Multifunctional steel pipe sheathed submersible pump cable

Abstract

The present invention relates to the technical field of submersible pump cables, and in particular to a multifunctional steel pipe sheathed submersible pump cable, comprising a communication cable, wherein the outer sheath of the communication cable is provided with a heating lead-in reinforcement structure, and the outer longitudinal sheath of the heating lead-in reinforcement structure is provided with a steel armor outer sheath. An end of the submersible pump cable close to the submersible pump is provided with a connecting structure, and the connecting structure directly connects the steel armor heating copper conductor and the steel armor outer sheath. The present invention forms a heating circuit for the entire steel armor outer sheath while supplying power to the submersible pump motor by installing the steel armor heating lead-in structure and the submersible pump lead-in wire together, and connecting the steel armor heating lead-in structure to the steel armor outer sheath through the connecting structure. The heat generated by the steel armor outer sheath achieves the effect of clearing and preventing wax in the oil pipe, and is combined with the communication cable and the high-temperature sensor to realize real-time monitoring and precise control of the heating temperature, and the tensile strength of the submersible pump cable is increased by the carbon fiber reinforced core.

Description

Technical Field

[0001] The invention relates to the technical field of submersible pump cables, in particular to a multifunctional steel pipe sheathed submersible pump cable. Background Art

[0002] In the process of oil production, electric submersible pumps are often used for oil production. Electric submersible pumps include electric submersible screw pumps, electric submersible centrifugal pumps, reciprocating electric pumps and other types.

[0003] Electric submersible pump oil production is to place the power motor underground, so there must be a cable from the ground to transmit electrical energy to the underground motor. This cable is collectively called a submersible pump cable.

[0004] During the oil production process, it is also necessary to monitor parameters such as the temperature downhole. At the same time, wax often forms in the oil pipe during the oil production process. Therefore, it is necessary to design a multifunctional submersible pump cable that can conduct electrical energy, transmit temperature signals, and remove wax from the oil pipe.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a multifunctional steel pipe sheathed submersible pump cable to solve the shortcomings of the existing technology. Summary of the Invention

[0006] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a multifunctional steel pipe sheathed submersible pump cable. The multifunctional steel pipe sheathed submersible pump cable is achieved by installing a steel armor heating lead-in structure and a submersible pump lead-in line together, and connecting the steel armor heating lead-in structure to the steel armor outer sheath through a connecting structure. While supplying power to the submersible pump motor, a heating circuit for the entire steel armor outer sheath is formed. The heat generated by the steel armor outer sheath achieves the effect of clearing and preventing wax in the oil pipe. In combination with a communication cable and a high-temperature sensor, real-time monitoring and precise control of the heating temperature are achieved, and the tensile strength of the submersible pump cable is increased by a carbon fiber reinforced core.

[0007] The above-mentioned purpose of the present invention is achieved through the following technical means.

[0008] A multifunctional steel pipe sheathed submersible pump cable is provided. The two ends of the submersible pump cable are connected to the distribution cabinet and the submersible pump at the wellhead and the bottom of the well respectively. The submersible pump cable includes a communication cable. The outer sheath of the communication cable is installed with a heating lead reinforcement structure. The outer longitudinal sheath of the heating lead reinforcement structure is installed with a steel armor outer sheath. The end of the submersible pump cable close to the submersible pump is provided with a connection structure, which directly connects the steel armor heating copper conductor and the steel armor outer sheath.

[0009] Specifically, the heating lead-in reinforcement structure includes a steel armor heating lead-in structure and three submersible oil pump lead-in wires which are installed in a surrounding array with the axis of the communication cable as the center line. Adjacent steel armor heating lead-in structures and submersible oil pump lead-in wires are fitted together, and adjacent submersible oil pump lead-in wires are fitted together. Four carbon fiber reinforcement cores are also installed in a surrounding array with the axis of the communication cable as the center. The carbon fiber reinforcement cores are evenly fitted between the steel armor heating lead-in structure and the submersible oil pump lead-in wires and between the adjacent submersible oil pump lead-in wires. An inner protective layer is installed on the outside of the carbon fiber reinforcement core, the steel armor heating lead-in structure and the submersible oil pump lead-in wires. The carbon fiber reinforcement core is also fitted with the steel armor heating lead-in structure, the submersible oil pump lead-in wires and the inner protective layer. A steel armor outer protective layer is longitudinally installed on the outside of the inner protective layer.

[0010] The steel armor heating connection structure includes a steel armor heating copper conductor, the outside of the steel armor heating copper conductor is covered with a steel armor heating insulation layer, the outside of the steel armor heating insulation layer is installed with a steel armor heating inner sheath, and the outside of the steel armor heating inner sheath is installed with a steel armor heating shielding wrapping layer.

[0011] Preferably, the heating lead reinforcement structure includes three submersible oil pump lead wires that are installed in a surrounding array with the axis of the communication cable as the center line, and the adjacent submersible oil pump lead wires are in close contact. The outside of the communication cable is also installed with three carbon fiber reinforcement cores in a surrounding array with the axis of the communication cable as the center. The carbon fiber reinforcement cores are evenly laid between adjacent submersible oil pump lead wires. The outside of the carbon fiber reinforcement cores and the submersible oil pump lead wires are covered with an inner protective layer. The outside of the inner protective layer is longitudinally covered with a steel armor heating lead structure, and the outside of the steel armor heating lead structure is longitudinally covered with a steel armor outer protective layer.

[0012] The steel armor heating connection structure includes a steel armor heating copper conductor longitudinally installed on the outside of the inner protective layer, a steel armor heating insulation layer is installed on the outside of the steel armor heating copper conductor, a steel armor heating inner sheath is installed on the outside of the steel armor heating insulation layer, a steel armor heating shielding wrapping layer is installed on the outside of the steel armor heating inner sheath, and a steel armor outer protective layer is longitudinally wrapped on the outside of the steel armor heating shielding wrapping layer.

[0013] Specifically, the connection structure includes a copper belt ring, which is welded to the outside of the steel armor heating copper conductor, and the outer wall of the copper belt ring is in contact with the outer sheath of the steel armor.

[0014] Furthermore, the ends of the steel armor heating lead-in structure and the submersible pump lead-in line close to the distribution cabinet are connected to the wiring terminals in the distribution cabinet, the steel armor outer sheath is connected to the neutral wire in the distribution cabinet, and the wiring terminals in the distribution cabinet, the steel armor heating lead-in structure, the copper belt ring, the steel armor outer sheath and the neutral wire in the distribution cabinet are connected in sequence to form a closed loop.

[0015] Furthermore, a female socket is installed at one end of the submersible pump cable close to the submersible pump, a male plug is installed on the motor of the submersible pump, and the submersible pump lead wire is connected to the male plug through the female socket.

[0016] Preferably, the submersible pump lead wire includes an internal submersible pump lead copper conductor, the outside of the submersible pump lead copper conductor is covered with a submersible pump lead insulation layer, the outside of the submersible pump lead insulation layer is installed with a submersible pump lead inner sheath, and the outside of the submersible pump lead inner sheath is installed with a submersible pump lead shielding wrapping layer.

[0017] Furthermore, the submersible pump lead insulation layer and the steel armor heating insulation layer are both layered structures formed by a polyimide film layer and a mica tape layer. The polyimide film layer surrounds the outside of the submersible pump lead copper conductor and the steel armor heating copper conductor, and the mica tape layer is wrapped around the outside of the polyimide film layer.

[0018] Specifically, the carbon fiber reinforced core includes an inner carbon fiber core, and the outer portion of the carbon fiber core is bonded and wrapped with a basalt fiber layer.

[0019] Preferably, several high-temperature sensors are installed on the communication cable.

[0020] The present invention installs the steel armor heating lead-in structure and the submersible pump lead-in line together, and connects the steel armor heating lead-in structure to the steel armor outer sheath through a connecting structure. While supplying power to the submersible pump motor, a heating circuit for the entire steel armor outer sheath is formed. The heat generated by the steel armor outer sheath achieves the effect of clearing and preventing wax in the oil pipe. In combination with the communication cable and the high-temperature sensor, real-time monitoring and precise control of the heating temperature are achieved, and the tensile strength of the submersible pump cable is increased by the carbon fiber reinforced core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0022] Figure 1 It is a structural schematic diagram of the connection between the multifunctional steel pipe sheathed submersible pump cable, the power distribution cabinet and the submersible pump of the present invention.

[0023] Figure 2 It is a cross-sectional schematic diagram of Example 1 of the multifunctional steel pipe sheathed submersible pump cable of the present invention.

[0024] Figure 3 It is a cross-sectional schematic diagram of the steel armor heating lead-in structure of Example 1 of the multifunctional steel pipe sheathed submersible pump cable of the present invention.

[0025] Figure 4 It is a cross-sectional schematic diagram of Example 2 of the multifunctional steel pipe sheathed submersible pump cable of the present invention.

[0026] Figure 5It is a cross-sectional schematic diagram of the steel armor heating lead-in structure of Example 2 of the multifunctional steel pipe sheathed submersible pump cable of the present invention.

[0027] Figure 6 It is a cross-sectional schematic diagram of the submersible pump lead wire of the multifunctional steel tube sheathed submersible pump cable of the present invention.

[0028] Figure 7 It is a cross-sectional schematic diagram of the welding installation of the connection structure of the multifunctional steel pipe sheathed submersible pump cable and the steel armor heating copper conductor of the present invention.

[0029] Figure 8 It is a schematic cross-sectional view of the carbon fiber reinforced core of the multifunctional steel tube sheathed submersible pump cable of the present invention.

[0030] Figure 9 The present invention is a schematic structural diagram of the cooperation between the male plug and the female socket of the multifunctional steel pipe sheathed submersible pump cable.

[0031] from Figures 1 to 9 Including:

[0032] 1. Submersible oil pump cable;

[0033] 2. Power distribution cabinet;

[0034] 3. Submersible oil pump;

[0035] 4. Steel armor heating connection structure;

[0036] 5. Submersible oil pump lead wire;

[0037] 6. Communication cables;

[0038] 7. Inner protective layer;

[0039] 8. Heating and connecting to strengthen the structure;

[0040] 9. Carbon fiber reinforced core;

[0041] 10. Steel armor outer layer;

[0042] 11. Steel armor heating copper conductor;

[0043] 12. Steel armor heating insulation layer;

[0044] 13. Steel armor heating inner sheath;

[0045] 14. Steel armor heating shield wrapping layer;

[0046] 16. Copper belt ring;

[0047] 17. Male plug;

[0048] 18. Female socket;

[0049] 19. Submersible oil pump leads to copper conductors;

[0050] 20. Submersible oil pump lead insulation layer;

[0051] 21. Inner sheath of submersible oil pump;

[0052] 22. Submersible oil pump lead shield wrapping layer;

[0053] 23. Polyimide film layer;

[0054] 24. Mica tape layer;

[0055] 25. Carbon fiber core;

[0056] 26. Basalt fiber layer. DETAILED DESCRIPTION

[0057] The present invention is further described with reference to the following examples.

[0058] Example 1:

[0059] like Figure 1-9 As shown, a multifunctional steel pipe sheathed submersible pump cable, the two ends of the submersible pump cable 1 are connected to the distribution cabinet 2 and the submersible pump 3 at the wellhead and the bottom of the well respectively, the submersible pump cable 1 includes a communication cable 6, the outer sheath of the communication cable is installed with a heating lead reinforcement structure 8, the outer longitudinal sheath of the heating lead reinforcement structure 8 is installed with a steel armor outer sheath 10, and the end of the submersible pump cable 1 close to the submersible pump 3 is provided with a connecting structure, which directly connects the steel armor heating copper conductor 11 and the steel armor outer sheath 10.

[0060] The present application is used for connecting the submersible pump 3 in the oil production process to achieve the multifunctional effects of increasing tensile strength, conductivity and wax removal and prevention. First, the submersible pump cable 1 can be connected to the distribution cabinet 2 at the wellhead, and then connected to the submersible pump 3 motor at the bottom of the well through a plug and socket and a guide rail. The three submersible pump lead wires 5 are responsible for transmitting the electric energy of the submersible pump 3. The steel armor heating lead structure 4 is responsible for introducing the current to the bottom of the steel armor outer sheath 10. The current loop of the steel armor outer sheath 10 realizes resistance heating of the entire steel armor outer sheath 10, thereby achieving the effect of wax removal and prevention. The carbon fiber reinforcement core 9 can enhance the tensile strength and improve the strength of the submersible pump cable 1.

[0061] The inner protective layer 7 is made of glass fiber tape or other polymer materials. Its function is to protect the steel armor heating lead structure 4 and the submersible pump lead wire 5 from damage during the production process. The thickness of the inner protective layer 7 is 0.5 to 1.5 mm.

[0062] The heating lead-in reinforcement structure 8 includes a steel armor heating lead-in structure 4 and three submersible oil pump lead-in wires 5 installed in a surrounding array with the axis of the communication cable 6 as the center line. Adjacent steel armor heating lead-in structures 4 and submersible oil pump lead-in wires 5 are fitted together, and adjacent submersible oil pump lead-in wires 5 are fitted together. The outside of the communication cable 6 is also equipped with four carbon fiber reinforcement cores 9 in a surrounding array with the axis of the communication cable 6 as the center. The carbon fiber reinforcement cores 9 are evenly fitted and arranged between the steel armor heating lead-in structure 4 and the submersible oil pump lead-in wires 5 and between the adjacent submersible oil pump lead-in wires 5. An inner protective layer 7 is installed on the outside of the carbon fiber reinforcement cores 9, the steel armor heating lead-in structure 4 and the submersible oil pump lead-in wires 5. The carbon fiber reinforcement cores 9 are also fitted with the steel armor heating lead-in structure 4, the submersible oil pump lead-in wires 5 and the inner protective layer 7. A steel armor outer protective layer 10 is longitudinally installed on the outside of the inner protective layer 7.

[0063] The steel armor heating connection structure 4 includes a steel armor heating copper conductor 11, the outside of the steel armor heating copper conductor 11 is covered with a steel armor heating insulation layer 12, the outside of the steel armor heating insulation layer 12 is installed with a steel armor heating inner sheath 13, and the outside of the steel armor heating inner sheath 13 is installed with a steel armor heating shielding wrapping layer 14.

[0064] The outer protective layer 10 of the steel armor is made of carbon steel strips or stainless steel strips longitudinally welded together, and the thickness of the steel strips is 1.2 to 2.5 mm. 2 As the outer sheath of the submersible pump cable 1, it isolates the oil, gas and water mixture in the oil well from the steel armor heating lead-in structure 4 and the submersible pump lead-in wire 5 inside the submersible pump cable 1, so that the steel armor heating lead-in structure 4 and the submersible pump lead-in wire 5 are protected from damage by media such as oil, gas and water. At the same time, during the construction process of casting and fishing the submersible pump cable 1, it bears the tension of the submersible pump cable 1 together with the carbon fiber reinforcement core 9.

[0065] The cross-sectional area of ​​the steel armor heating copper conductor 11 is 30 to 50 mm 2 The steel armor heating copper conductor 11 is installed independently from the submersible pump lead wire 5 and other parts and cannot be in direct contact. Therefore, the steel armor heating insulation layer 12, the steel armor heating inner sheath 13 and the steel armor heating shielding wrapping layer 14 are used for insulation and shielding treatment. The connection structure is installed near the end of the entire submersible pump cable 1 close to the submersible pump 3, so that the current in the distribution cabinet 2 passes through the steel armor heating copper conductor 11 to reach the bottom of the submersible pump cable 1, and then conducts to the steel armor outer sheath 10 through the connection structure. The steel armor heating copper conductor 11 has a small resistance and its own heat is very small and can be ignored. However, the resistance of the steel armor outer sheath 10 is large, which will generate heat to clean or prevent wax from forming on the oil pipe.

[0066] The connection structure includes a copper belt ring 16 , which is welded to the outside of the steel armor heating copper conductor 11 , and the outer wall of the copper belt ring 16 is in contact with the outer sheath 10 of the steel armor.

[0067] The connection structure realizes the conductivity of the steel armor outer sheath 10 by welding the copper belt ring 16 to the steel armor heating copper conductor 11. The inner wall of the copper belt ring 16 is welded and bonded to the outer wall of the steel armor heating copper conductor 11, and the outer wall of the copper belt ring 16 is directly bonded to the inner wall of the steel armor outer sheath 10.

[0068] During the connection structure processing process, the copper belt ring 16 and the steel armor outer sheath 10 undergo the process of pressing the outer steel belt into a steel tube. The copper belt ring 16 also becomes a tube on the inner side of the steel armor outer sheath 10 and is tightly pressed together with the steel armor outer sheath 10. This ensures that the copper conductor and the steel armor outer sheath 10 are reliably connected. When the current passes through the steel armor, the copper conductor 11 and the copper belt ring 16 are heated and flow to the steel armor outer sheath 10, and finally connected to the neutral line in the distribution cabinet 2. When the current flows through the steel armor outer sheath 10, a large amount of heat is generated.

[0069] The contact surface between the copper belt ring 16 and the steel armor outer sheath 10 is subjected to anti-corrosion treatment.

[0070] The ends of the steel armor heating lead-in structure 4 and the submersible pump lead-in line 5 close to the distribution cabinet 2 are connected to the wiring terminals in the distribution cabinet 2, the steel armor outer sheath 10 is connected to the neutral wire in the distribution cabinet 2, and the wiring terminals in the distribution cabinet 2, the steel armor heating lead-in structure 4, the copper belt ring 16, the steel armor outer sheath 10 and the neutral wire in the distribution cabinet 2 are connected in sequence to form a closed loop.

[0071] One end of the steel armor heating lead structure 4 is connected to the terminal block in the power distribution cabinet 2, and the other end is electrically connected to the steel armor outer sheath 10 through the copper belt ring 16. The current eventually flows back to the neutral line in the power distribution cabinet 2 to form a loop.

[0072] A female socket 18 is installed at one end of the submersible pump cable 1 close to the submersible pump 3 , a male plug 17 is installed on the motor of the submersible pump 3 , and the submersible pump lead wire 5 is connected to the male plug 17 through the female socket 18 .

[0073] First, lower the submersible pump 3 motor and male plug 17 to the bottom of the well along the oil pipe. After the oil pipe is lowered, feed the cable into the oil pipe. The submersible pump cable 1 goes down along the oil pipe. When the female socket 18 on the submersible pump cable 1 is close to the male plug 17, connect the female socket 18 and the male plug 17 through the guide rail on the oil pipe to complete the connection between the submersible pump cable 1 and the submersible motor. If the pump is inspected and repaired, the submersible pump cable 1 can be pulled out through the cable pulling device.

[0074] The three-phase terminals of the male plug 17 are connected to the three-phase terminals of the female socket 18 .

[0075] The submersible pump lead wire 5 includes an internal submersible pump lead copper conductor 19, the outside of the submersible pump lead copper conductor 19 is covered with a submersible pump lead insulation layer 20, the outside of the submersible pump lead insulation layer 20 is installed with a submersible pump lead inner sheath 21, and the outside of the submersible pump lead inner sheath 21 is installed with a submersible pump lead shielding wrapping layer 22.

[0076] The submersible pump lead wire 5 is electrically conductive through the submersible pump lead copper conductor 19 , and also achieves insulation and shielding effects through the submersible pump lead insulation layer 20 , the submersible pump lead inner sheath 21 and the submersible pump lead shielding wrapping layer 22 .

[0077] The cross-sectional area of ​​the three submersible pump lead wires 5 of the submersible pump lead copper conductor 19 is 10 to 50 mm 2 .

[0078] The submersible pump lead insulation layer 20 and the steel armor heating insulation layer 12 are both layered structures formed by a polyimide film layer 23 and a mica tape layer 24. The polyimide film layer 23 surrounds the outside of the submersible pump lead copper conductor 19 and the steel armor heating copper conductor 11, and the mica tape layer 24 is wrapped around the outside of the polyimide film layer 23.

[0079] The submersible pump lead insulation layer 20 is made of polyimide film and mica tape, both of which are high-temperature resistant insulation materials and have an insulating effect.

[0080] The carbon fiber reinforced core 9 includes an inner carbon fiber core 25 , and the outer portion of the carbon fiber core 25 is bonded and wrapped with a basalt fiber layer 26 .

[0081] The submersible pump cable 1 has to withstand a large tensile force during the casting and salvaging construction process. The carbon fiber reinforcement core 9 inside the submersible pump cable 1 and the steel pipe sheath jointly bear the tensile force. The carbon fiber reinforcement core 9 is composed of a carbon fiber core 25 and a basalt fiber layer 26. The diameter of each carbon fiber reinforcement core 9 is 3 to 5 mm.

[0082] The carbon fiber reinforcement core 9 is formed by pultruding carbon fiber, basalt fiber and epoxy resin together through a mold. The carbon fiber reinforcement core 9 has a large tensile force and a light weight. The tensile force of the carbon fiber reinforcement core 9 reaches 3 to 5 tons.

[0083] Several high-temperature sensors are installed on the communication cable 6.

[0084] The communication cable 6 uses a 4-core or 6-core communication cable 6 to transmit the temperature signal, and the high-temperature sensor measurement points are distributed at different positions inside the cable.

[0085] The length of the submersible pump cable 1 of this embodiment is 1000 to 3500 meters, the cable withstand voltage is 380 to 3000V, the current carrying range of the submersible pump 3 motor is 15 to 45A, the heat resistance grade of the submersible pump cable 1 is 125℃ to 250℃, the tensile force range of the submersible pump cable 1 is 5 to 10 tons, and the outer diameter of the cable is 20 to 32mm.

[0086] Example 2:

[0087] like Figure 4-5 Under the condition that other structures remain unchanged from Example 1, the heating lead reinforcement structure 8 of this embodiment includes three submersible oil pump lead wires 5 installed in a surrounding array with the axis of the communication cable 6 as the center line. Adjacent submersible oil pump lead wires 5 are fitted together. Three carbon fiber reinforcement cores 9 are also installed in a surrounding array with the axis of the communication cable 6 as the center. The carbon fiber reinforcement cores 9 are evenly fitted and arranged between adjacent submersible oil pump lead wires 5. The carbon fiber reinforcement cores 9 and the submersible oil pump lead wires 5 are covered with an inner protective layer 7. The outer surface of the inner protective layer 7 is longitudinally wrapped with a steel armor heating lead structure 4. The outer surface of the steel armor heating lead structure 4 is longitudinally wrapped with a steel armor outer sheath 10.

[0088] The steel armor heating connection structure 4 includes a steel armor heating copper conductor 11 longitudinally wrapped and installed on the outside of the inner protective layer 7, a steel armor heating insulation layer 12 is installed on the outside of the steel armor heating insulation layer 12, a steel armor heating inner sheath 13 is installed on the outside of the steel armor heating inner sheath 13, a steel armor heating shielding wrapping layer 14 is installed on the outside of the steel armor heating shielding wrapping layer 14, and a steel armor outer protective layer 10 is longitudinally wrapped on the outside of the steel armor heating shielding wrapping layer 14.

[0089] In this embodiment, the steel armor heating lead structure 4 is wrapped in a tubular shape on the outside of the inner protective layer 7, and the internal structure of the carbon fiber reinforced core 9 and the submersible pump lead wire 5 remains unchanged. The whole is evenly distributed in a surrounding array on the outside of the communication cable 6. The outer part of the inner protective layer 7 is annular, and the inner part can be shaped to fill the gap between the carbon fiber reinforced core 9 and the submersible pump lead wire 5. The steel armor heating copper conductor 11 is changed into a tubular shape and wrapped on the outside of the inner protective layer 7.

[0090] In this embodiment, the cross-sectional area of ​​each carbon fiber reinforcement core 9 is 50-60 mm 2 The cross-sectional area of ​​the copper conductor 19 of the three submersible pump lead wires 5 is 10-35mm 2 The cross-sectional area of ​​the steel armor heating copper conductor 11 is 20-50mm 2 , steel armor outer layer 10 thickness 1.0-1.5mm 2 The outer diameter of the steel armor outer layer 10 is 25-35 mm.

[0091] The present invention installs the steel armor heating lead-in structure 4 and the submersible pump lead-in line 5 together, and connects the steel armor heating lead-in structure 4 to the steel armor outer sheath 10 through a connecting structure. While supplying power to the submersible pump 3 motor, a heating circuit for the entire steel armor outer sheath 10 is formed. The steel armor outer sheath 10 generates heat to achieve the effect of clearing and preventing wax in the oil pipe. In combination with the communication cable 6 and the high-temperature sensor, real-time monitoring and precise control of the heating temperature are achieved, and the tensile strength of the submersible pump cable 1 is increased by the carbon fiber reinforcement core 9.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. Multifunctional steel pipe sheathed submersible pump cable, the two ends of the submersible pump cable are connected to the distribution cabinet and submersible pump at the wellhead and bottom of the well respectively, characterized by: The submersible pump cable includes a communication cable, the outer surface of the communication cable is wrapped with a heating lead reinforcement structure, and the outer surface of the heating lead reinforcement structure is longitudinally wrapped with a steel armor outer sheath; The heating lead-in reinforcement structure includes a steel armor heating lead-in structure and three submersible oil pump lead-in wires which are installed in a surrounding array with the axis of the communication cable as the center line. The adjacent steel armor heating lead-in structures and the submersible oil pump lead-in wires are fitted together, and the adjacent submersible oil pump lead-in wires are fitted together. The outside of the communication cable is also equipped with four carbon fiber reinforcement cores which are installed in a surrounding array with the axis of the communication cable as the center. The carbon fiber reinforcement cores are evenly fitted between the steel armor heating lead-in structure and the submersible oil pump lead-in wires and between the adjacent submersible oil pump lead-in wires. An inner protective layer is installed on the outside of the carbon fiber reinforcement core, the steel armor heating lead-in structure and the submersible oil pump lead-in wires. The carbon fiber reinforcement core is simultaneously fitted with the steel armor heating lead-in structure, the submersible oil pump lead-in wires and the inner protective layer. The steel armor outer protective layer is longitudinally installed on the outside of the inner protective layer. The steel armor heating connection structure includes a steel armor heating copper conductor, the steel armor heating copper conductor is coated with a steel armor heating insulation layer, the steel armor heating inner sheath is installed on the outside of the steel armor heating insulation layer, and the steel armor heating shielding wrapping layer is installed on the outside of the steel armor heating inner sheath; One end of the submersible pump cable close to the submersible pump is provided with a connection structure, and the connection structure directly connects the steel armor heating copper conductor and the steel armor outer sheath.

2. The multifunctional steel tube sheathed submersible pump cable according to claim 1, characterized in that: The connection structure comprises a copper belt ring, which is welded to the outside of the steel armor heating copper conductor, and the outer wall of the copper belt ring is in contact with the outer sheath of the steel armor.

3. The multifunctional steel tube sheathed submersible pump cable according to claim 2, characterized in that: The ends of the steel armor heating lead-in structure and the submersible pump lead-in line close to the power distribution cabinet are connected to the wiring terminals in the power distribution cabinet, the steel armor outer sheath is connected to the neutral wire in the power distribution cabinet, and the wiring terminals in the power distribution cabinet, the steel armor heating lead-in structure, the copper belt ring, the steel armor outer sheath and the neutral wire in the power distribution cabinet are connected in sequence to form a closed loop.

4. The multifunctional steel tube sheathed submersible pump cable according to claim 3, characterized in that: A female socket is installed at one end of the submersible pump cable close to the submersible pump, a male plug is installed on the motor of the submersible pump, and the submersible pump lead wire is connected to the male plug through the female socket.

5. The multifunctional steel tube sheathed submersible pump cable according to claim 4, characterized in that: The submersible pump lead wire includes an internal submersible pump lead copper conductor, the outside of the submersible pump lead copper conductor is covered with a submersible pump lead insulation layer, the outside of the submersible pump lead insulation layer is installed with a submersible pump lead inner sheath, and the outside of the submersible pump lead inner sheath is installed with a submersible pump lead shielding wrapping layer.

6. The multifunctional steel tube sheathed submersible pump cable according to claim 5, characterized in that: The submersible pump lead insulation layer and the steel armor heating insulation layer are both layered structures formed by a polyimide film layer and a mica tape layer. The polyimide film layer surrounds the outside of the submersible pump lead copper conductor and the steel armor heating copper conductor, and the mica tape layer is wrapped around the outside of the polyimide film layer.

7. The multifunctional steel tube sheathed submersible pump cable according to claim 6, characterized in that: The carbon fiber reinforced core comprises an inner carbon fiber core, and the outer portion of the carbon fiber core is bonded and wrapped with a basalt fiber layer.

8. The multifunctional steel tube sheathed submersible pump cable according to claim 7, characterized in that: Several high-temperature sensors are installed on the communication cable.

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