JP2016192259A - High-temperature and high-pressure cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-temperature and high-pressure cable which can be used without causing corrosion and the like even under a high-temperature and high-pressure environment and a corrosive environment.SOLUTION: A high-temperature and high-pressure cable 1 comprises: at least one wire 20; insulating layers (inter-wire layer 30 and outside insulating layer 50) having insulating performance and formed with at least one of high temperature-resistant fiber and high temperature-resistant powder, the insulating layers provided around the wire 20; and a metal pipe 60 provided to cover the peripheries of the wire 20 and insulating layers.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high-temperature and high-pressure cable.

  2. Description of the Related Art In recent years, high-temperature and high-pressure sensors (for example, high-temperature and high-pressure sensors) that can be used in a high-temperature and high-pressure environment in the underground or the seabed have been developed for investigation of underground resources and seabed resources. Along with this, development of high-temperature and high-pressure cables that can be used in a high-temperature and high-pressure environment is also underway. This high-temperature high-pressure cable is connected to a high-temperature high-pressure sensor embedded in the basement, for example, to supply power to the high-temperature high-pressure sensor, or the detection result of the high-temperature high-pressure sensor (temperature or pressure detection result) Is used to transmit a signal indicating.

  Patent Documents 1 and 2 below disclose high-temperature and high-pressure cables in which wires are arranged around a multi-core cable core so that disconnection and crushing do not occur even when subjected to tension. These high-temperature and high-pressure cables disclosed in Patent Documents 1 and 2 have a double structure in which the wires arranged around the multicore cable core are composed of an inner wire and an outer wire. Since the outer wire is wound in opposite directions, there is an advantage that twisting hardly occurs.

  Further, in the high-temperature and high-pressure cable disclosed in the following Patent Document 1, a creep layer is provided by providing a stop layer using a high-strength and heat-resistant polymer between a multicore cable core and surrounding wires. And stress resistance related to cables. In addition, as said polymer, PEEK (PolyEtherEtherKetone: Polyetheretherketone), PEK (PolyEtherKetone: Polyetherketone), PK (PolyKetone: Polyketone), PAEK (PolyArylEtherKetone: Polyaryletherketone) etc. are mentioned.

  Further, in the high-temperature and high-pressure cable disclosed in Patent Document 2 below, pressure resistance is improved by filling a gap between multi-core cable cores. Examples of the filler filled in the gap between the multi-core cable cores include ceramic putty, fluorine elastomer, fluorinated grease and oil.

International Publication No. 2011/156659 US Patent No. 7,009113

  Incidentally, since the high-temperature and high-pressure cables disclosed in Patent Documents 1 and 2 described above use resin, the heat-resistant temperature is about 300 ° C. For this reason, for example, the cables for high-temperature and high-pressure disclosed in Patent Documents 1 and 2 described above in an environment where the temperature exceeds 300 ° C. such as volcanoes (including submarine volcanoes), high-temperature and high-pressure (HPHT) storage tanks, and supercritical storage tanks There is a problem that it is difficult to use.

In addition, since the high-temperature and high-pressure cables disclosed in Patent Documents 1 and 2 described above use resin, there is a problem that they cannot be used even in corrosive environments. For example, when the high-temperature and high-pressure cables disclosed in Patent Documents 1 and 2 described above are used in a liquid containing sulfur sulfide (H ₂ S) or in a supercritical fluid (water), There is a problem in that the resin used is corroded and the liquid may permeate the high-temperature and high-pressure cable and cause a short circuit.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a high-temperature and high-pressure cable that can be used without causing corrosion or the like even in a high-temperature and high-pressure environment and a corrosive environment. To do.

In order to solve the above problems, a high temperature and high pressure cable is formed using at least one wiring (20, 20a, 20b) and at least one of an insulating high temperature resistant fiber and high temperature resistant powder, And an insulating layer (30, 50) provided around the metal layer and a metal tube (60) provided so as to cover the wiring and the insulating layer.
In the high-temperature and high-pressure cable of the present invention, the insulating layer is formed using ceramic fiber, glass fiber, ceramic powder, glass powder, or ceramic fiber or glass fiber and ceramic powder or glass powder. It is characterized by that.
In addition, the high-temperature and high-pressure cable of the present invention is characterized by including wires (70, 80, 90) provided along at least one of the inner periphery and the outer periphery of the metal tube.
In the high-temperature and high-pressure cable according to the present invention, the wire is provided along the first wire (80a, 90a) provided along at least one of the inner periphery or the outer periphery of the metal tube, and the first wire. The second wire (80b, 90b) is formed.
The high-temperature and high-pressure cable according to the present invention is characterized in that the insulating layer is in close contact with at least one of the inner periphery of the metal tube and the wiring by the restriction of the metal tube.
The high-temperature and high-pressure cable according to the present invention includes a jacket layer (40) provided between the wiring and the metal tube so as to cover the periphery of the wiring.
In the high-temperature and high-voltage cable of the present invention, the wiring is formed by using the central conductor (21) and at least one of an insulating high-temperature resistant fiber and high-temperature resistant powder, and is coated on the outer periphery of the central conductor. The wiring insulation layer (22) and a wiring jacket layer (23) coated on the outer periphery of the wiring insulation layer are provided.
In addition, the high-temperature and high-pressure cable of the present invention includes a wiring shield layer (24) provided in the wiring insulating layer between the center conductor and the wiring jacket layer.
In the high-temperature and high-pressure cable of the present invention, the wiring is formed using a plurality of conductors (101), at least one of an insulating high-temperature resistant fiber and high-temperature resistant powder, and the outer periphery of each of the conductors. A plurality of coated first wiring insulating layers (102), a plurality of first wiring jacket layers (103) coated on the outer periphery of each of the first wiring insulating layers, an insulating high temperature resistant fiber, and a high temperature A second wiring insulating layer (110) formed using at least one of the resistant powder and provided around the plurality of first wiring jacket layers, and a second wiring provided around the second wiring insulating layer And a jacket layer (23).
In addition, the high-temperature and high-pressure cable of the present invention is characterized by including at least one metal wire (10) provided at the center of the cable.

  According to the present invention, an insulating layer formed using at least one of an insulating high temperature resistant fiber and high temperature resistant powder is provided around the wiring, and a metal tube is provided so as to cover the wiring and the insulating layer. Therefore, there is an effect that it can be used without causing corrosion or the like even in a high temperature / high pressure environment and a corrosive environment. In addition, it has resistance against pulling by a wire and a metal tube, and there is an effect that the cable is not cut even in an application in which the cable is used in the vertical direction.

It is sectional drawing which shows the cable for high temperature / high pressure by 1st Embodiment of this invention. It is sectional drawing which shows the cable for high temperature / high pressure by 2nd Embodiment of this invention. It is sectional drawing which shows the cable for high temperature / high pressure by 3rd Embodiment of this invention. It is sectional drawing which shows the cable for high temperature / high pressure by 4th Embodiment of this invention. It is sectional drawing which shows the cable for high temperature / high pressure by 5th Embodiment of this invention. It is sectional drawing which shows the cable for high temperature / high pressure by 6th Embodiment of this invention. It is sectional drawing which shows the modification of the wiring used with the cable for high temperature / high pressure by embodiment of this invention.

  Hereinafter, a high-temperature and high-pressure cable according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a high-temperature and high-pressure cable according to a first embodiment of the present invention. As shown in FIG. 1, the high-temperature and high-pressure cable 1 of the present embodiment includes a metal wire 10, a plurality of wirings 20, an inter-wiring layer 30 (insulating layer), an outer jacket layer 40 (jacket layer), and an outer insulating layer 50 (insulating). Layer), and a multi-core cable including the metal tube 60. Such a high-temperature and high-pressure cable 1 can be used in a high-temperature and high-pressure environment, and transmits electric power and various signals via a plurality of wires 20.

  The metal wire 10 is a wire for improving the strength (tension resistance) of the high-temperature and high-pressure cable 1, and is provided at the center of the cross-section of the high-temperature and high-pressure cable 1. As the metal wire 10, for example, a wire formed of stainless steel (SUS: Steel Use Stainless) can be used. Note that the outer diameter of the metal wire 10 is the same (or substantially the same) as the outer diameter of the wiring 20.

  The wiring 20 is a coaxial wire used for transmission of electric power and various signals, and a plurality of wirings 20 are arranged at equal intervals along the outer periphery of the metal wire 10. Specifically, in the example shown in FIG. 1, six wirings 20 whose outer diameters are the same (or substantially the same) as the outer diameters of the metal wires 10 are in contact with the metal wires 10 and adjacent ones. In this state, the metal wires 10 are arranged at equal intervals along the outer periphery.

  As a result, in the cross section of the high-temperature and high-pressure cable 1, all the figures connecting the center of the metal wire 10 and the center of any two adjacent wires 20 are equilateral triangles. The book wiring 20 is in a state of being closely packed in the cross section of the high-temperature and high-pressure cable 1. The reason for this is to prevent the wiring 20 from being broken or crushed even when the high-temperature and high-pressure cable 1 is used in a high-pressure environment or is subjected to tension.

  Each of the wirings 20 includes a conductor 21 (center conductor), a wiring insulating layer 22, and a wiring jacket layer 23. The conductor 21 is, for example, a stranded wire obtained by twisting a plurality of annealed copper wires or silver-plated annealed copper wires, or a single copper wire or silver-plated copper wire. However, the conductor 21 may be a conductor, and other metals (for example, an alloy containing a refractory metal such as Ni, W, Mo, etc., SUS, etc.) may be used depending on the application. The wiring insulating layer 22 is made of an insulating high temperature resistant fiber such as ceramic fiber or glass fiber, an insulating high temperature resistant powder such as ceramic powder or glass powder, or a mixture of high temperature resistant fiber and high temperature resistant powder. The outer periphery of the conductor 21 is formed. The reason why such a high temperature resistant fiber or high temperature resistant powder is used for the wiring insulating layer 22 is to dramatically improve the heat resistant temperature as compared with the conventional case while insulating the conductor 21. When using high temperature resistant powder, it is necessary to press fit the high temperature resistant powder and squeeze the metal tube 60.

  The wiring jacket layer 23 is a braided wire in which, for example, an annealed copper wire, tin-plated annealed copper wire, or silver-plated annealed copper wire is woven, and is coated on the outer periphery of the wiring insulating layer 22. However, the wiring jacket layer 23 is a conductor as long as the shape of the inner conductor 21 and the wiring insulating layer 22 can be maintained, and other metal (for example, Ni, W, Mo etc.) An alloy containing a metal, SUS, or the like may be used. The wiring jacket layer 23 is provided in order to maintain the shape of the wiring insulating layer 22. In addition, the wiring jacket layer 23 also serves as a shield that prevents the entry of noise flying from the outside of the wiring 20.

  The inter-wiring layer 30 is a layer provided around the wiring 20 (between the wirings 20), and includes an inter-wiring inner layer 31 and an inter-wiring outer layer 32. The inter-wiring inner layer 31 uses a high temperature resistant fiber having insulation properties such as ceramic fibers or glass fibers, a high temperature resistant powder having insulation properties such as ceramic powder or glass powder, or a mixture of high temperature resistant fibers and high temperature resistant powders. And is provided between the metal wire 10 and the wiring 20. The inter-wiring outer layer 32 uses a high-temperature resistant fiber having insulating properties such as ceramic fibers or glass fibers, a high-temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of high-temperature resistant fibers and high-temperature resistant powder. And is provided between the wiring 20 and the outer jacket layer 40.

  The inter-wiring layer 30 including the inter-wiring inner layer 31 and the inter-wiring outer layer 32 is provided around the wiring 20 to prevent the disconnection or crushing of the high-temperature and high-pressure cable 1 by filling a gap formed between the wirings 20. It is to do. The inter-wiring outer layer 32 is also provided to insulate the wiring jacket layer 23 and the outer jacket layer 40 of the wiring 20. In addition, high-temperature resistant fibers are used for both the inter-wiring inner layer 31 and the inter-wiring outer layer 32, which is to dramatically improve the heat-resistant temperature as compared with the prior art.

  In the example shown in FIG. 1, since the adjacent wirings 20 are in contact with each other, the inter-wiring layer 30 is separated into an inter-wiring inner layer 31 and an inter-wiring outer layer 32. When the adjacent wirings 20 are not in contact with each other (for example, when the outer diameter of the wiring 20 is smaller than the outer diameter of the metal wire 10), the inner inter-wiring layer 31 and the outer inter-wiring line The layer 32 is connected via the gap between the wirings 20. In this state, the wiring jacket layer 23 of each wiring 20 is insulated by the inter-wiring layer 30.

  The outer jacket layer 40 is a braided wire in which, for example, an annealed copper wire, a tin-plated annealed copper wire, or a silver-plated annealed copper wire is woven, and the wiring is formed so as to cover the periphery of the metal wire 10, the plurality of wires 20, and the inter-wiring layer 30 20 and the metal tube 60. However, the wiring jacket layer 40 is a conductor as long as the shape of the internal metal wire 10, the plurality of wirings 20, and the inter-wiring layer 30 can be maintained, and other metals (for example, Ni, W, Mo, etc.) may be used depending on the application. An alloy containing a refractory metal such as SUS or the like may be used. The outer jacket layer 40 is provided to bundle the metal wire 10, the plurality of wirings 20, and the inter-wiring layer 30 together to facilitate the manufacture of the high-temperature and high-pressure cable 1 and to maintain these shapes. . Further, the outer jacket layer 40 can also be used as a shield for preventing mixing of noise flying from the outside of the high-temperature and high-pressure cable 1.

  The outer insulating layer 50 is made of a high temperature resistant fiber having insulation properties such as ceramic fiber or glass fiber, a high temperature resistant powder having insulation property such as ceramic powder or glass powder, or a mixture of high temperature resistant fiber and high temperature resistant powder. The outer jacket layer 40 is formed on the outer periphery. The outer insulating layer 50 is provided to insulate the outer jacket layer 40 and the metal tube 60 from each other. Moreover, the reason why the high temperature resistant fiber is used for the outer insulating layer 50 is to dramatically improve the heat resistant temperature as compared with the conventional case.

The metal tube 60 is provided on the outermost periphery of the high-temperature and high-pressure cable 1 so as to cover the periphery of the metal wire 10, the plurality of wirings 20, the inter-wiring layer 30, the outer jacket layer 40, and the outer insulating layer 50. The metal tube 60 is made of, for example, stainless steel, and a liquid (for example, a liquid containing sulfur sulfide (H ₂ S) or a liquid having corrosive properties such as a supercritical fluid (water)) is used for high temperature and high pressure. It is provided to prevent penetration into the inside of the cable 1. In addition, by using it for the metal pipe 60, the strength (tension resistance) of the high-temperature and high-pressure cable 1 can be improved.

  The metal tube 60 is subjected to a drawing process in which the diameter is reduced by being pressurized in a direction (centripetal direction) toward the center of the high-temperature and high-pressure cable 1. Thereby, the adhesion of the metal wire 10, the plurality of wirings 20, the inter-wiring layer 30, the outer jacket layer 40, and the outer insulating layer 50 provided inside the metal tube 60 is enhanced. This is because the gap in the high-temperature and high-pressure cable 1 is filled to prevent the high-temperature and high-pressure cable 1 from being disconnected or crushed. Another reason is to prevent disconnection of the high temperature resistant fiber caused by the high temperature resistant fiber sliding in the length direction of the high temperature and high pressure cable 1.

  Specifically, the high-temperature resistant fiber forming the wiring insulating layer 22 of the wiring 20 is formed on the conductor 21 and the wiring jacket layer 23 to such an extent that the length of the high-temperature high-pressure cable 1 does not slip due to the drawing of the metal tube 60. It is in close contact. Further, the high-temperature resistant fiber forming the inter-wiring layer 30 has the metal wire 10, the wiring jacket layer 23 of the wiring 20, and the wiring jacket layer 23 of the wiring 20 to such an extent that the length of the high-temperature / high-pressure cable 1 does not slip due to the drawing of the metal tube 60. The outer jacket layer 40 is in close contact. Further, the high temperature resistant fiber forming the outer insulating layer 50 is formed between the outer jacket layer 40 and the inner circumference of the metal tube 60 to such an extent that the length of the high temperature and high pressure cable 1 does not slip due to the restriction of the metal tube 60. It is in close contact. The metal tube 60 has a thickness of about several tens of μm to several mm, for example, and has an outer diameter of about several mm to several tens of cm, for example.

  The high-temperature and high-voltage cable 1 having the above-described configuration includes a high-temperature resistant fiber, ceramic powder, or glass powder in which the wiring insulating layer 22, the inter-wiring layer 30, and the outer insulating layer 50 of the wiring 20 have insulating properties such as ceramic fibers or glass fibers. Or the like, or a mixture of high temperature resistant fiber and high temperature resistant powder. When glass fiber is used as the high temperature resistant fiber, the heat resistant temperature can be about 450 to 600 ° C., and when ceramic fiber is used as the high temperature resistant fiber, the heat resistant temperature can be 1000 ° C. or higher. it can. Thus, the high temperature and high pressure cable 1 of the present embodiment can dramatically improve the heat resistant temperature compared to the conventional high temperature and high pressure cable (heat resistant temperature: about 300 ° C.) in which resin is used.

  Further, the high-temperature and high-pressure cable 1 of the present embodiment is provided with a metal tube 60 so as to cover the periphery of the metal wire 10, the plurality of wirings 20, the inter-wiring layer 30, the outer jacket layer 40, and the outer insulating layer 50. Therefore, it is possible to prevent a liquid (for example, a liquid containing sulfur sulfide or a liquid having corrosive properties such as a supercritical fluid (water)) from penetrating into the cable 1 for high temperature and high pressure. Thus, it can be used without causing corrosion even in a high-temperature and high-pressure environment and a corrosive environment.

  In addition, the high-temperature and high-pressure cable 1 of the present embodiment is provided with the metal wire 10 at the center and the metal tube 60 at the outermost periphery. Can be improved. Thereby, even if the high temperature and high pressure cable 1 is used in the vertical direction (even when the high temperature and high pressure cable 1 is hung over a long distance), the conductor 21 of the wiring 20 and the wiring insulating layer 22 of the wiring 20 are used. It is possible to prevent the high-temperature resistant fibers forming the inter-wiring layer 30 and the outer insulating layer 50 from being cut.

[Second Embodiment]
FIG. 2 is a cross-sectional view showing a high-temperature and high-pressure cable according to a second embodiment of the present invention. In FIG. 2, the same members as those shown in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 2, the high-temperature and high-pressure cable 2 of the present embodiment has a configuration in which the metal wire 10 of the high-temperature and high-pressure cable 1 shown in FIG. That is, the high-temperature and high-pressure cable 2 has a configuration in which the wiring 20 is provided at the center in the cross section.

  Here, the wiring 20 provided in the central portion of the cross section of the high-temperature and high-pressure cable 2 is the same as the other wiring 20 and is a coaxial electric wire including the conductor 21, the wiring insulating layer 22, and the wiring jacket layer 23. . The wiring 20 provided in the central portion has the same outer diameter as (or substantially the same as) the outer diameter of the other wiring 20. For this reason, the other wirings 20 are arranged at equal intervals along the outer periphery of the wiring 20 provided in the central part, in contact with the wirings 20 provided in the central part and adjacent to each other. . Accordingly, the seven wirings 20 shown in FIG. 2 are in the state of being closely packed in the cross section of the high-temperature and high-pressure cable 2, so that the wiring 20 can be prevented from being disconnected or crushed. .

  The high-temperature and high-pressure cable 2 having the above-described configuration has a configuration in which the metal wire 10 of the high-temperature and high-pressure cable 1 shown in FIG. 1 is replaced with the wiring 20, so that the number of the wirings 20 included in the high-temperature and high-pressure cable 2 can be increased. it can. In the high temperature and high pressure cable 2 of the present embodiment, the metal wire 10 of the high temperature and high pressure cable 1 shown in FIG. 1 is omitted, so that most of the tension related to the high temperature and high pressure cable 2 is provided on the outermost periphery. The metal tube 60 is applied. In order to improve the strength (tension resistance) of the high-temperature and high-pressure cable 2 as much as possible, it is desirable to reduce the diameter of the metal tube 60 and bring the internal structure into close contact.

  The high-temperature and high-pressure cable 2 of the present embodiment is similar to the high-temperature and high-pressure cable 1 shown in FIG. 1 in that the wiring insulating layer 22, the inter-wiring layer 30, and the outer insulating layer 50 of the wiring 20 are ceramic fibers or glass. It is formed using a high temperature resistant fiber having insulating properties such as fibers, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of high temperature resistant fibers and high temperature resistant powder. For this reason, compared with the conventional high-temperature and high-pressure cable (heat-resistant temperature: about 300 ° C.) in which resin is used, the heat-resistant temperature can be dramatically improved. Further, since the high temperature and high pressure cable 2 of the present embodiment can prevent the liquid from penetrating into the high temperature and high pressure cable 2, corrosion occurs even in a high temperature and high pressure environment and a corrosive environment. It is possible to use without. Further, the high-temperature and high-pressure cable 2 of the present embodiment has high tension resistance.

[Third Embodiment]
FIG. 3 is a cross-sectional view showing a high-temperature and high-pressure cable according to a third embodiment of the present invention. In FIG. 3 as well, the same members as those shown in FIG. As shown in FIG. 3, the high-temperature and high-pressure cable 3 of this embodiment has a configuration in which the wiring 20 of the high-temperature and high-pressure cable 1 shown in FIG. 1 is replaced with a wiring 20a.

  In the wiring 20a, a wiring shield layer 24 is provided on the wiring insulating layer 22 between the conductor 21 and the wiring jacket layer 23 of the wiring 20 shown in FIG. Specifically, in the wiring 20a, the outer periphery of the conductor 21 is covered with the wiring inner insulating layer 22a, the outer periphery of the wiring inner insulating layer 22a is covered with the wiring shield layer 24, and the outer periphery of the wiring shield layer 24 is the outer wiring insulating layer 22b. The outer periphery of the wiring outer insulating layer 22b is covered with the wiring jacket layer 23.

  The wiring inner insulating layer 22a and the wiring outer insulating layer 22b form the wiring insulating layer 22, and have a high temperature resistant fiber having an insulating property such as ceramic fiber or glass fiber, and a high temperature having an insulating property such as ceramic powder or glass powder. It is formed using a resistant powder or a mixture of a high temperature resistant fiber and a high temperature resistant powder. Similar to the wiring jacket layer 23, the wiring shield layer 24 is a braided wire in which, for example, an annealed copper wire, tin-plated annealed copper wire, or silver-plated annealed copper wire is knitted. However, the wiring shield layer 24 is a conductor as long as the shape of the inner conductor 21 and the inner wiring insulating layer 22a can be maintained, and other metal (for example, Ni, W, Mo, etc.) may be used depending on the application. An alloy containing a melting point metal, SUS, or the like may be used. As described above, the wiring 20 a is provided with two metal layers of the wiring jacket layer 23 and the wiring shield layer 24.

  Since the high-temperature and high-pressure cable 3 having the above-described configuration has a configuration in which the wiring 20 of the high-temperature and high-pressure cable 1 shown in FIG. 1 is replaced with the wiring 20a, the shielding effect can be enhanced, and noises flying from the outside of the wiring 20a can be reduced. Mixing can be effectively prevented. In addition, since the wiring 20a is provided with two metal layers of the wiring jacket layer 23 and the wiring shield layer 24, the shape can be maintained more than the wiring 20 shown in FIG.

  Note that the high-temperature and high-pressure cable 3 of this embodiment is similar to the high-temperature and high-pressure cable 1 shown in FIG. 1 in that the wiring insulating layer 22, the inter-wiring layer 30, and the outer insulating layer 50 of the wiring 20 a are made of ceramic fiber or glass. It is formed using a high temperature resistant fiber having insulating properties such as fibers, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of high temperature resistant fibers and high temperature resistant powder. For this reason, compared with the conventional high-temperature and high-pressure cable (heat-resistant temperature: about 300 ° C.) in which resin is used, the heat-resistant temperature can be dramatically improved. Further, since the high temperature and high pressure cable 3 of the present embodiment can prevent the liquid from penetrating into the high temperature and high pressure cable 3, corrosion occurs even in a high temperature and high pressure environment and a corrosive environment. It is possible to use without. Further, the high-temperature and high-pressure cable 3 of the present embodiment has high tension resistance.

[Fourth Embodiment]
FIG. 4 is a cross-sectional view showing a high temperature and high pressure cable according to a fourth embodiment of the present invention. In FIG. 4 as well, the same members as those shown in FIG. As shown in FIG. 4, the high-temperature and high-pressure cable 4 of the present embodiment has a configuration in which the outer insulating layer 50 of the high-temperature and high-pressure cable 1 shown in FIG. 1 is replaced with an in-tube wire 70 (wire).

  The in-pipe wires 70 are wires for preventing the disconnection of the high-temperature and high-pressure cable 4, and a plurality of the in-pipe wires 70 are arranged along the outer periphery of the outer jacket layer 40 (along the inner periphery of the metal tube 60). As this in-pipe wire 70, the wire formed, for example with stainless steel can be used. The in-tube wire 70 may be wound, for example, clockwise in the drawing, or may be wound in the counterclockwise direction.

  The high-temperature high-pressure cable 4 having the above-described configuration has a configuration in which the outer insulating layer 50 of the high-temperature high-pressure cable 1 shown in FIG. That is, in the high-temperature and high-pressure cable 1 shown in FIG. 1, when bending occurs, the outer insulating layer 50 and the inner circumference of the metal tube 60 are rubbed, and the high-temperature resistant fiber forming the outer insulating layer 50 may be disconnected. Can be considered. On the other hand, in the high-temperature and high-pressure cable 4 of the present embodiment, the inner wire 70 is provided in place of the outer insulating layer 50, so that even if rubbing occurs between the inner periphery of the metal tube 60, the cable is disconnected. There is no.

  In addition, since the high-temperature and high-pressure cable 4 having the above-described configuration is configured to include the in-tube wire 70, the inner structure of the outer jacket layer 40 is unlikely to be deformed. Further, the high-temperature high-pressure cable 4 having the above-described configuration is provided with the pipe wire 70 in addition to the metal wire 10 provided at the center and the metal pipe 60 provided at the outermost periphery. Strength (tension resistance) can be further improved.

  In the high-temperature and high-pressure cable 4 of the present embodiment, the wiring insulating layer 22 and the inter-wiring layer 30 of the wiring 20 have insulating properties such as ceramic fiber or glass fiber as in the high-temperature and high-pressure cable 1 shown in FIG. It is formed using a high temperature resistant fiber having high insulation resistance, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of a high temperature resistant fiber and a high temperature resistant powder. For this reason, compared with the conventional high-temperature and high-pressure cable (heat-resistant temperature: about 300 ° C.) in which resin is used, the heat-resistant temperature can be dramatically improved. Moreover, since the high temperature / high pressure cable 4 of the present embodiment can prevent the liquid from penetrating into the high temperature / high pressure cable 4, corrosion occurs even in a high temperature / high pressure environment and a corrosive environment. It is possible to use without. Further, the high-temperature and high-pressure cable 4 of the present embodiment has high tension resistance.

[Fifth Embodiment]
FIG. 5 is a cross-sectional view showing a high temperature and high pressure cable according to a fifth embodiment of the present invention. In FIG. 5, the same members as those shown in FIG. 2 are denoted by the same reference numerals. As shown in FIG. 5, the high temperature and high pressure cable 5 of the present embodiment has a configuration in which the outer insulating layer 50 of the high temperature and high pressure cable 2 shown in FIG. 2 is replaced with an in-pipe armored wire 80 (wire).

  The in-pipe armored wire 80 is a wire for preventing disconnection of the high-temperature and high-pressure cable 5 and includes an inner wire 80a (first wire) and an outer wire 80b (second wire). A plurality of inner wires 80a are arranged along the outer periphery of the outer jacket layer 40, and a plurality of outer wires 80b are arranged along the outer periphery of the inner wire 80a (along the inner periphery of the metal tube 60). The inner wire 80a and the outer wire 80b are wound in opposite directions to make it difficult to twist the high-temperature and high-pressure cable 5. As the inner wire 80a and the outer wire 80b forming the in-tube armored wire 80, for example, a wire formed of stainless steel can be used.

  The high-temperature and high-pressure cable 5 having the above-described configuration has a configuration in which the outer insulating layer 50 of the high-temperature and high-pressure cable 2 shown in FIG. Therefore, similarly to the high-temperature and high-pressure cable 4 shown in FIG. 4, the disconnection of the high-temperature resistant fiber can be prevented, the inner structure is less likely to be deformed than the outer jacket layer 40, and the strength (tension resistance) is increased. Can be improved. Since the strength is improved by the in-pipe armored wire 80, for example, the wiring 20 can be provided instead of the metal wire 10 provided in the high-temperature and high-pressure cable 4 shown in FIG.

  In the high-temperature and high-pressure cable 5 of the present embodiment, the wiring insulating layer 22 and the inter-wiring layer 30 of the wiring 20 have insulating properties such as ceramic fiber or glass fiber as in the high-temperature and high-pressure cable 2 shown in FIG. It is formed using a high temperature resistant fiber having high insulation resistance, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of a high temperature resistant fiber and a high temperature resistant powder. For this reason, compared with the conventional high-temperature and high-pressure cable (heat-resistant temperature: about 300 ° C.) in which resin is used, the heat-resistant temperature can be dramatically improved. Moreover, since the high temperature / high pressure cable 5 of the present embodiment can prevent the liquid from penetrating into the high temperature / high pressure cable 5, corrosion occurs even in a high temperature / high pressure environment and a corrosive environment. It is possible to use without. Further, the high-temperature and high-pressure cable 5 of the present embodiment has high tension resistance.

[Sixth Embodiment]
FIG. 6 is a cross-sectional view showing a high temperature and high pressure cable according to a sixth embodiment of the present invention. In FIG. 6, the same members as those shown in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 6, the high-temperature and high-pressure cable 6 of the present embodiment has a configuration in which an extra-armored wire 90 (wire) is provided on the outer periphery of the metal tube 60 of the high-temperature and high-pressure cable 1 shown in FIG.

  The extra-arm armored wire 90 is a wire for preventing disconnection of the high-temperature and high-pressure cable 6 and includes an inner wire 90a (first wire) and an outer wire 90b (second wire). A plurality of inner wires 90a are arranged along the outer periphery of the metal tube 60, and a plurality of outer wires 90b are arranged along the outer periphery of the inner wire 90a. The inner wire 90a and the outer wire 90b are wound in opposite directions to make it difficult for the high-temperature and high-pressure cable 6 to be twisted. As the inner wire 90a and the outer wire 90b that form the extra-arm armored wire 90, for example, a wire formed of stainless steel can be used.

  The high-temperature high-pressure cable 6 having the above-described configuration has a configuration in which an extra-arm armored wire 90 is provided on the outer periphery of the metal tube 60 of the high-temperature high-pressure cable 1 shown in FIG. . Further, since the armored wire 90 outside the tube is provided on the outer periphery of the metal tube 60, for example, the rubbing between the metal tube 60 and the inner wall of the hole that occurs when the high temperature and high pressure cable 6 is passed through the hole in the ground is prevented. And the metal tube 60 can be protected.

  The high-temperature and high-pressure cable 6 of the present embodiment is similar to the high-temperature and high-pressure cable 1 shown in FIG. It is formed using a high temperature resistant fiber having insulating properties such as fibers, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of high temperature resistant fibers and high temperature resistant powder. For this reason, compared with the conventional high-temperature and high-pressure cable (heat-resistant temperature: about 300 ° C.) in which resin is used, the heat-resistant temperature can be dramatically improved. Further, since the high temperature and high pressure cable 6 of the present embodiment can prevent the liquid from penetrating into the high temperature and high pressure cable 6, corrosion occurs even in a high temperature and high pressure environment and a corrosive environment. It is possible to use without. Further, the high-temperature and high-pressure cable 6 of the present embodiment has high tension resistance.

  The high-temperature and high-pressure cable according to the embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be freely changed within the scope of the present invention. For example, in the above-described embodiment (excluding the third embodiment), a coaxial cable is used as the wiring 20, but a multi-core wiring 20b shown in FIG.

  FIG. 7 is a cross-sectional view showing a modification of the wiring used in the high-temperature and high-pressure cable according to the embodiment of the present invention. In FIG. 7, only a cross section of one of the plurality of wirings provided in the high temperature and high pressure cable is illustrated. The wiring 20b shown in FIG. 7 includes a plurality of internal wirings 100, an internal wiring inter-layer 110 (second wiring insulating layer), and a wiring jacket layer 23 (second wiring jacket layer).

  Each of the internal wirings 100 is a coaxial electric wire used for transmission of electric power and various signals, and has the same (or almost the same) outer diameter. In the example shown in FIG. 7, one of the seven internal wirings 100 is provided at the center of the wiring 20b. Then, the remaining six internal wirings 100 are in contact with the internal wiring 100 provided in the central part, and adjacent ones are in contact with each other, and are equally spaced along the outer periphery of the internal wiring 100 provided in the central part. Are arranged in As a result, the seven internal wirings 100 are in the closest packed state in the cross section of the wiring 20b, so that the internal wiring 100 can be prevented from being disconnected or crushed.

  Each of the internal wirings 100 includes a conductor 101, an internal wiring insulating layer 102 (first wiring insulating layer), and an internal wiring jacket layer 103 (first wiring jacket layer). The conductor 101 is, for example, a stranded wire obtained by twisting a plurality of annealed copper wires or silver-plated annealed copper wires, or a single copper wire or silver-plated copper wire. However, the conductor 101 may be a conductor, and other metals (for example, an alloy containing a refractory metal such as Ni, W, Mo, etc., SUS, etc.) may be used depending on the application. The internal wiring insulating layer 102 uses a high temperature resistant fiber having insulation properties such as ceramic fiber or glass fiber, a high temperature resistant powder having insulation property such as ceramic powder or glass powder, or a mixture of high temperature resistant fiber and high temperature resistant powder. The outer periphery of the conductor 101 is covered. The internal wiring jacket layer 103 is, for example, a braided wire knitted with an annealed copper wire, tin-plated annealed copper wire, or silver-plated annealed copper wire, and is coated on the outer periphery of the internal wiring insulating layer 102. However, the internal wiring jacket layer 103 is a conductor, and it is sufficient that the shapes of the internal conductor 101 and the internal wiring insulating layer 102 can be maintained, and other metals (for example, Ni, W, Mo, etc. are included depending on the application). An alloy containing a refractory metal, SUS, or the like may be used.

  The inter-internal-wiring layer 110 is a layer provided around the internal wiring 100 (between the internal wirings 100), and includes an inner-inter-wiring inner layer 111 and an inner-inter-wiring outer layer 112. The inner layer 111 between the internal wirings is a high temperature resistant fiber having insulating properties such as ceramic fiber or glass fiber, a high temperature resistant powder having insulating properties such as ceramic powder or glass powder, or a mixture of high temperature resistant fiber and high temperature resistant powder. And is provided between the internal wirings 100. The inter-internal wiring outer layer 112 is made of insulating high temperature resistant fiber such as ceramic fiber or glass fiber, insulating high temperature resistant powder such as ceramic powder or glass powder, or a mixture of high temperature resistant fiber and high temperature resistant powder. Formed between the internal wiring 100 and the wiring jacket layer 23. The wiring jacket layer 23 is the same as the wiring jacket layer 23 shown in FIG. 1, for example.

  Since the wiring 20b having the above-described configuration includes a plurality of internal wirings 100, the number of conductors included in one high-temperature and high-pressure cable can be increased. For example, since the wiring 20b shown in FIG. 7 includes seven conductors 101, for example, if the wiring 20b is used instead of the wiring 20 shown in FIG. 1, the number of conductors included in the high-temperature high-pressure cable is increased seven times. can do. Thus, more types of signals and the like can be transmitted with a single high-temperature and high-pressure cable.

  In the first to sixth embodiments described above, the inter-wiring layer 30 is provided around the wiring 20 (wirings 20a and 20b), and the wiring jacket layer 23 and the outer jacket of the wiring 20 (wirings 20a and 20b) are provided. Layer 40 was electrically insulated. However, when it is not necessary to insulate the wiring jacket layer 23 and the outer jacket layer 40 of the wiring 20 (wirings 20a and 20b), the inter-wiring layer 30 (the inter-wiring inner layer 31 and the inter-wiring outer layer 32) You may form with a metal wire or a metal wire.

  In addition, the high-temperature and high-pressure cables of the above-described embodiments (excluding the second and fifth embodiments) have a configuration in which one metal wire 10 is provided at the center in the cross section. However, a configuration in which a plurality of metal wires corresponding to the metal wire 10 are provided may be employed. By providing a plurality of such metal wires, the strength (tension resistance) of the high-temperature and high-pressure cable can be improved.

DESCRIPTION OF SYMBOLS 10 Metal wire 20 Wiring 20a Wiring 20b Wiring 21 Conductor 22 Wiring insulation layer 23 Wiring jacket layer 24 Wiring shield layer 30 Wiring layer 40 Outer jacket layer 50 Outer insulating layer 60 Metal pipe 70 In-pipe wire 80 In-pipe armored wire 80a Inner wire 80b Outer Wire 90 Outside tube armored wire 90a Inner wire 90b Outer wire 101 Conductor 102 Internal wiring insulating layer 103 Internal wiring jacket layer 110 Inter-wiring layer

Claims (10)

At least one wire;
Formed using at least one of high-temperature resistant fiber and high-temperature resistant powder having insulating properties, and an insulating layer provided around the wiring;
A high-temperature and high-pressure cable, comprising: a metal pipe provided to cover the wiring and the insulating layer.   2. The high temperature according to claim 1, wherein the insulating layer is formed using ceramic fiber, glass fiber, ceramic powder, glass powder, or ceramic fiber or a mixture of glass fiber and ceramic powder or glass powder. High voltage cable.   The high-temperature and high-pressure cable according to claim 1 or 2, further comprising a wire provided along at least one of an inner periphery and an outer periphery of the metal tube. The wire includes a first wire provided along at least one of an inner periphery and an outer periphery of the metal tube;
The high-temperature and high-pressure cable according to claim 3, comprising: a second wire provided along the first wire.   The said insulating layer is closely_contact | adhered to at least one of the inner periphery of the said metal tube, and the said wiring by the aperture_diaphragm | restriction of the said metal tube, The Claim 1 characterized by the above-mentioned. High temperature and high pressure cable.   The high-temperature and high-pressure cable according to any one of claims 1 to 5, further comprising a jacket layer provided between the wiring and the metal tube so as to cover the periphery of the wiring. The wiring includes a central conductor,
A wiring insulating layer formed using at least one of a high temperature resistant fiber having an insulating property and a high temperature resistant powder, and coated on an outer periphery of the central conductor;
The high-temperature and high-pressure cable according to claim 1, further comprising: a wiring jacket layer coated on an outer periphery of the wiring insulating layer.   The high-temperature and high-pressure cable according to claim 7, further comprising a wiring shield layer provided in the wiring insulating layer between the center conductor and the wiring jacket layer. The wiring includes a plurality of conductors,
A plurality of first wiring insulating layers formed using at least one of a high temperature resistant fiber having an insulating property and a high temperature resistant powder and coated on the outer periphery of each of the conductors;
A plurality of first wiring jacket layers coated on the outer periphery of each of the first wiring insulating layers;
A second wiring insulating layer formed around at least one of the plurality of first wiring jacket layers, formed using at least one of a high temperature resistant fiber and a high temperature resistant powder having insulating properties;
The high-temperature and high-pressure cable according to any one of claims 1 to 6, further comprising: a second wiring jacket layer provided around the second wiring insulating layer.   The high-temperature and high-pressure cable according to any one of claims 1 to 9, further comprising at least one metal wire provided at a center portion of the cable.

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