GB2403995A - Temperature controlled pipe with electrically conductive layer - Google Patents

Temperature controlled pipe with electrically conductive layer Download PDF

Info

Publication number
GB2403995A
GB2403995A GB0415461A GB0415461A GB2403995A GB 2403995 A GB2403995 A GB 2403995A GB 0415461 A GB0415461 A GB 0415461A GB 0415461 A GB0415461 A GB 0415461A GB 2403995 A GB2403995 A GB 2403995A
Authority
GB
United Kingdom
Prior art keywords
pipe
layer
tubular
tubular member
nanotubes
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.)
Granted
Application number
GB0415461A
Other versions
GB2403995A8 (en
GB0415461D0 (en
GB2403995B (en
Inventor
John Robert Belcher
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.)
Wellstream International Ltd
Original Assignee
Wellstream International 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 Wellstream International Ltd filed Critical Wellstream International Ltd
Publication of GB0415461D0 publication Critical patent/GB0415461D0/en
Publication of GB2403995A publication Critical patent/GB2403995A/en
Publication of GB2403995A8 publication Critical patent/GB2403995A8/en
Application granted granted Critical
Publication of GB2403995B publication Critical patent/GB2403995B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30Heating of pipes or pipe systems
    • F16L53/35Ohmic-resistance heating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00Hoses, i.e. flexible pipes
    • F16L11/04Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00Details of electric heating devices
    • H05B1/02Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227Applications
    • H05B1/023Industrial applications
    • H05B1/0244Heating of fluids
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021Heaters specially adapted for heating liquids
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2214/00Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
    • H05B2214/04Heating means manufactured by using nanotechnology

Abstract

A pipe 10 for conveying fluids, the pipe comprising a tubular member 16 formed of a plastics material and a plurality of electrically conductive materials dispersed in the plastics material for increasing the electrical conductivity of the tubular layer. Preferably an electrical power source 22 is connected to the ends of the tubular member via an electrical conductor 24, so that when electrical power is supplied from the source the current flows through the conductive materials to heat the pipe. The conducting materials may be carbon nanotubes having a length to diameter ratio greater than 800. The nanotubes may be single walled or have multiple walls. The tubular layer may surround or be surrounded by a tubular plastics layer, and/or a tubular armour layer. The tubular layer preferably surrounds a tubular carcass layer 12. Also claimed is a method of manufacturing such a pipe.

Description

TEMPERATURE CONTROLLED PIPE
AND METHOD OF MANUFACTURING SAME
Background
1] The present invention relates to a temperature controlled pipe and a method of manufacturing same, and, more particularly to a pipe that can be heated.
[00021 When crude oil, gas, or other similar fluids are transported through pipes and/or risers in subsea environments, several challenges are presented with respect to designing the pipes and risers for transporting the fluids. For example, the pipes and risers must provide a fluid barrier while being resistant to collapse and penetration yet must be flexible and connectable to other equipment. Also, the temperature of the fluid flowing within the pipe often must be maintained above a minimum value to insure that the conveyed fluid flows freely. For example, when the conveyed fluid is primarily methane, moisture present in the gas can form methane hydrate when the pressure is sufficient and the temperature is not sufficiently high. These hydrates build locally and tend to clog the pipe. Also, when the conveyed fluid is crude oil with an excessive amount of wax dissolved in the oil, wax can build up on the walls of the pipe, which leads to a decreased flow in the pipe and associated oil production.
3] Therefore, several attempts have been made to heat flexible pipes, such as by wrapping an electric heater wire around the pipe or embedding such a wire in a layer of the pipe. However, these arrangements are less than optimum since, in general, the compositions of the various layers of pipe are not good conductors of the heat or electrical current.
4] The embodiments of the present invention overcome these deficiencies.
Brief Description of the Drawing
5] Fig. 1 is a partial elevational-partial sectional view of a pipe according to an embodiment of the invention.
6] Fig. 2 is a view, similar to that of Fig. 1, but depicting an alternate embodiment of the pipe of the present invention.
Detailed Description
7] Referring to the drawing, a pipe 10 is formed by an inner tubular layer 12, preferably in the form of a metallic carcass fabricated from a range of corrosion resistant stainless steel alloys depending on the fluid to be conveyed.
Although the carcass can take many forms, an example would be one or more interlocking members as manufactured by the assignee of the present invention, and marketed under the trademark FLEXBODY.
8] A tubular insulating layer 14 extends around, or surrounds, the layer 12 with the inner surface of the former being in intimate contact with the outer surface of the latter. Although the layer 14 can take several forms, an example is a layer fabricated from a plastic material, such as a polymer, so as to be chemically resistant to the fluid being conveyed. Examples of the latter material are high-density polyethylene, nylon, and polyvinylidene fluoride. An example of the layer 14 is manufactured by the assignee of the present invention and marketed under the trademark FLEXBARRIER and is well disclosed in assignee's product literature and internet web site, which are hereby incorporated by reference.
9] A layer 16 extends around, or surrounds, the layer 14 with the inner surface of the former being in intimate contact with the outer surface of the latter.
The layer 16 is used as a fluid sealing layer, and, as such, can be fabricated from one of several materials, one of which would be a polymer, and, in fact, the layer can be identical to the layer 14.
0] A plurality of electrically conductive, carbon materials, preferably in the form of nanotubes, is dispersed in the polymer forming the layer 16. This is achieved by controlled dispersion of specifically designed, highly electrically conductive, carbon nanotubes into the supporting polymer matrix during fabrication of the layer 16. The nanotubes can either have a single wall or multiple walls and are fullerenes (a convex cage of atoms with only hexagonal and/or pentagonal faces) with a diameter of approximately 1.2-1.4 nm for a single wall nanotube and somewhat larger diameter for multi-wall nanotube. The nanotube structure may vary with respect to the chiral angle (or helicity) of the arrangement of hexagonal shapes. With the proper angle, the nanotubes have a relatively high electrical conductively, substantially equal to that of copper, when compared to the polymer forming the layer 16, but with a comparatively much lower density. The nanotubes have a length-to-diameter ratio ranging from 800 to 10,000. Since the percolation (onset of conductivity) threshold for these materials is less than one half of one percent by volume, this relatively high ratio results in a much lower required filler content to achieve percolation than traditional metal filled systems. In other words, the density of the nanotubes in the layer 16 is less than the density of metal that would have to be dispersed in the layer to achieve the same electrical conductivity. As a result the pipe 10 is much lighter when compared with metal filled polymer layers.
[00111 The layer 16 is connected in an electrical circuit 20 including a power source 22 and an electrical conductor 24. Although not shown in the drawings, it is understood that the conductor 24 extends through the layer 16 or is wrapped around the latter layer. Application of electrical power, in the form of alternating current or direct current, from the source 22 to the circuit 20 causes the current to pass through the conductor 24 and heat the layer 16. Due to the high thermal conductively of the above-mentioned nanotubes, the pipe 10 is heated to relatively high temperatures by the electrical energy from the source 22. It is understood that the amount of electrical power flowing through the conductor 24 and the layer 16 can be varied to control the temperature of the pipe 10 and the fluid conveyed by the pipe.
2] An outer layer 18, in the form of a sheath, extends around, or surrounds, the layer 16 with the inner surface of the former being in intimate contact with the outer surface of the latter. The layer 18 can take several forms, and an example would be a layer fabricated from a plastic material, such as a polymer, and, in fact, the layer can be identical to the layer 16.
3] Although not shown in the drawing, it is understood that an armor layer can be wrapped around the any one of the layers 12, 14, and 16 to add strength to the pipe 10. This armor layer would be designed to provide resistance to internal and external pressure in the hoop direction, and can take several forms. For example, the armor layer could be formed by circumferentially winding one or more wires, having a circular or rectangular cross-section and formed of carbon steel, around the layer 12, 14, and/or 16, with adjacent windings being interlocked, to form an armor layer. An example of the armor layer is manufactured by the assignee of the present invention and marketed under the trademark FLEXLOK.
[00141 An additional armor layer can also be provide in addition to, or in place of, the above armor layer, and it could be formed by winding multiple wires around one or more of the layers 12, 14, and 16 at a relatively long pitch to provide resistance to internal pressure in the axial direction. The wires can have a circular or rectangular crosssection, can be formed of carbon steel, and can be applied in overlapping layers in alternating helix directions. An example of this layer is manufactured by the assignee of the present invention and marketed under the trademark FLEXLOK.
5] The embodiment of Fig. 2 is identical to that of Fig. 1 with the exception that the layer 12 of the embodiment of Fig. 1 has been omitted. Since the structure of the embodiment of Fig. 2 is described above, it will not be described again.
6] As a result of the above, in both of the above embodiments the fluid being conveyed can be maintained at relatively high temperatures to avoid the problems set forth above.
[00171 It should be emphasized that, in the either of the above embodiments, a thermal insulating layer may be applied outside the layer 16, or outside the layer 18, to reduce the amount of power required to heat the pipe to a desired temperature.
Variations [0018] 1. The composition of each of the layers disclosed above can be varied within the scope of the invention.
9] 2. Although the conductor 24 is shown in the drawings as extending between the ends of a relatively short section of the pipe 10, it can also be connected between the ends of relatively long lengths of pipe to heat the pipe, and the fluid being conveyed, in the above manner.
10020] 3. One or more of the layers discussed above can be eliminated and, in fact the pipe can consist of only one layer.
10021] 4. One or more of the layers discussed above can be replaced by another layer of a different design.
2] 5. Two or more of the layers discussed above can be provided.
3] 6. Additional layers of a different design, such as the armor layers discussed above, and/or tape layers, can be wound over the layers 12, 14 and/or 16.
4] 7. The relative thicknesses of the layers discussed above are shown in the drawing only for the purpose of example, it being understood that these relative thicknesses can be varied within the scope of the invention.
5] 8. The relative radial positions of the layers discussed above can be changed.
6] 9. The adjacent windings of the strip forming the layer 12 do not have to be interlocked.
7] 10. The invention is not limited to use with a flexible pipe but is equally applicable to other pipes such as reinforced thermoplastic pipes and composite pipes.
8] 11. The spatial references, such as "under", "over", "between", "outer", "inner", "around", and "surrounding" are for the purpose of illustration only and do not limit the specific orientation or location of the layers described above.
9] Although only a few exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many other modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention.
Accordingly, all such modifications are intended to be included within the scope of the following claims. À

Claims (40)

  1. Claims 1. A pipe for conveying fluids, the pipe comprising a tubular
    member formed of a plastic material, and a plurality of electrical current conductive materials dispersed in the plastic material for increasing the electrical conductivity of the tubular layer.
  2. 2, The pipe of claim 1 further comprising an electrical conductor connected to two portions of the tubular layer so that when electrical power is supplied to the conductor, the current flows through the materials to heat the pipe and the fluids.
  3. 3. The pipe of claim 2 wherein the electrical conductor is connected to the respective ends of the tubular member.
  4. 4. The pipe of claim 1 wherein the electrical conductivity of the materials is greater than that of the plastic material.
  5. 5. The pipe of claim 1 further comprising an electrical power source connected to the electrical conductor, and wherein the amount of electrical power flowing from the power source, and through the conductor and the layer can be varied to control the temperature of the fluid.
  6. 6. The pipe of claim 1 wherein the materials are carbon.
  7. 7. The pipe of claim 1 wherein the materials are carbon nanotubes.
  8. 8. The pipe of claim 1 wherein the nanotubes are a convex cage of atoms with only hexagonal and/or pentagonal faces.
  9. 9. The pipe of claim 7 wherein each nanotube has a single wall with a diameter in the range of 1.2-1.4.
  10. 10. The pipe of claim 7 wherein each nanotube has multiple walls.
  11. 11. The pipe of claim 7 wherein the nanotubes have a length-to- diameter ratio that is greater than 800.
  12. 12. The pipe of claim 7 wherein the density of the nanotubes in the layer is less than the density of metal that would have to be dispersed in the layer to achieve the same electrical conductivity.
  13. 13. The pipe of claim 7 wherein the percolation threshold for the nanotubes is less than one half of one percent by volume.
  14. 14. The pipe of claim 7 wherein the density of the nanotubes in the layer less than the density of metal that would have to be dispersed in the layer to achieve the same electrical conductivity.
  15. 15. The pipe of claim 1 further comprising a tubular plastic layer, which is surrounded by the tubular member.
  16. 16. The pipe of claim 1 further comprising a tubular plastic layer surrounding the tubular member.
  17. 17. The pipe of claim 1 further comprising a tubular armor layer, which is surrounded by the tubular member.
  18. 18. The pipe of claim 1 further comprising a tubular armor layer surrounding the tubular member.
  19. 19. The pipe of claim 1 further comprising a tubular carcass layer which is surrounded by the tubular member.
  20. 20. The pipe of claim 19 further comprising a plastic tubular layer extending between the tubular member and the carcass layer.
  21. 21. A method of manufacturing a pipe for conveying fluids, the method comprising forming the pipe, at least in part, with a tubular member formed of a plastic material, and dispersing a plurality of electrical current conductive materials in the plastic material for increasing the electrical conductivity of the tubular layer.
  22. 22. The method of claim 21 further comprising connecting an electrical conductor connected so that when electrical power is supplied to the conductor, the current flows through the materials to heat the pipe and the fluids.
  23. 23. The method of claim 22 further comprising connecting the electrical conductor to the respective ends of the tubular member.
  24. 24. The method of claim 21 wherein the electrical conductivity of the materials is greater than that of the plastic material.
  25. 25. The method of claim 21 further comprising connecting an electrical power source to the electrical conductor, and varying the amount of electrical power flowing from the power source, and through the conductor and the layer to control the temperature of the fluid.
  26. 26. The method of claim 21 wherein the materials are carbon.
  27. 27. The method of claim 21 wherein the materials are carbon nanotubes.
  28. 28. The method of claim 27 wherein the nanotubes are a convex cage of atoms with only hexagonal and/or pentagonal faces.
  29. 29. The pipe of claim 27 wherein each nanotube has a single wall with a diameter in the range of 1.2-1.4.
  30. 30. The pipe of claim 27 wherein each nanotube has multiple walls.
  31. 31. The method of claim 27 wherein the nanotubes have a length-todiameter ratio that is greater than 800.
  32. 32. The method of claim 27 wherein the density of the nanotubes in the layer is less than the density of metal that would have to be dispersed in the layer to achieve the same electrical conductivity.
  33. 33. The method of claim 27 wherein the percolation threshold for the nanotubes is less than two percent by volume.
  34. 34. The method of claim 27 wherein the density of the nanotubes in the layer is less than the density of metal that would have to be dispersed in the layer to achieve the same electrical conductivity.
  35. 35. The method of claim 21 further comprising providing a tubular plastic layer, which is surrounded by the tubular member.
  36. 36. The method of claim 21 further comprising surrounding the tubular member with a tubular plastic layer surrounding the tubular member.
  37. 37. The method of claim 21 further providing a tubular armor layer, which is surrounded by the tubular member.
  38. 38. The method of claim 21 further comprising surrounding the tubular member with a tubular armor layer.
  39. 39. The method of claim 21 further comprising providing a tubular carcass layer, which is surrounded by the tubular member.
  40. 40. The method of claim 39 further comprising providing a plastic tubular layer between the tubular member and the carcass layer.
GB0415461A 2003-07-16 2004-07-09 Temperature controlled pipe and method of manufacturing same Expired - Fee Related GB2403995B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/620,826 US7123826B2 (en) 2003-07-16 2003-07-16 Temperature controlled pipe and method of manufacturing same

Publications (4)

Publication Number Publication Date
GB0415461D0 GB0415461D0 (en) 2004-08-11
GB2403995A true GB2403995A (en) 2005-01-19
GB2403995A8 GB2403995A8 (en) 2006-07-05
GB2403995B GB2403995B (en) 2006-12-13

Family

ID=32869810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0415461A Expired - Fee Related GB2403995B (en) 2003-07-16 2004-07-09 Temperature controlled pipe and method of manufacturing same

Country Status (4)

Country Link
US (1) US7123826B2 (en)
AU (1) AU2004203060B2 (en)
BR (1) BRPI0402774B1 (en)
GB (1) GB2403995B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20090847A1 (en) * 2009-05-15 2010-11-16 Colbachini Spa FLEXIBLE TUBE OF A PERFECT TYPE FOR THE TRANSPORT OF FLUID MATERIALS AND ELECTRIC CURRENT.
GB2476515A (en) * 2009-12-24 2011-06-29 Spencor Ronald Charles Manester Composite flexible pipeline
US20140023116A1 (en) * 2009-08-26 2014-01-23 Ut-Battelle Llc Carbon nanotube temperature and pressure sensors
WO2015086954A1 (en) * 2013-12-12 2015-06-18 Total Sa Composite strip, and methods for forming a junction between two conduits
WO2015086955A1 (en) * 2013-12-12 2015-06-18 Total Sa Method for forming an electrical connection
GB2548096A (en) * 2016-03-07 2017-09-13 Empig As Cooling system
US10743372B2 (en) 2013-12-12 2020-08-11 Total Sa Electric heating device

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413061C (en) * 2004-06-07 2008-08-20 鸿富锦精密工业(深圳)有限公司 Thermal tube and producing method thereof
CN100529637C (en) * 2004-09-01 2009-08-19 鸿富锦精密工业(深圳)有限公司 Heat pipe and its manufacturing method
CN100383962C (en) * 2004-09-08 2008-04-23 鸿富锦精密工业(深圳)有限公司 Hot pipe and production thereof
US7360461B2 (en) * 2004-09-23 2008-04-22 Aircuity, Inc. Air monitoring system having tubing with an electrically conductive inner surface for transporting air samples
JP4489558B2 (en) * 2004-10-25 2010-06-23 三桜工業株式会社 Multi-layer resin tube
US7946629B2 (en) * 2005-10-07 2011-05-24 Flexpipe Systems Inc. Pipe coupling and method for installation
US8205512B1 (en) * 2007-08-16 2012-06-26 Airogistic, L.L.P Systems and methods for collection and detection of particulates in the air
US8559800B2 (en) * 2009-02-13 2013-10-15 The Gates Corporation Heated fluid conduit end covers, systems and methods
CN101999063B (en) * 2009-05-04 2013-01-02 Lg电子株式会社 Air conditioner
WO2010128694A1 (en) * 2009-05-04 2010-11-11 엘지전자 주식회사 Refrigerant heating device and manufacturing method thereof
FR2956183B1 (en) 2010-02-09 2012-03-16 Technip France UNDERWATER FLEXIBLE DRIVEN COMPRISING A LAYER COMPRISING A POLYMER RESIN COMPRISING SURFACE-MODIFIED TITANIUM NANOPARTICLES
DK2410223T3 (en) * 2010-07-21 2013-08-26 Nexans Conduit for transporting a medium under water
FR2967774B1 (en) * 2010-11-24 2013-08-30 Nanomade Concept MINIATURIZED PRESSURE SENSOR
FR3006032B1 (en) * 2013-05-21 2016-12-16 Technip France FLEXIBLE TUBULAR DRIVER HEATED BY PASSING AN ELECTRIC CURRENT WITHIN CARBON COMPOSITE ARMS
AU2014299014B2 (en) 2013-08-02 2019-01-17 National Oilwell Varco Denmark I/S An unbonded flexible pipe and an offshore system comprising an unbonded flexible pipe
GB2525609B (en) 2014-04-28 2017-04-19 Acergy France SAS Riser system with gas-lift facility
JP6554298B2 (en) * 2015-03-17 2019-07-31 東拓工業株式会社 Flexible hose
AU2016305125B2 (en) * 2015-08-10 2021-03-11 National Oilwell Varco Denmark I/S An unbonded flexible pipe
US10396500B2 (en) 2016-08-31 2019-08-27 Norma U.S. Holding Llc Electrically conductive conduit assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1562435A (en) * 1975-10-06 1980-03-12 Moore & Co Samuel Electrically conductive hose
GB1572800A (en) * 1976-02-19 1980-08-06 Boc Ltd Method and apparatus for breaking down deposits on the walls of a vessel containing a potentially explosive gas mixtture
US6090459A (en) * 1995-03-01 2000-07-18 Huels Aktiengesellschaft Multilayer plastic composition having an electrically conductive inner layer
EP1054036A1 (en) * 1999-05-18 2000-11-22 Fina Research S.A. Reinforced polymers
FR2840848A1 (en) * 2002-06-13 2003-12-19 Inst Francais Du Petrole Multi-layer material with controlled permeability has outer polymer layer with mineral filler to adsorb and trap hydrocarbons
EP1449885A1 (en) * 2003-02-18 2004-08-25 Atofina Compositions based on polyamides and polyolefins containing carbon nanotubes

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133321U (en) * 1976-04-06 1977-10-11
US4429213A (en) * 1978-10-20 1984-01-31 Dayco Corporation Electrically heated fluid conduit
JPH0369887A (en) * 1989-08-07 1991-03-26 Usui Internatl Ind Co Ltd Resin-made composite tube
US5713864A (en) * 1995-04-11 1998-02-03 Sims Level 1, Inc. Integral conductive polymer resistance heated tubing
US5862303A (en) * 1996-05-17 1999-01-19 Advanced Metal Technologies, Ltd. Electrically heated pipe with helically wound amorphous alloy heater
US5730188A (en) * 1996-10-11 1998-03-24 Wellstream, Inc. Flexible conduit
US6426134B1 (en) * 1998-06-30 2002-07-30 E. I. Du Pont De Nemours And Company Single-wall carbon nanotube-polymer composites
US6039083A (en) * 1998-10-13 2000-03-21 Wellstream, Inc. Vented, layered-wall deepwater conduit and method
US6280697B1 (en) * 1999-03-01 2001-08-28 The University Of North Carolina-Chapel Hill Nanotube-based high energy material and method
US6363974B1 (en) * 1999-11-05 2002-04-02 Wellstream, Inc. Flexible pipe and method of manufacturing same
US6446672B1 (en) * 1999-11-05 2002-09-10 Wellstream, Inc. Flexible pipe including vent passage and method of manufacturing same
US6317540B1 (en) * 2000-02-02 2001-11-13 Pirelli Cables & Systems, Llc Energy cable with electrochemical chemical analyte sensor
US6519835B1 (en) * 2000-08-18 2003-02-18 Watlow Polymer Technologies Method of formable thermoplastic laminate heated element assembly
US7037459B2 (en) * 2001-03-12 2006-05-02 General Cable Technologies Corporation Methods of making compositions comprising thermoplastic and curable polymers and articles made from such methods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1562435A (en) * 1975-10-06 1980-03-12 Moore & Co Samuel Electrically conductive hose
GB1572800A (en) * 1976-02-19 1980-08-06 Boc Ltd Method and apparatus for breaking down deposits on the walls of a vessel containing a potentially explosive gas mixtture
US6090459A (en) * 1995-03-01 2000-07-18 Huels Aktiengesellschaft Multilayer plastic composition having an electrically conductive inner layer
EP1054036A1 (en) * 1999-05-18 2000-11-22 Fina Research S.A. Reinforced polymers
FR2840848A1 (en) * 2002-06-13 2003-12-19 Inst Francais Du Petrole Multi-layer material with controlled permeability has outer polymer layer with mineral filler to adsorb and trap hydrocarbons
EP1449885A1 (en) * 2003-02-18 2004-08-25 Atofina Compositions based on polyamides and polyolefins containing carbon nanotubes

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251192A1 (en) * 2009-05-15 2010-11-17 IVG Colbachini S.p.A. An improved flexible hose for conveying fluid materials and electric current
ITMI20090847A1 (en) * 2009-05-15 2010-11-16 Colbachini Spa FLEXIBLE TUBE OF A PERFECT TYPE FOR THE TRANSPORT OF FLUID MATERIALS AND ELECTRIC CURRENT.
US9476785B2 (en) 2009-08-26 2016-10-25 Ut-Battelle, Llc Carbon nanotube temperature and pressure sensors
US20140023116A1 (en) * 2009-08-26 2014-01-23 Ut-Battelle Llc Carbon nanotube temperature and pressure sensors
US9759622B2 (en) * 2009-08-26 2017-09-12 Ut-Battelle, Llc Carbon nanotube temperature and pressure sensors
US9518885B2 (en) 2009-08-26 2016-12-13 Ut-Battelle, Llc Carbon nanotube temperature and pressure sensors
US9494478B2 (en) 2009-08-26 2016-11-15 Ut-Battelle, Llc Carbon nanotube temperature and pressure sensors
GB2476515A (en) * 2009-12-24 2011-06-29 Spencor Ronald Charles Manester Composite flexible pipeline
WO2015086954A1 (en) * 2013-12-12 2015-06-18 Total Sa Composite strip, and methods for forming a junction between two conduits
FR3015171A1 (en) * 2013-12-12 2015-06-19 Total Sa METHOD FOR FORMING AN ELECTRICAL CONNECTION
FR3014737A1 (en) * 2013-12-12 2015-06-19 Total Sa COMPOSITE STRIP AND METHODS FOR FORMING JOINT BETWEEN TWO PIPES
WO2015086955A1 (en) * 2013-12-12 2015-06-18 Total Sa Method for forming an electrical connection
US10283925B2 (en) 2013-12-12 2019-05-07 Total Sa Method for forming an electrical connection
US10743372B2 (en) 2013-12-12 2020-08-11 Total Sa Electric heating device
US10907754B2 (en) 2013-12-12 2021-02-02 Total Sa Composite strip, and methods for forming a junction between two conduits
GB2548096A (en) * 2016-03-07 2017-09-13 Empig As Cooling system
GB2548096B (en) * 2016-03-07 2018-08-29 Empig As Cooling system

Also Published As

Publication number Publication date
BRPI0402774A (en) 2005-05-24
GB2403995A8 (en) 2006-07-05
AU2004203060A1 (en) 2005-02-03
US20050011572A1 (en) 2005-01-20
GB0415461D0 (en) 2004-08-11
AU2004203060B2 (en) 2009-12-24
GB2403995B (en) 2006-12-13
US7123826B2 (en) 2006-10-17
BRPI0402774B1 (en) 2015-06-23

Similar Documents

Publication Publication Date Title
US7123826B2 (en) Temperature controlled pipe and method of manufacturing same
US8450667B2 (en) Flexible, electrically heatable hose
JP2595160B2 (en) Flexible tubular conduit with built-in heating means
EP3334970B1 (en) An unbonded flexible pipe
US20110226754A1 (en) Heating Cable
US10470251B2 (en) Voltage-leveling monolithic self-regulating heater cable
US20190208582A1 (en) Voltage-Leveling Heater Cable
CN104169625A (en) Bushings, sealing devices, tubing, and methods of installing tubing
JPH067509B2 (en) Electric heater
US20130192708A1 (en) Energy dissipative tubes and methods of fabricating and installing the same
US20110233192A1 (en) Skin effect heating system having improved heat transfer and wire support characteristics
CN105792396B (en) Heating cable, heating unit and method based on skin effect
EP2251192B1 (en) An improved flexible hose for conveying fluid materials and electric current
MXPA02007435A (en) Energy superconducting cable with improved superconducting core.
US6701969B2 (en) Flexible tubular pipe and method of manufacturing same
US6671162B1 (en) Hose with conductive fiber
JP7214644B2 (en) Carbon nanotube composite wires, carbon nanotube coated wires, wire harnesses, wiring for robots and overhead wires for trains
JP7195712B2 (en) Carbon nanotube coated wire
JP7254708B2 (en) Carbon nanotube composite wire, carbon nanotube coated wire and wire harness
JP6567628B2 (en) Carbon nanotube coated wire
EP0924711A2 (en) Multiconductor electrical cable
WO2022256083A1 (en) Heater hose with multi-voltage functionality and constant power output
JP7166977B2 (en) coated wire
WO2013112213A1 (en) Energy dissipative tubes and methods of fabricating and installing the same
JP2019175855A (en) Carbon nanotube coated wire

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20141106 AND 20141112

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210709