A well-washing device for preventing leakage and corrosion

Abstract

The invention relates to the technical field of oilfield oil production and well washing equipment, and specifically to a leakage and corrosion prevention well washing device. The device comprises an outer cylinder, a one-way flow suppression core and a heating device. The outer cylinder is composed of an upper cylinder and a lower cylinder, which is connected to the well pipeline and extends into the oil layer. The one-way flow suppression core is installed in the outer cylinder, including a central matrix and a plurality of Tesla flow slot modules, forming a Tesla flow channel that is upwardly conductive and downwardly inhibited, ensuring smooth oil discharge while inhibiting the backflow of the well washing fluid into the oil layer. Soluble granular materials are added to the cleaning fluid to form a temporary seal in the Tesla flow channel to prevent the well washing fluid from penetrating into the oil layer; after the well is washed, the granular materials are accelerated to dissolve, and the flow channel is quickly restored to be unobstructed. The lower cylinder adopts active metal as a sacrificial anode, and uses electrochemical principles to protect the internal components from corrosion. The invention has a compact structure, is easy to operate, and is easy to maintain, effectively improving the well washing effect of the oil well, and ensuring the high efficiency and stability of oilfield development and production.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield oil production and well washing equipment, and in particular to a leakage and corrosion prevention and well washing device. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] During the development and production of oil fields, oil well flushing is a crucial maintenance operation, which aims to remove sediments and impurities inside the oil well to ensure that the oil well can produce efficiently and stably. However, in some cases, especially when the energy of the oil layer is low, the well flushing fluid cannot be returned to the ground normally during the well flushing process. This not only causes a large amount of well flushing fluid to remain in the oil layer, but may also cause oil layer pollution, thereby affecting the production performance of the oil well. Specifically, the water content of the oil produced when the well is opened for production increases significantly, and even high water content production continues during the subsequent long-term production process, which ultimately makes it difficult for oil production to return to the level before well flushing.

[0004] In order to solve the above problems, the method currently commonly used in the industry is to lower a mechanical device composed of a packer and a one-way valve above the oil layer. This method prevents the well-washing fluid from entering the oil layer by means of physical isolation, which can theoretically effectively avoid the above problems. However, in actual applications, it is found that due to being in a harsh working environment for a long time, the one-way valve is prone to aging or damage, and then loses its one-way conduction function. Moreover, impurities in the well-washing fluid may cause blockage of the one-way valve, affecting its normal operation. In addition, once there is a problem with the packer and one-way valve combination device, the process of removing it from the well is complicated and costly, which increases the difficulty and time cost of maintenance.

[0005] Therefore, it is necessary to study a new technical solution to improve the oil well flushing effect and ensure the smooth, efficient and high-quality development and production of oil fields. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a leakage-proof and corrosion-proof well washing device, which can not only ensure that the well washing fluid does not enter the oil layer, but also simplify the operation process, reduce the failure rate, and facilitate later maintenance and recovery.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A leakage prevention and corrosion prevention well washing device comprises an outer cylinder, the outer cylinder comprises an upper cylinder part and a lower cylinder part, and a one-way flow suppression core is concentrically installed in the outer cylinder and closely attached to the side wall;

[0009] The one-way flow suppression core includes a central base installed in the lower cylinder, and a plurality of Tesla flow channel modules closely attached to the inner side wall of the lower cylinder are installed on the side wall of the central base, and the Tesla flow channel modules and the inner side wall of the lower cylinder together constitute a plurality of Tesla flow channels;

[0010] The Tesla flow channel is conducted upwards for smooth oil discharge and is used to suppress flow downwards for generating resistance during backwashing of the well so that the well washing fluid can be returned to the ground.

[0011] The cleaning fluid contains granular materials that are soluble in the cleaning fluid, which are used to accumulate in the Tesla flow channel until the oil layer is completely sealed to ensure smooth well cleaning;

[0012] A heating device is installed in the central matrix, and the heating device cleans the Tesla flow channel by heating, including but not limited to the deposits of the granular material and oil wax, so as to restore or maintain the smooth flow of the Tesla flow channel;

[0013] The lower cylinder is made of active metal, and uses the principle of electrochemical corrosion to prevent corrosion of the one-way flow suppression core underground.

[0014] Preferably, a mounting plate guide module is installed at the upper end of the central base for limiting the installation of the Tesla flow channel module and the central base and for guiding the liquid in the Tesla flow channel.

[0015] Preferably, the mounting plate guide module includes a mounting plate body, a center hole for installation is opened in the center of the mounting plate body, a plurality of upper flow holes corresponding to the Tesla flow channel are opened around the center hole, and an upper guide plate is arranged on the outer side of each upper flow hole.

[0016] Preferably, the side wall of the central base is provided with a plurality of mounting grooves, and a partition is provided between adjacent mounting grooves, and a corresponding Tesla flow channel module is installed in each mounting groove;

[0017] The installation grooves are each provided with a corresponding first limiting groove, and the Tesla flow channel module is provided with a first installation block adapted to the first limiting groove.

[0018] Preferably, the mounting plate body is provided with a connection hole for connecting the Tesla flow cell module, and a flange hole for matching flange connection is provided at the periphery of the connection hole, and the mounting plate body is fixed to the upper cylinder and the lower cylinder by flange connection;

[0019] A positioning block is arranged at the lower side of the installation plate body, and a positioning hole adapted to the positioning block is opened on the end surface of the central base.

[0020] Preferably, the heating device is a central heating rod for heating all Tesla flow channel modules. A central mounting hole for installing the central heating rod is opened at the center of the central base. An end cover is provided at the upper end of the central mounting hole. A central guide tip for guiding flow in cooperation with the upper guide plate is provided on the upper side of the end cover.

[0021] Preferably, the side wall of the central base is provided with a plurality of base barrels for correspondingly installing the Tesla flow cell modules, and each of the Tesla flow cell modules is provided with a limiting hole adapted to the base barrel;

[0022] The Tesla flow channel modules are connected and matched in pairs to form a cylindrical surface adapted to the inner side wall of the lower cylinder;

[0023] Both sides of the Tesla flow channel module are provided with a second limiting groove and a second mounting block for connecting and matching.

[0024] Preferably, the heating device comprises a plurality of split heating rods installed in the base tube, each split heating rod being used for heating a corresponding Tesla flow cell module;

[0025] The mounting plate body is connected and fixed to the upper cylinder and the lower cylinder by flanges;

[0026] A clamping column which is plugged and matched with the top of the base tube is arranged on the lower side of the installation plate body. The clamping column is used for positioning and installing the installation plate body and also for limiting the position of the split heating rod.

[0027] Preferably, the lower end of the central base is limitedly installed in the lower cylinder, and a limiting plug block for limiting is provided at the lower end of the central base;

[0028] A lower guide plate is arranged at the lower end of the central base.

[0029] Preferably, a lower base plate is provided at the lower end of the central base, and the lower base plate is provided with a lower flow hole corresponding to the Tesla flow channel.

[0030] The present invention has at least the following beneficial effects:

[0031] The present invention adopts modular design, specifically including modular design of Tesla flow channel module, modular design of heating device, modular design of installation plate guide module and modular consideration of anti-corrosion measures. The present invention achieves the goals of compact structure, diverse functions and easy maintenance by cleverly modularizing different functional units. Modular design not only simplifies the manufacturing and assembly process, but also greatly improves the maintainability and scalability of the system, which is of great significance for improving the safety and efficiency of oilfield oil production and well washing operations.

[0032] The present invention adopts the design of a one-way flow suppression core and a Tesla flow channel to ensure that the well washing fluid will not easily flow into the oil layer during backwashing, thereby avoiding oil layer pollution and reducing the risk of increased water content in the oil produced during well production.

[0033] The present invention uses the Tesla flow channel and granular materials to work together to isolate the oil layer, which not only solves the problems existing in the traditional method, such as the failure risk caused by aging and damage of the one-way valve, reduces the possibility of failure, but also provides a more reliable and efficient technical means to protect the oil layer from pollution. This method reduces the risks that may occur during the well washing process, prolongs the service life of the oil well, and simplifies the subsequent maintenance work.

[0034] The heating device in the present invention is not only used to clean various sediments including granular materials, but also can accelerate the dissolution process of granular materials after well washing is completed, and quickly restore the flow channel to be unblocked. The existence of the heating device improves the flexibility and response speed of the entire system.

[0035] The whole device of the present invention is easy to disassemble and can be conveniently taken out from the well when repair or replacement of parts is required, thus reducing the cost and difficulty of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0037] Figure 2 This is a schematic diagram of an overall split structure of the present invention;

[0038] Figure 3 for Figure 2 Schematic diagram of the structure of the central matrix in;

[0039] Figure 4 for Figure 2 The structural diagram of the Tesla flow cell module in FIG.

[0040] Figure 5 for Figure 2 A schematic diagram of the structure of the installation plate guide module;

[0041] Figure 6 It is another schematic diagram of the overall split structure of the present invention;

[0042] Figure 7 for Figure 6 Schematic diagram of the structure of the central matrix in;

[0043] Figure 8 for Figure 6 The structural diagram of the Tesla flow cell module in FIG.

[0044] Fig. 9 for Figure 6 A schematic diagram of the upper structure of the installation plate guide module;

[0045] Fig.10 for Figure 6 Schematic diagram of the lower structure of the installation plate guide module.

[0046] The reference numerals are as follows:

[0047] 100, upper cylinder; 101, confluence chamber; 200, lower cylinder; 300, central base; 301, mounting portion; 302, partition base; 303, mounting groove; 304, first limiting groove; 305, positioning hole; 306, central heating rod; 307, lower base plate; 3071, lower flow hole; 308, lower guide plate; 309, limiting plug; 310, base cylinder; 311, split heating rod; 312, middle Center guide tip; 400, installation disk guide module; 401, installation disk body; 402, center hole; 403, upper flow hole; 404, connecting hole; 405, flange hole; 406, upper guide plate; 407, positioning block; 408, clamping column; 500, Tesla flow channel module; 501, Tesla flow channel; 502, first installation block; 503, limiting hole; 504, second limiting groove; 505, second installation block. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0049] Embodiment 1:

[0050] Figures 1 to 5 A leakage prevention and corrosion prevention well washing device is shown, comprising an outer cylinder, the outer cylinder comprising an upper cylinder portion 100 and a lower cylinder portion 200, the upper cylinder portion 100 is connected to the wellbore pipeline, the lower end of the lower cylinder portion 200 extends into the oil layer, and a one-way flow suppression core is concentrically installed in the outer cylinder and tightly attached to the side wall;

[0051] The structure of the one-way flow suppression core is as follows: it includes a central base 300 installed in the lower cylinder 200, and a plurality of Tesla flow channel modules 500 tightly attached to the inner wall of the lower cylinder 200 are installed on the side wall of the central base 300. The Tesla flow channel modules 500 and the inner wall of the lower cylinder 200 together constitute a plurality of Tesla flow channels 501.

[0052] The Tesla flow channel 501 is conducted upward for smooth oil discharge, and is used to suppress flow downward for generating resistance during backwashing of the well so that the well-washing fluid can be returned to the ground.

[0053] The cleaning liquid is added with granular materials soluble in the cleaning liquid, which are used to accumulate in the Tesla flow channel 501 until the oil layer is completely sealed to ensure smooth well cleaning.

[0054] A heating device is installed in the central matrix 300, and the heating device cleans the deposits including but not limited to the granular material and oil wax in the Tesla flow channel 501 by heating, thereby restoring or maintaining the smooth flow of the Tesla flow channel 501; granular materials soluble in the cleaning fluid are added to the cleaning fluid, and these granular materials can accumulate in the Tesla flow channel 501 until the entrance to the oil layer is completely sealed. In this way, a physical barrier can be formed during the well washing operation to prevent the well washing fluid from further penetrating into the oil layer. At the same time, since the granular material is soluble, after the well washing is completed, the granular material can be dissolved by injecting a specific solvent or using a heating device, thereby restoring the smooth flow of the Tesla flow channel 501. This method not only ensures the safety and effectiveness of the well washing process, but also does not affect the normal production of subsequent oil wells.

[0055] The granular material includes but is not limited to microcrystalline wax and synthetic wax, and the synthetic wax includes but is not limited to polyethylene wax and polypropylene wax. Of course, granular materials of other materials may also be used as long as the conditions are met.

[0056] The upper end of the central base 300 is provided with a mounting plate guide module 400 for limiting the installation of the Tesla flow channel module 500 and the central base 300 and guiding the liquid in the Tesla flow channel 501 .

[0057] The specific structure of the mounting plate guide module 400 is as follows: it includes a mounting plate body 401, a center hole 402 for installation is provided in the center of the mounting plate body 401, and the center base 300 is provided with a mounting portion 301 adapted to the center hole 402; a plurality of upper flow holes 403 corresponding to the Tesla flow channel 501 are provided on the periphery of the center hole 402, and an upper guide plate 406 is provided on the outer side of each upper flow hole 403.

[0058] The lower end of the central base 300 is limitedly installed in the lower cylinder 200, and a limiting plug 309 for limiting is provided at the lower end of the central base 300; a lower guide plate 308 is provided at the lower end of the central base 300. Of course, the limiting plug 309 and the lower guide plate 308 can be arranged separately or in one piece. In the present embodiment, they are arranged in one piece.

[0059] The lower cylinder 200 is made of active metal, and uses the principle of electrochemical corrosion to prevent corrosion of the one-way flow suppression core underground.

[0060] The specific principle of corrosion prevention is as follows: by selecting appropriate active metals for the lower cylinder 200 as a sacrificial anode, the electrochemical corrosion principle is used to protect the one-way flow suppression core from corrosion. Specifically, when the lower cylinder 200 uses active metals (such as zinc, magnesium or aluminum) as sacrificial anodes, these metals will preferentially undergo oxidation reactions and release electrons, while the protected one-way flow suppression core becomes a cathode to avoid direct contact with corrosive media, thereby reducing the risk of corrosion, effectively extending the service life of the device and reducing maintenance costs. Since the lower cylinder 200 itself is an independent module, if corrosion or other problems occur, it can also be replaced separately without having to replace the entire well washing device.

[0061] In order to make the installation of the Tesla flow trough module 500 more stable, a lower base plate 307 is provided at the lower end of the central base 300. In order to cooperate with the Tesla flow channel 501 to discharge liquid, the lower base plate 307 is provided with a lower flow hole 3071 corresponding to the Tesla flow channel 501.

[0062] In this embodiment, the Tesla flow channel module 500 is installed as follows: a plurality of installation grooves 303 are opened on the side wall of the central base 300, and a partition 302 is provided between adjacent installation grooves 303 to provide a reference for the installation surface of the side wall, and a corresponding Tesla flow channel module 500 is installed in each installation groove 303;

[0063] The installation grooves 303 are provided with corresponding first limiting grooves 304, and the Tesla flow channel module 500 is provided with a first installation block 502 adapted to the first limiting grooves 304. Although a part of the flow space is sacrificed in such installation, the setting of the partition base 302 makes the installation stability of the Tesla flow channel module 500 better, and at the same time, the installation center (centrality) of the whole formed by the central base 300 and the Tesla flow channel module 500 is more stable, so that the functionality of the Tesla flow channel 501 is better, that is, it is conducive to the smooth oil discharge of the Tesla flow channel 501 upwards, and the resistance is generated when the well washing fluid is suppressed downwards.

[0064] In this embodiment, the mounting plate body 401 is provided with a connection hole 404 for connecting the Tesla flow cell module 500, and a flange hole 405 for matching flange connection is provided on the periphery of the connection hole 404. The mounting plate body 401 is fixed to the upper cylinder 100 and the lower cylinder 200 by flange connection.

[0065] A positioning block 407 is disposed at the lower side of the mounting plate body 401 , and a positioning hole 305 adapted to the positioning block 407 is opened on the end surface of the central base 300 .

[0066] In this embodiment, the installation process of the well washing device is as follows: first, the Tesla flow channel module 500 is installed in the corresponding installation groove 303, and assembled into a whole with the central base 300, and the lower base plate 307 can provide a limit and reference for the corresponding Tesla flow channel module 500; then, the central base 300 equipped with the Tesla flow channel module 500 is inserted into the lower cylinder 200; then, the installation disk guide module 400 is covered, and during operation, pay attention to the plug-in cooperation between the positioning block 407 and the positioning hole 305 to complete the positioning, and the installation disk guide module 400 is assembled into a whole with the central base 300 through the connecting hole 404 and the corresponding threaded fixing part. At this time, the installation disk guide module 400 generates a limit for the Tesla flow channel module 500; finally, the upper cylinder 100, the installation disk guide module 400 and the lower cylinder 200 are connected by flanges to complete the overall fixed installation.

[0067] In this embodiment, the heating device is a central heating rod 306, which is used to heat all Tesla flow slot modules 500. The center of the central base 300 is provided with a central mounting hole for mounting the central heating rod 306. The upper end of the central mounting hole is provided with an end cover. The upper side of the end cover is provided with a central guide tip 312 that cooperates with the upper guide plate 406 to guide the flow, which is used to synergistically improve the guiding effect of the oil output. The upper guide plate 406 and the central guide tip 312 are matched in the confluence cavity 101 of the upper cylinder 100, and the confluence cavity 101 is conical. Such a design is simple and easy to implement, but when a specific area needs to be heated, it may not provide the most effective heat distribution.

[0068] Embodiment 2:

[0069] Different from the above embodiment, in this embodiment, Figures 6 to 10 As shown, the Tesla flow channel module 500 is different, specifically as follows: the side wall of the central base 300 is provided with a plurality of base cylinders 310 for correspondingly installing the Tesla flow channel module 500, and each of the Tesla flow channel modules 500 is provided with a limiting hole 503 adapted to the base cylinder 310;

[0070] The Tesla flow channel modules 500 are connected in pairs to form a cylindrical surface adapted to the inner wall of the lower cylinder 200;

[0071] The two sides of the Tesla flow cell module 500 are provided with a second limiting groove 504 and a second mounting block 505 for connecting and matching.

[0072] In addition, the heating device is also different. In this embodiment, the heating device includes a plurality of split heating rods 311 installed in the base tube 310, and each split heating rod 311 is used to heat the corresponding Tesla flow cell module 500; this method can more accurately control the temperature of each module, which is particularly suitable for situations where local heating is required or the temperature difference between different modules is large. In addition, the split heating rod 311 is also easy to replace or repair separately, further improving the reliability of the system.

[0073] The mounting plate body 401 is fixed to the upper cylinder 100 and the lower cylinder 200 by flange connection;

[0074] A clamping column 408 which is plugged into and fits with the top of the base cylinder 310 is disposed on the lower side of the mounting plate body 401 . The clamping column 408 is used for positioning and installing the mounting plate body 401 and also for limiting the position of the split heating rod 311 .

[0075] In summary, the well washing device includes an outer cylinder, a one-way flow suppression core and a heating device. The outer cylinder is composed of an upper cylinder 100 and a lower cylinder 200, which is connected to the wellbore pipeline and extends into the oil layer. The one-way flow suppression core is installed in the outer cylinder, including a central matrix 300 and a plurality of Tesla flow slot modules 500, forming a Tesla flow channel 501 that is upwardly conductive and downwardly inhibited, ensuring smooth oil discharge while inhibiting the backflow of the well washing fluid into the oil layer. Soluble granular materials are added to the cleaning fluid to form a temporary seal in the Tesla flow channel 501 to prevent the well washing fluid from penetrating into the oil layer; after the well is washed, the granular materials are accelerated to dissolve, and the flow channel is quickly restored to be unobstructed. The lower cylinder 200 uses active metal as a sacrificial anode, and uses electrochemical principles to protect the internal components from corrosion. The present invention has a compact structure, simple operation, and easy maintenance, which effectively improves the well washing effect of the oil well and ensures the high efficiency and stability of oil field development and production.

[0076] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0077] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leakage prevention and corrosion prevention well washing device, comprising an outer cylinder, the outer cylinder comprising an upper cylinder part and a lower cylinder part, characterized in that: A one-way flow suppression core is concentrically installed in the outer cylinder and closely attached to the side wall; The one-way flow suppression core includes a central base installed in the lower cylinder, and a plurality of Tesla flow channel modules closely attached to the inner side wall of the lower cylinder are installed on the side wall of the central base, and the Tesla flow channel modules and the inner side wall of the lower cylinder together constitute a plurality of Tesla flow channels; The Tesla flow channel is conducted upwards for smooth oil discharge and is used to suppress flow downwards for generating resistance during backwashing of the well so that the well washing fluid can be returned to the ground. The well-washing fluid contains granular materials that are soluble in the well-washing fluid and are used to accumulate in the Tesla flow channel until the oil layer is completely sealed to ensure smooth well-washing. A heating device is installed in the central matrix, and the heating device cleans the Tesla flow channel by heating, including but not limited to the deposits of the granular material and oil wax, so as to restore or maintain the smooth flow of the Tesla flow channel; The lower cylinder is made of active metal, and uses the principle of electrochemical corrosion to prevent corrosion of the one-way flow suppression core underground.

2. The anti-leakage and anti-corrosion well-washing device according to claim 1, characterized in that: The upper end of the central base is equipped with a mounting plate guide module for limiting the Tesla flow channel module and the central base and guiding the liquid in the Tesla flow channel.

3. The anti-leakage and anti-corrosion well-washing device according to claim 2, characterized in that: The installation disk guide module includes a installation disk body, a center hole for installation is opened in the center of the installation disk body, a plurality of upper flow holes corresponding to the Tesla flow channel are opened outside the center hole, and an upper guide plate is arranged outside each upper flow hole.

4. The anti-leakage and anti-corrosion well-washing device according to claim 3, characterized in that: The side wall of the central base is provided with a plurality of mounting grooves, and a partition is provided between adjacent mounting grooves, and a corresponding Tesla flow channel module is installed in each mounting groove; The installation grooves are each provided with a corresponding first limiting groove, and the Tesla flow channel module is provided with a first installation block adapted to the first limiting groove.

5. The anti-leakage and anti-corrosion well-washing device according to claim 4, characterized in that: The mounting plate body is provided with a connection hole for connecting the Tesla flow cell module, and a flange hole for matching flange connection is provided on the periphery of the connection hole, and the mounting plate body is fixed to the upper cylinder and the lower cylinder by flange connection; A positioning block is arranged at the lower side of the installation plate body, and a positioning hole adapted to the positioning block is opened on the end surface of the central base.

6. The anti-leakage and anti-corrosion well-washing device according to claim 5, characterized in that: The heating device is a central heating rod used to heat all Tesla flow channel modules. A central mounting hole for installing the central heating rod is opened at the center of the central base. An end cover is arranged at the upper end of the central mounting hole. A central guide tip is arranged on the upper side of the end cover to cooperate with the upper guide plate for guiding flow.

7. The anti-leakage and anti-corrosion well-washing device according to claim 3, characterized in that: The side wall of the central base is provided with a plurality of base cylinders for correspondingly installing the Tesla flow channel modules, and each of the Tesla flow channel modules is provided with a limiting hole adapted to the base cylinder; The Tesla flow channel modules are connected and matched in pairs to form a cylindrical surface adapted to the inner side wall of the lower cylinder; Both sides of the Tesla flow channel module are provided with a second limiting groove and a second mounting block for connecting and matching.

8. The anti-leakage and anti-corrosion well-washing device according to claim 7, characterized in that: The heating device comprises a plurality of split heating rods installed in the base cylinder, each split heating rod being used for heating a corresponding Tesla flow cell module; The mounting plate body is connected and fixed to the upper cylinder and the lower cylinder by flanges; A clamping column which is plugged and matched with the top of the base tube is arranged on the lower side of the installation plate body. The clamping column is used for positioning and installing the installation plate body and also for limiting the position of the split heating rod.

9. The anti-leakage and anti-corrosion well-washing device according to claim 4 or 7, characterized in that: The lower end of the central base is limitedly installed in the lower cylinder, and a limiting plug block for limiting is provided at the lower end of the central base; A lower guide plate is arranged at the lower end of the central base.

10. The anti-leakage and anti-corrosion well-washing device according to claim 9, characterized in that: A lower base plate is disposed at the lower end of the central base body, and the lower base plate is provided with a lower flow hole corresponding to the Tesla flow channel.

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