Underground corrosion monitoring device

Abstract

The utility model is suitable for the technical field of resource exploitation, and provides an underground corrosion monitoring device which comprises a mounting rod, and a corrosion detector is arranged on the mounting rod; the adjustable mounting plate is arranged on the mounting rod; the electric capstan is used for regulating and controlling lifting, the electric capstan is fixedly mounted on the mounting plate, and a twisted rope is arranged on the electric capstan; the hanging bracket is fixedly mounted at the bottom end of the twisted rope; the assembly plate is fixedly installed on the hanging bracket, a corrosion probe used for monitoring the underground corrosion condition is arranged on the assembly plate, and the corrosion probe is matched with the corrosion detector. According to the underground corrosion monitoring device provided by the scheme, the problem that in the prior art, a corrosion probe is installed in a ventilation shaft, so that maintenance and replacement are inconvenient is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of resource exploitation, and in particular relates to an underground corrosion monitoring device. Background Art

[0002] During the oil and gas extraction process, the establishment of ventilation wells is crucial to ensure the safety and stability of underground operations; ventilation wells not only provide the necessary fresh air for the underground, but also help to remove harmful gases and heat to maintain a suitable working environment underground; however, the interior of the ventilation well also faces the challenges of complex environments such as high temperature, high humidity, and corrosive gases. These factors may cause corrosion of equipment, pipelines and other structures in the ventilation well, thereby affecting their performance and safety; in order to monitor the corrosion conditions in the ventilation well in real time, existing monitoring devices usually use corrosion probes as the main monitoring tools; corrosion probes can measure the electrochemical parameters of the object being measured in real time by directly contacting the surface of the object being measured, thereby determining the degree and rate of corrosion.

[0003] However, once the corrosion probe is installed in the ventilation shaft, its maintenance and replacement becomes extremely inconvenient; due to the special environment and structure of the ventilation shaft, there is a great safety risk for personnel to enter the shaft for maintenance operations, and the operation process is complicated, tedious, time-consuming and labor-intensive. Utility Model Content

[0004] The utility model provides a downhole corrosion monitoring device, aiming to solve the problem of inconvenience in maintenance and replacement caused by the corrosion probe being installed in a ventilation shaft in the prior art.

[0005] The utility model is implemented as follows: a downhole corrosion monitoring device comprises: a mounting rod, on which a corrosion detector is arranged; an adjustable mounting plate, on which the mounting plate is arranged; an electric winch for regulating lifting and lowering, the electric winch is fixedly mounted on the mounting plate, and a winding rope is arranged on the electric winch; a hanger, on which the hanger is fixedly mounted on the bottom end of the winding rope; an assembly plate, on which the assembly plate is fixedly mounted on the hanger, and on which a corrosion probe for monitoring downhole corrosion is arranged, and the corrosion probe is adapted to the corrosion detector; and a limiting mechanism for limiting the position of the assembly plate, the limiting mechanism being arranged on the assembly plate.

[0006] Preferably, the limiting mechanism comprises: a slide groove provided on the assembly plate; a slide plate slidably mounted in the slide groove; a mounting frame fixed on one end of the slide plate; and a roller rotatably mounted on the mounting frame.

[0007] Preferably, a limiting groove is provided on the slide plate, and a first bolt for limiting is mounted on the assembly plate, and the bottom end of the first bolt extends into the limiting groove.

[0008] Preferably, a sleeve plate is sleeved on the mounting rod, one end of the sleeve plate is fixedly connected to one end of the mounting plate, a second bolt for limiting position is arranged on the sleeve plate, one end of the second bolt contacts the outer wall of the mounting rod.

[0009] Preferably, a protective shell for covering the electric winch is fixedly mounted on the top of the mounting plate, and a sunshade and rainproof shielding plate is fixedly mounted on the top of the protective shell.

[0010] Preferably, an inspection opening is provided on one side of the protective shell, an openable and closable shielding door is provided in the inspection opening, a hinge and a handle are provided on the shielding door, and the hinge is fixedly connected to the protective shell.

[0011] Preferably, the mounting plate is provided with a rope hole through which the twisted rope can pass, and the assembly plate is provided with an assembly hole for mounting the corrosion probe.

[0012] Compared with the related art, the underground corrosion monitoring device provided by the utility model has the following beneficial effects:

[0013] The design of the mounting rod and mounting plate ensures stable support for the entire monitoring device. The configuration of the electric winch and the winch rope enables safe lifting and lowering of the corrosion probe, reduces the need for personnel to enter the ventilation shaft, and improves operational safety; the combination of the corrosion detector and the corrosion probe enables real-time monitoring and data analysis of the corrosion situation in the ventilation shaft; the introduction of the mounting plate and the limit mechanism enables the monitoring device to adjust the installation position and angle according to specific needs, improving the adaptability and flexibility of the device; the design of the protective shell and the shielding plate protects the electric winch from the influence of the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the main structure of a downhole corrosion monitoring device provided by the utility model;

[0015] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in FIG.

[0017] Figure 4 for Figure 2 An enlarged schematic diagram of the structure of part B shown in FIG.

[0018] Figure 5 It is a structural schematic diagram of the sleeve plate and the mounting plate in the utility model.

[0019] Figure numerals: 1. Mounting rod; 2. Corrosion detector; 3. Mounting plate; 4. Electric winch; 5. Winch 5; 6. Hanger; 7. Assembly plate; 8. Corrosion probe; 9. Slide; 10. Slide plate; 11. Mounting frame; 12. Roller; 13. First bolt; 14. Sleeve plate; 15. Second bolt; 16. Protective shell; 17. Shielding plate. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides a downhole corrosion monitoring device, such as Figure 1-5 As shown, the downhole corrosion monitoring device includes: a mounting rod 1, on which a corrosion detector 2 is arranged; an adjustable mounting plate 3, on which the mounting plate 3 is arranged; an electric winch 4 for regulating lifting, the electric winch 4 is fixedly mounted on the mounting plate 3, and a rope 5 is arranged on the electric winch 4; a hanger 6, which is fixedly mounted on the bottom end of the rope 5; an assembly plate 7, which is fixedly mounted on the hanger 6, and on which a corrosion probe 8 for monitoring downhole corrosion is arranged, and the corrosion probe 8 is compatible with the corrosion detector 2; a limiting mechanism for limiting the assembly plate 7, and the limiting mechanism is arranged on the assembly plate 7.

[0023] It should be noted that in the process of oil and natural gas extraction, ventilation wells are usually located deep underground, and their internal environment is harsh, including high temperature, high humidity, corrosive gases, etc. These factors greatly shorten the service life of corrosion probes. Once the corrosion probe fails or needs to be replaced, it needs to be repaired and replaced; however, due to the special environment and structure of the ventilation well, there is a great safety risk for personnel to enter the well for maintenance operations. There may be dangerous factors such as toxic gases, hypoxia, and high temperature inside the ventilation well, which may pose a serious health threat or even life-threatening to personnel entering the well; even if necessary safety measures are taken, such as wearing protective equipment and conducting gas detection, it is still a complicated, tedious, time-consuming and labor-intensive process for personnel to enter the well for maintenance. First, it is necessary to build a safe passage and platform to ensure that personnel can enter the well safely. Then, it is necessary to find the exact location of the corrosion probe, which may require the use of specific tools and equipment for detection and positioning. Next, the corrosion probe is disassembled and replaced, which may require special skills and tools, and requires caution to avoid damage to surrounding equipment; finally, after the replacement is completed, testing and verification are required to ensure that the new corrosion probe can work properly; the entire inspection and replacement process not only requires a lot of manpower and material resources, but may also have a serious impact on the normal operation of the ventilation shaft and the mining progress. Therefore, how to reduce the difficulty of inspection and replacement of corrosion probes and improve the reliability and stability of the monitoring device has become an urgent problem to be solved; in order to solve the above problems, the utility model proposes a downhole corrosion monitoring device;

[0024] In this embodiment, the mounting rod 1: as the basic supporting structure of the entire monitoring device, the mounting rod 1 ensures that the corrosion detector 2 and other components can be stably installed on the side of the ventilation shaft; the (ER type) corrosion detector 2 is used to receive and analyze the corrosion data sent by the (CMA2000-ER type) corrosion probe 8, so as to monitor the corrosion situation in the ventilation shaft in real time; the mounting plate 3 allows the user to adjust the installation position and angle of the corrosion detector 2 and other components according to specific needs; the electric winch 4 drives the lifting and lowering of the hanger 6 through the winch rope 5, so as to realize the position adjustment of the corrosion probe 8 in the ventilation shaft; this method is not only safe, but also efficient, and greatly reduces the need for personnel to enter the ventilation shaft; the hanger 6 and the assembly plate 7 together constitute the support and installation platform of the corrosion probe 8; by lifting and lowering the hanger 6, the corrosion probe 8 can be easily sent into or taken out of different positions in the ventilation shaft; the corrosion probe 8 is in direct contact with the environment in the ventilation shaft to monitor the corrosion situation and send the data to the corrosion detector 2; ensure the stability and safety of the assembly plate 7 during the lifting process to prevent it from excessive lifting or swinging; through remote control and automated operation, personnel do not need to enter the ventilation shaft, thereby avoiding the risk of direct contact with dangerous factors such as toxic gases, hypoxia, and high temperature; the rapid lifting function of the electric winch 4 and the rope 5 makes the maintenance and replacement process of the corrosion probe 8 faster and more efficient. At the same time, since there is no need to build a safe passage and platform, the additional workload and time cost are reduced; the corrosion detector 2 accurately analyzes the data sent by the corrosion probe 8, and can more accurately understand the corrosion situation in the ventilation shaft, providing strong data support for oil and natural gas extraction; the adjustable mounting plate 3 and the limit mechanism ensure the stability and reliability of the monitoring device in the ventilation shaft, reducing the risk of equipment damage and failure caused by environmental factors.

[0025] In a further preferred embodiment of the utility model, the limiting mechanism includes: a slide groove 9 opened on the assembly plate 7; a slide plate 10 slidably installed in the slide groove 9; a mounting frame 11 fixed on one end of the slide plate 10; and a roller 12 rotatably installed on the mounting frame 11.

[0026] In this embodiment, by introducing a specific limiting mechanism design, the stability and safety of the underground corrosion monitoring device are further improved; the chute 9 is opened on the assembly plate 7 as a track for the sliding plate 10 to slide; the design of the chute 9 ensures the stability and directionality of the sliding plate 10 during movement, preventing it from deviating from the predetermined path; the sliding plate 10 is slidably installed in the chute 9 and is the main moving part of the limiting mechanism. The sliding of the sliding plate 10 can achieve the limiting and fixing of the assembly plate 7; the mounting frame 11 is fixed on one end of the sliding plate 10 and is used to install the roller 12. The design of the mounting frame 11 enables the roller 12 to move with the movement of the sliding plate 10 while maintaining a stable installation position; the roller 12 is rotatably installed on the mounting frame 11 and contacts the wall of the ventilation shaft to limit the movement of the assembly plate 7; the design of the roller 12 reduces the friction with the shaft wall, making the assembly plate 7 smoother during movement, and also reduces the wear on the shaft wall; through the sliding cooperation of the chute 9 and the sliding plate 10, and the limiting effect of the roller 12, the limiting mechanism can ensure the stability of the assembly plate 7 during the lifting process. This helps prevent the assembly plate 7 from shaking or shifting due to external factors such as wind and vibration, thereby ensuring that the corrosion probe 8 can accurately monitor the corrosion conditions in the ventilation shaft; the contact between the roller 12 and the wall of the ventilation shaft limits the movement range of the assembly plate 7, avoiding the safety risks caused by excessive lifting or swinging. In addition, the design of the roller 12 reduces the friction with the shaft wall and reduces the wear on the shaft wall, thereby extending the service life of the ventilation shaft; by adjusting the position of the slide plate 10 in the slide groove 9, the contact position between the roller 12 and the shaft wall can be easily adjusted, thereby achieving precise control of the lifting range of the assembly plate 7. This design simplifies the operation process, reduces the difficulty of operation, and improves work efficiency.

[0027] In a further preferred embodiment of the utility model, a limiting groove is provided on the slide plate 10, and a first bolt 13 for limiting is mounted on the assembly plate 7, and the bottom end of the first bolt 13 extends into the limiting groove.

[0028] In this embodiment, the limiting mechanism is optimized, and the limiting groove on the slide plate 10 is used in conjunction with the first bolt 13 on the assembly plate 7 to achieve a more stable and reliable limiting of the assembly plate 7; the limiting groove is directly provided on the slide plate 10, and the design of this groove is to cooperate with the first bolt 13 to ensure the stability of the slide plate 10 when sliding in the slide groove 9; the assembly plate 7 is equipped with the first bolt 13, which is used to fix the slide plate 10 at a specific position in the slide groove 9. The bottom end of the first bolt 13 extends into the limiting groove on the slide plate 10, and the slide plate 10 can be firmly locked at a certain position in the slide groove 9 by tightening the bolt; the first bolt 13 is tightly combined with the upper limiting groove on the slide plate 10, so that the assembly plate 7 can be ensured to remain stable during the lifting process, and it is not easy to shake or deviate; this design enables the corrosion probe 8 to more accurately monitor the corrosion situation in the ventilation shaft, and improves the reliability of the monitoring data; the limiting effect of the first bolt 13 can effectively prevent the slide plate 10 from accidentally sliding or leaving the slide groove 9, thereby avoiding the risk of the assembly plate 7 and the corrosion probe 8 thereon falling or being damaged. This design ensures the safety of operators and reduces the cost of maintenance and replacement; the position of the slide plate 10 can be easily adjusted by tightening or loosening the first bolt 13. This design makes the lifting and fixing of the assembly plate 7 simpler and faster, and improves work efficiency.

[0029] In a further preferred embodiment of the utility model, a sleeve plate 14 is sleeved on the mounting rod 1, one end of the sleeve plate 14 is fixedly connected to one end of the mounting plate 3, and a second bolt 15 for limiting is provided on the sleeve plate 14, one end of the second bolt 15 is in contact with the outer wall of the mounting rod 1.

[0030] In this embodiment, by introducing the design of the sleeve plate 14 and the second bolt 15, the downhole corrosion monitoring device in this embodiment has been significantly improved in terms of stability and adjustability; the sleeve plate 14 is designed to be sleeved on the mounting rod 1, and one end of it is fixedly connected to one end of the mounting plate 3; the sleeve plate 14 is provided with a second bolt 15, one end of which is in contact with the outer wall of the mounting rod 1; by adjusting the tightening degree of the second bolt 15, the position of the sleeve plate 14 on the mounting rod 1 can be controlled, thereby achieving precise adjustment of the position and angle of the mounting plate 3; the introduction of the sleeve plate 14 enables the mounting plate 3 to be fixed on the mounting rod 1 more stably. Through the close fit between the sleeve plate 14 and the mounting rod 1, and the fixing effect of the second bolt 15, it can be ensured that the mounting plate 3 is not easy to shake or deflect when subjected to external force, thereby ensuring the stability of the entire monitoring device; by adjusting the tightening degree of the second bolt 15, the precise adjustment of the position and angle of the mounting plate 3 can be easily achieved. This design allows the user to flexibly adjust the position and angle of the corrosion detector 2 and the corrosion probe 8 according to specific usage requirements, so as to better monitor the corrosion situation in the ventilation shaft; the design of the sleeve plate 14 and the second bolt 15 makes the installation process of the mounting plate 3 simpler and more convenient. The user only needs to put the sleeve plate 14 on the mounting rod 1, and then fix the mounting plate 3 in a suitable position by adjusting the tightening degree of the second bolt 15. This design reduces the difficulty of installation and improves work efficiency; due to the design of the sleeve plate 14 and the second bolt 15, the position and angle of the mounting plate 3 are adjustable.

[0031] In a further preferred embodiment of the utility model, a protective shell 16 for covering the electric winch 4 is fixedly installed on the top of the mounting plate 3, and a sunshade and rainproof shielding plate 17 is fixedly installed on the top of the protective shell 16.

[0032] In this embodiment, by introducing the design of the protective shell 16 and the shielding plate 17, the electric winch 4 is effectively protected, and the convenience and durability of the entire monitoring device are also improved; the top of the mounting plate 3 is fixedly installed with a protective shell 16, which is mainly used to cover the electric winch 4. The design of the protective shell 16 can ensure that the electric winch 4 is protected from the influence of the external environment, such as dust, moisture, etc. during operation, thereby extending its service life; the top of the protective shell 16 is also fixedly installed with a sunshade and rainproof shielding plate 17. The shielding plate 17 can effectively prevent direct sunlight and rain erosion, further protect the electric winch 4, and also provide a more comfortable working environment for the operator; the combined design of the protective shell 16 and the shielding plate 17 provides all-round protection for the electric winch 4. Whether it is dust, moisture or direct sunlight, it cannot cause damage to the electric winch 4, thereby ensuring its normal operation and long-term stable operation; because the electric winch 4 is effectively protected, its service life is significantly extended. This reduces the cost of maintenance and replacement, and improves the economic benefits of the entire monitoring device; the shielding plate 17 not only has the function of shading and rainproofing, but also can provide a space for operators to shade and shelter from the sun. This allows operators to work normally under adverse weather conditions, and improves the convenience of use; the protective shell 16 and the shielding plate 17 are usually made of materials with good weather resistance, such as stainless steel or aluminum alloy. These materials have excellent corrosion resistance and aging resistance, and can ensure that the entire monitoring device can operate stably for a long time in various environments.

[0033] In a further preferred embodiment of the utility model, an inspection port is provided on one side of the protective shell 16, an openable and closable shielding door is provided in the inspection port, a hinge and a handle are provided on the shielding door, and the hinge is fixedly connected to the protective shell 16.

[0034] In this embodiment, the design of the protective shell 16 is optimized, and the inspection and maintenance of the electric winch 4 is made more convenient and efficient by adding an inspection port and an openable and closable shielding door; an inspection port is set on one side of the protective shell 16; so that maintenance personnel can easily inspect, maintain or replace parts of the electric winch 4; an openable and closable shielding door is set in the inspection port. The shielding door is fixedly connected to the protective shell 16 by a hinge, which ensures its stability and durability. Maintenance personnel can enter the inspection port by opening the shielding door and operate the electric winch 4; hinges and handles are set on the shielding door. The hinge ensures that the shielding door can be opened and closed smoothly, and the handle provides a convenient grip point, so that maintenance personnel can easily open or close the shielding door; by setting the inspection port and the openable and closable shielding door, maintenance personnel can easily inspect and maintain the electric winch 4. This greatly improves work efficiency and reduces downtime caused by equipment failure; regular inspection and maintenance can ensure the normal operation and long-term stability of the electric winch 4. Through this design, users can more conveniently perform daily maintenance and care of the equipment, thereby improving the reliability and service life of the equipment; when no inspection is required, the shielding door can be closed to prevent foreign substances such as dust and moisture from entering the protective shell 16 and causing damage to the electric winch 4. This further enhances the durability and stability of the equipment.

[0035] In a further preferred embodiment of the utility model, a rope hole for passing the twisted rope 5 is provided on the mounting plate 3, and an assembly hole for mounting the corrosion probe 8 is provided on the mounting plate 7.

[0036] In this embodiment, the design of the mounting plate 3 and the assembly plate 7 is optimized, which is specifically reflected in the introduction of the rope hole and the assembly hole; a rope hole for passing the rope 5 is opened on the mounting plate 3; this rope hole provides a clear channel for the rope 5, so that the rope 5 can smoothly pass through the mounting plate 3 and connect with the electric winch 4. This design ensures the correct guidance of the rope 5 and avoids the entanglement or jamming that may occur during its use; an assembly hole for installing the corrosion probe 8 is opened on the assembly plate 7. The shape and size of the assembly hole match the bottom of the corrosion probe 8, so that the corrosion probe 8 can be stably fixed on the assembly plate 7. This design ensures the stability and accuracy of the corrosion probe 8, thereby improving the reliability of corrosion monitoring; by opening the rope hole on the mounting plate 3, a clear channel is provided for the rope 5, making the use of the rope 5 smoother. This helps to reduce the risk of wear and breakage of the rope 5 and improve the efficiency and safety of the use of the rope 5; the assembly hole on the assembly plate 7 ensures the stable installation of the corrosion probe 8. This design avoids the possible shaking or deviation of the corrosion probe 8 during use, thereby improving the accuracy and reliability of corrosion monitoring.

[0037] To sum up, the underground corrosion monitoring device provided by the technical solution makes the inspection and replacement process of the corrosion probe 8 faster and more efficient through the rapid lifting function of the electric winch 4 and the winch rope 5; at the same time, since there is no need to build a safe passage and platform, the additional workload and time cost are reduced. Through remote control and automated operation, personnel do not need to enter the ventilation shaft, thereby avoiding the risk of direct contact with dangerous factors such as toxic gases, hypoxia, and high temperature, and solving the problem of inconvenience in inspection and replacement caused by the installation of corrosion probes in ventilation shafts in the prior art.

[0038] Compared with the related art, the design of the mounting rod 1 and the mounting plate 3 ensures the stable support of the entire monitoring device. The configuration of the electric winch 4 and the winch rope 5 realizes the safe lifting and lowering of the corrosion probe 8, reduces the need for personnel to enter the ventilation shaft, and improves the safety of operation; the combination of the corrosion detector 2 and the corrosion probe 8 realizes the real-time monitoring and data analysis of the corrosion situation in the ventilation shaft; the introduction of the mounting plate 3 and the limit mechanism enables the monitoring device to adjust the installation position and angle according to specific needs, improving the adaptability and flexibility of the device; the design of the protective shell 16 and the shielding plate 17 protects the electric winch 4 from the influence of the external environment.

[0039] It is worth noting that the circuits, electronic components and modules involved in the present utility model are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present utility model does not involve improvements to software and methods.

[0040] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0041] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A downhole corrosion monitoring device, characterized in that: include: A mounting rod, wherein a corrosion detector is disposed on the mounting rod; an adjustable mounting plate, the mounting plate being disposed on the mounting rod; An electric winch for regulating lifting, the electric winch is fixedly mounted on the mounting plate, and a winch rope is provided on the electric winch; A hanger, the hanger being fixedly mounted on the bottom end of the twisted rope; An assembly plate, the assembly plate is fixedly mounted on the hanger, a corrosion probe for monitoring underground corrosion is arranged on the assembly plate, and the corrosion probe is adapted to the corrosion detector; A limiting mechanism for limiting the position of the assembly plate, wherein the limiting mechanism is arranged on the assembly plate.

2. The downhole corrosion monitoring device according to claim 1, characterized in that: The limiting mechanism comprises: A slide groove is provided on the assembly plate; A slide plate slidably mounted in the slide groove; A mounting frame fixed to one end of the slide; The roller mounted on the mounting frame is rotated.

3. The downhole corrosion monitoring device according to claim 2, characterized in that: A limiting groove is provided on the slide plate, and a first bolt for limiting is mounted on the assembly plate, wherein the bottom end of the first bolt extends into the limiting groove.

4. The downhole corrosion monitoring device according to claim 1, characterized in that: A sleeve plate is sleeved on the mounting rod, one end of the sleeve plate is fixedly connected to one end of the mounting plate, a second bolt for limiting position is arranged on the sleeve plate, and one end of the second bolt contacts the outer wall of the mounting rod.

5. The downhole corrosion monitoring device according to claim 1, characterized in that: A protective shell for covering the electric winch is fixedly mounted on the top of the mounting plate, and a sunshade and rainproof shielding plate is fixedly mounted on the top of the protective shell.

6. The downhole corrosion monitoring device according to claim 5, characterized in that: An inspection port is provided on one side of the protective shell, an openable and closable shielding door is provided in the inspection port, a hinge and a handle are provided on the shielding door, and the hinge is fixedly connected to the protective shell.

7. The downhole corrosion monitoring device according to claim 1, characterized in that: The mounting plate is provided with a rope hole through which the twisted rope can pass, and the assembly plate is provided with an assembly hole for mounting the corrosion probe.

Images