EP0034800A1 - Prospecting cable - Google Patents

Prospecting cable Download PDF

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Publication number
EP0034800A1
EP0034800A1 EP81101150A EP81101150A EP0034800A1 EP 0034800 A1 EP0034800 A1 EP 0034800A1 EP 81101150 A EP81101150 A EP 81101150A EP 81101150 A EP81101150 A EP 81101150A EP 0034800 A1 EP0034800 A1 EP 0034800A1
Authority
EP
European Patent Office
Prior art keywords
conductor
high temperatures
cable
resistant
cable according
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
EP81101150A
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German (de)
French (fr)
Other versions
EP0034800B1 (en
Inventor
Jean Marmignon
Luc Lebouc
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
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 Cables de Lyon SA filed Critical Cables de Lyon SA
Publication of EP0034800A1 publication Critical patent/EP0034800A1/en
Application granted granted Critical
Publication of EP0034800B1 publication Critical patent/EP0034800B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1891—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor comprising auxiliary conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/1821—Co-axial cables with at least one wire-wound conductor
    • 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
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat

Definitions

  • the cables for prospecting in particular for underwater petroleum prospecting, must resist ambient pressure, transmit energy for the control of devices placed on the bottom, and convey to the surface information coming from measuring devices. They must have excellent tensile strength and burst strength, as well as high temperatures, and remain insensitive to the action of hydrocarbons, which cause the swelling of many elastomers constituting the sheaths of conventional cables.
  • Cables of this kind have already been proposed, comprising bundles of conductors insulated from one another, a flexible envelope around these bundles and an external armor formed by two layers of steel wires wound helically in opposite directions.
  • Such cables do not make it possible to transmit high frequency bands, and therefore ensure the transmission only of a limited quantity of information, unless they are made of large diameter, which leads to a high price and difficulties of pose.
  • the present invention aims to remedy the above drawbacks, and to provide a cable for prospecting simultaneously ensuring the transmission of energy and a lot of information, while being of a relatively small diameter, inexpensive and laying easy.
  • the cable according to the invention is characterized in that its axial rod forms an insulator for a conductor with a function different from that of bare conductors.
  • the figure shows the cable in section. It comprises axially a rod 1 made of a thermostable polymer, such as polypropylene, polyethylene fluoride and propylene, in particular that sold by the company of Pont de Nemours under the commercial designation FEP, or in poly-methylpentene, in particular that sold under the trade designation TPX by the company Imperial Chemical Industries, depending on the temperature of use, the FEP polymer suitable for the highest temperatures.
  • a thermostable polymer such as polypropylene, polyethylene fluoride and propylene, in particular that sold by the company of Pont de Nemours under the commercial designation FEP, or in poly-methylpentene, in particular that sold under the trade designation TPX by the company Imperial Chemical Industries, depending on the temperature of use, the FEP polymer suitable for the highest temperatures.
  • Other polymers such as aromatic polyamides, in particular "Keviar" sold by the company du Pont de Nemours, may also be suitable.
  • the rod 1 constitutes the insulator of a conductor 2, used to establish a potential reference at each end of the cable, in particular for ground resistivity measurements.
  • the rod 1 is surrounded by several bare tinned or silver copper wires 3, not insulated, forming the inner conductor of the coaxial cable. These wires are themselves embedded in the insulator 4 resistant to high temperatures, in the same material as the rod 1.
  • the outer conductor 5 formed by a strip of tinned or silvered bare copper of which the two edges overlap and are welded or glued to each other.
  • the outer conductor 5 is surrounded by a sheath 6 of thermoplastic material resistant to high temperature, for example poly-methylpentene, polyethylene propylene fluoride or polyimide. This is protected by a weave of steel wires with high mechanical resistance, formed by two layers 7, 8 of wires wound helically with great pitch and in the opposite direction.
  • thermoplastic material resistant to high temperature for example poly-methylpentene, polyethylene propylene fluoride or polyimide.
  • This armor ensures the tensile strength and the burst strength of the cable, resists corrosion by sea water and prevents swelling of the sheath under the effect of hydrocarbons.
  • This cable allows it to transmit high frequency bands, and therefore to carry a greater amount of information than known cables, with equal diameter.
  • an external sheath can be added around the armor, which protects the armor from corrosion.
  • the cable of the invention can be particularly applied to prospecting for petroleum or natural gas, but is generally suitable for all research at the bottom of boreholes made on land, at the bottom of the sea and at the bottom of lakes.

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Câble pour prospection, comprenant une âme de fils conducteurs (3) entourés d'un isolant (4), et une armure (7,8) formée d'au moins une couche de fils d'acier enroulés hélicoidalement. Il comprend de son axe vers sa périphérie à l'intérieur de l'armure un jonc axial (1) en polymère résistant à des températures élevées, formant isolant pour un conducteur intérieur (2), un conducteur extérieur (5), et une gaine (6) en matériau thermoplastique résistant aux températures élevées.Cable for prospecting, comprising a core of conductive wires (3) surrounded by an insulator (4), and a weave (7,8) formed from at least one layer of helically wound steel wires. It comprises from its axis towards its periphery inside the armor an axial rod (1) made of polymer resistant to high temperatures, forming insulation for an internal conductor (2), an external conductor (5), and a sheath (6) made of thermoplastic material resistant to high temperatures.

Description

La présente invention concerne un câble pour prospection, comprenant de son axe vers sa périphérie,

  • a) un jonc axial en polymère résistant à des températures élevées,
  • b) plusieurs conducteurs nus,
  • c) un isolant électrique résistant à des températures élevées, et entourant les conducteurs nus,
  • d) un conducteur extérieur,
  • e) une gaine en matériau thermoplastique résistant à des températures élevées.
  • f) une armure formée d'au moins une couche de fils d'acier enroulés hélicoidalement.
The present invention relates to a prospecting cable, comprising from its axis to its periphery,
  • a) an axial rod made of polymer resistant to high temperatures,
  • b) several naked drivers,
  • c) an electrical insulator resistant to high temperatures, and surrounding the bare conductors,
  • d) an external conductor,
  • e) a sheath of thermoplastic material resistant to high temperatures.
  • f) an armor formed from at least one layer of helically wound steel wires.

Les câbles pour prospection, notamment pour prospection pétrolière sous-marine, doivent résister à la pression ambiante, transmettre de l'énergie pour la commande d'appareils disposés sur le fond, et véhiculer vers la surface des informations provenant d'appareils de mesure. Ils doivent posséder une excellente résistance à la traction et à l'éclatement, ainsi qu'aux températures élevées, et rester insensibles à l'action des hydrocarbures, qui provoquent le gonflement de beaucoup d'élastomères constituant les gaines des câbles usuels.The cables for prospecting, in particular for underwater petroleum prospecting, must resist ambient pressure, transmit energy for the control of devices placed on the bottom, and convey to the surface information coming from measuring devices. They must have excellent tensile strength and burst strength, as well as high temperatures, and remain insensitive to the action of hydrocarbons, which cause the swelling of many elastomers constituting the sheaths of conventional cables.

On a déjà proposé des câbles de ce genre, comportant des faisceaux de conducteurs isolés les uns des autres, une enveloppe souple autour de ces faisceaux et une armure externe formée de deux couches de fils d'acier enroulés hélicoidalement dans des sens opposés. De tels câbles ne permettent pas de transmettre des bandes de fréquences élevées, et n'assurent donc la transmission que d'une quantité limitée d'informations, à moins de les faire de gros diamètre, ce qui entraîne un prix élevé et des difficultés de pose.Cables of this kind have already been proposed, comprising bundles of conductors insulated from one another, a flexible envelope around these bundles and an external armor formed by two layers of steel wires wound helically in opposite directions. Such cables do not make it possible to transmit high frequency bands, and therefore ensure the transmission only of a limited quantity of information, unless they are made of large diameter, which leads to a high price and difficulties of pose.

La présente invention a pour but de remédier aux inconvénients ci-dessus, et de procurer un câble pour prospection assurant simultanément la transmission d'énergie et de nombreuses informations, tout en étant d'un diamètre relativement faible, peu coûteux et d'une pose facile.The present invention aims to remedy the above drawbacks, and to provide a cable for prospecting simultaneously ensuring the transmission of energy and a lot of information, while being of a relatively small diameter, inexpensive and laying easy.

Le câble selon l'invention est caractérisé en ce que son jonc axial forme isolant pour un conducteur de fonction différente de celles des conducteurs nus.The cable according to the invention is characterized in that its axial rod forms an insulator for a conductor with a function different from that of bare conductors.

Il répond en outre de préférence à au moins l'une des caractéristiques suivantes :

  • - le conducteur isolé par le jonc axial est un conducteur formant référence de potentiel,
  • - son jonc axial et son isolant électrique sont en poly-méthylpentène, en polyfluorure d'éthylène et de propylène ou en polypropylène.
  • - sa gaine est en poly-méthylpentène, en polyfluorure d'éthylène et de propylène ou en polyimide.
It also preferably meets at least one of the following characteristics:
  • the conductor isolated by the axial rod is a conductor forming a potential reference,
  • - its axial rod and its electrical insulator are made of poly-methylpentene, polyethylene fluoride and propylene or polypropylene.
  • - its sheath is made of poly-methylpentene, polyethylene fluoride and propylene or polyimide.

Il est décrit ci-après, à titre d'exemple et en référence à la figure unique du dessin annexé, un câble coaxial selon l'invention.It is described below, by way of example and with reference to the single figure of the accompanying drawing, a coaxial cable according to the invention.

La figure représente le câble en coupe. Il comporte axialement un jonc 1 en un polymère thermostable, tel que du polypropylène, du polyfluorure d'éthylène et de propylène, notamment celui vendu par la société du Pont de Nemours sous la désignation commerciale FEP, ou en poly-méthylpentène, notamment celui vendu sous la désignation commerciale TPX par la société Impérial Chemical Industries, suivant la température d'utilisation, le polymère FEP convenant pour les températures les plus élevées. D'autres polymères, tels que les polyamides aromatiques, notamment le "Keviar" commercialisé par la société du Pont de Nemours, peuvent aussi convenir.The figure shows the cable in section. It comprises axially a rod 1 made of a thermostable polymer, such as polypropylene, polyethylene fluoride and propylene, in particular that sold by the company of Pont de Nemours under the commercial designation FEP, or in poly-methylpentene, in particular that sold under the trade designation TPX by the company Imperial Chemical Industries, depending on the temperature of use, the FEP polymer suitable for the highest temperatures. Other polymers, such as aromatic polyamides, in particular "Keviar" sold by the company du Pont de Nemours, may also be suitable.

Le jonc 1 constitue l'isolant d'un conducteur 2, servant à l'établissement d'une référence de potentiel à chaque extrémité du câble, notamment pour les mesures de résistivité du sol.The rod 1 constitutes the insulator of a conductor 2, used to establish a potential reference at each end of the cable, in particular for ground resistivity measurements.

Le jonc 1 est entouré de plusieurs fils de cuivre nu étamé ou argenté 3, non isolés, formant le conducteur intérieur du câble coaxial. Ces fils sont eux-mêmes noyés dans l'isolant 4 résistant aux températures élevées, en le même matériau que le jonc 1. Autour de l'isolant 4 est enroulé le conducteur extérieur 5, formé par un feuillard de cuivre nu étamé ou argenté dont les deux bords viennent à recouvrement et sont soudés ou collés l'un à l'autre.The rod 1 is surrounded by several bare tinned or silver copper wires 3, not insulated, forming the inner conductor of the coaxial cable. These wires are themselves embedded in the insulator 4 resistant to high temperatures, in the same material as the rod 1. Around the insulator 4 is wound the outer conductor 5, formed by a strip of tinned or silvered bare copper of which the two edges overlap and are welded or glued to each other.

Le conducteur extérieur 5 est entouré d'une gaine 6 en matériau thermoplastique résistant à haute température, par exemple en poly-méthylpentène, en polyfluorure d'éthylène et de propylène ou en polyimide. Celle-ci est protégée par une armure de fils d'acier à haute résistance mécanique, formée de deux couches 7, 8 de fils enroulés hélicoldalement à grand pas et en sens inverse.The outer conductor 5 is surrounded by a sheath 6 of thermoplastic material resistant to high temperature, for example poly-methylpentene, polyethylene propylene fluoride or polyimide. This is protected by a weave of steel wires with high mechanical resistance, formed by two layers 7, 8 of wires wound helically with great pitch and in the opposite direction.

Cette armure assure la résistance à la traction et la résistance à l'éclatement du câble, résiste à la corrosion par l'eau de mer et empêche un gonflement de la gaine sous l'effet des hydrocarbures.This armor ensures the tensile strength and the burst strength of the cable, resists corrosion by sea water and prevents swelling of the sheath under the effect of hydrocarbons.

La structure coaxiale de ce câble lui permet de transmettre des bandes de fréquence élevées, et par suite de véhiculer une plus grande quantité d'information que les câbles connus, à égalité de diamètre.The coaxial structure of this cable allows it to transmit high frequency bands, and therefore to carry a greater amount of information than known cables, with equal diameter.

Si la surface du câble n'est pas soumise à des contraintes mécaniques très sévères, on peut ajouter autour de l'armure une gaine externe, qui protège l'armure de la corrosion.If the cable surface is not subjected to very severe mechanical stresses, an external sheath can be added around the armor, which protects the armor from corrosion.

Le câble de l'invention peut être particulièrement appliqué à la prospection de pétrole ou de gaz naturel, mais convient de manière générale pour toutes recherches au fond de forages réalisés à terre, au fond de la mer et au fond des lacs.The cable of the invention can be particularly applied to prospecting for petroleum or natural gas, but is generally suitable for all research at the bottom of boreholes made on land, at the bottom of the sea and at the bottom of lakes.

Claims (5)

1/ Câble coaxial pour prospection, comprenant de son axe vers sa périphérie, a).un jonc axial (1) en polymère résistant à des températures élevées, b) plusieurs conducteurs nus (3), c) un isolant électrique (4) résistant à des températures élevées, d) un conducteur extérieur (5), e) une gaine en matériau thermoplastique résistant à des températures élevées (6). f) une armure (7, 8) formée d'au moins une couche de fils d'acier enroulés hélicoidalement, caractérisé en ce que son jonc axial (1) forme isolant pour un conducteur (2) de fonction différente de celle des conducteurs nus (3). 1 / Coaxial cable for prospecting, comprising from its axis to its periphery, a) .an axial rod (1) made of polymer resistant to high temperatures, b) several bare conductors (3), c) an electrical insulator (4) resistant to high temperatures, d) an external conductor (5), e) a sheath of thermoplastic material resistant to high temperatures (6). f) an armor (7, 8) formed of at least one layer of helically wound steel wires, characterized in that its axial rod (1) forms an insulator for a conductor (2) with a function different from that of the bare conductors (3). 2/ Câble selon la revendication 1, caractérisé en ce que le conducteur isolé par le jonc axial est un conducteur formant référence de potentiel.2 / cable according to claim 1, characterized in that the conductor isolated by the axial rod is a conductor forming a potential reference. 3/ Câble selon la revendication 1, caractérisé en ce que son jonc axial et ledit isolant électrique (4) sont en poly-méthylpentène, en polyfluorure d'éthylène et de propylène ou en polypropylène.3 / cable according to claim 1, characterized in that its axial ring and said electrical insulator (4) are made of poly-methylpentene, polyethylene propylene fluoride or polypropylene. 4/ Câble selon l'une des revendications 1 à 3, caractérisé en ce que ladite gaine (6) entourant le conducteur extérieur est en poly-méthylpentène , en polyfluorure d'éthylène et de propylène, ou en polyimide.4 / Cable according to one of claims 1 to 3, characterized in that said sheath (6) surrounding the outer conductor is made of poly-methylpentene, polyethylene propylene fluoride, or polyimide. 5/ Câble selon l'une des revendications 1 à 4, caractérisé en ce que son conducteur extérieur est constitué par un feuillard de cuivre étamé ou argenté dont les deux bords viennent à recouvrement.5 / cable according to one of claims 1 to 4, characterized in that its outer conductor is constituted by a strip of tinned or silver copper, the two edges of which overlap.
EP81101150A 1980-02-25 1981-02-18 Prospecting cable Expired EP0034800B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8004053A FR2476897A1 (en) 1980-02-25 1980-02-25 CABLE FOR PROSPECTION
FR8004053 1980-02-25

Publications (2)

Publication Number Publication Date
EP0034800A1 true EP0034800A1 (en) 1981-09-02
EP0034800B1 EP0034800B1 (en) 1984-12-19

Family

ID=9238914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101150A Expired EP0034800B1 (en) 1980-02-25 1981-02-18 Prospecting cable

Country Status (6)

Country Link
US (1) US4378464A (en)
EP (1) EP0034800B1 (en)
JP (1) JPS56136411A (en)
CA (1) CA1167125A (en)
DE (1) DE3167771D1 (en)
FR (1) FR2476897A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576709A1 (en) * 1985-01-30 1986-08-01 Fabrication Cables Elect Cie G Electrical power cable with fire-resistant outer jacket
WO1994002948A1 (en) * 1992-07-27 1994-02-03 Motorola, Inc. Coiled coaxial cord
CN113963850A (en) * 2021-10-25 2022-01-21 湖南金缆电工科技有限责任公司 Tensile cable with special-shaped cross section

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199414U (en) * 1987-06-13 1988-12-22
US6472614B1 (en) * 2000-01-07 2002-10-29 Coflexip Dynamic umbilicals with internal steel rods
DE102006043797A1 (en) * 2006-09-19 2008-03-27 Sms Demag Ag Method for continuous casting of a metal strand
US9601237B2 (en) 2014-03-03 2017-03-21 Baker Hughes Incorporated Transmission line for wired pipe, and method
CN106782778A (en) * 2017-01-09 2017-05-31 哈尔滨龙声超声技术有限公司 A kind of power ultrasonic multiplexing of transmission cable

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028660A (en) * 1973-12-21 1977-06-07 Texaco Inc. Well logging method and means using an armored multiconductor coaxial cable

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US3286022A (en) * 1964-02-06 1966-11-15 Kerite Company Insulated x-ray cables
US3482034A (en) * 1967-03-07 1969-12-02 Rochester Ropes Inc Conductive tow cable
US3773109A (en) * 1970-10-29 1973-11-20 Kerr Mc Gee Chem Corp Electrical cable and borehole logging system
CA961940A (en) * 1972-01-31 1975-01-28 John R. Naud Hoisting rope
US3772454A (en) * 1972-11-22 1973-11-13 Steel Corp Torque balanced cable
GB1418554A (en) * 1973-07-03 1975-12-24 Wire Rope Ind Ltd Hoisting rope
CA1011834A (en) * 1975-04-18 1977-06-07 Zvi Paniri Self-supporting cable
GB1532272A (en) * 1976-01-20 1978-11-15 Standard Telephones Cables Ltd Coaxial cables
US4079190A (en) * 1977-02-03 1978-03-14 International Standard Electric Corporation Submarine coaxial cable
GB2034958B (en) * 1978-11-21 1982-12-01 Standard Telephones Cables Ltd Multi-core power cable
US4250351A (en) * 1979-08-08 1981-02-10 The Bendix Corporation Cable construction

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US4028660A (en) * 1973-12-21 1977-06-07 Texaco Inc. Well logging method and means using an armored multiconductor coaxial cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576709A1 (en) * 1985-01-30 1986-08-01 Fabrication Cables Elect Cie G Electrical power cable with fire-resistant outer jacket
WO1994002948A1 (en) * 1992-07-27 1994-02-03 Motorola, Inc. Coiled coaxial cord
CN113963850A (en) * 2021-10-25 2022-01-21 湖南金缆电工科技有限责任公司 Tensile cable with special-shaped cross section

Also Published As

Publication number Publication date
US4378464A (en) 1983-03-29
FR2476897A1 (en) 1981-08-28
CA1167125A (en) 1984-05-08
JPS56136411A (en) 1981-10-24
FR2476897B1 (en) 1983-11-25
EP0034800B1 (en) 1984-12-19
DE3167771D1 (en) 1985-01-31

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