US20030102044A1 - Flexible conduit with flexible strip reinforcement - Google Patents

Flexible conduit with flexible strip reinforcement Download PDF

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Publication number
US20030102044A1
US20030102044A1 US10/312,754 US31275402A US2003102044A1 US 20030102044 A1 US20030102044 A1 US 20030102044A1 US 31275402 A US31275402 A US 31275402A US 2003102044 A1 US2003102044 A1 US 2003102044A1
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US
United States
Prior art keywords
strip
pipe
armor
ply
interlocked
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.)
Abandoned
Application number
US10/312,754
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English (en)
Inventor
Alain Coutarel
Francois Dupoiron
Philippe Espinasse
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 France SAS
Original Assignee
Coflexip SA
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 filed Critical Coflexip SA
Assigned to COFLEXIP reassignment COFLEXIP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COUTAREL, ALAIN, DUPOIRON, FRANCOIS, ESPINASSE, PHILIPPE FRANCOIS
Publication of US20030102044A1 publication Critical patent/US20030102044A1/en
Priority to US11/016,480 priority Critical patent/US7716803B2/en
Abandoned 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49885—Assembling or joining with coating before or during assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49888—Subsequently coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49892—Joining plate edge perpendicularly to frame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming

Definitions

  • the present invention relates to a flexible pipe for transporting, over long distances, a fluid that is under pressure and possibly at a high temperature, such as a gas, petroleum, water or other fluids.
  • the invention relates most particularly to a pipe intended for offshore oil production. It relates especially, first, to the bottom pipes, called “flow lines”, that is to say flexible pipes unwound from a barge in order to be laid generally on the bottom of the sea and connected to the subsea installations, such pipes working mainly in static mode, and, second, to the rising columns, called “risers”, that is to say flexible pipes connecting a surface installation such as a platform to the installations on the seabed and most of which do not lie on the seabed, such pipes working essentially in dynamic mode.
  • the flexible pipes used offshore must be able to withstand high internal pressures and/or external pressures and also withstand longitudinal bending, twisting or pulling without the risk of being ruptured.
  • a flexible pipe comprises in general, from the inside outward:
  • a structural assembly able to resist radial forces composed of a sealing sheath made of a plastic, generally a polymer, able to resist to a greater or lesser extent the chemical action of the fluid to be transported, and of a winding of a metal element wound in a helix with a short pitch;
  • an external protective sealing sheath made of a polymer.
  • a pressure vault resistant mainly to the pressure developed by the fluid in the sealing sheath and to the external pressure and consisting of the winding of one or more interlocked profiled metal wires (which may or may not be self-interlockable) wound in a helix with a short pitch (that is to say with a winding angle of close to 90°) ; the profiled wires have a cross section in the form of a Z or a T or derivatives thereof (teta or zeta) or in the form of a U, or more advantageously in the form of an I (cf. document WO 00/09 899).
  • a “rough-bore” pipe there is furthermore provided, inside the internal sealing sheath, a carcass consisting of an interlocked metal strip that serves to prevent the pipe from collapsing under the external pressure being exerted on said sheath.
  • a pressure vault may be used, too, in order also to contribute to the collapse resistance.
  • tensile armor tendons have been produced from drawn profiled wires which, for production reasons, are limited to width-to-height ratios (L/H) of less than 4, which means there is a large number (around 40) of wires in each armor ply even if these wires are improperly called “flat metal strips” as in document EP 0166385.
  • L/H width-to-height ratios
  • These wires are obtained from lesser extent the chemical action of the fluid to be transported, and of a winding of a metal element wound in a helix with a short pitch;
  • an external protective sealing sheath made of a polymer.
  • a pressure vault resistant mainly to the pressure developed by the fluid in the sealing sheath and to the external pressure and consisting of the winding of one or more interlocked profiled metal wires (which may or may not be self-interlockable) wound in a helix with a short pitch (that is to say with a winding angle of close to 90°) ; the profiled wires have a cross section in the form of a Z or a T or derivatives thereof (teta or zeta) or in the form of a U, or more advantageously in the form of an I (cf. document WO 00/09 899).
  • a “rough-bore” pipe there is furthermore provided, inside the internal sealing sheath, a carcass consisting of an interlocked metal strip that serves to prevent the pipe from collapsing under the external pressure being exerted on said sheath.
  • a pressure vault may be used, too, in order also to contribute to the collapse resistance.
  • tensile armor tendons have been produced from drawn profiled wires which, for production reasons, are limited to width-to-height ratios (L/H) of less than 4, which means there is a large number (around 40) of wires in each armor ply.
  • L/H width-to-height ratios
  • These wires are obtained from steel produced in a steelmaking plant by three factory conversion steps, firstly in the form of blooms, then, after rolling, in the form of coils of untreated wire, and then, after a possible heat treatment and drawing and/or rolling, in the form of coils of finished wire.
  • Non-interlocked wires of rectangular cross section are often used for the armor tendons, but it has already been proposed, in document FR 2 664 019, to use, for the first ply of armor tendons, interlockable wires, either by themselves (self-interlockable wires) or together with a secondary interlocking wire.
  • document FR 2 182 372 it is recommended to produce armor plies interlocked with a Z-shaped profiled wire.
  • Profiled wires have good mechanical properties (mechanical strength R m of around 800 to 1400 MPa) but are relatively expensive, especially when the wire is relatively wide and/or of complex shape. In addition, it becomes more difficult to use them when they are wide and thick, or when they have a relief; a prior forming operation is then generally necessary, which increases the manufacturing cost.
  • the objective of the invention is to propose a flexible pipe that does not have these drawbacks, while offering similar performance levels.
  • the invention achieves its objective by means of a flexible pipe comprising, from the inside outward: on the one hand, an impermeable structural assembly that withstands the radial forces, composed of an inner sealing sheath and at least one winding, wound in a helix with a short pitch, of one or more metal elements, and, on the other hand, at least one ply of tensile armor tendons wound with a long pitch, and an external protective sealing sheath made from a polymer, characterized in that at least one armor ply is made of a steel strip.
  • steel strip is understood to mean a product coming from a steelmaking plant after at least two factory conversion operations, namely the forming of a coiled sheet and then the rolling and slitting of said sheet in order to obtain the strip, that is to say a steel tape of small thickness (less than about 8 mm) which, in the unbent state, is generally characterized by a very high L/e ratio.
  • the strips have a lower cost than the profiled wires, for example two to four times as little depending on the complexity of the wire. They have a mechanical strength R m of around 600 to 900 MPa, generally lower than profiled wires, but they lend themselves very well to being formed (by bending or profiling), which increases their inertia and favors interlocking (self-interlocking or otherwise), as is known when they are used to form the carcass of the pipe. Moreover, the freedom in choosing the various possible ways of forming the strips makes it possible to select shapes that do not restrict flexibility substantially. Using strips in accordance with the invention makes it possible to save up to 30% of the manufacturing cost of the armor tendons.
  • the invention makes it possible in particular to produce interlocked armor plies and even all the interlocked armor plies, something which is not easily conceivable with interlockable or self-interlockable profiled wires for reasons of cost and difficulty of implementation.
  • the interlocked strips are designed to leave a gap between them so as to retain the flexibility of the pipe; the interlocking of the armor tendons makes it possible to control this gap under all operating conditions and therefore to counteract phenomena leading to armor destruction, such as buckling under external pressure.
  • the armor strip is more resistant to these modes of degradation.
  • the thickness of the strip is preferably greater than about 2 mm in order to avoid the problems of generalized corrosion.
  • the thickness e selected for the strip and the height H of the profile formed by bending depend on the inertia of the armor tendon needed to withstand the pipe operating conditions and especially the external pressure.
  • the width L′ of the armor strip depends essentially on the flexibility of the flexible pipe to be produced; to maintain good flexibility, it is opportune to preserve at least ten, and preferably twenty, armor tendons over the periphery so as to have at least ten gaps that will confer said flexibility. It will be preferable to use an armor strip whose L′/H ratio is between 3 and 20 and preferably greater than 4. This allows the number of armor tendons in each ply to be reduced.
  • the width L′ is the width of the strip bent in order to constitute an armor tendon of the ply, as opposed to the width L which is that of the tape, L′ and H being equal to L and e when the armor tendon is flat.
  • the tensile strength depends on the steel used, but steels are chosen to make it possible to obtain strips having high mechanical properties and sufficient elongation, in excess of 15% and preferably in excess of 25%.
  • plies of strip armor tendons in combination with at least one conventional ply of profiled wire, for example a ply of interlocked T-wire, as known from the aforementioned document FR 2 664 019.
  • the strip is given a T-shaped or W-shaped profile with a central bend and interlocking flanges.
  • the central bend may be at the bottom or the top depending on the desired inertia.
  • the flanges allow interlocking with a reverse-wound wire of the same kind or with a flat U-shaped or C-shaped interlocking strip.
  • the strip is in the form of a flat U with single or internally bent-over interlocking flanges.
  • FIG. 1 is a perspective view of a pipe of the rough-bore type to which the invention applies.
  • FIGS. 2 to 8 show seven variant embodiments of armor strip profiles that can be used for the pipe of FIG. 1.
  • the pipe 1 of axis 2 comprises, from the inside outward, a carcass 3 made of an interlocked metal strip, a polymeric internal sealing sheath 4 , a metal vault 5 consisting of the winding of at least one profiled metal wire (here, a self-interlockable zeta wire) wound in a helix with a short pitch, an assembly able to resist the axial tension in the longitudinal direction of the pipe and consisting of a pair of crossed armor plies 7 , 8 wound in opposite directions with a long pitch, and a polymeric external sealing sheath 9 .
  • profiled metal wire here, a self-interlockable zeta wire
  • a hoop layer consisting of a winding with a short pitch of a rectangular wire on top of the pressure vault, other pairs of armor plies, and intermediate sheaths and/or tapings placed between these various layers.
  • the armor plies 7 and 8 are made of a strip 10 , shown here in the form of a flat strip but more advantageously bent or preformed so as to form an interlockable strip.
  • FIGS. 2 to 8 illustrate various interlockable shapes of the strip 10 .
  • the strip 10 is a flat T-shaped or W-shaped strip having a central bend 11 and two upturned flanges 12 that allow interlocking with an identical, reverse-wound strip.
  • the height of the flanges 12 is approximately equal to or less than half the height of the bend 11 .
  • the strip 10 is also in the form of a T or W, the interlocking being achieved by a flat U-shaped fastener strip 13 .
  • the strip in FIG. 4 is similar to that in FIG. 3, with two intermediate bends 11 ′ instead of a single central bend 11 .
  • the strip 10 is in the form of a flat U whose flanges 12 allow interlocking with an identical, reverse-wound strip, as in FIG. 1.
  • the strip 10 is S-shaped with two portions of loops 14 and 15 that can fit together, one in the other, to achieve self-locking.
  • the armor tendon made of strip 10 is in the form of a flat C whose flanges 12 ′ are bent over inward, so as to reduce the gap between the interlocked strips. This makes it possible to limit any creep of a polymeric sheath that might be in contact with said strips, especially when the profile is very wide.
  • the profile 10 is corrugated and terminates in flanges 12 , 12 ′ lying in opposite directions so as to allow self-interlocking.
  • the corrugations or the gaps in the strip armor tendons may be filled, in order to limit creep of the plastic sheath in contact with the armor tendons, with a plastic filling, such as a plastic rod, with thermal insulation, if it is desired to improve the insulation, or with wire rods in order to add weight.
  • a plastic filling such as a plastic rod
  • thermal insulation if it is desired to improve the insulation, or with wire rods in order to add weight.
  • These corrugations may also be used for transporting secondary conductors, such as an optical fiber if it is desired to transport a signal, or a power cable for supplying a subsea installation or for active heating by the Joule effect.
  • the shapes of the corrugations will be tailored to the conductor placed in those corrugations.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Tents Or Canopies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Details Of Indoor Wiring (AREA)
  • Pipe Accessories (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
US10/312,754 2000-06-30 2001-06-01 Flexible conduit with flexible strip reinforcement Abandoned US20030102044A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/016,480 US7716803B2 (en) 2000-06-30 2004-12-17 Method for fabricating flexible pipe with armor tendons

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR00/08484 2000-06-30
FR0008484A FR2811055B1 (fr) 2000-06-30 2000-06-30 Conduite flexible a armures en feuillard

Publications (1)

Publication Number Publication Date
US20030102044A1 true US20030102044A1 (en) 2003-06-05

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US10/312,754 Abandoned US20030102044A1 (en) 2000-06-30 2001-06-01 Flexible conduit with flexible strip reinforcement
US11/016,480 Expired - Fee Related US7716803B2 (en) 2000-06-30 2004-12-17 Method for fabricating flexible pipe with armor tendons

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/016,480 Expired - Fee Related US7716803B2 (en) 2000-06-30 2004-12-17 Method for fabricating flexible pipe with armor tendons

Country Status (10)

Country Link
US (2) US20030102044A1 (fr)
EP (1) EP1299669B1 (fr)
AT (1) ATE280920T1 (fr)
AU (1) AU2001274183A1 (fr)
BR (1) BR0112053B1 (fr)
DE (1) DE60106765D1 (fr)
DK (1) DK1299669T3 (fr)
FR (1) FR2811055B1 (fr)
NO (1) NO335396B1 (fr)
WO (1) WO2002001104A1 (fr)

Cited By (17)

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Publication number Priority date Publication date Assignee Title
US20050241716A1 (en) * 2004-04-07 2005-11-03 Tibor Nagy High-pressure hose comprising several layers of reinforcing plies
WO2006042939A1 (fr) * 2004-10-21 2006-04-27 Technip France Conduite flexible stabilisee pour le transport des hydrocarbures
US20090301594A1 (en) * 2006-02-24 2009-12-10 Dirk Raudies Pipe fitting
US20140076451A1 (en) * 2011-03-29 2014-03-20 Antoine Felix-Henry Flexible tubular underwater pipe for great depths, and method for manufacturing same
US20140158247A1 (en) * 2011-05-13 2014-06-12 National Oilwell Varco Denmark I/S Flexible unbonded pipe
US20140290784A1 (en) * 2011-05-13 2014-10-02 Deepflex Inc. Reinforcement laminate having an alignment feature
US8960239B2 (en) 2010-07-14 2015-02-24 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US9012001B2 (en) 2009-12-15 2015-04-21 National Oilwell Varco Denmark I/S Unbonded, flexible pipe
US9057465B2 (en) 2009-12-28 2015-06-16 National Oilwell Varco Denmark I/S Unbonded, flexible pipe
US9395022B2 (en) 2010-05-12 2016-07-19 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US9458956B2 (en) 2011-01-20 2016-10-04 National Oilwell Varco Denmark I/S Flexible armored pipe
US9562633B2 (en) 2009-10-28 2017-02-07 National Oilwell Varco Denmark I/S Flexible pipe and a method of producing a flexible pipe
US9587773B2 (en) 2012-03-13 2017-03-07 National Oilwell Varco Denmark I/S Unbonded flexible pipe with an optical fiber containing layer
US9796148B2 (en) 2012-04-12 2017-10-24 National Oilwell Varco Denmark I/S Method of producing an unbonded flexible pipe
EP3036467B1 (fr) 2014-02-11 2018-08-01 Technip France Conduite flexible de transport de fluide et procédé associé
US10113673B2 (en) 2012-03-13 2018-10-30 National Oilwell Varco Denmark I/S Reinforcement element for an unbonded flexible pipe
CN112066101A (zh) * 2020-08-14 2020-12-11 海洋石油工程股份有限公司 一种柔性立管及其交织型抗拉铠装层

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JP2002005347A (ja) * 2000-06-16 2002-01-09 Totaku Kogyo Kk 可撓性ホース
FR2834039B1 (fr) † 2001-12-21 2004-02-13 Inst Francais Du Petrole Conduite flexible a haute resistance a la compression axiale et sa methode de fabrication
GB2395539B (en) * 2002-11-20 2005-08-17 Coflexip Umbilical
DE602004007027D1 (de) 2003-10-31 2007-07-26 Nkt Flexibles Is Flexibles rohr mit einer durchlässigen äusseren ummantelung und herstellungsverfahren dafür
BRPI0720487B8 (pt) 2006-12-22 2020-12-01 Nat Oilwell Varco Denmark Is tubo flexível
JP5184177B2 (ja) * 2008-03-28 2013-04-17 古河電気工業株式会社 極低温流体輸送用可撓管
GB0820671D0 (en) * 2008-11-12 2008-12-17 Wellstream Int Ltd Armour reinforcement
US8910669B2 (en) 2012-02-23 2014-12-16 Ticona Llc Insert for pipe assembly and method for forming pipe assembly
CN107102410A (zh) * 2016-12-30 2017-08-29 海隆石油工业集团有限公司 一种内嵌光纤的深海立管抗拉铠装层
CN115234721B (zh) * 2022-07-13 2024-05-24 中国石油大学(北京) 一种用于复合软管的“品”型截面异型材及骨架层

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US20050241716A1 (en) * 2004-04-07 2005-11-03 Tibor Nagy High-pressure hose comprising several layers of reinforcing plies
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FR2877069A1 (fr) * 2004-10-21 2006-04-28 Technip France Sa Conduite flexible stabilisee pour le transport des hydrocarbures
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US20140158247A1 (en) * 2011-05-13 2014-06-12 National Oilwell Varco Denmark I/S Flexible unbonded pipe
US20140290784A1 (en) * 2011-05-13 2014-10-02 Deepflex Inc. Reinforcement laminate having an alignment feature
US10113673B2 (en) 2012-03-13 2018-10-30 National Oilwell Varco Denmark I/S Reinforcement element for an unbonded flexible pipe
US9587773B2 (en) 2012-03-13 2017-03-07 National Oilwell Varco Denmark I/S Unbonded flexible pipe with an optical fiber containing layer
US9796148B2 (en) 2012-04-12 2017-10-24 National Oilwell Varco Denmark I/S Method of producing an unbonded flexible pipe
EP3036467B1 (fr) 2014-02-11 2018-08-01 Technip France Conduite flexible de transport de fluide et procédé associé
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DK1299669T3 (da) 2005-02-14
FR2811055A1 (fr) 2002-01-04
BR0112053B1 (pt) 2010-12-14
BR0112053A (pt) 2003-06-17
DE60106765D1 (de) 2004-12-02
NO20026069L (no) 2003-02-12
ATE280920T1 (de) 2004-11-15
US7716803B2 (en) 2010-05-18
EP1299669B1 (fr) 2004-10-27
US20050097720A1 (en) 2005-05-12
EP1299669A1 (fr) 2003-04-09
FR2811055B1 (fr) 2003-05-16
NO20026069D0 (no) 2002-12-18
AU2001274183A1 (en) 2002-01-08
NO335396B1 (no) 2014-12-08

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