FR2472823A1 - Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments - Google Patents

Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments Download PDF

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Publication number
FR2472823A1
FR2472823A1 FR7931980A FR7931980A FR2472823A1 FR 2472823 A1 FR2472823 A1 FR 2472823A1 FR 7931980 A FR7931980 A FR 7931980A FR 7931980 A FR7931980 A FR 7931980A FR 2472823 A1 FR2472823 A1 FR 2472823A1
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France
Prior art keywords
insulation
multicore cable
methyl
pressure
heat
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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
FR7931980A
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French (fr)
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FR2472823B1 (en
Inventor
Jean Marmignon
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.)
Cables de Lyon SA
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Cables de Lyon SA
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Filing date
Publication date
Application filed by Cables de Lyon SA filed Critical Cables de Lyon SA
Priority to FR7931980A priority Critical patent/FR2472823A1/en
Publication of FR2472823A1 publication Critical patent/FR2472823A1/en
Application granted granted Critical
Publication of FR2472823B1 publication Critical patent/FR2472823B1/fr
Granted 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
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)

Abstract

Insulation for a multicore cable is made from polymers or copolymers of a methyl pentene, for a combination of resistance to elevated temperatures (greater than 150 deg.C) and hydrocarbons, e.g. for power, signal or instrumentation cables for petroleum exploration. The insulation is pref. to ethylene-propylene copolymer insulation, for heat resistance, rubber insulation, for use in pressurised enviroments, or polyfluorocarbon insulation, for lower cost. Patent describes a multicore cable with armoured (steel wire) sheathing, where the insulation and coaxial spacer for each of the series of six strand cables is made from a methylpentene polymer. Opt. the insulation is coated with a semi-conductor material, e.g. a carbon-based suspension.

Description

L'invention est relative à un câble électrique dont les éléments isolants sont soumis à des contraintes physico-chimiques particulièrement sévères comme celles rencontrées avec les câbles utilises en matière de prospection pétrolière. The invention relates to an electric cable, the insulating elements of which are subjected to particularly severe physicochemical constraints such as those encountered with cables used in the field of petroleum prospecting.

Dans les équipements de prospection pétrolière, on se sert de câbles électriques de transport d'énergie, de commande et de transmission d'informations. Les éléments d'isolation de tels câbles, qui sont enfouis dans les puits de forage, doivent supporter des efforts mécaniques très importants dans des conditions de température et de pression très élevées et, ceci, en présence du milieu agressif offert par des hydrocarbures. In oil prospecting equipment, electrical cables are used for energy transport, control and information transmission. The insulation elements of such cables, which are buried in the boreholes, must withstand very high mechanical stresses under very high temperature and pressure conditions, and this, in the presence of the aggressive medium offered by hydrocarbons.

Les câbles actuellement utilisés dans les puits de prospection pétrolière comportent généralement une isolation réalisée soit en copolymère d'éthylène-propylène, soit en élastomère vulcanisé, soit encore en résine fluorocarbonée. L'isolation en copolymère d'éthylènepropylène ne permet pas supporter une température supérieure à 1500C et ne résiste guère à l'altération des hydrocarbures présents dans les forages. Les isolations en élastomère n'autorisent qu'une faible résistance à l'éclatement des jonctions lors de la remontée des câbles qui travaillent dans des puits contenant du gaz sous pression. Quant aux résines fluocarbonées, si elles offrent un comportement relativement satisfaisant, elles sont d'un prix de revient très élevé. The cables currently used in oil prospecting wells generally include insulation made either of ethylene-propylene copolymer, or of vulcanized elastomer, or even of fluorocarbon resin. The insulation in ethylenepropylene copolymer does not allow it to withstand a temperature above 1500C and hardly resists the alteration of the hydrocarbons present in the boreholes. The elastomer insulations allow only a low resistance to bursting of the junctions during the ascent of the cables which work in wells containing gas under pressure. As for the fluocarbon resins, if they offer a relatively satisfactory behavior, they are of a very high cost price.

L'invention a pour but un câble électrique dont l'isolation présente à la fois une bonne tenue à la résistance mécanique, à la température et à l'agressivité chimique en présence d'hydrocarbures, tout en étant d'un prix de revient intéressant. The object of the invention is to provide an electric cable, the insulation of which exhibits both good resistance to mechanical resistance, temperature and chemical aggressiveness in the presence of hydrocarbons, while being of attractive cost price. .

L'invention a pour objet un câble électrique à isolant à hautes performances physico-chimiques, caractérisé en ce qu'il comporte des eléments isolants en polymère ou copolymère de méthylpentène. The subject of the invention is an electrical insulating cable with high physicochemical performance, characterized in that it comprises insulating elements made of methylpentene polymer or copolymer.

Les éléments isolants d'un tel câble peuvent ainsi être réalisés avec un copolymère de méthylpentène. Ils peuvent être enduits ou revêtus lors de l'injection d'un matériau semi-conducteur, par exemple à base de carbone ou de graphite en suspension. The insulating elements of such a cable can thus be produced with a methylpentene copolymer. They can be coated or coated during the injection of a semiconductor material, for example based on carbon or graphite in suspension.

La figure unique représente une vue schématisant une coupe transversale d'un exemple de câble électrique selon l'invention.  The single figure shows a view schematically a cross section of an example of an electric cable according to the invention.

Dans la figure, le câble est composé de sept conducteurs 1 dont six sont régulièrement répartis autour d'un conducteur central. In the figure, the cable is composed of seven conductors 1, six of which are regularly distributed around a central conductor.

Chacun de ces conducteurs 1 est composé de six fils de cuivre 2 disposés autour d'un jonc central 3 en polyméthylpentène. Chacun des conducteurs 1 ainsi constitué est enrobé dans une gaine isolante 4 en polyméthylpentène enduit d'un semi-conducteur à base de carbone ou de graphite en suspension. Un bourrage coton 5 enduit de semi-conducteur est interposé entre chacune des gaines 4 des conducteurs périphériques 1 tandis que des rubans 6 de textile également enduit d'un semi-conducteur sont disposés autour de l'ensemble. Les rubans 6 sont placés à l'intérieur d'une armure extérieure composée d'une première couche de fils d'acier 7 et d'une deuxième couche de fils d'acier 8.Each of these conductors 1 is composed of six copper wires 2 arranged around a central rod 3 made of polymethylpentene. Each of the conductors 1 thus formed is coated in an insulating sheath 4 made of polymethylpentene coated with a semiconductor based on carbon or graphite in suspension. A cotton stuffing 5 coated with semiconductor is interposed between each of the sheaths 4 of the peripheral conductors 1 while ribbons 6 of textile also coated with a semiconductor are arranged around the assembly. The ribbons 6 are placed inside an outer weave composed of a first layer of steel wires 7 and a second layer of steel wires 8.

Le polymère de méthylpentène peut être utilisé sous forme de copolymère de méthylpentène ou encore homopolymère de méthylpentène. The methylpentene polymer can be used in the form of a methylpentene copolymer or also a methylpentene homopolymer.

Il est évident que l'invention n'est nullement limitée au mode de réalisation qui vient d'être décrit et qui n'a été donné qu'à titre d'exemple.  It is obvious that the invention is in no way limited to the embodiment which has just been described and which has been given only by way of example.

Claims (4)

REVENDICATIONS 1/ Câble électrique à isolant à hautes performances physico-chimiques, caractérisé en ce qu'il comporte des éléments isolants en polymère de méthylpentène.1 / Insulating electrical cable with high physicochemical performance, characterized in that it comprises insulating elements made of methylpentene polymer. 2/ Câble électrique selon la revendication 1, caractérisé en ce que les éléments sont réalisés avec un copolymère de méthylpentène.2 / Electric cable according to claim 1, characterized in that the elements are made with a methylpentene copolymer. 3/ Câble électrique selon la revendication 1, caractérisé en ce que les éléments sont réalisés en homopolymère de pentène. 3 / Electric cable according to claim 1, characterized in that the elements are made of pentene homopolymer. 4/ Câble électrique selon la revendication 1, caractérisé en ce que les éléments isolants sont enduits d'un semi-conducteur. 4 / electrical cable according to claim 1, characterized in that the insulating elements are coated with a semiconductor.
FR7931980A 1979-12-28 1979-12-28 Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments Granted FR2472823A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7931980A FR2472823A1 (en) 1979-12-28 1979-12-28 Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7931980A FR2472823A1 (en) 1979-12-28 1979-12-28 Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments

Publications (2)

Publication Number Publication Date
FR2472823A1 true FR2472823A1 (en) 1981-07-03
FR2472823B1 FR2472823B1 (en) 1983-04-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR7931980A Granted FR2472823A1 (en) 1979-12-28 1979-12-28 Multicore cable insulation of methyl:pentene polymers - for heat, pressure and oil resistance in aggressive environments

Country Status (1)

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FR (1) FR2472823A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602780A1 (en) * 1986-08-14 1988-02-19 Vector Cables Sa Improved composition based on polymethylpentene
WO2016005791A1 (en) 2014-07-08 2016-01-14 Prysmian S.P.A. Energy cable having a thermoplastic electrically insulating layer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1515886A1 (en) * 1964-07-29 1970-02-12 Ici Ltd Remote cable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1515886A1 (en) * 1964-07-29 1970-02-12 Ici Ltd Remote cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602780A1 (en) * 1986-08-14 1988-02-19 Vector Cables Sa Improved composition based on polymethylpentene
WO2016005791A1 (en) 2014-07-08 2016-01-14 Prysmian S.P.A. Energy cable having a thermoplastic electrically insulating layer

Also Published As

Publication number Publication date
FR2472823B1 (en) 1983-04-15

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