CA2241578A1 - Multiconductor electrical cable - Google Patents
Multiconductor electrical cable Download PDFInfo
- Publication number
- CA2241578A1 CA2241578A1 CA 2241578 CA2241578A CA2241578A1 CA 2241578 A1 CA2241578 A1 CA 2241578A1 CA 2241578 CA2241578 CA 2241578 CA 2241578 A CA2241578 A CA 2241578A CA 2241578 A1 CA2241578 A1 CA 2241578A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid barrier
- insulating material
- surrounding
- ethylene propylene
- alloys
- 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.)
- Abandoned
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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
Landscapes
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
A multiconductor electrical cable for use in a subterranean wellbore includes at least one electrical conductor surrounded by one or more layers of insulating material, such as EPDM. A fluid barrier, such as an extruded layer of lead or a lead alloy, surrounds the insulating material. To protect the fluid barrier from damage during the subsequent armoring process, a non-braided material is applied, as an extrusion or a tape. The non-braided material can be applied immediately after the fluid barrier is applied, not as a separate process, thereby reducing the risk of damage to the fragile fluid barrier, and at a cost less than the braided materials used in the past.
Description
CA 02241'.78 1998-06-23 "MULTICONDUCTOR ELECTRICAL CABLE"
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to multiconductor electrical cables and, more 5 particularly, to multiconductor electrical cables for use in subterranean wellbores.
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to multiconductor electrical cables and, more 5 particularly, to multiconductor electrical cables for use in subterranean wellbores.
2. Description of Related Art Multiconductor electrical cables that are used to power wellbore equipment, such as electrical submergible pumping systems, must be capable of withstanding the high temperatures, high pressures and/or corrosive fluids often encountered within 10 subterranean wellbores. As used herein, the term "high temperature" means temperatures of greater than about 180 F and as high as about 500 F. The term "high pressure" means pressures as high as about 5,000 psi. Further, the term "corrosive fluids" means liquids and gases which can cause degradation to cable in~ ting materials and/or corrosion to the electrical conductors, such as liquids and/or gases containing 15 hydrogen sulfide, carbon dioxide, brine, water, and the like.
Subterranean wellbore cables include several layers of different materials to either protect the copper conductors from llle,h~ical damage and/or from damage from corrosive ~luids. Usually, the copper conductors are sheathed in one or more layers of ins~ tin~ materials, such as ethylene propylene diene methylene terpolymer ("EPDM"), 20 and a thin sheath of extruded lead to act as a fluid barrier. As a final protection, a metal armor is applied over the electrical conductors.
To protect the thin sheath of extruded lead from mechanical damage, such as cracks from bending and scratches from abrasion, a protective braid is woven around the electrical conductors. When the electrical conductors leave the metal extruder, where CA 02241~78 1998-06-23 the fluid barrier is applied, they are reeled onto a spool, transported to the braiding machines, fed through the braiding machines, and then transported to the armoring machines. Each of these steps greatly increases the chances for the fluid barrier to be damaged, which directly results in power cable failures.
If damage does occur in the manufacturing process, then once the power cable is installed and a failure occurs, then, the fluid production from the wellbore is ceased, resulting in lost revenue to the operator. In addition, expensive and time-consuming cable retrieval, repair and reinst~ tion procedures must be undertaken.
There is a need for a multiconductor power cable, and methods of manufacture 10 thereof, for use in subterranean wellbores that eliminates the braiding process to form a protection of the metallic fluid barrier.
SUMMARY OF THE INVENTION
The present invention has been contemplated to overcome the foregoing deficiencies and meet the above described needs. Specifically, the present invention is 15 a multiconductor electrical cable for use in a subterranean wellbore that includes at least one electrical conductor surrounded by one or more layers of in~ul~ting material. A fluid barrier, such as an extruded layer of lead or tin alloy, surrounds the in~ ting material.
To protect the fragile fluid barrier during the subsequent armoring process, a non-braided protective material is applied as an extrusion or a tape. The non-braided 20 protective material can be applied immediately after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier during m~ f~ctllring. In addition, the non-braided protective material can be applied with simple forms or wrapping machines that are less complex and less costly than the prior braiding machines.
CA 02241~78 1998-06-23 BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross-sectional, perspective view of one preferred embodiment of a multiconductor electrical cable of the present invention, with a longitudinal wrap of non-braided material above the fluid barrier.
Figure 2 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with a spiral wrap of non-braided material.
Figure 3 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with an 10 extruded layer of non-braided material.
Figure 4 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As described above, the present invention comprises a multiconductor electrical 15 cable for use in a subterranean wellbore. The cable includes at least one electrical conductor surrounded by one or more layers of im~ ing material, with a fluid barrier surrounding the in~ ting material. To protect the fragile fluid barrier during the subsequent armoring process, a non-braided protective material is applied as an extrusion or a tape. The non-braided protective material can be applied immediately 20 after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier.
While the power cable of the present invention can be used in many differing power tr~n~mission environments, for the purposes of the present discussion it will be assumed that the power cable is used to supply electricity to an electric submergible CA 02241=.78 1998-06-23 pumping system ("ESP"). As is well known to those skilled in the art, the ESP is set within a casing that is cemented within a subterranean wellbore that penetrates one or more subterranean earthen formations. Typical ESP's comprises an elongated electric motor, an oil-filled motor protector, and a multistage pump connected to a production 5 tubing. The electrical cable extends from a surface power source downwardly within the casing and is operatively connected to the electric motor.
The electrical cable of the present invention is made to withstand relatively high temperatures, high pressures and corrosive fluids encountered within subterranean wellbores; however, it should be understood that the electrical cable of the present 10 invention can also be used in less difficult applications, such as surface power tr~n~mi~sion, under water uses, and the like. As used herein, the term "high teml)el~l~lre" means temperatures of greater than about 180 F and as high as about 500 F. The term "high pressure" means pressures as high as about 5,000 psi. Further, the term "corrosive fluids" means liquids and gases which can cause degradation to 15 in~l-l,.ting materials and/or corrosion to the electrical conductors, such as liquids and/or gases cont~ining hydrogen sulfide, carbon dioxide, water, and the like.
To aid in the underst~ntling of the features of the present invention, reference is made to the accompanying drawings. Figure 1 shows one preferred embodiment of an electrical cable 10 ofthe present invention of a relatively flat configuration, with three 20 electrical conductors 12 in parallel and side-by-side relationship. The electrical conductors 12 are single drawn wires of copper or copper alloys, as shown in Figures 1-3, or from a twist of several wires, as shown in Figure 4. For typical wellbore applications, the conductors 12 are single drawn wires having a diameter or gauge thickness offrom about 0.160" (6 AWG) to about 0.414" (2/0 AWG). If the cable 10 CA 02241~78 1998-06-23 is to be used in extremely corrosive environments, the conductors 12 may have a relatively thin coating (not shown) of lead, tin or alloys thereof, hot dipped, heat extruded, or electroplated thereon. One or more ground wires (not shown) may be included, as well as other wires, conductors, conduits, fiber optics, and the like, as may S be used to transmit fluids and/or information and command signals through the power cable 10.
At least one of the electrical conductors 12, and preferably all of the conductors 12, is sheathed in at least one layer of an inc~ tin~ material 14 selected from the group consisting of ethylene propylene diene methylene, ethylene propylene rubber, 10 polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof. If a polyether ins~ ing material is selecte~l, then preferred materials are selected from the group consisting of polyether-ketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetherketoneetherketoneketone (PEKEKK), and mixtures, blends and alloys thereof.
15 The in~ ting material 14 is applied to the conductor 12 by spiral or longitudinal wrapping, or preferably by heat extrusion, as is well known to those skilled in the art.
To protect the conductors 12 and the insulation material 14 from damage caused by corrosive fluids, a fluid barrier 16 is applied to the outer surface of the insul~ting material 14. The fluid barrier 16 is preferably one or more extruded layers of a metal, 20 such as lead, tin, and/or alloys thereof.
As described previously, the fluid barrier 16 is fragile and very susceptible to cracking and abrasion damage during the m~nllf~ctllring process. Therefore, a braid of nylon threads has been applied to protect the fluid barrier during subsequent transport and armoring process. As described previously, this braiding process is relatively . CA 02241~78 1998-06-23 expensive as compared to extruding processes, uses relatively complex machines as compal ed to extruding machines, and requires the insulated and sheathed conductors to be spooled onto a reel, moved to the braiding machines, spooled through the braiding m~çhines, respooled onto a reel, and then moved to the armoring machines. All of this spooling and transport can lead to damage to the fluid barrier.
To eliminate or at least to greatly reduce the chances of damage to the fluid barrier 16 during the manufacturing process, with the present invention the prior nylon braid is elimin~ted and a new non-braided protective material 18 is applied in one or more layers to the fluid barrier 16 as a tape or as an extrusion. The protective material 18 is selected from the group comprising fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer,ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof.
To assist in dissipating static electrical charges within the cable 10 to the outer metallic armor, and to provide a grounding of the armor when the cable 10 is installed in a wellbore, the non-braided protective material 18 is selected to be itself semi-conductive, i.e., have a resistivity less than about 10 K ohm/meter, or include one or more threads and/or fibers of semi-conductive materials, such as carbon impregnated nylon threads or other similar material.
One or more layers of the non-braided protective material 18 can be applied to the in~ ted and sheathed conductors 12 as a separate process, as before with the nylon braid, or preferably as a process that is in-line and immediately adjacent to the machinery that applies the fluid barrier 16. Specifically and for example, the protective material 18 can be in the form of a tape that is passed through a conical form and longitudinally CA 02241~78 1998-06-23 wrapped around the insulated and sheathed conductor 12, as shown in Figure 1. The tape of protective material 18 can be thermoplastic or thermoset, and as such a seam 20 of the protective material 18 can be sealed by the extemal application of heat to seal the seam. In place of the application of heat or in addition thereto, a solvent or glue can be 5 used along the seam 20 to create a seal.
When the fluid barrier 16 is a heat extruded layer of metal, the fluid barrier 16 exits that extrusion machinery is at about 300 degrees F to about 400 degrees F.
Preferably, the seam 20 is sealed simply by applying the tape of protective material 18 immediately thereafter so that the residual heat from the immediately prior metal 10 extrusion will cause the seam 20 to seal.
The tape of the protective material 18 can be applied as a spiral wrap, as shown in Figure 2, and as one or more extruded layers, as shown in Figure 3. The cable 10 can also include a jacket of elastomeric material 22, as shown in Figure 4, that surrounds the in~ul~ted and ~hP~thed conductors 12. This jacket 22 can be formed from tapes and/or 15 one or more extruded layers of elastomeric material selected from the group consisting of nitrile rubber, ethylene propylene, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, polyethylene, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof. A~er the protective material 18 has been applied, an outer protective ammor 24 is spirally wrapped there 20 around, as is well known to those skilled in the art.
As can be understood from the previous discussion, the present invention provides an electrical cable that does not need a separate braiding process, with its illhel elll risks of damage to the fragile fluid barrier, and uses material and processes that are less expensive than the prior braided material.
CA 02241~78 1998-06-23 Whereas the present invention has been described in particular relation to the drawings attached hereto, it should be understood that other and further modifications, apart from those shown or suggested herein, may be made within the scope and spirit of the present invention.
Subterranean wellbore cables include several layers of different materials to either protect the copper conductors from llle,h~ical damage and/or from damage from corrosive ~luids. Usually, the copper conductors are sheathed in one or more layers of ins~ tin~ materials, such as ethylene propylene diene methylene terpolymer ("EPDM"), 20 and a thin sheath of extruded lead to act as a fluid barrier. As a final protection, a metal armor is applied over the electrical conductors.
To protect the thin sheath of extruded lead from mechanical damage, such as cracks from bending and scratches from abrasion, a protective braid is woven around the electrical conductors. When the electrical conductors leave the metal extruder, where CA 02241~78 1998-06-23 the fluid barrier is applied, they are reeled onto a spool, transported to the braiding machines, fed through the braiding machines, and then transported to the armoring machines. Each of these steps greatly increases the chances for the fluid barrier to be damaged, which directly results in power cable failures.
If damage does occur in the manufacturing process, then once the power cable is installed and a failure occurs, then, the fluid production from the wellbore is ceased, resulting in lost revenue to the operator. In addition, expensive and time-consuming cable retrieval, repair and reinst~ tion procedures must be undertaken.
There is a need for a multiconductor power cable, and methods of manufacture 10 thereof, for use in subterranean wellbores that eliminates the braiding process to form a protection of the metallic fluid barrier.
SUMMARY OF THE INVENTION
The present invention has been contemplated to overcome the foregoing deficiencies and meet the above described needs. Specifically, the present invention is 15 a multiconductor electrical cable for use in a subterranean wellbore that includes at least one electrical conductor surrounded by one or more layers of in~ul~ting material. A fluid barrier, such as an extruded layer of lead or tin alloy, surrounds the in~ ting material.
To protect the fragile fluid barrier during the subsequent armoring process, a non-braided protective material is applied as an extrusion or a tape. The non-braided 20 protective material can be applied immediately after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier during m~ f~ctllring. In addition, the non-braided protective material can be applied with simple forms or wrapping machines that are less complex and less costly than the prior braiding machines.
CA 02241~78 1998-06-23 BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross-sectional, perspective view of one preferred embodiment of a multiconductor electrical cable of the present invention, with a longitudinal wrap of non-braided material above the fluid barrier.
Figure 2 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with a spiral wrap of non-braided material.
Figure 3 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention, with an 10 extruded layer of non-braided material.
Figure 4 is a cross-sectional, perspective view of an alternate preferred embodiment of a multiconductor electrical cable of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As described above, the present invention comprises a multiconductor electrical 15 cable for use in a subterranean wellbore. The cable includes at least one electrical conductor surrounded by one or more layers of im~ ing material, with a fluid barrier surrounding the in~ ting material. To protect the fragile fluid barrier during the subsequent armoring process, a non-braided protective material is applied as an extrusion or a tape. The non-braided protective material can be applied immediately 20 after the fluid barrier is applied, not as a separate process as in the past with braided materials, thereby reducing the risk of damage to the fragile fluid barrier.
While the power cable of the present invention can be used in many differing power tr~n~mission environments, for the purposes of the present discussion it will be assumed that the power cable is used to supply electricity to an electric submergible CA 02241=.78 1998-06-23 pumping system ("ESP"). As is well known to those skilled in the art, the ESP is set within a casing that is cemented within a subterranean wellbore that penetrates one or more subterranean earthen formations. Typical ESP's comprises an elongated electric motor, an oil-filled motor protector, and a multistage pump connected to a production 5 tubing. The electrical cable extends from a surface power source downwardly within the casing and is operatively connected to the electric motor.
The electrical cable of the present invention is made to withstand relatively high temperatures, high pressures and corrosive fluids encountered within subterranean wellbores; however, it should be understood that the electrical cable of the present 10 invention can also be used in less difficult applications, such as surface power tr~n~mi~sion, under water uses, and the like. As used herein, the term "high teml)el~l~lre" means temperatures of greater than about 180 F and as high as about 500 F. The term "high pressure" means pressures as high as about 5,000 psi. Further, the term "corrosive fluids" means liquids and gases which can cause degradation to 15 in~l-l,.ting materials and/or corrosion to the electrical conductors, such as liquids and/or gases cont~ining hydrogen sulfide, carbon dioxide, water, and the like.
To aid in the underst~ntling of the features of the present invention, reference is made to the accompanying drawings. Figure 1 shows one preferred embodiment of an electrical cable 10 ofthe present invention of a relatively flat configuration, with three 20 electrical conductors 12 in parallel and side-by-side relationship. The electrical conductors 12 are single drawn wires of copper or copper alloys, as shown in Figures 1-3, or from a twist of several wires, as shown in Figure 4. For typical wellbore applications, the conductors 12 are single drawn wires having a diameter or gauge thickness offrom about 0.160" (6 AWG) to about 0.414" (2/0 AWG). If the cable 10 CA 02241~78 1998-06-23 is to be used in extremely corrosive environments, the conductors 12 may have a relatively thin coating (not shown) of lead, tin or alloys thereof, hot dipped, heat extruded, or electroplated thereon. One or more ground wires (not shown) may be included, as well as other wires, conductors, conduits, fiber optics, and the like, as may S be used to transmit fluids and/or information and command signals through the power cable 10.
At least one of the electrical conductors 12, and preferably all of the conductors 12, is sheathed in at least one layer of an inc~ tin~ material 14 selected from the group consisting of ethylene propylene diene methylene, ethylene propylene rubber, 10 polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof. If a polyether ins~ ing material is selecte~l, then preferred materials are selected from the group consisting of polyether-ketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetherketoneetherketoneketone (PEKEKK), and mixtures, blends and alloys thereof.
15 The in~ ting material 14 is applied to the conductor 12 by spiral or longitudinal wrapping, or preferably by heat extrusion, as is well known to those skilled in the art.
To protect the conductors 12 and the insulation material 14 from damage caused by corrosive fluids, a fluid barrier 16 is applied to the outer surface of the insul~ting material 14. The fluid barrier 16 is preferably one or more extruded layers of a metal, 20 such as lead, tin, and/or alloys thereof.
As described previously, the fluid barrier 16 is fragile and very susceptible to cracking and abrasion damage during the m~nllf~ctllring process. Therefore, a braid of nylon threads has been applied to protect the fluid barrier during subsequent transport and armoring process. As described previously, this braiding process is relatively . CA 02241~78 1998-06-23 expensive as compared to extruding processes, uses relatively complex machines as compal ed to extruding machines, and requires the insulated and sheathed conductors to be spooled onto a reel, moved to the braiding machines, spooled through the braiding m~çhines, respooled onto a reel, and then moved to the armoring machines. All of this spooling and transport can lead to damage to the fluid barrier.
To eliminate or at least to greatly reduce the chances of damage to the fluid barrier 16 during the manufacturing process, with the present invention the prior nylon braid is elimin~ted and a new non-braided protective material 18 is applied in one or more layers to the fluid barrier 16 as a tape or as an extrusion. The protective material 18 is selected from the group comprising fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer,ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof.
To assist in dissipating static electrical charges within the cable 10 to the outer metallic armor, and to provide a grounding of the armor when the cable 10 is installed in a wellbore, the non-braided protective material 18 is selected to be itself semi-conductive, i.e., have a resistivity less than about 10 K ohm/meter, or include one or more threads and/or fibers of semi-conductive materials, such as carbon impregnated nylon threads or other similar material.
One or more layers of the non-braided protective material 18 can be applied to the in~ ted and sheathed conductors 12 as a separate process, as before with the nylon braid, or preferably as a process that is in-line and immediately adjacent to the machinery that applies the fluid barrier 16. Specifically and for example, the protective material 18 can be in the form of a tape that is passed through a conical form and longitudinally CA 02241~78 1998-06-23 wrapped around the insulated and sheathed conductor 12, as shown in Figure 1. The tape of protective material 18 can be thermoplastic or thermoset, and as such a seam 20 of the protective material 18 can be sealed by the extemal application of heat to seal the seam. In place of the application of heat or in addition thereto, a solvent or glue can be 5 used along the seam 20 to create a seal.
When the fluid barrier 16 is a heat extruded layer of metal, the fluid barrier 16 exits that extrusion machinery is at about 300 degrees F to about 400 degrees F.
Preferably, the seam 20 is sealed simply by applying the tape of protective material 18 immediately thereafter so that the residual heat from the immediately prior metal 10 extrusion will cause the seam 20 to seal.
The tape of the protective material 18 can be applied as a spiral wrap, as shown in Figure 2, and as one or more extruded layers, as shown in Figure 3. The cable 10 can also include a jacket of elastomeric material 22, as shown in Figure 4, that surrounds the in~ul~ted and ~hP~thed conductors 12. This jacket 22 can be formed from tapes and/or 15 one or more extruded layers of elastomeric material selected from the group consisting of nitrile rubber, ethylene propylene, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, polyethylene, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof. A~er the protective material 18 has been applied, an outer protective ammor 24 is spirally wrapped there 20 around, as is well known to those skilled in the art.
As can be understood from the previous discussion, the present invention provides an electrical cable that does not need a separate braiding process, with its illhel elll risks of damage to the fragile fluid barrier, and uses material and processes that are less expensive than the prior braided material.
CA 02241~78 1998-06-23 Whereas the present invention has been described in particular relation to the drawings attached hereto, it should be understood that other and further modifications, apart from those shown or suggested herein, may be made within the scope and spirit of the present invention.
Claims (22)
1. A multiconductor electrical cable for use in a subterranean wellbore, comprising:
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- an extruded protective material surrounding the fluid barrier; and - an outer protective armor.
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- an extruded protective material surrounding the fluid barrier; and - an outer protective armor.
2. A multiconductor electrical cable for use in a subterranean wellbore, comprising:
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- a tape of protective material surrounding the fluid barrier; and - an outer protective armor.
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- a tape of protective material surrounding the fluid barrier; and - an outer protective armor.
3. A multiconductor electrical cable for use in a subterranean wellbore, comprising:
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- a non-braided material surrounding the fluid barrier; and - an outer protective armor.
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor;
- a fluid barrier surrounding the insulating material;
- a non-braided material surrounding the fluid barrier; and - an outer protective armor.
4. A multiconductor electrical cable of Claim 3 wherein the insulating material is selected from the group consisting of tapes and extruded layers of ethylene propylene diene methylene, ethylene propylene rubber, polychloroprene, fluroelastomers, polypropylene, polyethylene, polyimide, polyether, and copolymers, mixtures, blends and alloys thereof.
5. A multiconductor electrical cable of Claim 4 wherein the polyether insulating material is selected from the group consisting of polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetherketoneetherketoneketone (PEKEKK), and mixtures, blends and alloys thereof.
6. A multiconductor electrical cable of Claim 3 wherein the fluid barrier is selected from the group consisting of extruded layers of lead and alloys thereof.
7. A multiconductor electrical cable of Claim 3 wherein the non-braided material includes at least one thread of semi-conducting material.
8. A multiconductor electrical cable of Claim 3 wherein the non-braided material is selected from the group consisting of fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof.
9. A multiconductor electrical cable of Claim 3 and further comprising a jacket of elastomeric material surrounding the non-braided material.
10. A multiconductor electrical cable of Claim 9 wherein the jacket of elastomeric material is selected from the group consisting of nitrile rubber, ethylene propylene, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, polyethylene, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof.
11. A multiconductor electrical cable for use in a subterranean wellbore, comprising:
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor, the insulating material selected from the group consisting of tapes and extruded layers of ethylene propylene diene methylene, ethylene propylene rubber, polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof;
- a metallic fluid barrier surrounding the insulating material selected from the group consisting of extruded layers of lead and alloys thereof;
- a non-braided material surrounding the metallic fluid barrier selected from the group consisting of fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof; and - an outer protective armor.
- at least one electrical conductor;
- at least one layer of insulating material surrounding the at least one electrical conductor, the insulating material selected from the group consisting of tapes and extruded layers of ethylene propylene diene methylene, ethylene propylene rubber, polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof;
- a metallic fluid barrier surrounding the insulating material selected from the group consisting of extruded layers of lead and alloys thereof;
- a non-braided material surrounding the metallic fluid barrier selected from the group consisting of fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof; and - an outer protective armor.
12 12. A method of making a multiconductor electrical cable, comprising:
(a) surrounding at least one electrical conductor with at least one layer of insulating material;
(b) surrounding the insulating material with a fluid barrier;
(c) surrounding the fluid barrier with a non-braided material; and (d) surrounding the at least one electrical conductor with an outer protective armor.
(a) surrounding at least one electrical conductor with at least one layer of insulating material;
(b) surrounding the insulating material with a fluid barrier;
(c) surrounding the fluid barrier with a non-braided material; and (d) surrounding the at least one electrical conductor with an outer protective armor.
13. The method of Claim 12 wherein the insulating material is heat extruded onto the at least one electrical conductor.
14. The method of Claim 13 wherein the insulating material is selected from the group consisting of ethylene propylene diene methylene, ethylene propylene rubber, polychloroprene, polyimide, fluroelastomers, polypropylene, polyethylene, polyether, and copolymers, mixtures, blends and alloys thereof.
15. The method of Claim 12 wherein the metallic fluid barrier is heat extruded onto the insulating material.
16. The method of Claim 15 wherein the metallic fluid barrier is selected from the group consisting of lead and alloys thereof.
17. The method of Claim 12 wherein a tape of the non-braided material is spirally wrapped around the metallic fluid barrier.
18. The method of Claim 12 wherein a tape of the non-braided material is longitudinally wrapped around the metallic fluid barrier.
19. The method of Claim 18 and further comprising sealing a seam of the tape of non-braided material by applying heat thereto.
20. The method of Claim 18 and further comprising heat extruding the metallic fluid barrier to surround the insulating material, and wrapping a tape of non-braided material around the metallic fluid barrier so that residual heat therein will seal a seam of the tape of non-braided material.
21. The method of Claim 12 wherein the non-braided material is selected from the group consisting of fiberglass, nylon, ethylene propylene copolymer, ethylene vinyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene propylene diene methylene terpolymer, polychloroprene, polyolefin elastomer, and copolymers, mixtures, blends and alloys thereof.
22. The method of Claim 12 wherein the non-braided material includes at least one thread of semi-conductive material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88175597A | 1997-06-24 | 1997-06-24 | |
| US08/881,755 | 1997-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2241578A1 true CA2241578A1 (en) | 1998-12-24 |
Family
ID=25379141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2241578 Abandoned CA2241578A1 (en) | 1997-06-24 | 1998-06-23 | Multiconductor electrical cable |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0887807A1 (en) |
| CA (1) | CA2241578A1 (en) |
| NO (1) | NO982831L (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1094194A3 (en) * | 1999-10-21 | 2002-01-23 | Camco International Inc. | Coiled tubing with an electrical cable for a down-hole pumping system and methods for manufacturing and installing such a system |
| GB2480452B (en) * | 2010-05-18 | 2014-10-08 | Tyco Electronics Ltd Uk | High temperature insulated wire or cable |
| FR2982993B1 (en) * | 2011-11-23 | 2014-09-19 | Axon Cable Sa | HIGH VOLTAGE ELECTRIC CABLE ADAPTED TO EXTREME CONDITIONS |
| CN104485163A (en) * | 2014-12-19 | 2015-04-01 | 河北华通线缆集团有限公司 | High-temperature submersible oil pump cable and manufacturing process thereof |
| WO2016191508A1 (en) * | 2015-05-28 | 2016-12-01 | Schlumberger Technology Corporation | Lead alloy tape barrier |
| US11562834B2 (en) | 2017-10-03 | 2023-01-24 | Schlumberger Technology Corporation | Lead alloy barrier tape splice for downhole power cable |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125018U (en) * | 1983-02-07 | 1984-08-23 | 古河電気工業株式会社 | Rubber, plastic insulated power cable |
| DE3376285D1 (en) * | 1983-04-23 | 1988-05-19 | Mitsubishi Cable Ind Ltd | Shielding tape and electric cables using same |
| US4780574A (en) * | 1987-04-16 | 1988-10-25 | Hubbell Incorporated | Lead sheathed power cable |
| US5300733A (en) * | 1992-11-30 | 1994-04-05 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
| US5414217A (en) * | 1993-09-10 | 1995-05-09 | Baker Hughes Incorporated | Hydrogen sulfide resistant ESP cable |
-
1998
- 1998-02-25 EP EP98301353A patent/EP0887807A1/en not_active Withdrawn
- 1998-06-19 NO NO982831A patent/NO982831L/en unknown
- 1998-06-23 CA CA 2241578 patent/CA2241578A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| NO982831D0 (en) | 1998-06-19 |
| EP0887807A1 (en) | 1998-12-30 |
| NO982831L (en) | 1998-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8113273B2 (en) | Power cable for high temperature environments | |
| CA2417067C (en) | Electrical cable and method | |
| US6901968B2 (en) | Fluid conduit | |
| EP3334967B1 (en) | An assembly comprising an end-fitting and an unbonded flexible pipe | |
| CA2241639C (en) | Non-metallic armor for electrical cable | |
| US9543059B2 (en) | Subsea umbilical | |
| CA2451587C (en) | Conductor system | |
| US7285726B2 (en) | Subsea power cable | |
| US4665281A (en) | Flexible tubing cable system | |
| US5894104A (en) | Coax-slickline cable for use in well logging | |
| US10606005B1 (en) | Optical cables having an inner sheath attached to a metal tube | |
| US3551586A (en) | Shielded electrical cable | |
| US20110278062A1 (en) | Electrical cable with outer jacket bonded from conductor to outer jacket | |
| US8069879B2 (en) | Hydrocarbon application hose | |
| EP0887807A1 (en) | Multiconductor electrical cable | |
| US8041165B2 (en) | System, method and apparatus for power transmission cable with optical fiber for downhole tool in subterranean applications | |
| Powers | The basics of power cable | |
| US4571450A (en) | Moisture impervious power cable and conduit system | |
| EP0924711A2 (en) | Multiconductor electrical cable | |
| EP0880147A1 (en) | Multiconductor electrical cable | |
| US3413408A (en) | Electric cable for high temperature operation | |
| EP3930129A1 (en) | Intermediate connection structure of power cable | |
| CA2226530C (en) | Fluid line with integral conductor | |
| CN211427922U (en) | Anti-interference armored signal cable | |
| EP4068541A1 (en) | Cable conduit for cable line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |