An oil-resistant submersible pump cable

Abstract

The present invention relates to the field of cable technology, specifically to an oil-resistant submersible pump cable, comprising a cable body, a heating assembly and a gusset plate, wherein the heating assembly is arranged outside the cable body and extends along the length direction of the cable body, and a heating coil is coaxially arranged outside the output oil pipe of the oil-resistant submersible pump. The present invention is provided with a heating assembly and a gusset plate, and during the entire oil pumping process of the oil-resistant submersible pump, the heating assembly located only in the oil well and the heating coil at the required position of the output oil pipe are in an electrically connected state through the buckling cooperation between the heating assembly and the gusset plate, so that the portion of the output oil pipe extending into the oil well is heated, while the heating assembly not extending into the oil well is not in an electrically connected state, and therefore does not generate heat to the outside, which can not only reduce energy waste, but also avoid the local temperature of the cable body being too high, which causes the accelerated aging of the insulation layer, and is conducive to reducing safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to an oil-resistant submersible pump cable. Background Art

[0002] Submersible pumps, also known as electric submersible pumps, are a type of pumping equipment widely used in the oil extraction industry. They are designed to extract crude oil from oil wells deep underground. The submersible pump system is mainly composed of the following parts, including motors, centrifugal pumps, protectors, separators, cables, and control devices.

[0003] In order to prevent crude oil from solidifying in a low-temperature environment, a heat-conducting device is often installed on the outside of the cable of the electric submersible pump, so that the heat generated by the heating of the cable is transferred to the surrounding crude oil, so that the viscosity of the crude oil in the oil well is reduced after the temperature rises, so that the crude oil in the oil well can be pumped into the oil pipeline by the submersible pump. However, the existing electric submersible pump has the following problems when in use: after the crude oil enters the output oil pipeline of the submersible pump, the delivery speed of the crude oil will be reduced, affecting the normal delivery of the crude oil, and the heating cable of the electric submersible pump is not entirely located in the crude oil of the oil well, and the heat generated by the cable outside the crude oil of the oil well cannot be absorbed by the crude oil, which not only causes energy waste, but also the excessively high local temperature of the cable will accelerate the aging of the cable insulation material, and the safety hazard is too great. Summary of the invention

[0004] Based on this, it is necessary to provide an oil-resistant submersible pump cable to address the problems existing in the current electric submersible pump cables, which is used to solve the problem that the existing submersible pump cables not only waste energy when in use, but also the local high temperature of the cable will cause accelerated aging of the cable insulation material and pose a great safety hazard.

[0005] The above purpose is achieved through the following technical solutions:

[0006] An oil-resistant submersible pump cable comprises:

[0007] Cable body;

[0008] A heating component is arranged outside the cable body and extends along the length direction of the cable body;

[0009] A heating ring is coaxially arranged on the outside of the output oil pipe of the oil-resistant submersible pump;

[0010] A gusset plate, wherein there are multiple gusset plates, and the multiple gusset plates are sequentially arranged outside the heating coil along the length direction of the heating coil;

[0011] The buckle plate can be selectively buckled with the heating component at the required position on the cable body, so that the heating component and the heating ring at the required position of the output oil pipe are in an electrically connected state, thereby heating the required position of the output oil pipe.

[0012] In one embodiment, the cable body includes a conductor, an insulating layer, an inner sheath, a steel wire armor and an outer sheath, the insulating layer is wrapped around the outside of the conductor, the inner sheath is arranged on the outside of the insulating layer, the steel wire armor is arranged on the outside of the inner sheath, and the outer sheath is arranged on the outside of the steel wire armor.

[0013] In one embodiment, the heating component includes an insulating elastic sleeve, a positive conductive strip, a negative conductive strip and an insulating elastic body. The insulating elastic sleeve is arranged on the outside of the cable body. A notch is opened on one side of the insulating elastic sleeve, and the notch can be opened or closed. An installation chamber is opened inside the insulating elastic sleeve, and a mounting plate is arranged at the bottom of the mounting chamber. The positive conductive strip and the negative conductive strip are respectively slidably arranged on the left and right sides of the mounting plate. The positive conductive strip and the negative conductive strip extend along the length direction of the cable body. The insulating elastic member is arranged on the mounting plate and is located between the positive conductive strip and the negative conductive strip and is slidably connected to both the positive conductive strip and the negative conductive strip.

[0014] In one embodiment, the positive electrode conductive strip and the negative electrode conductive strip can be synchronously moved close to each other so that the positive electrode conductive strip and the negative electrode conductive strip are conductive;

[0015] The positive electrode conductive strip and the negative electrode conductive strip can also be moved away from each other synchronously, so that the positive electrode conductive strip and the negative electrode conductive strip are disconnected.

[0016] In one of the embodiments, a positive pole magnetic block is disposed in the positive pole conductive strip, and a negative pole magnetic block is disposed in the negative pole conductive strip.

[0017] In one embodiment, the opposing surfaces of the positive electrode conductive strip and the negative electrode conductive strip are inclined surfaces, the inclined surfaces are inclined from bottom to top toward a side close to the elastic member, and the lower longitudinal section of the conductive connector is triangular or spherical.

[0018] In one embodiment, a first magnetic sealing block and a second magnetic sealing block are respectively disposed on two inner side surfaces of the notch, and opposite surfaces of the first magnetic sealing block and the second magnetic sealing block have opposite magnetic properties.

[0019] In one embodiment, the tops of the opposing surfaces of the first magnetic sealing block and the second magnetic sealing block are provided with chamfers.

[0020] In one embodiment, the buckle plate includes an insulating shell and a conductive connector, the insulating shell is arranged outside the heating coil, and a buckle slot is opened on a side of the insulating shell away from the heating coil, and the outer dimensions of the buckle slot are adapted to the outer dimensions of the insulating elastic sleeve;

[0021] The conductive connecting piece is arranged at the bottom of the buckle slot, and the conductive connecting piece is electrically connected to the heating coil;

[0022] When the insulating elastic sleeve is buckled in the buckling notch, the conductive connector passes through the notch and extends into the installation chamber, and is electrically connected to the positive conductive strip and the negative conductive strip at the same time.

[0023] In one of the embodiments, insulating isolation blocks are provided at both ends of the conductive connector along the length direction of the insulating sleeve.

[0024] The beneficial effects of the present invention are:

[0025] The present invention is provided with a heating component and a buckle plate. During the entire oil pumping process of the oil-resistant submersible pump, the heating component and the buckle plate are buckled together so that only the heating component located in the oil well and the heating ring at the required position of the output oil pipe are in an electrically connected state, thereby heating the part of the output oil pipe extending into the oil well, while the heating component that has not extended into the oil well is not in an electrically connected state, and therefore does not generate heat to the outside. This not only reduces energy waste, but also avoids the accelerated aging of the insulation layer caused by the local temperature of the cable body being too high, which is beneficial to reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of an oil-resistant submersible pump cable of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a buckle plate in an oil-resistant submersible pump cable of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a heating component in an oil-resistant submersible pump cable of the present invention;

[0029] Figure 4 for Figure 1 A schematic diagram of the enlarged structure in the middle;

[0030] Figure 5 It is a structural schematic diagram of an insulating isolation block and a conductive connector in an oil-resistant submersible pump cable of the present invention;

[0031] Figure 6 It is a structural schematic diagram of an insulating casing in an oil-resistant submersible pump cable of the present invention;

[0032] Figure 7 The present invention is a schematic diagram of the conduction state of the positive conductive strip and the negative conductive strip in an oil-resistant submersible pump cable.

[0033] in:

[0034] 100. Cable body; 110. Conductor; 120. Insulating layer; 130. Inner sheath; 140. Steel wire armor; 150. Outer sheath; 200. Heating assembly; 210. Insulating elastic sleeve; 211. Notch; 212. Installation chamber; 220. Positive conductive strip; 230. Negative conductive strip; 240. Insulating elastomer; 250. Installation plate; 300. Buckle plate; 310. Insulating sleeve; 311. Buckle notch; 320. Conductive connector; 330. Insulating isolation block; 340. First magnetic sealing block; 350. Second magnetic sealing block; 360. Bevel chamfer; 400. Output oil pipe; 410. Heating coil. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] like Figure 1-Figure 7As shown, an oil-resistant submersible pump cable includes a cable body 100, a heating component 200 and a buckle plate 300. The heating component 200 is arranged outside the cable body 100 and extends along the length direction of the cable body 100. A heating coil 410 is coaxially arranged outside the output oil pipe 400 of the oil-resistant submersible pump. There are multiple buckle plates 300, and the multiple buckle plates 300 are sequentially arranged outside the heating coil 410 along the length direction of the heating coil 410. The buckle plate 300 can be selectively buckled with the heating component 200 at the required position on the cable body 100, so that the heating component 200 and the heating coil 410 at the required position of the output oil pipe 400 are in an electrically connected state, thereby heating the required position of the output oil pipe 400.

[0039] During use, the construction workers need to drop the oil-resistant submersible pump to the bottom of the oil well. In order to make only the part of the heating component 200 located in the oil well heat up, the construction workers need to buckle the part of the heating component 200 extending into the oil well into the buckle plate 300 during the process of dropping the oil-resistant submersible pump downward. At this time, the part of the heating component 200 buckled with the buckle plate 300 is electrically connected to the heating ring 410 at the required position of the output oil pipe 400. After starting the heating component 200, the heating component 200 heats the part of the output oil pipe 400 extending into the oil well (that is, the output oil pipe 400 at the required position) so that the surrounding of the output oil pipe 400 extending into the oil well As the temperature rises, the viscosity of the crude oil decreases after absorbing heat, thereby ensuring the normal transportation of the crude oil. During the entire oil pumping process of the oil-resistant submersible pump, the heating component 200 and the buckle plate 300 are fastened together, so that only the heating component 200 located in the oil well and the heating ring 410 at the required position of the output oil pipe 400 are in an electrically connected state, thereby heating the portion of the output oil pipe 400 extending into the oil well, while the heating component 200 that has not extended into the oil well is not in an electrically connected state, and therefore does not generate heat to the outside. This not only reduces energy waste, but also avoids the local temperature of the cable body 100 being too high, which causes the aging of the insulating layer 120 to be accelerated, and is beneficial to reducing safety hazards.

[0040] In a further embodiment, Figure 3 As shown, the cable body 100 includes a conductor 110, an insulating layer 120, an inner sheath 130, a steel wire armor 140 and an outer sheath 150. The insulating layer 120 is wrapped around the outside of the conductor 110, the inner sheath 130 is arranged on the outside of the insulating layer 120, the steel wire armor 140 is arranged on the outside of the inner sheath 130, and the outer sheath 150 is arranged on the outside of the steel wire armor 140.

[0041] It can be understood that the inner guard 130 is directly wrapped around the outside of the insulating layer 120, and its main function is to protect the insulating layer 120 of the cable from mechanical damage and prevent the intrusion of water, moisture and other corrosive substances, thereby extending the service life of the cable. The outer guard 150 provides the outermost layer of physical protection to resist environmental factors such as wear, impact, ultraviolet radiation, chemical corrosion, etc., and protects the internal structure from external damage. The steel wire armor 140 is used to enhance the tensile strength and compressive resistance of the cable to prevent the internal structure of the cable from being damaged during laying, excavation or subjected to external mechanical forces.

[0042] In a further embodiment, Figure 3 and Figure 4 As shown, the heating assembly 200 includes an insulating elastic sleeve 210, a positive conductive strip 220, a negative conductive strip 230 and an insulating elastic body 240. The insulating elastic sleeve 210 is arranged on the outside of the cable body 100. A notch 211 is opened on one side of the insulating elastic sleeve 210, and the notch 211 can be opened or closed. An installation chamber 212 is opened inside the insulating elastic sleeve 210, and a mounting plate 250 is arranged at the bottom of the mounting chamber 212. The positive conductive strip 220 and the negative conductive strip 230 are respectively slidably arranged on the left and right sides of the mounting plate 250. The positive conductive strip 220 and the negative conductive strip 230 both extend along the length direction of the cable body 100. The insulating elastic member is arranged on the mounting plate 250, and is located between the positive conductive strip 220 and the negative conductive strip 230 and is slidably connected to both the positive conductive strip 220 and the negative conductive strip 230.

[0043] It is understandable that if Figure 7 As shown, the length of the positive conductive strip 220 and the negative conductive strip 230 is the same as the length of the cable body 100. When the positive conductive strip 220 and the negative conductive strip 230 are not in contact, it is equivalent to being in an "open circuit" state. When the positive conductive strip 220 and the negative conductive strip 230 are in contact, it is equivalent to a local "short circuit". At this time, the positive conductive strip 220 and the negative conductive strip 230 in the short-circuited area are in contact, the electric energy is released at this place, and the temperature rises sharply. The heat generated by the electric energy release can be used to heat the crude oil, making the crude oil thinner.

[0044] In a further embodiment, Figure 3 As shown, the positive conductive strip 220 and the negative conductive strip 230 can be synchronously moved closer to each other so that the positive conductive strip 220 and the negative conductive strip 230 are turned on. When the positive conductive strip 220 and the negative conductive strip 230 are synchronously moved closer to each other, a short circuit is formed at the conductive point, and the electrical energy can be quickly converted into thermal energy at this point. The positive conductive strip 220 and the negative conductive strip 230 can also be synchronously moved away from each other so that the positive conductive strip 220 and the negative conductive strip 230 are turned off.

[0045] In a further embodiment, Figure 2 and Figure 4 As shown, the buckle plate 300 includes an insulating shell 310 and a conductive connector 320. The insulating shell 310 is arranged on the outside of the heating coil 410. A buckle slot 311 is opened on the side of the insulating shell 310 away from the heating coil 410. The outer dimensions of the buckle slot 311 are compatible with the outer dimensions of the insulating elastic sleeve 210. The conductive connector 320 is arranged at the bottom of the buckle slot 311, and the conductive connector 320 is electrically connected to the heating coil 410. When the insulating elastic sleeve 210 is buckled into the buckle slot 311, the conductive connector 320 passes through the notch 211 and extends into the installation chamber 212, and is electrically connected to the positive conductive strip 220 and the negative conductive strip 230 at the same time.

[0046] For the heating assembly 200 extending into the oil well, the construction personnel buckle it into the buckle slot 311, such as Figure 4 As shown, when the insulating elastic sleeve 210 is buckled in the buckling notch 311, the conductive connector 320 passes through the notch 211 and extends into the installation chamber 212, and the conductive connector 320 pushes the insulating elastic body 240, so that the insulating elastic body 240 is compressed to Figure 4 In the state shown, the conductive connector 320 is electrically connected to the positive conductive strip 220 and the negative conductive strip 230 at the same time, and the conductive connector 320 is fixedly connected to the heating coil 410, so the heating coil 410 is equivalent to forming a "short circuit" at the electrical connection position of the positive conductive strip 220 and the negative conductive strip 230. After the two ends of the positive conductive strip 220 and the negative conductive strip 230 are energized respectively, the electrical energy is transmitted to the heating coil 410 and converted into heat energy, so that the temperature around the heating coil 410 increases. Since the heating coil 410 is located outside the output oil pipe 400, the temperature around the output oil pipe 400 increases, so that the crude oil outside the output oil pipe 400 and the crude oil inside the output oil pipe 400 absorb heat, heat up and become thinner, so as to maintain the normal transportation of the crude oil and prevent the crude oil from becoming thick or solidified.

[0047] The heating component 200 that has not been inserted into the oil well does not need to be snapped into the snap-in groove 311. Therefore, the heating component 200 that has not been inserted into the oil well will not be electrically connected to the positive conductive strip 220 and the negative conductive strip 230 through the conductive connector 320. Therefore, the heating ring 410 around the output oil pipe 400 that has not been inserted into the oil well will not generate heat to the outside, thereby reducing energy waste and avoiding the accelerated aging of the cable insulation material caused by the local temperature of the cable being too high, which is beneficial to reducing safety hazards.

[0048] In a further embodiment, a positive pole magnetic block is disposed in the positive pole conductive strip 220 , and a negative pole magnetic block is disposed in the negative pole conductive strip 230 .

[0049] When the conductive connector 320 passes through the notch 211 and extends into the installation chamber 212, the conductive connector 320 pushes the insulating elastic body 240 downward, so that the insulating elastic body 240 is compressed. At this time, the insulating elastic body 240 no longer squeezes the positive conductive strip 220 and the negative conductive strip 230. Under the action of magnetic attraction, the positive conductive strip 220 and the negative conductive strip 230 are close to each other, so that the positive conductive strip 220 and the negative conductive strip 230 are attracted together with the conductive connector 320.

[0050] When the conductive connector 320 is removed from the installation chamber 212, the insulating elastic body 240 is reset under its own elastic force, and the insulating elastic body 240 pushes the positive conductive strip 220 and the negative conductive strip 230 away from each other, and resets the positive conductive strip 220 and the negative conductive strip 230 to the position as shown in FIG. Figure 3 Initial position shown.

[0051] In a further embodiment, Figure 5 and Figure 6 As shown, insulating isolation blocks 330 are provided at both ends of the conductive connecting member 320 along the length direction of the insulating shell 310 .

[0052] At the junction of the portion of the conductive connector 320 extending into the installation chamber 212 and the portion of the conductive connector 320 not extending into the installation chamber 212, a triangular bevel is formed between the second magnetic sealing block 350 and the chamfer 360. At this time, the insulating isolation block 330 can be just stuck in the triangular bevel between the second magnetic sealing block 350 and the chamfer 360, supporting and sealing the connection between the second magnetic sealing block 350 and the chamfer 360, thereby increasing the sealing performance and preventing the notch 211 from deforming.

[0053] In a further embodiment, Figure 4 As shown, the opposite surfaces of the positive conductive strip 220 and the negative conductive strip 230 are inclined surfaces, which are inclined from bottom to top toward the side close to the elastic member, and the lower longitudinal section of the conductive connector 320 is either a triangle or a spherical head.

[0054] When the conductive connector 320 passes through the notch 211 and extends into the installation chamber 212, the lower portion of the conductive connector 320 contacts the insulating elastomer 240 and applies a force to the insulating elastomer 240, so that the insulating elastomer 240 is compressed and deformed. At this time, under the sliding cooperation between the inclined surfaces of the positive conductive strip 220 and the negative conductive strip 230 and the insulating elastomer 240, the positive conductive strip 220 and the negative conductive strip 230 can approach each other under the action of magnetic attraction, so that the positive conductive strip 220 and the negative conductive strip 230 are attracted to the conductive connector 320.

[0055] When the conductive connector 320 is removed from the installation chamber 212, the insulating elastomer 240 is reset under the elastic force, and the insulating elastomer 240 pushes the positive conductive strip 220 and the negative conductive strip 230 along the inclined surface, so that the positive conductive strip 220 and the negative conductive strip 230 move away from each other synchronously, thereby resetting to the initial position.

[0056] In a further embodiment, Figure 3 As shown, the first magnetic sealing block 340 and the second magnetic sealing block 350 are respectively disposed on the two inner side surfaces of the notch 211 , and the opposite surfaces of the first magnetic sealing block 340 and the second magnetic sealing block 350 have opposite magnetic properties.

[0057] The first magnetic sealing block 340 and the second magnetic sealing block 350 are provided to increase the sealing performance of the connection between the conductive connector 320 and the chamfer 360 , thereby preventing crude oil from overflowing into the installation chamber 212 through the notch 211 .

[0058] In a further embodiment, Figure 3 As shown, the tops of the opposing surfaces of the first magnetic sealing block 340 and the second magnetic sealing block 350 are provided with chamfers 360 .

[0059] Through the sliding fit between the chamfer 360 and the lower part of the conductive connector 320, when the conductive connector 320 moves downward, the conductive connector 320 can squeeze the first magnetic sealing block 340 and the second magnetic sealing block 350 through the chamfer 360, so that the conductive connector 320 is squeezed between the first magnetic sealing block 340 and the second magnetic sealing block 350 and passes through the notch 211 to enter the interior of the installation chamber 212.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An oil-resistant submersible pump cable, characterized in that: include: Cable body; A heating component is arranged outside the cable body and extends along the length direction of the cable body; A heating ring is coaxially arranged on the outside of the output oil pipe of the oil-resistant submersible pump; A gusset plate, wherein there are multiple gusset plates, and the multiple gusset plates are sequentially arranged outside the heating coil along the length direction of the heating coil; The buckle plate can be selectively buckled with the heating component at the required position on the cable body, so that the heating component and the heating ring at the required position of the output oil pipe are in an electrically connected state, thereby heating the required position of the output oil pipe; the heating component includes an insulating elastic sleeve, a positive conductive strip, a negative conductive strip and an insulating elastic body, the insulating elastic sleeve is arranged on the outside of the cable body, a notch is provided on one side of the insulating elastic sleeve, and the notch can be opened or closed, an installation chamber is provided inside the insulating elastic sleeve, and a mounting plate is provided at the bottom of the mounting chamber, the positive conductive strip and the negative conductive strip are respectively slidably arranged on the left and right sides of the mounting plate, the positive conductive strip and the negative conductive strip both extend along the length direction of the cable body, the insulating elastic member is arranged on the mounting plate, and is located between the positive conductive strip and the negative conductive strip and is slidably connected to both the positive conductive strip and the negative conductive strip; the positive conductive strip and the negative conductive strip can be synchronously approached to each other, so that the positive conductive strip and the negative conductive strip are conductive; The positive conductive strip and the negative conductive strip can also move away from each other synchronously so that the positive conductive strip and the negative conductive strip are disconnected; a positive magnetic block is arranged in the positive conductive strip, and a negative magnetic block is arranged in the negative conductive strip.

2. The oil-resistant submersible pump cable according to claim 1, characterized in that: The cable body comprises a conductor, an insulating layer, an inner sheath, a steel wire armor and an outer sheath, wherein the insulating layer is wrapped around the outside of the conductor, the inner sheath is arranged outside the insulating layer, the steel wire armor is arranged outside the inner sheath, and the outer sheath is arranged outside the steel wire armor.

3. The oil-resistant submersible pump cable according to claim 1, characterized in that: The opposing surfaces of the positive electrode conductive strip and the negative electrode conductive strip are inclined surfaces, and the inclined surfaces are inclined from bottom to top toward a side close to the elastic member; The lower longitudinal section of the conductive connecting piece is triangular or spherical.

4. The oil-resistant submersible pump cable according to claim 1, characterized in that: A first magnetic sealing block and a second magnetic sealing block are respectively arranged on two inner side surfaces of the notch, and opposite surfaces of the first magnetic sealing block and the second magnetic sealing block have opposite magnetic properties.

5. The oil-resistant submersible pump cable according to claim 4, characterized in that: The tops of the opposing surfaces of the first magnetic sealing block and the second magnetic sealing block are provided with oblique chamfers.

6. The oil-resistant submersible pump cable according to claim 1, characterized in that: The buckle plate includes an insulating shell and a conductive connector. The insulating shell is arranged outside the heating coil. A buckle slot is provided on a side of the insulating shell away from the heating coil. The outer dimensions of the buckle slot are adapted to the outer dimensions of the insulating elastic sleeve. The conductive connecting piece is arranged at the bottom of the buckle slot, and the conductive connecting piece is electrically connected to the heating coil; After the insulating elastic sleeve is buckled in the buckling notch, the conductive connector passes through the notch and extends into the installation chamber, and is electrically connected to the positive electrode conductive strip and the negative electrode conductive strip at the same time.

7. The oil-resistant submersible pump cable according to claim 6, characterized in that: Insulating isolation blocks are arranged at both ends of the conductive connector along the length direction of the insulating sleeve.

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