EP1064657A1 - Cable de manipulation conducteur - Google Patents

Cable de manipulation conducteur

Info

Publication number
EP1064657A1
EP1064657A1 EP99909088A EP99909088A EP1064657A1 EP 1064657 A1 EP1064657 A1 EP 1064657A1 EP 99909088 A EP99909088 A EP 99909088A EP 99909088 A EP99909088 A EP 99909088A EP 1064657 A1 EP1064657 A1 EP 1064657A1
Authority
EP
European Patent Office
Prior art keywords
cable
layer
armour
wires
armour wires
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Withdrawn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
EP99909088A
Other languages
German (de)
English (en)
Inventor
Robert Will
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.)
Expro North Sea Ltd
Original Assignee
Expro North Sea 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 Expro North Sea Ltd filed Critical Expro North Sea Ltd
Publication of EP1064657A1 publication Critical patent/EP1064657A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/226—Helicoidally wound metal wires or tapes
    • 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
    • H01B7/046—Flexible cables, conductors, or cords, e.g. trailing cables attached to objects sunk in bore holes, e.g. well drilling means, well pumps

Definitions

  • the present invention relates to a cable, and particularly but not exclusively, to a cable for use in the deployment of services in a well bore.
  • Typical cable assemblies include electric lines and slickline cables.
  • An electric line comprises a central conductive core formed from between one and seven electrical conductors .
  • the core is surrounded by a layer of insulating material, which in turn, is surrounded by an inner layer and an outer layer of armour wires .
  • the armour wires of the inner layer are wrapped around the longitudinal axis of the cable in the opposite direction to the armour wires of the outer layer. The arrangement provides the cable with mechanical strength and helps to prevent the cable from untorquing during use .
  • Such electric lines may be used to deploy relatively large loads in wellbores and may be used to communicate with and power downhole equipment in real-time.
  • electric lines have an uneven surface which requires the use of pressure control equipment incorporating grease control flowtubes, which prevent the migration of well fluids and gases through the voids between the cable armours .
  • a further disadvantage is that the armour wires may separate with repeated use or loss of tension. In such situations, special techniques are required to allow safe recovery of the line from the well bore.
  • a slickline comprises a single strand of alloy or steel wire used for the mechanical manipulation of various equipment in a well bore.
  • the outside surface of a slickline is smooth; thus, the frictional force in raising or lowering a slickline is relatively low.
  • the complexity of pressure control equipment used to deploy slickline is considerably less than that which is necessary to deploy an electric line. Slicklines, however, cannot be used to transmit electricity and, accordingly, cannot be used to communicate electrically, and, accordingly, cannot be used to power downhole equipment .
  • a cable comprising a conductive core which is insulated from at least one layer of armour wires by an insulating layer.
  • the voids between the armour wires are filled with a resilient material to prevent well fluids from seeping into the voids between the armour wires causing damage to the cable.
  • the resilient material binds strongly to the armour wires preventing the armour wires from separating, even after repeated use or loss of tension.
  • the resilient material also provides the cable with a smooth outside surface.
  • a cable comprising: a conductive core, at least one layer of insulating material surrounding said conductive core, at least one layer of armour wires disposed around said layer of insulating material, said wires defining voids therebetween, and a resilient material disposed in said voids between said armour wires.
  • the cable of the present invention may be used for the deployment of services in a wellbore, and is suitable, for example, for communicating electrically and powering downhole tools in real time. Additionally and/or alternatively, the cable may be used to raise or lower relatively large loads in a wellbore.
  • the resilient material fills the voids between the wires so that the armour wires are bound together and are resistant to separation, even after repeated use.
  • the outside surface of the cable is relatively smooth; thus, the frictional losses involved in raising and lowering the cable are relatively low.
  • the cable has a high degree of mechanical strength and is resistant to damage by well fluids and permits deployment utilising the minimum of pressure control equipment .
  • the cable comprises an even number of armour wire layers.
  • each layer is wrapped around the longitudinal axis of the cable in an opposite direction to the layer immediately adjacent to it.
  • the cable comprises an inner layer and an outer layer of armour wires .
  • the armour wires of the inner layer are wrapped around the longitudinal axis of the cable in the opposite direction to the armour wires of the outer layer .
  • the arrangement provides the cable with mechanical strength and helps to prevent the cable from untorquing during use .
  • the conductive core may be formed of one or more electrical conductors. Any suitable metal or metal alloy wire may be used as an electrical conductor.
  • the conductive core comprises a bundle of seven copper conductors.
  • a single conductor comprising a bundle of seven #20A G, 7/,126"BCu copper strands is employed.
  • the conductive core is insulated by a layer of, for example, a plastics material.
  • Suitable plastics insulators include, for example, EPC, PVC and PTFE .
  • a layer of 0.05842cm (0.023") Wall EPC is used.
  • the armour wires may be formed from Incalloy, stainless steel or carbon steel.
  • the armour wires are formed from galvanised improved plough steel (IPS) .
  • IPS galvanised improved plough steel
  • an inner armour layer of 12/0.024" wire and an outer armour layer of 15/0.03" wire are used.
  • the voids between the armour wires are filled with any resilient material, for example, a plastics material.
  • Suitable plastics include polypropylene, TPX, Tefzel and Teflon PTFE. Most preferably, however, the voids are filled with polytetrafluoroethylene (PTFE) .
  • Polytetrafluoroethylene molecularly bonds to the armour wires, preventing the wires from separating even after extensive use.
  • the polytetrafluoroethylene also provides the cable with a protective seal and a smooth outside surface.
  • the resulting cable withstands conditions, for example, of pressure and temperature within a well bore, and is resistant to damage by well fluids.
  • the cable is also suitable for supporting relatively large loads by virtue of its high mechanical strength, and permits deployment utilising the minimum of pressure control equipment .
  • the bond formed between the resilient material bonds to the armour wires is consistent throughout the length of the cable. In one embodiment, this is achieved by applying the resilient material to the cable at the time of applying the armour wires.
  • the resilient material may be applied using a pressurised die process similar to that employed in the construction of heavy duty marine umbilicals.
  • the cable is surrounded by a further protective layer.
  • each kilometre length of cable weighs approximately between 60 and 120 kg. Typically, each kilometre length of cable weighs approximately 80 to 100 kg. In a preferred embodiment, the mass of the cable is 94kg per km. - 5 -
  • the breaking strength of the cable is in excess of approximately 9 kN, typically above 12 kN and preferably, in excess of 17 kN.
  • the cable has a working load of above approximately 3 kN, and preferably, above 6 kN.
  • the drawing depicts a conductive slickline cable in accordance with a preferred embodiment of the present invention.
  • the cable has overall dimensions (OD) of 4.95mm ( 0.195").
  • Certain characteristics of the conductive slickline cable are comparable to those of armour cables of, for example, the Rochester stock type 1-H-18LA10 (Rochester Corporation, Virginia, USA) .
  • the conductive slickline cable 10 comprises a conductive core 12 formed of a bundle of seven copper strands 14 (#20 AWG, 7/ .126"BCu) , each strand 14 measuring 0.32 mm ( 0.0126") in diameter.
  • the core 12 is surrounded by a layer of insulating material 16 (0.5842mm (0.023”) Wall EPC), which in turn, is surrounded by an inner layer 18 and outer layer 20 of armour wires 22 (spec.galv. IPS) .
  • the inner layer 18 is formed of 12/0.024" wire and the outer layer is formed of 15/0.03" wire.
  • the inner layer 18 is wrapped around the longitudinal axis of the cable 10 in the opposite direction to the outer layer 20.
  • the arrangement provides the cable 10 with mechanical strength and helps to prevent the cable 10 from untorquing during use.
  • the PTFE also prevents the armour wires 22 from separating with repeated use or loss of tension, and permits deployment utilising the minimum of pressure control equipment.
  • Voids 24 between the armour wires 22 are filled with polytetrafluoroethylene (PTFE) .
  • PTFE polytetrafluoroethylene
  • PTFE is resilient and chemically bonds on a molecular level to the armour wires 22 to provide the cable 10 with a smooth outside surface and to protect the cable 10 from damage caused by well fluids and permits deployment utilising the minimum of pressure control equipment .
  • the cable 10 is suitable for the deployment of services in wellbores.
  • the cable 10 may be used to communicate electrically and power downhole tools in real time.
  • the cable 10 is also is resistant to damage by well fluids and may be used to support large loads. By virtue of the cable's 10 smooth outside surface, the frictional losses involved in raising and lowering the cable 10 in a wellbore are relatively low.
  • Diameter of conductor 14 0.97mm thickness of insulating layer 16 2.13mm diameter of armour wires 22 in inner layer 18 3.18mm diameter or armour wires 22 in outer layer 20 4.70mm weight of cable 10 in air 94kg/km weight of cable 10 in water 79kg/km temperature rating of cable 10 (normal) 136°C temperature rating of cable 10 (intermittent) 149°C
  • a plurality of layers of armour wire may be employed.
  • the PTFE elastomer may be replaced by any resilient material which will bind to the armour wires. Suitable materials include polypropylene, TPX, Tefzel and Teflon PTFE.
  • the conductive slickline cable is surrounded by a sheath of stainless steel, Inconel or another elastomer.
  • the conductive slickline cable is applicable to a wide range of cable sizes.

Landscapes

  • Insulated Conductors (AREA)

Abstract

La présente invention concerne un câble (1) destiné à être utilisé pour déployer des équipements dans un trou de forage. Ce câble comprend une partie centrale conductrice (12) isolée d'au moins une couche (18, 20) de câbles blindés par une couche isolante (16). Afin de contrôler la migration des fluides de forage par le système de contrôle de pression, les pores (24) situées entre les câbles blindés (22) sont remplis de matériau élastique qui empêche les fluides de forage de s'infiltrer dans ces pores (24) et d'endommager le câble (10). Le matériau résilient se fixe fortement aux câbles blindés (22) les empêchant ainsi de se séparer, même après une utilisation répétée ou une perte de tension. Par conséquent, le blindage rempli de matériau élastique assure une force mécanique satisfaisante permettant de soutenir des charges relativement lourdes. Le matériau résilient assure également au câble une surface extérieure lisse.
EP99909088A 1998-03-17 1999-03-17 Cable de manipulation conducteur Withdrawn EP1064657A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9805518.9A GB9805518D0 (en) 1998-03-17 1998-03-17 Conductive slickline cable
GB9805518 1998-03-17
PCT/GB1999/000717 WO1999048111A1 (fr) 1998-03-17 1999-03-17 Cable de manipulation conducteur

Publications (1)

Publication Number Publication Date
EP1064657A1 true EP1064657A1 (fr) 2001-01-03

Family

ID=10828599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99909088A Withdrawn EP1064657A1 (fr) 1998-03-17 1999-03-17 Cable de manipulation conducteur

Country Status (7)

Country Link
EP (1) EP1064657A1 (fr)
AU (1) AU2845899A (fr)
BR (1) BR9908901A (fr)
CA (1) CA2324323A1 (fr)
GB (1) GB9805518D0 (fr)
NO (1) NO20004639L (fr)
WO (1) WO1999048111A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003021301A2 (fr) 2001-08-29 2003-03-13 Sensor Highway Limited Procede et appareil de determination de la temperature de puits souterrains au moyen d'un cable de fibre optique
US7009113B2 (en) 2003-01-22 2006-03-07 Schlumberger Technology Corporation High temperature electrical cable having interstitial filler
GB0425584D0 (en) * 2004-11-20 2004-12-22 Expro North Sea Ltd Improved cable
US7402753B2 (en) 2005-01-12 2008-07-22 Schlumberger Technology Corporation Enhanced electrical cables
US8413723B2 (en) 2006-01-12 2013-04-09 Schlumberger Technology Corporation Methods of using enhanced wellbore electrical cables
US7170007B2 (en) * 2005-01-12 2007-01-30 Schlumburger Technology Corp. Enhanced electrical cables
US7259331B2 (en) 2006-01-11 2007-08-21 Schlumberger Technology Corp. Lightweight armor wires for electrical cables
US8069879B2 (en) 2006-09-15 2011-12-06 Schlumberger Technology Corporation Hydrocarbon application hose
US7912333B2 (en) 2008-02-05 2011-03-22 Schlumberger Technology Corporation Dual conductor fiber optic cable
US12163394B2 (en) 2009-04-17 2024-12-10 Schlumberger Technology Corporation Reduced torque wireline cable
WO2011037974A2 (fr) 2009-09-22 2011-03-31 Schlumberger Canada Limited Câble métallique destiné à l'utilisation avec des ensembles tracteurs de forage
US9412492B2 (en) 2009-04-17 2016-08-09 Schlumberger Technology Corporation Torque-balanced, gas-sealed wireline cables
US11387014B2 (en) 2009-04-17 2022-07-12 Schlumberger Technology Corporation Torque-balanced, gas-sealed wireline cables
DE102009060419A1 (de) * 2009-12-22 2011-06-30 HEW-Kabel GmbH & Co.KG, 51688 Zugfester elektrischer Leiter
AU2014262266A1 (en) * 2010-07-11 2014-12-04 Halliburton Energy Services, Inc. Downhole cables for well operations
EP2769386A4 (fr) 2011-10-17 2016-02-17 Services Petroliers Schlumberger Câble à double utilisation doté d'une encapsulation de fibre optique et destiné à être utilisé dans des opérations de puits de forage
WO2014004026A1 (fr) 2012-06-28 2014-01-03 Schlumberger Canada Limited Câble optoélectrique à puissance élevée doté de multiples chemins d'alimentation et de télémétrie
WO2015081236A2 (fr) 2013-11-27 2015-06-04 Weatherford / Lamb, Inc. Procédé et appareil pour le traitement d'un puits de forage
DE102016206961B4 (de) * 2016-04-25 2022-10-13 Leoni Kabel Gmbh Multifunktionskabel
US10049789B2 (en) 2016-06-09 2018-08-14 Schlumberger Technology Corporation Compression and stretch resistant components and cables for oilfield applications
US12436347B2 (en) 2019-06-28 2025-10-07 Schlumberger Technology Corporation Stranded fiber-optic cable
US12321028B2 (en) 2021-06-10 2025-06-03 Schlumberger Technology Corporation Electro-optical wireline cables

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131757A (en) * 1977-08-10 1978-12-26 United States Steel Corporation Helically wound retaining member for a double caged armored electromechanical cable
US5150443A (en) * 1990-08-14 1992-09-22 Schlumberger Techonolgy Corporation Cable for data transmission and method for manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9948111A1 *

Also Published As

Publication number Publication date
BR9908901A (pt) 2000-11-28
GB9805518D0 (en) 1998-05-13
CA2324323A1 (fr) 1999-09-23
AU2845899A (en) 1999-10-11
NO20004639D0 (no) 2000-09-15
NO20004639L (no) 2000-11-02
WO1999048111A1 (fr) 1999-09-23

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