Anode anti-stuck device for wells

Abstract

The present invention discloses an anode anti-stuck device for wells, which includes a core tube, a sliding assembly, a sealing joint and a partition assembly; a fluid channel for circulating a solution is provided inside the core tube; the sliding assembly includes a sliding push tube, an anode assembly and an energy storage element, and the energy storage element can deform along the axis of the core tube to store energy; an extrusion cavity is provided between the core tube, the sealing joint and the sliding push tube, and the partition assembly divides the fluid channel into two blind passages that are not connected to each other, and the blind passage close to the fluid outlet side of the core tube is connected to the extrusion cavity. High-pressure extrusion medium enters the extrusion cavity through the pressure port, and since the sliding push tube, the anode assembly and the energy storage element can slide relative to the core tube, the energy storage element releases the stored energy, pushes the sliding push tube and the anode assembly to reset, and causes the anode assembly to continuously rub and vibrate with the inner wall of the casing, successfully unblocking, thereby solving the technical problem of eccentric wear between the anode tool and the inner wall of the casing, resulting in jamming.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum extraction, and in particular relates to an anode anti-sticking device for wells. Background Art

[0002] At present, an anode anti-corrosion device is often installed in the wellhead casing of oil fields and mines. It is connected to the oil pipe and brought down into the oil and water well. The contact arm contacts the inner wall of the casing to achieve the purpose of sacrificial anode protection of the casing and realize the goal of corrosion prevention inside the casing. However, in actual use, it is found that for some inclined wells or oil wells with serious wax and scaling downhole, traditional anode tools are easily stuck with the inner wall of the casing or stuck by wax and scaling. Under normal circumstances, a lot of resources are required to salvage and lift them, and the maintenance cycle is long, which wastes manpower and material resources. Summary of the Invention

[0003] The purpose of the present invention is to provide an anode anti-sticking device for wells to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned object, the present invention provides an anode anti-sticking device for a well, comprising:

[0005] A core tube, wherein a fluid channel for circulating a solution is provided inside the core tube;

[0006] A sliding assembly comprising a sliding push tube, an anode assembly, and an energy storage element, wherein the sliding push tube, the anode assembly, and the energy storage element are sequentially slidably sleeved on the outer side of the core tube along the axial direction of the core tube; the sliding push tube is disposed at an end of the core tube close to the fluid outlet; an end of the energy storage element away from the anode assembly is detachably connected to the core tube, and the energy storage element is capable of deforming along the axial direction of the core tube to store energy;

[0007] A sealing joint, wherein the sealing joint is detachably sleeved on one end of the core tube fluid outlet, and the end of the sealing joint close to the anode assembly is sleeved on the outside of the sliding push tube, an extrusion cavity is provided between the core tube, the sealing joint and the sliding push tube, the core tube is provided with a pressure port for conducting the fluid channel and the extrusion cavity, and the sealing joint is provided with a pressure relief port, and the pressure port and the pressure relief port are arranged in sequence from the fluid outlet to the fluid inlet;

[0008] A partition assembly is detachably connected to one side of the core tube fluid outlet, and the partition assembly divides the fluid channel into two blind passages that are not connected to each other, and the blind passage close to the core tube fluid outlet is connected to the extrusion chamber.

[0009] Optionally, one end of the core tube close to the fluid outlet is detachably connected to a first coupling, and the first coupling and the sealing joint are detachably connected.

[0010] Optionally, one end of the core tube close to the fluid inlet is detachably connected to a second coupling, the outer side of the core tube is provided with a support sleeve, one side of the support sleeve is detachably connected to the second coupling, and the other end of the support sleeve is detachably connected to the energy storage element.

[0011] Optionally, the energy storage element is a spring.

[0012] Optionally, the partition assembly includes a sealing seat, which is detachably connected to the inside of the core tube and is arranged on a side of the pressure port away from the fluid outlet.

[0013] Optionally, the sealing seat is a sealing ball seat, which is provided with a flow hole, and the flow hole is used to connect the two blind passages; the sealing ball seat is clamped with a sealing ball, the flow hole is in a closed state, and the two blind passages are not connected.

[0014] Optionally, a ball seat fixing tube and an internal support tube are inserted into the core tube, and the ball seat fixing tube and the internal support tube are respectively arranged on both sides of the sealing ball seat and abut against it. The ball seat fixing tube is arranged at one end close to the fluid outlet, and the diameter of the sealing ball is smaller than the inner diameter of the ball seat fixing tube.

[0015] Optionally, a receiving cavity for receiving descaling particles is provided between the inner support tube and the core tube, and a plurality of communication holes are provided on the inner support tube, and the communication holes are used to connect the fluid channel and the receiving cavity.

[0016] Optionally, the anode assembly comprises:

[0017] An insulating tube, wherein the insulating tube is slidably sleeved on the outer side of the core tube, one end of the insulating tube abuts against the sliding push tube, and the other end of the insulating tube is detachably connected to the energy storage element;

[0018] A sacrificial anode tube, wherein the sacrificial anode tube is sleeved on the outside of the insulating tube, and a first insulating sleeve is provided between one end of the sacrificial anode tube and the sliding push tube;

[0019] A support element, wherein the support element is sleeved on the outside of the insulating tube, the other end of the sacrificial anode tube is detachably connected to one end of the support element, and a second insulating sleeve is provided between the other end of the support element and the energy storage element;

[0020] An elastic contact arm is detachably connected to the outside of the supporting element, and is used to contact the inner wall of the external sleeve to make the sacrificial anode tube electrically conductive with the external sleeve.

[0021] Optionally, the supporting element comprises:

[0022] An energy storage support tube, wherein the energy storage support tube is sleeved on the outside of the insulating tube and is arranged between the sliding push tube and the energy storage element;

[0023] The pressure ring is provided in two groups and is respectively arranged at both ends of the energy storage support tube, and the end of the elastic contact arm is clamped between the energy storage support tube and the pressure ring.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects:

[0025] When the well anode anti-stuck device provided by the present invention is in use, the fluid channel is divided into two blind passages that are not connected to each other by the partition component. The blind passage close to the fluid outlet side of the core tube is connected to the extrusion chamber and is externally connected to an extrusion medium source. High-pressure extrusion medium is supplied to the blind passage connected thereto through the extrusion medium source, and the high-pressure extrusion medium enters the extrusion chamber through the pressure-applying port. Since the sliding push tube, the anode assembly and the energy storage element can slide relative to the core tube, under the action of the continuous supply of the high-pressure extrusion medium, the space of the extrusion chamber becomes larger, the sliding push tube starts to slide, and then pushes the anode assembly to slide, and the energy storage element starts to store energy until the pressure relief port is in the open state, the extrusion medium is ejected from the pressure relief port, and the extrusion medium source stops supplying the extrusion medium; the energy storage element releases the stored energy, pushes the sliding push tube and the anode assembly to reset, and further drives the anode assembly to slide. Repeating the above process can make the anode assembly and the inner wall of the casing continuously rub and vibrate, and successfully release the jam, thereby solving the technical problem of eccentric wear between the anode tool and the inner wall of the casing causing jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of the anode anti-sticking device for wells of the present invention;

[0028] Figure 2 This is a partial schematic diagram of the anode anti-sticking device for wells of the present invention;

[0029] Figure 3 Another partial schematic diagram of the anode anti-sticking device for wells of the present invention;

[0030] Figure 4 This is a structural schematic diagram of the anode anti-sticking device for a well in which the pressure relief port is in a sealed state;

[0031] Figure 5This is a structural schematic diagram of the anode anti-sticking device for a well in which the pressure relief port is in an open state;

[0032] Figure 6 This is a schematic diagram of the internal support tube structure of the present invention.

[0033] Among them, 1. first coupling, 2. ball seat fixing tube, 3. core tube, 4. sealing joint, 5. first sealing ring, 6. first sliding sealing ring, 7. second sliding sealing ring, 8. sealing ball seat, 9. sliding push tube, 10. accommodating chamber, 11. internal support tube, 12. first insulating sleeve, 13. sacrificial anode tube, 14. first pressure ring, 15. elastic contact arm, 16. energy storage support tube, 17. insulating tube, 18. second pressure ring, 19. second insulating sleeve, 20. fixed joint, 21. energy storage element, 22. support sleeve, 23. second coupling, 24. fluid channel, 25. extrusion chamber, 26. pressure port, 27. pressure relief port, 28. flow hole, 29. sealing ball. DETAILED DESCRIPTION

[0034] It should be noted that, unless there is a conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other. The embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0035] The present invention provides an anode anti-sticking device for wells, which is mainly used in oil wells; the device comprises a core pipe 3, a sliding component, a sealing joint 4 and a partition component.

[0036] A fluid channel 24 for circulating the solution is provided inside the core tube 3; the two ends of the fluid channel 24 are divided into a fluid inlet and a fluid outlet along the flow direction of the solution. The solution mentioned here is the solution mainly circulating inside the core tube 3, not the extrusion medium described later; in this specific embodiment, the solution refers to petroleum raw liquid.

[0037] The sliding assembly includes a sliding push tube 9, an anode assembly and an energy storage element 21. The sliding push tube 9, the anode assembly and the energy storage element 21 are slidably sleeved on the outside of the core tube 3 in sequence along the axial direction of the core tube 3; the sliding push tube 9 is arranged at one end of the core tube 3 close to the fluid outlet; the energy storage element 21 is detachably connected to the core tube 3 at one end away from the anode assembly, and the energy storage element 21 can deform along the axial direction of the core tube 3 to store energy.

[0038] The sealing joint 4 is detachably sleeved on one end of the fluid outlet of the core tube 3. The end of the sealing joint 4 close to the anode assembly is sleeved on the outside of the sliding push tube 9. An extrusion cavity 25 is provided between the core tube 3, the sealing joint 4 and the sliding push tube 9. The core tube 3 is provided with a pressure port 26 for conducting the fluid channel 24 and the extrusion cavity 25. The sealing joint 4 is provided with a pressure relief port 27. The pressure port 26 and the pressure relief port 27 are arranged in sequence from the fluid outlet to the fluid inlet.

[0039] The partition assembly is detachably connected to the fluid outlet side of the core tube 3 , and the partition assembly divides the fluid channel 24 into two blind passages that are not connected to each other. The blind passage close to the fluid outlet side of the core tube 3 is connected to the extrusion chamber 25 .

[0040] In this embodiment, the pressure relief port 27 has two states, namely a sealed state and an open state: when the pressure relief port 27 is in the sealed state, the sliding push tube 9 blocks the pressure relief port 27, and the pressure relief port 27 and the extrusion chamber 25 are not connected; when the pressure relief port 27 is in the open state, the pressure relief port 27 and the extrusion chamber 25 are connected; wherein, the sealed state and the open state of the pressure relief port 27 are switched by the position of the sliding push tube 9 relative to the pressure relief port 27.

[0041] Preferably, a first sealing ring 5 is provided at the connection between the sealing joint 4 and the core tube 3, and two sliding sealing rings, namely a first sliding sealing ring 6 and a second sliding sealing ring 7, are provided between the sealing joint 4 and the sliding push tube 9. This embodiment ensures the sealing of the extrusion chamber 25 through a multi-sealing structure, preventing the extrusion medium from flowing out of the gaps between the sealing joint 4 and the core tube 3 and between the sealing joint 4 and the sliding push tube 9 when the extrusion medium source supplies the extrusion chamber 25, thereby affecting the movement of the sliding push tube 9. The extrusion medium in this embodiment can be a fluid medium such as air or water.

[0042] When the well anode anti-stuck device provided by the present invention is used, the fluid channel 24 is divided into two blind channels that are not connected to each other by the partition component. The blind channel near the fluid outlet side of the core tube 3 is connected to the extrusion chamber 25 and the blind channel is externally connected to the extrusion medium source. The high-pressure extrusion medium is supplied to the blind channel connected thereto through the extrusion medium source. The high-pressure extrusion medium enters the extrusion chamber 25 through the pressure port 26. Since the sliding push tube 9, the anode assembly and the energy storage element 21 can slide relative to the core tube 3, under the continuous supply of the high-pressure extrusion medium, the extrusion chamber 25 As the space becomes larger, the sliding push tube 9 starts to slide, thereby pushing the anode assembly to slide, and the energy storage element 21 starts to store energy until the pressure relief port 27 is in the open state, the extrusion medium is ejected from the pressure relief port 27, and the extrusion medium source stops supplying the extrusion medium; the energy storage element 21 releases the stored energy, pushes the sliding push tube 9 and the anode assembly to reset, and further drives the anode assembly to slide, and repeats the above process, which can make the anode assembly and the inner wall of the casing continuously rub and vibrate, successfully unblocking, thereby solving the technical problem of eccentric wear between the anode tool and the inner wall of the casing, resulting in jamming.

[0043] To further optimize the solution, the end of the core tube 3 near the fluid outlet is detachably connected to a first coupling 1, and the first coupling 1 and the sealing joint 4 are detachably connected. The first coupling 1 is used to connect and conduct the core tube 3 with an external pipe or an external connector, and the sealing joint 4 is detachably connected to achieve relative fixation of the sealing joint 4 with respect to the core tube 3. Preferably, the first coupling 1 is threadedly connected and sleeved on the outside of the core tube 3, and the sealing joint 4 is threadedly connected and sleeved on the outside of the first coupling 1; the detachable connection between the first coupling 1 and the core tube 3, and the detachable connection between the sealing joint 4 and the first coupling 1 are achieved by threaded connection. Of course, the detachable connection between the first coupling 1 and the core tube 3, and between the sealing joint 4 and the first coupling 1 can also be achieved by plugging, clamping, etc.

[0044] A further optimized solution is that the end of the core tube 3 near the fluid inlet is detachably connected to a second coupling 23, and the outer side of the core tube 3 is provided with a support sleeve 22, one side of the support sleeve 22 is detachably connected to the second coupling 23, and the other end of the support sleeve 22 is detachably connected to the energy storage element 21. The second coupling 23 is used to connect and conduct the core tube 3 with an external pipe or external connector, and the detachable connection between the second coupling 23 and the support sleeve 22 is used to achieve relative fixation of the support sleeve 22 relative to the core tube 3, thereby achieving detachable connection between the end of the energy storage element 21 away from the anode assembly and the core tube 3, thereby ensuring that one end of the energy storage element 21 is fixed relative to the core tube 3, ensuring that the energy storage element 21 can deform along the axial direction of the core tube 3 to store energy, and can release energy later to push the anode assembly and the sliding push tube 9 to reset.

[0045] Preferably, the second coupling 23 is threadedly connected and sleeved on the outside of the core tube 3, and the support sleeve 22 is threadedly connected and sleeved on the outside of the second coupling 23; the detachable connection between the second coupling 23 and the core tube 3, and between the second coupling 23 and the support sleeve 22 is achieved by means of threaded connection. Of course, the detachable connection between the second coupling 23 and the core tube 3, and between the second coupling 23 and the support sleeve 22 can also be achieved by means of plugging, clamping, etc.

[0046] In a further optimized solution, the energy storage element 21 is a spring, which is sleeved outside the core tube. One end of the spring is detachably connected to the anode assembly, and the other end of the spring is detachably connected to the core tube 3. In this embodiment, the other end of the spring is fixedly connected to the support sleeve 22. When the anode assembly squeezes the spring, the spring deforms axially along the core tube 3 to store energy. Of course, the energy storage element 21 in this application can also adopt other structures, such as a plastic bellows.

[0047] The partition assembly can adopt an integrated structure or a split structure to divide the fluid channel 24 into two mutually unconnected blind passages. When the partition assembly adopts an integrated structure, a sealing plate, a sealing cylinder, or the like can be adopted. For example, when the partition assembly adopts a sealing cylinder, the sealing cylinder is detachably inserted into the core tube 3, and the bottom of the sealing cylinder is a sealed structure. The sealing cylinder divides the fluid channel 24 into two mutually unconnected blind passages. A through hole is provided on the inner wall of the sealing cylinder, which is in communication with the pressure port 26, so that the extruded medium can pass through the sealing cylinder, the through hole, and the pressure port 26 and enter the extrusion chamber 25.

[0048] Preferably, the partition assembly includes a sealing seat, which is detachably connected to the inside of the core tube 3 and is arranged on the side of the pressure port 26 facing away from the fluid outlet. In this embodiment, the sealing seat is detachably connected to the inside of the core tube 3, and the sealing ball seat divides the fluid channel 24 into two blind passages that are not connected to each other. The sealing ball seat is arranged on the side of the pressure port 26 facing away from the fluid outlet, so that the blind passage close to the fluid outlet side of the core tube 3 is connected to the extrusion chamber 25, ensuring that the extruded medium can enter the extrusion chamber 25 through the pressure port 26; the sealing seat has a simple structure and is easy to operate. The sealing seat in this embodiment can be detachably connected to the inside of the core tube 3 by plugging, threading, snapping, etc.

[0049] When the partition assembly adopts a split structure, the conduction and non-conduction of the two blind passages are achieved through the split structure. Preferably, the sealing seat is a sealing ball seat 8, and the sealing ball seat 8 is provided with a flow hole 28, and the flow hole 28 is used to conduct the two blind passages; the sealing ball seat 8 is clamped with a sealing ball 29, and the flow hole 28 is in a closed state, and the two blind passages are not conductive. In this embodiment, the sealing seat is a sealing ball seat 8 with a flow hole 28, and the sealing ball seat 8 is detachably connected to the core tube 3. When the unblocking operation is not required, the sealing ball 29 and the sealing ball seat 8 are in a non-clamped state, and the flow hole 28 is in a conductive state, that is, the fluid channel 24 can pass the solution normally. When the unblocking operation is required, the sealing ball 29 is clamped in the sealing ball seat 8, the flow hole 28 is in a closed state, and the two blind passages are not connected, ensuring that the extruded medium can enter the extrusion cavity 25 through the pressure port 26. By controlling whether the sealing ball 29 and the sealing ball seat 8 are clamped, the flow hole is controlled to be connected, ensuring that the sealing ball 29 and the sealing ball seat 8 can play the role of isolating the fluid channel 24. At the same time, in the non-unblocking state, only the sealing ball 29 and the sealing ball seat 8 need to be separated to ensure that the fluid channel can circulate the solution normally, and the operation is simple.

[0050] Preferably, a ball seat fixing tube 2 and an internal support tube 11 are inserted into the core tube 3. The ball seat fixing tube 2 and the internal support tube 11 are respectively arranged on both sides of the sealing ball seat 8 and abut against it. The ball seat fixing tube 2 is arranged at the end near the fluid outlet, and the diameter of the sealing ball 29 is smaller than the inner diameter of the ball seat fixing tube 2. In this embodiment, a first coupling 1 and a second coupling 23 are arranged at both ends of the core tube 3. The first coupling 1 and the second coupling 23 squeeze the ball seat fixing tube 2, the sealing ball seat 8, and the internal support tube 11 together and limit their position, thereby ensuring that the ball seat fixing tube 2, the sealing ball seat 8, and the internal support tube 11 are fixed relative to the core tube 3. Of course, the ball seat fixing tube 2 can also be detachably connected to the core tube 3 by means of plug-in connection, threaded connection, etc. The diameter of the sealing ball 29 is smaller than the inner diameter of the ball seat fixing tube 2, ensuring that the sealing ball 29 can move in the ball seat fixing tube 2, making it easy to put the sealing ball 29 into the sealing ball seat 8 for engagement, and the sealing ball 29 is fixedly connected to a traction line. After the card is successfully untied and the pipeline is pulled out, the traction line can be used to control the sealing ball 29 and the sealing ball seat 8 to separate, ensuring that the sealing ball 29 can be taken out from the ball seat fixing tube 2.

[0051] A further optimization scheme includes a chamber 10 for accommodating descaling particles between the internal support tube 11 and the core tube 3. The internal support tube 11 is provided with a plurality of communication holes that connect the fluid channel 24 to the chamber 10. The chamber 10 is filled with descaling particles. When a solution such as crude oil enters the core tube 3, the descaling agent dissolves. A cross baffle installed in the internal support tube 11 prevents large particles from being directly flushed out, ensuring stable descaling agent output, improving oil pipeline blockage, and preventing crude oil from forming crystal scale inside the core tube 3.

[0052] According to a further optimized solution, the anode assembly includes an insulating tube 17 , a sacrificial anode tube 13 , a supporting element and an elastic contact arm 15 .

[0053] The insulating tube 17 is slidably sleeved on the outside of the core tube 3, one end of the insulating tube 17 abuts against the sliding push tube 9, and the other end of the insulating tube 17 is detachably connected to the energy storage element 21; the insulating tube 17 insulates the core tube 3 from other components or structures in the anode assembly to protect the core tube 3.

[0054] The sacrificial anode tube 13 is sheathed outside the insulating tube 17, with a first insulating sleeve 12 disposed between one end of the sacrificial anode tube 13 and the sliding push tube 9. A sacrificial anode is a metal that, in electrochemical theory, is gradually consumed as the current flows out. The sacrificial anode tube 13 in this application is sheathed within the insulating tube 17, protecting the outer casing from corrosion by consuming the sacrificial anode tube 13, thereby achieving the goal of corrosion prevention within the casing. The first insulating sleeve 12 insulates the sacrificial anode tube 13 from the sliding push tube 9, preventing the sliding push tube 9 from being used as an anode and corroding.

[0055] The support element is sheathed around the insulating tube 17. The other end of the sacrificial anode tube 13 is detachably connected to one end of the support element. A second insulating sleeve 19 is positioned between the other end of the support element and the energy storage element 21. This second insulating sleeve 19 insulates the support element from the energy storage element 21, preventing the energy storage element 21 from acting as an anode and corroding. The support element, positioned between the sacrificial anode tube 13 and the energy storage element 21, supports both, applying the thrust of the sacrificial anode tube 13 to the energy storage element 21 and preventing the elastic contact arm 15 from deforming and absorbing energy.

[0056] Resilient contact arms 15 are detachably attached to the outside of the support element. They contact the inner wall of the outer casing, establishing electrical continuity between the sacrificial anode tube 13 and the outer casing. This electrical connection between the outer casing and the sacrificial anode tube 13 is achieved through the elastic contact arms 15, thereby consuming the sacrificial anode tube 13 and preventing corrosion of the outer casing. Three elastic contact arms 15 are provided, arranged in a circular pattern on the outside of the support element.

[0057] In this technical solution, the sacrificial anode tube 13, supporting element and insulating tube 17 in the anode assembly are all rigid structures. Theoretically, no deformation of the core tube 3 in the axial direction occurs. The sliding push tube 9 pushes the anode assembly to move, thereby pushing the energy storage element 21 to deform along the axial direction of the core tube 3 to store energy.

[0058] Preferably, the support element comprises:

[0059] The energy storage support tube 16 is sleeved on the outside of the insulating tube 17 and is arranged between the sliding push tube 9 and the energy storage element 21;

[0060] There are two groups of pressure rings, which are respectively arranged at both ends of the energy storage support tube 16. The end of the elastic contact arm 15 is clamped between the energy storage support tube 16 and the pressure ring. The pressure ring is provided with two first pressure rings 14 and second pressure rings 18, which are respectively arranged at both ends of the elastic contact arm 15.

[0061] In this specific embodiment, the ends of the elastic contact arm 15 are fixed by a pressure ring and an energy storage support tube 16, so that the elastic contact arm 15 is distributed in an arc shape, and the elastic contact arm 15 is connected to the sleeve by abutment, thereby achieving electrical conduction between the elastic contact arm 15 and the external sleeve. The energy storage support tube 16 and the pressure ring support the ends of the elastic contact arm 15 to prevent deformation of the elastic contact arm 15. The energy storage support tube 16 fully applies the force applied to it to the energy storage element 21, preventing the elastic contact arm 15 from deforming due to external forces.

[0062] The description of the above embodiments is only used to help understand the method of this application and its core idea; at the same time, for those skilled in the art, according to the idea of ​​this application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

[0063] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0064] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 on the present invention.

[0065] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A well anode anti-sticking device, characterized in that: include A core tube (3), wherein a fluid channel (24) for circulating a solution is provided inside the core tube (3); A sliding assembly, the sliding assembly comprising a sliding push tube (9), an anode assembly and an energy storage element (21), the sliding push tube (9), the anode assembly and the energy storage element (21) being sequentially slidably sleeved on the outer side of the core tube (3) along the axial direction of the core tube (3); the sliding push tube (9) being arranged at an end of the core tube (3) close to the fluid outlet; the energy storage element (21) being detachably connected to the core tube (3) at an end away from the anode assembly, and the energy storage element (21) being capable of deforming along the axial direction of the core tube (3) to store energy; A sealing joint (4), wherein the sealing joint (4) is detachably sleeved on one end of the fluid outlet of the core tube (3), and the end of the sealing joint (4) close to the anode assembly is sleeved on the outside of the sliding push tube (9); an extrusion cavity (25) is provided between the core tube (3), the sealing joint (4) and the sliding push tube (9); a pressure port (26) for conducting the fluid channel (24) and the extrusion cavity (25) is provided on the core tube (3); a pressure relief port (27) is provided on the sealing joint (4); and the pressure port (26) and the pressure relief port (27) are arranged in sequence from the fluid outlet to the fluid inlet; A partition assembly, wherein the partition assembly is detachably connected to one side of the fluid outlet of the core tube (3), and the partition assembly divides the fluid channel (24) into two blind passages that are not connected to each other, and the blind passage close to the fluid outlet of the core tube (3) is connected to the extrusion chamber (25); the partition assembly includes a sealing seat, which is detachably connected to the inside of the core tube (3), and the sealing seat is arranged on the side of the pressure port (26) away from the fluid outlet, and the sealing seat is a sealing ball seat (8), and the sealing ball seat (8) is provided with a flow hole (28), and the flow hole (28) is used to connect the two blind passages; the sealing ball seat (8) is clamped with a sealing ball (29), and the flow hole (28) is in a closed state, and the two blind passages are not connected.

2. The anode anti-sticking device for wells according to claim 1, characterized in that: One end of the core tube (3) close to the fluid outlet is detachably connected to a first coupling (1), and the first coupling (1) and the sealing joint (4) are detachably connected.

3. The anode anti-sticking device for wells according to claim 1, characterized in that: One end of the core tube (3) close to the fluid inlet is detachably connected to a second coupling (23); a support sleeve (22) is sleeved on the outer side of the core tube (3); one side of the support sleeve (22) is detachably connected to the second coupling (23); and the other end of the support sleeve (22) is detachably connected to the energy storage element (21).

4. The anode anti-sticking device for wells according to claim 1, characterized in that: The energy storage element (21) is a spring.

5. The anode anti-sticking device for wells according to claim 1, characterized in that: A ball seat fixing tube (2) and an internal support tube (11) are inserted into the core tube (3); the ball seat fixing tube (2) and the internal support tube (11) are respectively arranged on both sides of the sealing ball seat (8) and abut against it; the ball seat fixing tube (2) is arranged at one end close to the fluid outlet; and the diameter of the sealing ball (29) is smaller than the inner diameter of the ball seat fixing tube (2).

6. The anode anti-sticking device for wells according to claim 5, characterized in that: A receiving cavity (10) for receiving descaling particles is provided between the internal support tube (11) and the core tube (3), and a plurality of communication holes are provided on the internal support tube (11), and the communication holes are used to connect the fluid channel (24) and the receiving cavity (10).

7. The anode anti-sticking device for wells according to claim 1, characterized in that: The anode assembly comprises: an insulating tube (17), wherein the insulating tube (17) is slidably sleeved on the outer side of the core tube (3), one end of the insulating tube (17) abuts against the sliding push tube (9), and the other end of the insulating tube (17) is detachably connected to the energy storage element (21); A sacrificial anode tube (13), wherein the sacrificial anode tube (13) is sleeved on the outside of the insulating tube (17), and a first insulating sleeve (12) is provided between one end of the sacrificial anode tube (13) and the sliding push tube (9); a support element, the support element being sleeved on the outside of the insulating tube (17), the other end of the sacrificial anode tube (13) being detachably connected to one end of the support element, and a second insulating sleeve (19) being provided between the other end of the support element and the energy storage element (21); An elastic contact arm (15) is detachably connected to the outside of the supporting element, and the elastic contact arm (15) is used to contact the inner wall of the external sleeve to make the sacrificial anode tube (13) electrically conductive with the external sleeve.

8. The anode anti-sticking device for wells according to claim 7, characterized in that: The support element comprises: An energy storage support tube (16), wherein the energy storage support tube (16) is sleeved on the outside of the insulating tube (17), and the energy storage support tube (16) is arranged between the sliding push tube (9) and the energy storage element (21); Compression rings are provided in two groups and are respectively arranged at both ends of the energy storage support tube (16); the ends of the elastic contact arms (15) are clamped between the energy storage support tube (16) and the compression rings.

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