EP1094194A2 - Flexibles Rohr mit einem elektrischen Kabel für ein Pumpsystem im Bohrloch und Verfahren zur Herstellung und Einordnung eines derartigen Systems - Google Patents

Flexibles Rohr mit einem elektrischen Kabel für ein Pumpsystem im Bohrloch und Verfahren zur Herstellung und Einordnung eines derartigen Systems Download PDF

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Publication number
EP1094194A2
EP1094194A2 EP00301709A EP00301709A EP1094194A2 EP 1094194 A2 EP1094194 A2 EP 1094194A2 EP 00301709 A EP00301709 A EP 00301709A EP 00301709 A EP00301709 A EP 00301709A EP 1094194 A2 EP1094194 A2 EP 1094194A2
Authority
EP
European Patent Office
Prior art keywords
coil tubing
recited
power cable
layer
tubing
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Withdrawn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
EP00301709A
Other languages
English (en)
French (fr)
Other versions
EP1094194A3 (de
Inventor
Howard A. Oswald
Marcus D. Mchugh
Robert A. Meuffels
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.)
Camco International Inc
Original Assignee
Camco International Inc
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 Camco International Inc filed Critical Camco International Inc
Publication of EP1094194A2 publication Critical patent/EP1094194A2/de
Publication of EP1094194A3 publication Critical patent/EP1094194A3/de
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/128—Adaptation of pump systems with down-hole electric drives
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
    • E21B17/206—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables with conductors, e.g. electrical, optical
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

Definitions

  • This invention relates generally to a system and method for installing electrical power cable into coil tubing used in deploying subterranean systems. More particularly, this invention relates to a method of integrating the installation of an electrical power cable within the coil tubing during the manufacturing process. The invention further relates to methods of deploying subterranean systems, such as electric submergible pumping systems, that utilize coil tubing containing an electrical power cable installed during the tubing manufacturing process.
  • remote subsea or subterranean locations such as to drive, monitor or control underground equipment.
  • the power cables may include multiple conductors, such as for three-phase operation, and are commonly shielded by a flexible, durable metallic casing or armor designed to reduce the risk of damage to the power conductors during deployment and use of the equipment.
  • Control signals may be superimposed on power signals in certain applications, or may be transmitted via separate cables, radio telemetry, or other signal transmission techniques.
  • the submerged pumping systems often are deployed on tubing, and the power cable is attached alongside or through the center of the tubing.
  • One particular type of tubing presently employed in such systems is coil tubing, which is available in extended lengths capable of being wound around a storage spool.
  • the coil tubing and subterranean system are deployed into the well by unwinding the coil tubing from the storage spool.
  • Lengths of tubing may be spliced together, as required by the depth at which the submerged equipment is to be deployed.
  • a difficulty arises, however, in the insertion of electrical power cables into the coil tubing.
  • electrical power cable is installed in coil tubing by drawing the cable through extended lengths of tubing, often ten to twenty thousand feet long.
  • Coil tubing has been manufactured around small wires using a long water cooled tube placed inside the coil tubing during the forming, welding, and annealing processes used to create the coil tubing. This method, however, was limited to small wires due to the limited clearance inside the water cooled tube. This technique does not work with electrical power cables, because these cables generally are too large to pass through the water cooled tube.
  • the cable injector is another manufacturing technique for installing electrical wiring. This technique uses high pressure to push the electrical wiring through the coil tubing. However, the cable injector method generally cannot be used for electric submergible pumping system power cables, because these cables are too stiff and heavy.
  • the present invention provides a method for manufacturing coil tubing containing an electrical power cable to respond to these existing needs.
  • the method of the present invention integrates the installation of the electrical power cable into the coil tubing during the manufacturing process of the tubing.
  • the method of manufacturing includes forming a strip of flat metal into tubing creating a linear seam along the tubing's length.
  • the method further includes placing an electrical power cable along the metal strip during the forming process so that the electrical power cable becomes enclosed within the tubing.
  • the method further includes welding the linear seam so that the tubing is fully enclosed and contains the electrical power cable. Additionally, the method may further include annealing the weld and a full body anneal of the coil tubing.
  • a coil tubing system for use in deploying an electric submergible pumping system.
  • the coil tubing system includes an electrical power cable having a plurality of electrical conductors.
  • the coil tubing system is further comprised of metal coil tubing which is wrapped around the electrical power cable.
  • the system includes at least one layer of thermal insulation material between the plurality of conductors and the coil tubing to protect the electrical conductors during the tubing manufacturing process.
  • a method for deploying subterranean systems requiring electrical power.
  • This method includes forming coil tubing from a strip of metal.
  • This method further includes integrating an electrical power cable within the coil tubing during the formation of the coil tubing.
  • the method also includes connecting the subterranean system to the coil tubing and the electrical power cable.
  • the method further includes deploying the subterranean device into a subterranean environment.
  • System 10 may be comprised of a variety of components, however, it typically includes at least a coil tubing 12 and an electric submergible pumping system (ESP) power cable 13.
  • ESP power cable 13 includes a plurality of electrical conductors 14, e.g. three conductors, an electrical insulation layer 16 disposed about each conductor 14, and a thermal insulating barrier 18 disposed about the plurality of conductors 14.
  • Thermal insulation layer 18 protects the conductors 14 and other materials within power cable 13 from exceeding their temperature limits during formation of system 10, including welding and subsequent annealing of coil tubing 12.
  • Layer 18 may comprise one or more of fiberglass cloth or tape, aramid fiber cloth or tape, polyimide tape, PEEK, epoxy or EPDM.
  • ESP power cable 13 typically includes other components.
  • a tape 20 may be wrapped about each insulation layer 16 to act as additional thermal protection for the underlying electrical conductors 14 and electrical insulation 16.
  • a braid 22 also may be disposed about each tape layer 20 to provide added support.
  • An elastomeric jacket 24 may be used to enclose conductors 14 and to provide additional sturdiness and protection for the underlying electrical conductors 14.
  • an armor layer 26 preferably is disposed over jacket 24 to provide even stronger additional protection for the underlying electrical conductors 14.
  • armor layer 26 is made of a metal material.
  • the insulating barrier 18 is disposed over or radially outward of armor layer 26 to provide added insulation from heat generated during manufacturing of system 10.
  • FIG. 2 a schematic view of a manufacturing process for system 10 is illustrated according to a preferred embodiment of the present invention.
  • the manufacturing process permits the integration of ESP power cable 13 into coil tubing 12 during the formation of coil tubing 12.
  • An exemplary manufacturing process for the combination of coil tubing 12 and electrical power cable 13 may comprise a variety of steps.
  • the manufacturing process typically includes a tube forming mill 40 which forms tubing from strip metal 42 stored on a strip metal roll 44.
  • the tube forming mill 40 is comprised of a series of rolls 46.
  • a first series of rolls 46A initially are encountered by the strip metal 42 and begin to bend the edges of the strip upward, gradually forming a "U" shape.
  • Additional rolls 46B and 46C bend the metal strip around a longitudinal axis until the tubing is almost completely enclosed except for a longitudinal seam (see sealed longitudinal seam 48 in Figure 1).
  • the electrical power cable 13 is installed within the tubing 12 in the tube forming mill 40 during the formation process from strip metal to tubing.
  • ESP power cable 13 may be stored on electrical power cable accumulator 50 and fed to forming mill 40 as needed.
  • the installation of the electrical power cable 13 may occur at any stage of the tube forming process before the tubing has become too enclosed to receive ESP power cable 13.
  • Electrical power cable 13 is fed along strip metal 42 as it is bent about the longitudinal axis. For example, after the strip metal has been rolled into a "U" shape the cable may be placed against the U-shaped metal strip, e.g. just prior to roll 46B. The additional series of rolls then bend the U-shaped metal around the ESP power cable 13, thus installing the electrical power cable within the tubing. Once the electrical power cable 13 has been enclosed
  • One possible method of welding the seam is a high-frequency induction method.
  • heat for welding the edges of the seam together is generated by resistance to the flow of an induced electrical current produced by an encircling coil and concentrated at the edges by an internal ferrite ore called an impeder.
  • the heat is confined to a narrow band along the edges of the formed strip and reaches temperatures of 2200 to 2600 °F.
  • a special set of insulated rolls squeeze the edges of the tubing together along the seam, while the tubing edges are at fusion temperature, to produce the seam weld.
  • the tubing 12 is ready to be seam annealed at seam annealing station 54.
  • the tubing is exposed to a slightly lower temperature than seam welding, approximately 1650°F.
  • the tubing is then cooled in a cooling bath at a cooling bath station 56.
  • Additional sets of rolls 58 can be used to accurately size the tubing to its final dimensions.
  • the combined tubing 12 and ESP power cable 13 is then subjected to a full body annealing at body annealing station 60 which heats the tubing to approximately 1,100 to 1,400 °F for approximately one minute. This is the period of greatest threat to the underlying electrical conductors 14, because there is more than just a brief localized exposure to high temperatures at the seam, but rather a longer exposure around the circumference of the tubing 12.
  • the conductors can be exposed to a temperature of greater than 900 °F for just under one minute if not uniquely insulated as described with reference to ESP power cable 13.
  • Insulating barrier 18 in combination with jacket 24, insulation layer 16 and the other layers, provides thermal insulation between coil tubing 12 and conductors 14 to protect the integrity of conductors 14 during the full body annealing stage.
  • the tubing is sent through another cooling bath at a cooling bath station 62 where it is slow cooled before it is ultimately coiled onto a storage reel 64, as a completed product, i.e. system 10.
  • the manufacturing process for the integrated coil tubing and electrical power cable of system 10 may include additional steps.
  • the seam welding process typically produces a small amount of weld flash on both the inside and the outside of the tube.
  • the weld flash on the outside diameter of the tubing may be removed by an external weld flash remover at station 66 preferably disposed between seam welding station 52 and seam annealing station 54.
  • the flash removal is accomplished by a carbide cutting tool contoured to the diameter of the tube being produced.
  • the weld flash on the inside diameter may be controlled in height or removed with a contoured tool inside the tubing.
  • the weld seam is immediately reheated by a narrow induction head to recrystallize the weld's heat affected zone to match the grain structure of the base metal.
  • tubing may be subjected to non-destructive eddy current testing at test station 68 to ensure weld and tubing quality.
  • Station 68 preferably is disposed between rolls 58 and full body annealing station 60.
  • FIG. 3 a front elevational view of a system and method of deploying a subterranean system 70, e.g. an electric submergible pumping system, is illustrated according to a preferred embodiment of the present invention.
  • Deployment of the ESP is accomplished with the combined coil tubing 12 and ESP power cable 13 of the integrated system 10.
  • the method comprises rolling system 10, integrated as described above, onto a storage reel 72.
  • the storage reel 72 is installed as part of a deployment system 74 which is capable of positioning the desired subterranean device in the wellbore by reeling the coil tubing on or off of the storage reel.
  • the deployment system also includes an electrical power source 76 that is connected to one end of the ESP power cable disposed within the coil tubing 12 to provide electrical power to the subterranean system 70.
  • the deployment system 74 may be mounted on a truck or on a skid for deployment offshore.
  • the deployment system also includes a guide 78 to direct the coil tubing into a wellbore 80.
  • the subterranean system 70 Prior to deployment into wellbore 80 the subterranean system 70 is connected electrically to the electrical power cable 13 and physically to the coil tubing 12, as known to those of ordinary skill in the art. The subterranean system 70 may then be lowered into the wellbore by the deployment system 74. An operator can position the subterranean system 70 as required in the wellbore by operation of the deployment system 74. Additionally, the operator can control the electrical power to the subterranean system 70 from the electrical power source 76.
  • integrated system 10 can be utilized in applications where it is submerged in water.
  • the system can be laid along the ocean floor or a lake bed to provide power to production equipment.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Insulated Conductors (AREA)
EP00301709A 1999-10-21 2000-03-02 Flexibles Rohr mit einem elektrischen Kabel für ein Pumpsystem im Bohrloch und Verfahren zur Herstellung und Einordnung eines derartigen Systems Withdrawn EP1094194A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42243499A 1999-10-21 1999-10-21
US422434 1999-10-21

Publications (2)

Publication Number Publication Date
EP1094194A2 true EP1094194A2 (de) 2001-04-25
EP1094194A3 EP1094194A3 (de) 2002-01-23

Family

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EP00301709A Withdrawn EP1094194A3 (de) 1999-10-21 2000-03-02 Flexibles Rohr mit einem elektrischen Kabel für ein Pumpsystem im Bohrloch und Verfahren zur Herstellung und Einordnung eines derartigen Systems

Country Status (2)

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EP (1) EP1094194A3 (de)
NO (1) NO20005309L (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008051341A1 (en) * 2006-10-27 2008-05-02 E. I. Du Pont De Nemours And Company Reinforced polymeric siphon tubes
US7748444B2 (en) 2007-03-02 2010-07-06 Schlumberger Technology Corporation Method and apparatus for connecting, installing, and retrieving a coiled tubing-conveyed electrical submersible pump
WO2014085179A1 (en) * 2012-11-28 2014-06-05 Baker Hughes Incorporated Transmission line for wired pipe
GB2511152A (en) * 2012-10-15 2014-08-27 Schlumberger Holdings Electric submersible pump cables for harsh environments
US9035185B2 (en) 2010-05-03 2015-05-19 Draka Holding N.V. Top-drive power cable
US9722400B2 (en) 2013-06-27 2017-08-01 Baker Hughes Incorporated Application and maintenance of tension to transmission line in pipe
US9915103B2 (en) 2013-05-29 2018-03-13 Baker Hughes, A Ge Company, Llc Transmission line for wired pipe
WO2020180331A1 (en) * 2019-03-07 2020-09-10 Halliburton Energy Services, Inc. Reinforced power cable for electric artificial lift system
US11804314B2 (en) 2017-06-02 2023-10-31 Schlumberger Technology Corporation Processes for making electrical cables

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317003A (en) * 1980-01-17 1982-02-23 Gray Stanley J High tensile multiple sheath cable
GB2106427A (en) * 1981-09-23 1983-04-13 Gen Electric Co Plc The manufacture of mineral insulated cables
EP0505815A2 (de) * 1991-03-28 1992-09-30 Camco International Inc. Flexibles Rohr mit elektrischem Kabel für Bohrlochpumpsystem
US5191173A (en) * 1991-04-22 1993-03-02 Otis Engineering Corporation Electrical cable in reeled tubing
EP0530029A2 (de) * 1991-08-30 1993-03-03 Hydrolex, Inc. Verfahren und Apparat zum Einlegen eines Bohrlochmesskabels im Innern von aufwickelbare Röhren
US5269377A (en) * 1992-11-25 1993-12-14 Baker Hughes Incorporated Coil tubing supported electrical submersible pump
EP0887807A1 (de) * 1997-06-24 1998-12-30 Camco International Inc. Elektrischen mehradrigen Kabels

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317003A (en) * 1980-01-17 1982-02-23 Gray Stanley J High tensile multiple sheath cable
GB2106427A (en) * 1981-09-23 1983-04-13 Gen Electric Co Plc The manufacture of mineral insulated cables
EP0505815A2 (de) * 1991-03-28 1992-09-30 Camco International Inc. Flexibles Rohr mit elektrischem Kabel für Bohrlochpumpsystem
US5191173A (en) * 1991-04-22 1993-03-02 Otis Engineering Corporation Electrical cable in reeled tubing
EP0530029A2 (de) * 1991-08-30 1993-03-03 Hydrolex, Inc. Verfahren und Apparat zum Einlegen eines Bohrlochmesskabels im Innern von aufwickelbare Röhren
US5269377A (en) * 1992-11-25 1993-12-14 Baker Hughes Incorporated Coil tubing supported electrical submersible pump
EP0887807A1 (de) * 1997-06-24 1998-12-30 Camco International Inc. Elektrischen mehradrigen Kabels

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008051341A1 (en) * 2006-10-27 2008-05-02 E. I. Du Pont De Nemours And Company Reinforced polymeric siphon tubes
US7748444B2 (en) 2007-03-02 2010-07-06 Schlumberger Technology Corporation Method and apparatus for connecting, installing, and retrieving a coiled tubing-conveyed electrical submersible pump
US9035185B2 (en) 2010-05-03 2015-05-19 Draka Holding N.V. Top-drive power cable
GB2511152A (en) * 2012-10-15 2014-08-27 Schlumberger Holdings Electric submersible pump cables for harsh environments
US10443315B2 (en) 2012-11-28 2019-10-15 Nextstream Wired Pipe, Llc Transmission line for wired pipe
GB2524917A (en) * 2012-11-28 2015-10-07 Baker Hughes Inc Transmission line for wired pipe
GB2524917B (en) * 2012-11-28 2017-08-02 Baker Hughes Inc Transmission line for wired pipe
WO2014085179A1 (en) * 2012-11-28 2014-06-05 Baker Hughes Incorporated Transmission line for wired pipe
US11131149B2 (en) 2012-11-28 2021-09-28 Baker Hughes Ventures & Growth Llc Transmission line for wired pipe
US9915103B2 (en) 2013-05-29 2018-03-13 Baker Hughes, A Ge Company, Llc Transmission line for wired pipe
US10760349B2 (en) 2013-05-29 2020-09-01 Nextstream Wired Pipe, Llc Method of forming a wired pipe transmission line
US9722400B2 (en) 2013-06-27 2017-08-01 Baker Hughes Incorporated Application and maintenance of tension to transmission line in pipe
US11804314B2 (en) 2017-06-02 2023-10-31 Schlumberger Technology Corporation Processes for making electrical cables
WO2020180331A1 (en) * 2019-03-07 2020-09-10 Halliburton Energy Services, Inc. Reinforced power cable for electric artificial lift system

Also Published As

Publication number Publication date
EP1094194A3 (de) 2002-01-23
NO20005309L (no) 2001-04-23
NO20005309D0 (no) 2000-10-20

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