US3800066A - Gas blocked logging cable - Google Patents

Gas blocked logging cable Download PDF

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Publication number
US3800066A
US3800066A US00302159A US30215972A US3800066A US 3800066 A US3800066 A US 3800066A US 00302159 A US00302159 A US 00302159A US 30215972 A US30215972 A US 30215972A US 3800066 A US3800066 A US 3800066A
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United States
Prior art keywords
cable
conductor
strands
center conductor
conductors
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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.)
Expired - Lifetime
Application number
US00302159A
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English (en)
Inventor
W Whitfill
Nerney R Mc
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Schlumberger Technology Corp
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Schlumberger Technology Corp
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Publication date
Application filed by Schlumberger Technology Corp filed Critical Schlumberger Technology Corp
Priority to US00302159A priority Critical patent/US3800066A/en
Priority to US05/369,665 priority patent/US4005168A/en
Priority to FR7338419A priority patent/FR2204852B1/fr
Priority to GB5017373A priority patent/GB1441149A/en
Application granted granted Critical
Publication of US3800066A publication Critical patent/US3800066A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up

Definitions

  • FIG. 3A FEP.
  • MONOFILA MENT 1 GAS BLOCKED LOGGING CABLE This invention relates to methods and apparatus for forming electrical cable cores, particularly well logging cable cores that are gas blocked for use in logging well bores containing gas-cut muds.
  • a standard multi-conductor well logging cable has a core comprised of six outer conductors cabled around a single center conductor and embedded in a neoprene matrix.
  • the outer conductors are usually formed by copper wire strands twisted around a single center strand, whereas typically the inner conductor has strands twisted around a plastic monofilament.
  • each conductor is covered with a layer of suitable insulation material.
  • the neoprene matrix fills substantially all the voids between conductors within the cable core, particularly where the cable is manufactured according to the teachings of US. Pat. No. 3,106,815, assigned to the assignee of this invention, voids still may exist within the conductors themselves between and about the strands.
  • a multi-conductor cable construction wherein the center conductor has strands twisted around a plastic monofilament.
  • the conductor is heated under tension to cause the strands to embed in the monofilament.
  • the outer interstices between strands are filled to eliminate voids by compression extrusion of a thermoplastic resin, and then a final coating of insulation material is applied over the filled conductor.
  • the outer conductors are solid wires that are cabled around the filled center conductor and embedded within a neoprene matrix.
  • the combination of the solid outer conductors and a completely filled inner conductor provides a resultant cable construction that contains substantially no voids whatever within which gas can collect, and not containing the voids necessary for collection of permeated gas is not subject to rupture and failure upon withdrawal from the well.
  • FIG. 1 is a perspective view of a well logging cable with successive components broken away to illustrate details of the cable construction
  • FIG. 2 is an enlarged cross-sectional view of the center conductor of the cable to illustrate the configuration of the various components after being formed in accordance with the present invention.
  • FIGS. 3A-3C are somewhat schematic view of apparatus for foming the cable illustrated in FIGS. 1 and 2.
  • a cable 9 formed in accordance with the present invention as illustrated in FIG. 1 has a central, axial conductor 10 that includes wires stranded around a plastic monofilament and encased in an insulation material to be more fully described herebelow.
  • the conductor 10 is centrally embedded in a core matrix member 11. Spirally wound about the member 11 are outer, insulated, solid copper wire conductors 12, the spiraled conductors 12 being completely encased by additional embedding material 13 that joins with the matrix material 11 to provide a monolithic sheathing 14 having a generally cylindrical outer surface.
  • Both the core matrix member 11 and the embedding material 13 preferably are formed of an extrudable, semi-conductive, oil and gas resistant elastomer that cures to a hard flexible, relatively incompressible form and maintains its physical properties at borehole temperature and pressures.
  • an extrudable, semi-conductive, oil and gas resistant elastomer that cures to a hard flexible, relatively incompressible form and maintains its physical properties at borehole temperature and pressures.
  • the acrylonitrile butadiene rubber known commercially by the trade name l-lycar is well adapted for this purpose.
  • the spiraled conductors 12 are firmly and uniformly supported and separated from each other and from the axial conductor 10 by the sheathing material.
  • Oppositely spiraled armor wires 15 and 16 are received over the sheathing 14 to provide mechanical protection and strength to adapt the composite cable for use in well logging operations.
  • the cross-section of the axially disposed conductor 10 is shown in enlarged detail in FIG. 2, and is constituted by a plurality, for example, six copper wire strands 20 around a center thermoplastic monofilament 21.
  • the monofilament 21 is a fluorocarbon polymer such as FEP Teflon, a registered trade name of DuPont.
  • the inner interstices 22 of the conductor 10 are filled in a particular manner by the simultaneous application of heat and tension causing the wire strands to embed in the monofilament 21 as will be explained more fully herebelow.
  • the outer interstices 23 are filled by compression extrusion of a thermoplastic resin material 24 that does not degrade at temperatures at least up to about 450 F, and which has acceptable flow properties at normal processable temperatures, for example about 625 F, so as to be capable of filling the external interstices of the strands.
  • a thermoplastic resin material 24 that does not degrade at temperatures at least up to about 450 F, and which has acceptable flow properties at normal processable temperatures, for example about 625 F, so as to be capable of filling the external interstices of the strands.
  • a copolymer sold under the trade name TEF- ZEL by DuPont is sold under the trade name TEF- ZEL by DuPont.
  • insulation material 25 is applied by extrusion and is also a fluorocarbon polymer, preferably FEP Teflon.
  • the conductor wire strands 20 as shown are thus embedded in a monolithic body having substantially no void spaces or pockets into which gas that would permeate the insulation materials under high temperature and pressure
  • FIGS. 3A-C Apparatus for forming the cable 9 is shown schematically in FIGS. 3A-C.
  • a typical high speed tubular strander contains supply spools 31 for the copper wire strands 20 and a supply spool 32 for the plastic monofilament 21.
  • the strands 20 feed to the outside of the tube 33 as it rotates, and at the forward end of the tube pass through a closing die 34 where they are formed a round the monofilament 21. From here the conductor passes to a capstan assembly 35 and then to a storage reel 36. At this point, the monofilament 21 has a tubular form with the wires 20 stranded therearound in typical configuration.
  • the stranded conductor 10 is paid off of a reel as shown in FIG. 3B and is passed through a constant tension device 41, that may be, for example a combination of a capstan and pulleys that incorporate either a mechanical brake or an electrical device such as a typical hysteresis brake. In any event the result is to place the conductor 10 under a substantially constant tension of predetermined magnitude.
  • a constant tension device 41 may be, for example a combination of a capstan and pulleys that incorporate either a mechanical brake or an electrical device such as a typical hysteresis brake.
  • the conductor Under tension, the conductor is passed through a heater 42 that applies sufficient heat to soften the monofilament 21 so that radial inward forces on the strands 20 due to tension cause them to imbed in the outer periphery of the monofilament and to attain the cross-section configuration shown in FIG. 2.
  • the conductor 10 passes through an extruder 43 with a compression extrusion set-up where the thermoplastic filler material 24 is applied to completely fill the external interstices as shown in FIG. 2, whereupon the filled conductor passes through a second extruder 44 having a tubing extrusion set-up.
  • the insulation material 25 is applied around the strands 20 and the filler material 24.
  • the conductor 10 feeds through a capstan assembly 45 that preferably is driven by a constant speed motor and together with the constant tension device 41 dictates a carefully controlled tension for the conductor as it passes through the elements 412, 43 and 44. Finally, of course, the conductor is wound up on a storage reel 46.
  • the complete core of the cable 9 is formed by supplying the filled axial conductor 10 from a spool where it is subjected to an extruding device 51 that applies the uncured, semiconductive core material thereto to form the matrix member 11 with a generally cylindrical form.
  • the member 11 is then fed through a closing die represented at 52.
  • Into the die are also fed the insulated solid copper conductors 12 that are supplied from spools 53 mounted in a well known manner upon a rotatable frame.
  • the frame and closing die 52 rotate about a common axis and the conductors 12 are embedded in the core member 11 in passing through the closing die.
  • the core member 11 is then fed through a second extruding device 54 where the uncured outer sheathing material 13 is applied under pressure to cause the matrix material to extrude about the outer parts of the spiraled conductors 12 and to merge with the inner core member 11.
  • the assembly is subjected to curing action in an oven 55 which forms the sheathing into a monolithic body that firmly embeds the conductors therein again, with substantially no void spaces.
  • the inner and outer armor wires 15 and 16 are applied by known means (not shown) and the finished cable is stored upon a reel or spool 56.
  • the strands 20 may be six 27 AWG (0.0142 inch O.D.) bright copper wire stranded around the thermoplastic monofilament 21 having a diameter of 0.016 inches.
  • This conductor is coated with a 0.005 inch wall thickness of the filler material 24 using minimum extruder screw speed and adjusting the wire speed to maintain the desired finished diameter of 0.053 inch.
  • the heater current is set at 25 amps and the wire tension at 15 pounds. These parameters dictate a line speed of about fpm using a 2 inch, 20:1, length to diameter ratio, plasticating ex truder with a temperature profile and extruder materials as recommended by the supplier of the thermoplastic resin 24.
  • the assembly is coated with 0.010 inch wall thickness of the insulation material 25.
  • the complete cable 9 having the filled axial conductor 10 and the solid outer conductors 12 disposed in a monolithic body of matrix material 14 provides a well logging cable containing substantially no voids within which gas can collect, so that the cable is not subject to rupture and failure upon withdrawal from the well.
  • a gas blocked well logging cable comprising: a cable core including a plurality of solid insulated conductors cabled around a stranded center conductor, said center conductor having a plurality of wire strands twisted around a plastic monofilament and at least partially embedded therein to eliminate internal voids between strands, a thermoplastic filler material filling the external voids between strands, and an insulation material extruded over said center conductor, said outer conductors and said center conductor being disposed in a void-free matrix forming material.
  • the well logging cable of claim 1 further including an inner and an outer layer of armor wires cabled about said core.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Ropes Or Cables (AREA)
  • Insulated Conductors (AREA)
US00302159A 1972-10-30 1972-10-30 Gas blocked logging cable Expired - Lifetime US3800066A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00302159A US3800066A (en) 1972-10-30 1972-10-30 Gas blocked logging cable
US05/369,665 US4005168A (en) 1972-10-30 1973-06-13 Method for making a gas blocked logging cable
FR7338419A FR2204852B1 (enrdf_load_stackoverflow) 1972-10-30 1973-10-29
GB5017373A GB1441149A (en) 1972-10-30 1973-10-29 Gas blocked logging cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00302159A US3800066A (en) 1972-10-30 1972-10-30 Gas blocked logging cable

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/369,665 Division US4005168A (en) 1972-10-30 1973-06-13 Method for making a gas blocked logging cable

Publications (1)

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US3800066A true US3800066A (en) 1974-03-26

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US00302159A Expired - Lifetime US3800066A (en) 1972-10-30 1972-10-30 Gas blocked logging cable

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US (1) US3800066A (enrdf_load_stackoverflow)
FR (1) FR2204852B1 (enrdf_load_stackoverflow)
GB (1) GB1441149A (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080543A (en) * 1973-11-21 1978-03-21 Hitachi, Ltd. Winding assembly of gap winding type electric rotary machines
US4250351A (en) * 1979-08-08 1981-02-10 The Bendix Corporation Cable construction
US4342500A (en) * 1979-08-10 1982-08-03 Siemens Aktiengesellschaft High voltage stabile optical cable structures
US4552432A (en) * 1983-04-21 1985-11-12 Cooper Industries, Inc. Hybrid cable
US5086196A (en) * 1990-08-09 1992-02-04 Camco, Incorporated Electro-mechanical cable for cable deployed pumping systems
US5150443A (en) * 1990-08-14 1992-09-22 Schlumberger Techonolgy Corporation Cable for data transmission and method for manufacturing the same
US5894104A (en) * 1997-05-15 1999-04-13 Schlumberger Technology Corporation Coax-slickline cable for use in well logging
GB2367681A (en) * 1997-05-20 2002-04-10 Shaw Ind Ltd Twin conductor electrical cable
AU772021B2 (en) * 2000-10-05 2004-04-08 Sercel Inc. Twin-axial electrical cable
US20110011617A1 (en) * 2008-01-11 2011-01-20 Walid El-Fityani Flat power cable
CN102602083A (zh) * 2012-03-20 2012-07-25 浙江顺天复合材料有限公司 一种纤维增强复合材料芯及其制备方法
US9024189B2 (en) 2011-06-24 2015-05-05 Schlumberger Technology Corporation Cable construction
US20160137146A1 (en) * 2013-08-26 2016-05-19 Yazaki Corporation Shielded wire and wire harness
US9691523B2 (en) 2014-05-30 2017-06-27 Wireco Worldgroup Inc. Jacketed torque balanced electromechanical cable
US20170309371A1 (en) * 2016-04-25 2017-10-26 Leoni Kabel Gmbh Multifunctional cable
US9837187B2 (en) 2011-10-14 2017-12-05 Te Wire & Cable Llc Gas blocking cable and method of manufacturing
US10354780B2 (en) 2011-10-14 2019-07-16 Te Wire & Cable Llc Gas blocking cable and method of manufacturing
US20200118713A1 (en) * 2018-10-11 2020-04-16 Aptiv Technologies Limited Automotive communications cable
CN115083686A (zh) * 2022-07-19 2022-09-20 安徽华上电缆科技有限公司 一种抗拉散热型新能源汽车用电缆
US12014847B2 (en) 2021-12-03 2024-06-18 Aptiv Technologies AG Cable for connecting system components

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO158039C (no) * 1985-03-01 1988-06-29 Standard Tel Kabelfab As Borehulls-loggekabel.
AU8288887A (en) * 1987-06-22 1988-12-22 W.L. Gore & Associates, Inc. Controlled electrical performance miniature multi-conductor cable

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463590A (en) * 1946-10-25 1949-03-08 Arutunoff Armais Weight-carrying cable
US2576227A (en) * 1949-12-10 1951-11-27 Simplex Wire & Cable Co Nonmetallic armored electrical submarine cable
US2604509A (en) * 1948-04-06 1952-07-22 Schlumberger Well Surv Corp Nonspinning armored electric cable
US2929863A (en) * 1956-10-17 1960-03-22 United States Steel Corp Insulated oil well cable
US2981788A (en) * 1958-12-03 1961-04-25 Anaconda Wire & Cable Co Power cables
US3106815A (en) * 1962-05-07 1963-10-15 Vector Cable Company Apparatus and method for forming stranded cables
US3153696A (en) * 1956-03-12 1964-10-20 Schlumberger Well Surv Corp Methods for processing cables
US3236939A (en) * 1962-02-14 1966-02-22 Gen Cable Corp Stranded electric cable with vulcanized strand sealing composition
US3259675A (en) * 1960-12-29 1966-07-05 Schlumberger Well Surv Corp Methods for manufacturing armored cables
US3324233A (en) * 1965-04-08 1967-06-06 Amphenol Corp Cable complex employing strand twist reversal to absorb longitudinal expansion
US3576388A (en) * 1968-12-05 1971-04-27 Stauffer Wacker Silicone Corp Electrical cable
US3584139A (en) * 1968-12-27 1971-06-08 Bell Telephone Labor Inc Torque-balanced communications cable
US3681514A (en) * 1970-03-30 1972-08-01 Rochester Corp The Electrical cable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR489605A (fr) * 1917-04-03 1919-02-25 Charles James Beaver Perfectionnements aux cables électriques à plusieurs conducteurs et à leur fabrication
BE524999A (enrdf_load_stackoverflow) * 1952-12-30
FR1353462A (fr) * 1961-12-29 1964-02-28 Schlumberger Well Surv Corp Câble armé et son procédé de fabrication
US3589121A (en) * 1969-08-01 1971-06-29 Gen Electric Method of making fluid-blocked stranded conductor

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463590A (en) * 1946-10-25 1949-03-08 Arutunoff Armais Weight-carrying cable
US2604509A (en) * 1948-04-06 1952-07-22 Schlumberger Well Surv Corp Nonspinning armored electric cable
US2576227A (en) * 1949-12-10 1951-11-27 Simplex Wire & Cable Co Nonmetallic armored electrical submarine cable
US3153696A (en) * 1956-03-12 1964-10-20 Schlumberger Well Surv Corp Methods for processing cables
US2929863A (en) * 1956-10-17 1960-03-22 United States Steel Corp Insulated oil well cable
US2981788A (en) * 1958-12-03 1961-04-25 Anaconda Wire & Cable Co Power cables
US3259675A (en) * 1960-12-29 1966-07-05 Schlumberger Well Surv Corp Methods for manufacturing armored cables
US3236939A (en) * 1962-02-14 1966-02-22 Gen Cable Corp Stranded electric cable with vulcanized strand sealing composition
US3106815A (en) * 1962-05-07 1963-10-15 Vector Cable Company Apparatus and method for forming stranded cables
US3324233A (en) * 1965-04-08 1967-06-06 Amphenol Corp Cable complex employing strand twist reversal to absorb longitudinal expansion
US3576388A (en) * 1968-12-05 1971-04-27 Stauffer Wacker Silicone Corp Electrical cable
US3584139A (en) * 1968-12-27 1971-06-08 Bell Telephone Labor Inc Torque-balanced communications cable
US3681514A (en) * 1970-03-30 1972-08-01 Rochester Corp The Electrical cable

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080543A (en) * 1973-11-21 1978-03-21 Hitachi, Ltd. Winding assembly of gap winding type electric rotary machines
US4250351A (en) * 1979-08-08 1981-02-10 The Bendix Corporation Cable construction
US4342500A (en) * 1979-08-10 1982-08-03 Siemens Aktiengesellschaft High voltage stabile optical cable structures
US4552432A (en) * 1983-04-21 1985-11-12 Cooper Industries, Inc. Hybrid cable
US5086196A (en) * 1990-08-09 1992-02-04 Camco, Incorporated Electro-mechanical cable for cable deployed pumping systems
US5150443A (en) * 1990-08-14 1992-09-22 Schlumberger Techonolgy Corporation Cable for data transmission and method for manufacturing the same
US5894104A (en) * 1997-05-15 1999-04-13 Schlumberger Technology Corporation Coax-slickline cable for use in well logging
GB2367681A (en) * 1997-05-20 2002-04-10 Shaw Ind Ltd Twin conductor electrical cable
GB2367681B (en) * 1997-05-20 2004-04-21 Shaw Ind Ltd Twin-axial electrical cable
AU772021B2 (en) * 2000-10-05 2004-04-08 Sercel Inc. Twin-axial electrical cable
US8487186B2 (en) 2008-01-11 2013-07-16 Prysmian S.P.A. Flat power cable
US20110011617A1 (en) * 2008-01-11 2011-01-20 Walid El-Fityani Flat power cable
US9024189B2 (en) 2011-06-24 2015-05-05 Schlumberger Technology Corporation Cable construction
US10796822B2 (en) 2011-10-14 2020-10-06 Te Wire & Cable Llc Method for making a gas blocking cable
US10354780B2 (en) 2011-10-14 2019-07-16 Te Wire & Cable Llc Gas blocking cable and method of manufacturing
US9837187B2 (en) 2011-10-14 2017-12-05 Te Wire & Cable Llc Gas blocking cable and method of manufacturing
CN102602083A (zh) * 2012-03-20 2012-07-25 浙江顺天复合材料有限公司 一种纤维增强复合材料芯及其制备方法
CN102602083B (zh) * 2012-03-20 2014-10-22 浙江顺天复合材料有限公司 一种纤维增强复合材料芯及其制备方法
US20160137146A1 (en) * 2013-08-26 2016-05-19 Yazaki Corporation Shielded wire and wire harness
US10262771B2 (en) 2014-05-30 2019-04-16 Wireco Worldgroup Inc. Method for manufacturing a torque balanced electromechanical cable
US9691523B2 (en) 2014-05-30 2017-06-27 Wireco Worldgroup Inc. Jacketed torque balanced electromechanical cable
US10074460B2 (en) * 2016-04-25 2018-09-11 Leoni Kabel Gmbh Multifunctional cable
US20170309371A1 (en) * 2016-04-25 2017-10-26 Leoni Kabel Gmbh Multifunctional cable
US20200118713A1 (en) * 2018-10-11 2020-04-16 Aptiv Technologies Limited Automotive communications cable
US12014847B2 (en) 2021-12-03 2024-06-18 Aptiv Technologies AG Cable for connecting system components
CN115083686A (zh) * 2022-07-19 2022-09-20 安徽华上电缆科技有限公司 一种抗拉散热型新能源汽车用电缆

Also Published As

Publication number Publication date
FR2204852B1 (enrdf_load_stackoverflow) 1976-06-18
GB1441149A (en) 1976-06-30
FR2204852A1 (enrdf_load_stackoverflow) 1974-05-24

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