EP0887807A1 - Câble électrique multibrin - Google Patents

Câble électrique multibrin Download PDF

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Publication number
EP0887807A1
EP0887807A1 EP98301353A EP98301353A EP0887807A1 EP 0887807 A1 EP0887807 A1 EP 0887807A1 EP 98301353 A EP98301353 A EP 98301353A EP 98301353 A EP98301353 A EP 98301353A EP 0887807 A1 EP0887807 A1 EP 0887807A1
Authority
EP
European Patent Office
Prior art keywords
fluid barrier
insulating material
surrounding
ethylene propylene
alloys
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.)
Withdrawn
Application number
EP98301353A
Other languages
German (de)
English (en)
Inventor
Grant T. Harris
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.)
Camco International Inc
Original Assignee
Camco International Inc
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 Camco International Inc filed Critical Camco International Inc
Publication of EP0887807A1 publication Critical patent/EP0887807A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration

Definitions

  • the present invention relates to multiconductor electrical cables and, more particularly, to multiconductor electrical cables for use in subterranean wellbores.
  • high temperature means temperatures of greater than about 180 F and as high as about 500 F.
  • high pressure means pressures as high as about 5,000 psi.
  • corrosive fluids means liquids and gases which can cause degradation to cable insulating materials and/or corrosion to the electrical conductors, such as liquids and/or gases containing hydrogen sulphide, carbon dioxide, brine, water, and the like.
  • Subterranean wellbore cables include several layers of different materials to either protect the copper conductors from mechanical damage and/or from damage from corrosive fluids.
  • the copper conductors are sheathed in one or more layers of insulating materials, such as ethylene propylene diene methylene terpolymer ("EPDM”), and a thin sheath of extruded lead to act as a fluid barrier.
  • EPDM ethylene propylene diene methylene terpolymer
  • a metal armour is applied over the electrical conductors.
  • a protective braid is woven around the electrical conductors.
  • the electrical conductors leave the metal extruder, where the fluid barrier is applied, they are reeled onto a spool, transported to the braiding machines, fed through the braiding machines, and then transported to the armouring machines.
  • Each of these steps greatly increases the chances for the fluid barrier to be damaged, which directly results in power cable failures.
  • the present invention is a multiconductor electrical cable for use in a subterranean wellbore that includes at least one electrical conductor surrounded by one or more layers of insulating material.
  • a fluid barrier such as an extruded layer of lead or tin alloy, surrounds the insulating material.
  • a non-braided protective material is applied as an extrusion or a tape.
  • the non-braided protective material can be applied immediately after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier during manufacturing.
  • the non-braided protective material can be applied with simple forms or wrapping machines that are less complex and less costly than the prior braiding machines.
  • Figure 1 is a cross-sectional, perspective view of one preferred embodiment of a multiconductor electrical cable of the present invention, with a longitudinal wrap of non-braided material above the fluid barrier.
  • Figure 2 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with a spiral wrap of non-braided material.
  • Figure 3 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with an extruded layer of non-braided material.
  • Figure 4 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention.
  • the present invention comprises a multiconductor electrical cable for use in a subterranean wellbore.
  • the cable includes at least one electrical conductor surrounded by one or more layers of insulating material, with a fluid barrier surrounding the insulating material.
  • a non-braided protective material is applied as an extrusion or a tape.
  • the non-braided protective material can be applied immediately after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier.
  • the power cable of the present invention can be used in many differing power transmission environments, for the purposes of the present discussion it will be assumed that the power cable is used to supply electricity to an electric submergible pumping system ("ESP").
  • ESP electric submergible pumping system
  • the ESP is set within a casing that is cemented within a subterranean wellbore that penetrates one or more subterranean earthen formations.
  • Typical ESP's comprises an elongated electric motor, an oil-filled motor protector, and a multistage pump connected to a production tubing.
  • the electrical cable extends from a surface power source downwardly within the casing and is operatively connected to the electric motor.
  • the electrical cable ofthe present invention is made to withstand relatively high temperatures, high pressures and corrosive fluids encountered within subterranean wellbores; however, it should be understood that the electrical cable of the present invention can also be used in less difficult applications, such as surface power transmission, under water uses, and the like.
  • high temperature means temperatures of greater than about 180 F and as high as about 500 F.
  • high pressure means pressures as high as about 5,000 psi.
  • corrosive fluids means liquids and gases which can cause degradation to insulating materials and/or corrosion to the electrical conductors, such as liquids and/or gases containing hydrogen sulphide, carbon dioxide, water, and the like.
  • Figure 1 shows one preferred embodiment of an electrical cable 10 of the present invention of a relatively flat configuration, with three electrical conductors 12 in parallel and side-by-side relationship.
  • the electrical conductors 12 are single drawn wires of copper or copper alloys, as shown in Figures 1-3, or from a twist of several wires, as shown in Figure 4.
  • the conductors 12 are single drawn wires having a diameter or gauge thickness of from about 0.160" (6 AWG) to about 0.414" (2/0 AWG).
  • the conductors 12 may have a relatively thin coating (not shown) of lead, tin or alloys thereof, hot dipped, heat extruded, or electroplated thereon.
  • One or more ground wires may be included, as well as other wires, conductors, conduits, fibre optics, and the like, as may be used to transmit fluids and/or information and command signals through the power cable 10.
  • At least one of the electrical conductors 12, and preferably all of the conductors 12, is sheathed in at least one layer of an insulating material 14 selected from the group consisting of ethylene propylene diene methylene, ethylene propylene rubber, polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof If a polyether insulating material is selected, then preferred materials are selected from the group consisting of polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetherketoneetherketoneketone (PEKEKK), and mixtures, blends and alloys thereof
  • the insulating material 14 is applied to the conductor 12 by spiral or longitudinal wrapping, or preferably by heat extrusion, as is well known to those skilled in the art.
  • a fluid barrier 16 is applied to the outer surface of the insulating material 14.
  • the fluid barrier 16 is preferably one or more extruded layers of a metal, such as lead, tin, and/or alloys thereof.
  • the fluid barrier 16 is fragile and very susceptible to cracking and abrasion damage during the manufacturing process. Therefore, a braid of nylon threads has been applied to protect the fluid barrier during subsequent transport and armouring process. As described previously, this braiding process is relatively expensive as compared to extruding processes, uses relatively complex machines as compared to extruding machines, and requires the insulated and sheathed conductors to be spooled onto a reel, moved to the braiding machines, spooled through the braiding machines, respooled onto a reel, and then moved to the armouring machines. All of this spooling and transport can lead to damage to the fluid barrier.
  • the prior nylon braid is eliminated and a new non-braided protective material 18 is applied in one or more layers to the fluid barrier 16 as a tape or as an extrusion.
  • the protective material 18 is selected from the group comprising fibreglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof.
  • the non-braided protective material 18 is selected to be itself semi-conductive, i.e., have a resistivity less than about 10 K ohm/meter, or include one or more threads and/or fibres of semi-conductive materials, such as carbon impregnated nylon threads or other similar material.
  • the non-braided protective material 18 can be applied to the insulated and sheathed conductors 12 as a separate process, as before with the nylon braid, or preferably as a process that is in-line and immediately adjacent to the machinery that applies the fluid barrier 16.
  • the protective material 18 can be in the form of a tape that is passed through a conical form and longitudinally wrapped around the insulated and sheathed conductor 12, as shown in Figure 1.
  • the tape of protective material 18 can be thermoplastic or thermoset, and as such a seam 20 of the protective material 18 can be sealed by the external application of heat to seal the seam. In place of the application of heat or in addition thereto, a solvent or glue can be used along the seam 20 to create a seal.
  • the fluid barrier 16 When the fluid barrier 16 is a heat extruded layer of metal, the fluid barrier 16 exits that extrusion machinery is at about 300 degrees F to about 400 degrees F.
  • the seam 20 is sealed simply by applying the tape of protective material 18 immediately thereafter so that the residual heat from the immediately prior metal extrusion will cause the seam 20 to seal.
  • the tape ofthe protective material 18 can be applied as a spiral wrap, as shown in Figure 2, and as one or more extruded layers, as shown in Figure 3.
  • the cable 10 can also include a jacket of elastomeric material 22, as shown in Figure 4, that surrounds the insulated and sheathed conductors 12.
  • This jacket 22 can be formed from tapes and/or one or more extruded layers of elastomeric material selected from the group consisting of nitrile rubber, ethylene propylene, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, polyethylene, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof
  • an outer protective armour 24 is spirally wrapped there around, as is well known to those skilled in the art.
  • the present invention provides an electrical cable that does not need a separate braiding process, with its inherent risks of damage to the fragile fluid barrier, and uses material and processes that are less expensive than the prior braided material.

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  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
EP98301353A 1997-06-24 1998-02-25 Câble électrique multibrin Withdrawn EP0887807A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US881755 1986-07-03
US88175597A 1997-06-24 1997-06-24

Publications (1)

Publication Number Publication Date
EP0887807A1 true EP0887807A1 (fr) 1998-12-30

Family

ID=25379141

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98301353A Withdrawn EP0887807A1 (fr) 1997-06-24 1998-02-25 Câble électrique multibrin

Country Status (3)

Country Link
EP (1) EP0887807A1 (fr)
CA (1) CA2241578A1 (fr)
NO (1) NO982831L (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094194A2 (fr) * 1999-10-21 2001-04-25 Camco International Inc. Tubage flexible avec cable électrique pour système de pompage de fond de puits et procédés pour la fabrication et la mise en oeuvre d'un tel système
WO2011144933A1 (fr) * 2010-05-18 2011-11-24 Tyco Electronics Uk Ltd Bande isolante à haute température et fil ou câble revêtu par celle-ci
FR2982993A1 (fr) * 2011-11-23 2013-05-24 Axon Cable Sa Cable electrique haute tension adapte aux conditions extremes
CN104485163A (zh) * 2014-12-19 2015-04-01 河北华通线缆集团有限公司 一种高温潜油泵电缆及其制造工艺
WO2016191508A1 (fr) * 2015-05-28 2016-12-01 Schlumberger Technology Corporation Bande formant barrière en alliage de plomb
US11562834B2 (en) 2017-10-03 2023-01-24 Schlumberger Technology Corporation Lead alloy barrier tape splice for downhole power cable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122954A1 (fr) * 1983-04-23 1984-10-31 Mitsubishi Cable Industries, Ltd. Bande de blindage et câbles électriques comportant une telle bande
US4626619A (en) * 1983-02-07 1986-12-02 The Furukawa Electric Co., Ltd. Water impervious rubber or plastic insulated power cable
US4780574A (en) * 1987-04-16 1988-10-25 Hubbell Incorporated Lead sheathed power cable
US5300733A (en) * 1992-11-30 1994-04-05 The Furukawa Electric Co., Ltd. Water impervious rubber or plastic insulated power cable
US5414217A (en) * 1993-09-10 1995-05-09 Baker Hughes Incorporated Hydrogen sulfide resistant ESP cable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626619A (en) * 1983-02-07 1986-12-02 The Furukawa Electric Co., Ltd. Water impervious rubber or plastic insulated power cable
EP0122954A1 (fr) * 1983-04-23 1984-10-31 Mitsubishi Cable Industries, Ltd. Bande de blindage et câbles électriques comportant une telle bande
US4780574A (en) * 1987-04-16 1988-10-25 Hubbell Incorporated Lead sheathed power cable
US5300733A (en) * 1992-11-30 1994-04-05 The Furukawa Electric Co., Ltd. Water impervious rubber or plastic insulated power cable
US5414217A (en) * 1993-09-10 1995-05-09 Baker Hughes Incorporated Hydrogen sulfide resistant ESP cable

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094194A2 (fr) * 1999-10-21 2001-04-25 Camco International Inc. Tubage flexible avec cable électrique pour système de pompage de fond de puits et procédés pour la fabrication et la mise en oeuvre d'un tel système
EP1094194A3 (fr) * 1999-10-21 2002-01-23 Camco International Inc. Tubage flexible avec cable électrique pour système de pompage de fond de puits et procédés pour la fabrication et la mise en oeuvre d'un tel système
WO2011144933A1 (fr) * 2010-05-18 2011-11-24 Tyco Electronics Uk Ltd Bande isolante à haute température et fil ou câble revêtu par celle-ci
CN102883882A (zh) * 2010-05-18 2013-01-16 泰科电子英国有限公司 高温绝缘带和用其覆套的电线或电缆
FR2982993A1 (fr) * 2011-11-23 2013-05-24 Axon Cable Sa Cable electrique haute tension adapte aux conditions extremes
WO2013076416A1 (fr) * 2011-11-23 2013-05-30 Axon Cable Cable electrique haute tension adapte aux conditions extremes
CN104485163A (zh) * 2014-12-19 2015-04-01 河北华通线缆集团有限公司 一种高温潜油泵电缆及其制造工艺
WO2016191508A1 (fr) * 2015-05-28 2016-12-01 Schlumberger Technology Corporation Bande formant barrière en alliage de plomb
US11562834B2 (en) 2017-10-03 2023-01-24 Schlumberger Technology Corporation Lead alloy barrier tape splice for downhole power cable

Also Published As

Publication number Publication date
CA2241578A1 (fr) 1998-12-24
NO982831L (no) 1998-12-28
NO982831D0 (no) 1998-06-19

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