: said at least one thermal insulation layer comprises a plurality of elongate bars wound along the length of said inner pipe, said bars including a first plurality of bars formed from a first material having a first lambda value and a first compressive strength and at least one additional bar formed from a second material having a second lambda value greater than said first lambda value and having a second compressive strength greater than said first compressive strength.
  • a rigid, thermally insulated pipe-in-pipe assembly in accordance with the first aspect of the invention may be laid using the reel pipelaying method by spooling the pipe-in-pipe assembly onto a reel by plastically bending the pipe-in-pipe assembly around the reel, and subsequently unreeling the pipe-in- pipe assembly from the reel along a pipeline path while straightening the plastically bent pipe-in- pipe assembly.
  • a method of forming a rigid, thermally insulated pipe-in-pipe assembly comprising: providing a length of rigid inner pipe; applying at least one thermal insulation layer to the external surface of said inner pipe by winding a plurality of elongate bars along the length of said inner pipe, said bars including a first plurality of bars formed from a first material having a first lambda value and a first compressive strength and at least one additional bar formed from a second material having a second lambda value greater than said first lambda value and having a second compressive strength greater than said first compressive strength; and inserting said inner pipe with said at least one thermal insulation layer into a rigid outer pipe.
  • Fig. 1 is a partially cut away perspective view of a first embodiment of a pipe-in-pipe assembly in accordance with the present invention
  • Fig. 2 is a partial cross sectional view of a pipe- in-pipe assembly illustrating further preferred features of embodiments of the invention
  • FIG. 3 is a partial cross sectional view of a pipe- in-pipe assembly illustrating a further embodiment of the invention
  • Figs. 4a - 4e are schematic illustrations of alternative cross sections of insulating strip materials employed in the present invention.
  • Fig. 5 is a partially cut away perspective view of a further embodiment of a pipe-in-pipe assembly in accordance with the present invention.
  • Fig. 1 shows a thermally insulated pipe-in-pipe structure comprising a rigid inner pipe or flowline 10, a rigid outer pipe or carrier 12, and thermally insulating material disposed in the annulus between the flowline 10 and carrier 12.
  • the thermally insulating material comprises a plurality of bars or strips of a first material 14 and at least one bar or strip of a second material 16.
  • the bars 14 and 16 are wound upon the flowline so as to extend along its longitudinal axis in a serpentine manner.
  • the bars 14, 16 may be wound helically upon the flowline.
  • the apparatus required for continuous helical winding is relatively complex and expensive. It is preferred that, as illustrated, the bars 14, 16 are wound in a so-called "S/Z” or “reversing lay” (“pseudo- helical") configuration (as described, for example, in GB-A-2219063, in relation to forming flexible, multi -conductor lines) , in which the direction of winding is reversed periodically.
  • This technique does not require the flowline 10 to be rotated continuously relative to the bars 14, 16, simplifying the required apparatus.
  • helical winding means either genuine, continuous helical winding or pseudo-helical winding such as S/Z winding.
  • Fig. 1 for the sake of clarity, the direction of winding is shown as being reversed about every 90 degrees. In other embodiments, the direction of winding is reversed after approximately a complete turn of the bars 14, 16 about the flowline 10.
  • the machine used for winding the insulated bars 14 , 16 in continuous helical winding or pseudo-helical winding can be any one of a variety of many different types. It may be a classical helical lay or spiralling machine using a rotating device sharing the reels that supply the insulated bars to be wound. It can also be a winding machine where the bars are provided to a rotating twist head through a plurality of rotating plates which hold the insulated bars around the flowline and in parallel relationship. The plates are co-ordinated in rotation and in certain cases are able to advance simultaneously, the bars being assembled by predetermined length.
  • the insulated bars could be assembled step by step (by a predetermined length) as the process of winding is going on, contrary to the classical helical lay machine where the insulated bars are stored on reels shared on a rotating device (i.e. a continuous process) .
  • the winding machine can use a plurality of spaced rotating plates co-ordinated in rotation but with fixed reels for supplying the insulated bars. This kind of winding machine also avoids the need for a rotating device sharing the supply reels of the classical spiralling machine.
  • the first material 14 comprises a material having relatively high thermal insulation properties (low lambda) and, correspondingly, relatively low mechanical (compressive) strength.
  • the second material 16 comprises a material having relatively lower thermal insulation properties (higher lambda) and, correspondingly, relatively higher mechanical (compressive) strength.
  • the first material 14 covers the majority of the surface area of the flowline 10, providing good thermal insulation.
  • the second material covers the remainder of the surface area of the flowline 10, and serves to transmit bending forces applied to the carrier 12 to the flowline 10 during spooling and subsequent straightening of the pipe assembly.
  • the second material 16 is sufficiently strong to resist being crushed during bending of the pipe assembly, and protects the first material against excessive compressive stresses.
  • the second material should occupy as little as possible of the annulus volume, so as to maximise the thermal insulation properties, whilst providing the required mechanical support between the flowline 10 and carrier 12.
  • the second material may constitute 20% or more of the volume of the insulating layer.
  • the bars of the second material 16 thus act as helical spacers, avoiding the need for conventional annular spacers.
  • the number and arrangement of the helical spacers 16 is selected so as to limit any deformation (crushing) of the first insulating material 14 during bending and/or straightening to an acceptable value.
  • the spacers 16 may have a radial depth substantially equal to that of the first material 14 or, as shown in Fig. 2, the radial depth h2 of the second bars 16 may be greater than that, hi, of the first bars 14, in order to better protect the first bars 14 from crushing during bending/straightening.
  • the winding pitch, and the degree of compression of the first material 14 that is acceptable there should be at least one bar of the second material 16.
  • a single high strength bar 16 could be used with a winding pitch of two meters, or two bars 16 could be used with a winding pitch of four meters.
  • more than one bar of the second material 16 these will generally be spaced equidistantly around the circumference of the flowline 10, with a plurality of bars of the first material 14 located therebetween. In the illustrated embodiments, three bars of the second material 16 are used.
  • the thermally insulating, high strength bars 16 serve to maintain the flowline 10 in a concentric position in the carrier pipe 12, limiting any displacement of the flowline, and limiting any heat loss through the spacers 16 themselves.
  • the invention has a number of other advantages related to the manufacturing of the pipeline.
  • the insulating materials may be applied in a substantially continuous process by means of a winding machine, without the need of a step-by-step process to apply discrete spacers and/or insulating elements as in previous methods.
  • the method also makes it easy to incorporate heating cables, or other secondary hoses for active heating, conduits or electrical or optical cables or the like 18 in the insulating layers (e.g. disposed in recesses 20 formed in the bars, preferably in the inner faces of the bars, and most preferably in the bars of the second material 14) .
  • the pipe-in-pipe structure of the invention may be formed by winding the materials 14, 16 onto the exterior surface of a length of the inner pipe 10 and the inner pipe 10 with the materials 14, 16 applied thereto may then be inserted into the outer pipe 12.
  • a plurality of inner pipe sections may be assembled together prior to applying the materials 14, 16, and a plurality of outer pipe sections may be assembled together prior to inserting the insulated inner pipe therein.
  • the cross sectional size and shape of the first and second bars 14 and 16 may be substantially identical, although it may be desirable for the second bars 16 to have a greater radial depth than the first bars 14, as discussed above.
  • the radially opposed faces of the bars 14, 16 may be curved to match the curvatures of the flowline 10 and carrier pipe 12, and their lateral faces may have complementary curvatures and/or overlapping features to reduce convection along the radial gaps between adjacent bars.
  • multiple (generally two or three) layers of insulating materials 14 and 16 may be applied.
  • the high strength bars 16 of the various layers should cross one another in order to transmit bending forces through the crossing points from the outer layer to the flowline 10.
  • the bars of adjacent layers may be wound out of phase and/or with differing pitches and/or in opposite directions.
  • the second material 16 will generally have to be capable of supporting compressive forces up to about 300 kN.
  • the second material 16 might suitably have a shore hardness (D) greater than 50 and a lambda value less than 0.3 W/Km.
  • the second material 16 might suitably comprise a polyamide reinforced by glass fibre.
  • the first material suitably has a lambda value less than 0.1 W/Km and may comprise, for example, polyurethane (PU) foam, rubber foam, PVC foam, aerogel or syntactic foam.
  • PU polyurethane
  • the bars 14, 16 are preferably wound with a relatively long pitch (i.e. with a winding angle less than about 35 degrees) .

Landscapes

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

Abstract

Ensemble tuyau-dans-tuyau comprenant un tuyau interne rigide (10); un tuyau externe rigide (12); un anneau formé entre les tuyaux interne et externe et au moins une couche thermo-isolante placée dans l'anneau. Au moins une couche thermo-isolante comprend une pluralité de barres allongées (14, 16) enroulées le long du tuyau interne, ces barres comprenant une première pluralité de barres (14) formées dans un premier matériau d'une première valeur lambda et présentant une première résistance à la compression, et au moins une barre additionnelle (16) formée dans un second matériau d'une seconde valeur lambda supérieure à la première et présentant une seconde résistance à la compression supérieure à la première. L'invention porte également sur un procédé de formation d'un ensemble tuyau-dans-tuyau rigide, thermo-isolé.
PCT/GB2003/001580 2002-05-17 2003-04-10 Procedes et systemes de tuyau-dans-tuyau rigides, thermo-isoles Ceased WO2003098093A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003224273A AU2003224273A1 (en) 2002-05-17 2003-04-10 Thermally insulated, rigid pipe-in-pipe systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0211299A GB2388641B (en) 2002-05-17 2002-05-17 Thermally insulated, rigid pipe-in-pipe systems and methods
GB0211299.3 2002-05-17

Publications (1)

Publication Number Publication Date
WO2003098093A1 true WO2003098093A1 (fr) 2003-11-27

Family

ID=9936851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/001580 Ceased WO2003098093A1 (fr) 2002-05-17 2003-04-10 Procedes et systemes de tuyau-dans-tuyau rigides, thermo-isoles

Country Status (3)

Country Link
AU (1) AU2003224273A1 (fr)
GB (1) GB2388641B (fr)
WO (1) WO2003098093A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6981525B2 (en) 2003-11-08 2006-01-03 Subsea 7 Bv Tubular insulating apparatus and method
CN106979387A (zh) * 2017-06-06 2017-07-25 肥西县碧涛建材有限公司 一种保温管及其制备方法
EP3859197A1 (fr) * 2020-01-30 2021-08-04 Robatech AG Tuyau chauffant destiné au transport d'un liquide, en particulier au transport d'un adhésif

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085013A2 (fr) * 2006-01-20 2007-07-26 Cuming Corporation Conduite sous-marine isolée au moyen d'un revêtement isolant souple
NL2005241C2 (en) * 2010-08-18 2012-02-21 Heerema Marine Contractors Nl Pipe element for constructing a double walled pipeline.
GB2494180B (en) 2011-09-02 2013-09-04 Technip France A connector arrangement for pipe-in-pipe pipeline
CN102661451A (zh) * 2012-05-05 2012-09-12 漳州日盛建筑陶瓷有限公司 发泡陶瓷保温管及其制备方法
FR3042842B1 (fr) 2015-10-22 2018-05-04 Technip France Procede d'assemblage d'une conduite rigide et conduite associee

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525658A1 (de) * 1966-06-01 1969-11-20 Goepfert Dipl Ing Joseph Waermeisoliertes Leitungsrohr
DE2740666A1 (de) * 1977-09-09 1979-03-15 Pforzheim Metallschlauch Schwimmfaehige schlauchleitung
GB2219063A (en) 1988-05-21 1989-11-29 Dunlop Ltd Method and apparatus for manufacture of an umbilical
WO2000066934A1 (fr) * 1999-04-30 2000-11-09 Coflexip Conduite calorifugee pour le transport de fluides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525658A1 (de) * 1966-06-01 1969-11-20 Goepfert Dipl Ing Joseph Waermeisoliertes Leitungsrohr
DE2740666A1 (de) * 1977-09-09 1979-03-15 Pforzheim Metallschlauch Schwimmfaehige schlauchleitung
GB2219063A (en) 1988-05-21 1989-11-29 Dunlop Ltd Method and apparatus for manufacture of an umbilical
WO2000066934A1 (fr) * 1999-04-30 2000-11-09 Coflexip Conduite calorifugee pour le transport de fluides

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6981525B2 (en) 2003-11-08 2006-01-03 Subsea 7 Bv Tubular insulating apparatus and method
CN106979387A (zh) * 2017-06-06 2017-07-25 肥西县碧涛建材有限公司 一种保温管及其制备方法
EP3859197A1 (fr) * 2020-01-30 2021-08-04 Robatech AG Tuyau chauffant destiné au transport d'un liquide, en particulier au transport d'un adhésif

Also Published As

Publication number Publication date
AU2003224273A1 (en) 2003-12-02
AU2003224273A8 (en) 2003-12-02
GB2388641B (en) 2005-02-16
GB2388641A (en) 2003-11-19
GB0211299D0 (en) 2002-06-26

Similar Documents

Publication Publication Date Title
AU2016214075B2 (en) Subsea pipe-in-pipe structures
US4979296A (en) Method for fabricating helical flowline bundles
US6323420B1 (en) Sub sea and sub surface tubing and conductors
US7243716B2 (en) Heated windable rigid duct for transporting fluids, particularly hydrocarbons
NO328990B1 (no) Flerrors fleksibel rorledning med hoy kompresjonsmotstand
RU2665776C1 (ru) Полимерная армированная труба с электроподогревом
AU2016221437B2 (en) Subsea pipe-in-pipe structures
AU2004274679B2 (en) Improved spacing and centering device for a rigid double-wall duct with a low heat transfer coefficient
WO2014003539A1 (fr) Revêtement intérieur d'oléoducs pour installations offshore
US3740958A (en) Method of fabricating and installing a submergible pipeline
CA1328040C (fr) Procede de fabrication de faisceaux tubulaires spirales
NZ198836A (en) Tubular protective sleeving on submarine cable
WO2003098093A1 (fr) Procedes et systemes de tuyau-dans-tuyau rigides, thermo-isoles
AU764330B2 (en) Heat-insulated duct for transporting fluids
US4843713A (en) Apparatus for making helical flowline bundles
US7523766B2 (en) Reinforced submarine pipeline and assembly of two coaxial pipelines comprising same
EP4264098B1 (fr) Fabrication d'assemblages de conduite à enveloppes multiples
GB2407857A (en) Pipe insulating apparatus and method
WO1994010492A1 (fr) Cable ombilical marin ameliore et son procede de production
WO2020005074A1 (fr) Câblerie flottante
EP3990814B1 (fr) Pipeline chauffé à haut rendement de chauffage et methode de fabrication
EP4355552B1 (fr) Fabrication de pipelines
RU177704U1 (ru) Высоконапорная полимерная армированная труба
Haug et al. Development And Test Results Of A Steel Tube Umbilical

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP