GB2119949A - Laying cables - Google Patents

Laying cables Download PDF

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Publication number
GB2119949A
GB2119949A GB08213100A GB8213100A GB2119949A GB 2119949 A GB2119949 A GB 2119949A GB 08213100 A GB08213100 A GB 08213100A GB 8213100 A GB8213100 A GB 8213100A GB 2119949 A GB2119949 A GB 2119949A
Authority
GB
United Kingdom
Prior art keywords
cable
pipeline
dispenser
pig
driving member
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
GB08213100A
Other versions
GB2119949B (en
Inventor
Lyndon Reginald Spicer
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB08213100A priority Critical patent/GB2119949B/en
Publication of GB2119949A publication Critical patent/GB2119949A/en
Application granted granted Critical
Publication of GB2119949B publication Critical patent/GB2119949B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/06—Package-supporting devices for a single operative package
    • B65H49/08—Package-supporting devices for a single operative package enclosing the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/10—Package-supporting devices for one operative package and one or more reserve packages
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
    • G02B6/54—Underground or underwater installation; Installation through tubing, conduits or ducts using mechanical means, e.g. pulling or pushing devices
    • G02B6/545—Pulling eyes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
    • H02G1/086—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling using fluid as pulling means, e.g. liquid, pressurised gas or suction means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/32—Optical fibres or optical cables

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Electric Cable Installation (AREA)

Abstract

A technique for deploying a cable, preferably an optical fibre cable, in a pipeline uses a flexible polyurethane moulded pig (2) drawing a dispenser (3) housing an optical fibre cable (14) and fluid pressure in the pipeline (1) drives the pig along the pipeline and as it does so, the fibre optic cable (14) is unwound from the dispenser. A train of dispensers may be attached to the pig (Fig 2 not shown). <IMAGE>

Description

SPECIFICATION Laying cables This invention relates to laying cables, particularly but not exclusively optical fibre cables.
Established methods of laying cables in ducts or pipes involves first providing a hauling cable or wire through the duct or pipe and then connecting the cable to one end of the hauling cable and using the hauling cable to haul the cable through the duct or pipe. Clearly this method is limited in the length of cable which can be laid owing to the friction between the walls of the pipe or duct and the cable size necessary for the link to be established.
According to the present invention there is provided a method of deploying a cable in a pipeline, wherein a driving member adapted to move along the internal bore of the pipeline carries a cable dispenser and the cable is deployed in the pipeline from the dispenser as the driving member moves along the pipeline.
Preferably the cable is unwound from the dispensex from the innermost turns first.
In one embodiment the pig is preferably driven by hydraulic fluid and if the pipe or duct is in use to transmit fluid from one end to the other, then this fluid can be used to drive the pig.
It would be possible to have two or more dispensers connected in series to lay more cable than can be carried on a single dispenser, or alternatively two or more separate cables can be laid at the same time from a dispenser train.
In order that the invention can be clearly understood reference will now be made to the accompanying drawings in which: Figure 1 is a longitudinal cross section through a pipeline showing a cable laying arrangement according to an embodiment of the invention and Figure 2 shows a modification to the Figure 1 embodiment in which several dispensers are connected in series.
Referring to Figure 1 of the drawing a pipeline 1 which has a diameter of 8 inches contains a polyurethane moulded pig indicated generally by the reference numeral 2 attached to a cable dispenser indicated generally by the reference numeral 3 the pig comprises three polyurethane semi-conical cups 4, 5 and 6 held together with polyurethane spaces 7,8 and 9 by means of a bolt 10 running through the centre of the pig. Pigs of this type are available from the manufacturer Pipeline Engineering and Supply Company Ltd. of Richmond, North Yorkshire, England. The pig is flexible in that it can be used in convoluted pipelines and the body of the pig will yield when going round a 1.5 diameter radius band. It would also negotiate cross sectional configurations which deviate from the usual circular configuration of the pipeline due to deformation.
The rear end of the pig 11 has the circular body 12 of the dispenser 3 attached thereto by means of a bolt 13.
The body 12 is made of a plastics material and houses a round optical fibre cable 14. A dispensing central aperture 15 provides the exit for the cable which unwinds from the inside 16 of the winding 17.
The cable can be constructed in accordance with the teachings of our copending patent application (L.R. Spicer -26), although to achieve great length, a single fibre reinforced with a thin outer strength member would be preferable.
The dispenser is supported at the right hand end as viewed in Figure 1, by means of four wheels such as 18 mounted on the ends of spring-like arms 19 which serve to maintain the dispenser body 12 centrally within the bore of the pipeline 1.
In use of the arrangement hydraulic pressure from the right hand side is used to force the pig down the pipeline and as it moves so the optical fibre cable 14 is unwound from the dispenser and becomes laid in the pipeline.
Referring now to Figure 2 where a long length of cable is required to be laid a series of dispensers 3, 3a, 3b and 3c are connected together in series like a "train" and pulled by a common pig 2 by hydraulic pressure along the pipeline 1. As shown in Figure 2 dispensers 3a and 3b are already exhausted and the cable 14a is now being drawn from dispenser 3a.
The cable of dispenser 3a is, as shown at 14, connected to the cable of dispenser 3 so that in one run, the total cable capacity of the four dispensers can be laid in the pipeline 1.
Alternatively several single optical fibre cables could be laid in parallel. Thus referring to Figure 2 the cables from dispensers 3, 3a and 3b could be pulled through each other and through dispenser 3c along with the cable of dispenser 3c to then simultaneously lay four optical fibre cables side by side.
Guide wheels such as 21, 22, 23 and 24 are provided on springy arms which in this case are also used to connect one dispenser with the next. The arms are designated 21a, 22a, 23a, and 24a.
In place of the hydraulically actuated pig 2, it would be possible to use instead a battery operated vehicle with wheels or caterpillar track in order to tow the dispenser or dispensers along the pipeline.
The method described above has the advantage that it is much cheaper and much quicker to lay a cable in this manner rather than draw all the cable through the pipeline by conventional wire-drawing techniques. In addition there is little or no tension required to be applied to the cable so that the cable does not have to be designed to withstand high tensile stresses as would be the case in a normal wire-drawing operation.
1. A method of deploying a cable in a pipeline, wherein a driving member adapted to move along the internal bore of the pipeline carries a cable dispenser and the cable is deployed in the pipeline from the dispenser as the driving member moves along the pipeline.
2. A method as claimed in claim 1, wherein the driving member is a pig driven by hydraulic fluid in the pipeline.
3. A method as claimed in claim 1 or claim 2, wherein the dispenser carries a cable which is wound about an axis parallel to the axis of the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (17)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Laying cables This invention relates to laying cables, particularly but not exclusively optical fibre cables. Established methods of laying cables in ducts or pipes involves first providing a hauling cable or wire through the duct or pipe and then connecting the cable to one end of the hauling cable and using the hauling cable to haul the cable through the duct or pipe. Clearly this method is limited in the length of cable which can be laid owing to the friction between the walls of the pipe or duct and the cable size necessary for the link to be established. According to the present invention there is provided a method of deploying a cable in a pipeline, wherein a driving member adapted to move along the internal bore of the pipeline carries a cable dispenser and the cable is deployed in the pipeline from the dispenser as the driving member moves along the pipeline. Preferably the cable is unwound from the dispensex from the innermost turns first. In one embodiment the pig is preferably driven by hydraulic fluid and if the pipe or duct is in use to transmit fluid from one end to the other, then this fluid can be used to drive the pig. It would be possible to have two or more dispensers connected in series to lay more cable than can be carried on a single dispenser, or alternatively two or more separate cables can be laid at the same time from a dispenser train. In order that the invention can be clearly understood reference will now be made to the accompanying drawings in which: Figure 1 is a longitudinal cross section through a pipeline showing a cable laying arrangement according to an embodiment of the invention and Figure 2 shows a modification to the Figure 1 embodiment in which several dispensers are connected in series. Referring to Figure 1 of the drawing a pipeline 1 which has a diameter of 8 inches contains a polyurethane moulded pig indicated generally by the reference numeral 2 attached to a cable dispenser indicated generally by the reference numeral 3 the pig comprises three polyurethane semi-conical cups 4, 5 and 6 held together with polyurethane spaces 7,8 and 9 by means of a bolt 10 running through the centre of the pig. Pigs of this type are available from the manufacturer Pipeline Engineering and Supply Company Ltd. of Richmond, North Yorkshire, England. The pig is flexible in that it can be used in convoluted pipelines and the body of the pig will yield when going round a 1.5 diameter radius band. It would also negotiate cross sectional configurations which deviate from the usual circular configuration of the pipeline due to deformation. The rear end of the pig 11 has the circular body 12 of the dispenser 3 attached thereto by means of a bolt 13. The body 12 is made of a plastics material and houses a round optical fibre cable 14. A dispensing central aperture 15 provides the exit for the cable which unwinds from the inside 16 of the winding 17. The cable can be constructed in accordance with the teachings of our copending patent application (L.R. Spicer -26), although to achieve great length, a single fibre reinforced with a thin outer strength member would be preferable. The dispenser is supported at the right hand end as viewed in Figure 1, by means of four wheels such as 18 mounted on the ends of spring-like arms 19 which serve to maintain the dispenser body 12 centrally within the bore of the pipeline 1. In use of the arrangement hydraulic pressure from the right hand side is used to force the pig down the pipeline and as it moves so the optical fibre cable 14 is unwound from the dispenser and becomes laid in the pipeline. Referring now to Figure 2 where a long length of cable is required to be laid a series of dispensers 3, 3a, 3b and 3c are connected together in series like a "train" and pulled by a common pig 2 by hydraulic pressure along the pipeline 1. As shown in Figure 2 dispensers 3a and 3b are already exhausted and the cable 14a is now being drawn from dispenser 3a. The cable of dispenser 3a is, as shown at 14, connected to the cable of dispenser 3 so that in one run, the total cable capacity of the four dispensers can be laid in the pipeline 1. Alternatively several single optical fibre cables could be laid in parallel. Thus referring to Figure 2 the cables from dispensers 3, 3a and 3b could be pulled through each other and through dispenser 3c along with the cable of dispenser 3c to then simultaneously lay four optical fibre cables side by side. Guide wheels such as 21, 22, 23 and 24 are provided on springy arms which in this case are also used to connect one dispenser with the next. The arms are designated 21a, 22a, 23a, and 24a. In place of the hydraulically actuated pig 2, it would be possible to use instead a battery operated vehicle with wheels or caterpillar track in order to tow the dispenser or dispensers along the pipeline. The method described above has the advantage that it is much cheaper and much quicker to lay a cable in this manner rather than draw all the cable through the pipeline by conventional wire-drawing techniques. In addition there is little or no tension required to be applied to the cable so that the cable does not have to be designed to withstand high tensile stresses as would be the case in a normal wire-drawing operation. CLAIMS
1. A method of deploying a cable in a pipeline, wherein a driving member adapted to move along the internal bore of the pipeline carries a cable dispenser and the cable is deployed in the pipeline from the dispenser as the driving member moves along the pipeline.
2. A method as claimed in claim 1, wherein the driving member is a pig driven by hydraulic fluid in the pipeline.
3. A method as claimed in claim 1 or claim 2, wherein the dispenser carries a cable which is wound about an axis parallel to the axis of the pipeline.
4. A method as claimed in claim 1, claim 2 or claim 3, wherein the pig is flexible and made of moulded polyurethane.
5. A method as claimed in any preceding claim, wherein the dispenser is supported at one end by the pig and at the other end by guides which contact the internal bore of the pipeline.
6. A method as claimed in claim 5, wherein at least one of the guides comprises a wheel mounted on a spring arm attached to the other end of the dispenser.
7. A method as claimed in any preceding claim, wherein there are two or more dispensers whose cables have been connected together so that first the cable from one dispenser is deployed in the pipeline and then, subsequently, the cable of the next adjacent dispenser is deployed further on along the pipeline.
8. A method of deploying a cable in a pipeline substantially as hereinbefore described with referpence to Figure 1 or Figure 2 of the accompanying drawings.
9. Apparatus for deploying a cable in a pipeline, comprising a driving member adapted to be driven along the inside of the pipeline and a dispenser attached to or adapted to be attached to the driving member whereby when the driving member is driven along the pipeline the dispenser will deploy the cable in the pipeline.
10. Apparatus as claimed in claim 9, wherein the driving member is a pig adapted to be driven along the pipeline by fluid in the pipeline.
11. Apparatus as claimed 10, wherein the dispen sercarries a cable which is wound around an axis which, in use, will lie parallel to the axis of the pipline.
12. Apparatus as claimed in claim 11, wherein the dispenser is mounted at one end on the driving member and at the other end has guide members which will, in use, embrace the internal bore of the pipeline to maintain the other end of the dispenser spaced from the internal bore of the pipeline.
13. Apparatus as claimed in any of claims 9 to 12, wherein the driving member comprises a pig of moulded polyurethane.
14. Apparatus as claimed in any of the claims 9 to 13 comprising two or more dispensers whose cables are connected together so that in use the cable from one dispenser will be deployed before the cable of the next adjacent dispenser is deployed further along the pipeline.
15. Apparatus for deploying a cable in a pipeline substantially as hereinbefore described with reference to Figure 1 or Figure 2 of the accompanying drawings.
16. A dispenser for deploying a cable in a pipeline comprising a housing, a wound cable carried by the housing, means for attaching the cable to a driving member for carrying the dispenser along the inside of the pipeline, and guide means attached to the housing and a duct to bear against the internal bore of the pipeline in use, to maintain the housing spaced from the internal bore of the pipeline.
17. A dispenser substantialiy as hereinbefore described with reference to Figure 1 of the accompanying drawings.
GB08213100A 1982-05-06 1982-05-06 Laying cables Expired GB2119949B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08213100A GB2119949B (en) 1982-05-06 1982-05-06 Laying cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08213100A GB2119949B (en) 1982-05-06 1982-05-06 Laying cables

Publications (2)

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GB2119949A true GB2119949A (en) 1983-11-23
GB2119949B GB2119949B (en) 1986-01-08

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157019A (en) * 1984-03-29 1985-10-16 Bicc Plc Manufacture of optical cable
GB2190457A (en) * 1986-05-17 1987-11-18 Stc Plc Hydraulic cable installation system
US5022634A (en) * 1987-03-23 1991-06-11 British Telecommunications Public Limited Company Optical fibre installation
US5156376A (en) * 1982-05-06 1992-10-20 Standard Telephones And Cables Public Limited Company Laying cables
US5169126A (en) * 1982-11-08 1992-12-08 British Telecommunications Public Limited Company Method and apparatus for installing transmission lines
US5199689A (en) * 1988-06-02 1993-04-06 British Telecommunications Public Limited Company Transmission line installation
GB2312995A (en) * 1996-05-08 1997-11-12 Heidemij Advies Bv System for drawing a cable through a conduit
EP0978715A1 (en) * 1998-08-03 2000-02-09 GESO Gesellschaft für Sensorik, Geotechnischen Umweltschutz und Mathematiche Modellierung mbH Jena Monitoring and communication in pipings with multiple fiber cables and the positioning thereof
GB2349440A (en) * 1999-04-15 2000-11-01 Sensor Highway Ltd Cable laying pig
US6364290B1 (en) 1996-09-19 2002-04-02 British Telecommunications Public Limited Company Blowing head including a buckle detector
WO2002082151A1 (en) * 2001-04-07 2002-10-17 Ccs Technology, Inc. Cable laying and apparatus therefor
EP1854959A1 (en) * 2006-05-12 2007-11-14 Services Pétroliers Schlumberger Method and apparatus for locating a plug within the well
EP2110510A1 (en) * 2008-04-15 2009-10-21 Services Pétroliers Schlumberger Method and apparatus for measuring return flow in a well
WO2010061341A2 (en) 2008-11-25 2010-06-03 Simple Plans Ltd. Device for routing wire
US8436743B2 (en) 2007-05-04 2013-05-07 Schlumberger Technology Corporation Method and apparatus for measuring a parameter within the well with a plug
WO2017009671A1 (en) * 2015-07-16 2017-01-19 Well-Sense Technology Limited Wellbore devices and methods
CN111810768A (en) * 2020-06-29 2020-10-23 武汉理工光科股份有限公司 Method and device for monitoring running state of pipe cleaner based on distributed optical fiber sensing
US11346172B2 (en) 2018-01-10 2022-05-31 Well-Sense Technology Limited Through-bore spool apparatus

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156376A (en) * 1982-05-06 1992-10-20 Standard Telephones And Cables Public Limited Company Laying cables
US6173107B1 (en) 1982-11-08 2001-01-09 British Telecommunications Public Limited Company Method and apparatus for installing transmissions
US5169126A (en) * 1982-11-08 1992-12-08 British Telecommunications Public Limited Company Method and apparatus for installing transmission lines
US6328283B1 (en) 1982-11-08 2001-12-11 British Telecommunications Public Limited Company Method and apparatus for installing transmission lines
GB2157019A (en) * 1984-03-29 1985-10-16 Bicc Plc Manufacture of optical cable
GB2190457A (en) * 1986-05-17 1987-11-18 Stc Plc Hydraulic cable installation system
GB2190457B (en) * 1986-05-17 1990-12-19 Stc Plc Hydraulic cable installation system
US5022634A (en) * 1987-03-23 1991-06-11 British Telecommunications Public Limited Company Optical fibre installation
US5199689A (en) * 1988-06-02 1993-04-06 British Telecommunications Public Limited Company Transmission line installation
GB2312995A (en) * 1996-05-08 1997-11-12 Heidemij Advies Bv System for drawing a cable through a conduit
US6364290B1 (en) 1996-09-19 2002-04-02 British Telecommunications Public Limited Company Blowing head including a buckle detector
EP0978715A1 (en) * 1998-08-03 2000-02-09 GESO Gesellschaft für Sensorik, Geotechnischen Umweltschutz und Mathematiche Modellierung mbH Jena Monitoring and communication in pipings with multiple fiber cables and the positioning thereof
GB2349440A (en) * 1999-04-15 2000-11-01 Sensor Highway Ltd Cable laying pig
GB2349440B (en) * 1999-04-15 2003-07-23 Sensor Highway Ltd Pipeline cable deployment apparatus and method
WO2002082151A1 (en) * 2001-04-07 2002-10-17 Ccs Technology, Inc. Cable laying and apparatus therefor
WO2007131662A1 (en) * 2006-05-12 2007-11-22 Services Petroliers Schlumberger Method and apparatus for locating a plug within the well
EP1854959A1 (en) * 2006-05-12 2007-11-14 Services Pétroliers Schlumberger Method and apparatus for locating a plug within the well
EA014946B1 (en) * 2006-05-12 2011-04-29 Шлюмбергер Текнолоджи Б.В. Method and apparatus for locating a plug within the well
CN101405474B (en) * 2006-05-12 2012-10-03 普拉德研究及开发股份有限公司 Method and apparatus for locating a plug within the well
US8305228B2 (en) 2006-05-12 2012-11-06 Schlumberger Technology Corporation Method and apparatus for locating a plug within the well
US8436743B2 (en) 2007-05-04 2013-05-07 Schlumberger Technology Corporation Method and apparatus for measuring a parameter within the well with a plug
EP2110510A1 (en) * 2008-04-15 2009-10-21 Services Pétroliers Schlumberger Method and apparatus for measuring return flow in a well
WO2009127328A1 (en) * 2008-04-15 2009-10-22 Services Petroliers Schlumberger Method and apparatus for measuring return flow in a well
US8517096B2 (en) 2008-04-15 2013-08-27 Schlumberger Technology Corporation Methods and apparatus for measuring return flow in a well
GB2468113A (en) * 2008-11-25 2010-09-01 Ram Friedman A device for inserting a guiding wire into a pipe or tube
WO2010061341A2 (en) 2008-11-25 2010-06-03 Simple Plans Ltd. Device for routing wire
WO2017009671A1 (en) * 2015-07-16 2017-01-19 Well-Sense Technology Limited Wellbore devices and methods
US11168543B2 (en) 2015-07-16 2021-11-09 Well-Sense Technology Limited Optical fibre deployment
US11346172B2 (en) 2018-01-10 2022-05-31 Well-Sense Technology Limited Through-bore spool apparatus
US11761282B2 (en) 2018-01-10 2023-09-19 Well-Sense Technology Limited Through-bore spool apparatus
EP4274042A3 (en) * 2018-01-10 2024-01-03 Well-Sense Technology Limited Apparatus and method for deploying cable in a borehole
CN111810768A (en) * 2020-06-29 2020-10-23 武汉理工光科股份有限公司 Method and device for monitoring running state of pipe cleaner based on distributed optical fiber sensing
CN111810768B (en) * 2020-06-29 2021-11-09 武汉理工光科股份有限公司 Method and device for monitoring running state of pipe cleaner based on distributed optical fiber sensing

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732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee