Underground circulating switch type automatic water distributor

Abstract

The utility model provides an underground circulating switch type automatic water distributor which comprises an outer protective pipe on the outer side and a central pipe on the inner side, a lower connector and an upper connector are arranged at the two ends of the outer protective pipe respectively, an internal and external pressure detection and control circuit is arranged between the outer protective pipe and the central pipe, and an integrated water nozzle module is arranged in the central pipe. The integrated water nozzle module is connected with the internal and external pressure detection and control circuit, a power supply part is further arranged in the center pipe and connected with the integrated water nozzle module, and the lower connector is provided with an anti-reverse-spitting water outlet. According to the underground circulating switch type automatic water distributor, the interlayer automatic alternate injection mode is adopted, the layered water injection rate is controlled on the ground, the water injection rate of each layer can be accurately adjusted, operation is convenient, throwing-fishing-free underground testing is achieved, and cost is lower.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield water injection devices, specifically relating to a downhole circulating switch type automatic water distributor. Background Technology

[0002] In recent years, stratified injection technology has been widely used in major oilfields. However, due to structural limitations, this technology requires instruments with a drop arm for downhole retrieval and adjustment operations when conducting stratified flow rate testing and adjustment, regardless of whether wire rope or cable testing is used. Precise mechanical guidance and positioning docking structures are also necessary. In highly deviated wells, deep wells, multi-layer injection wells, and produced water reinjection wells, problems such as low testing and adjustment success rates and low operational efficiency exist, failing to meet the requirements of refined water injection.

[0003] Conventional injection processes are limited by the flow meter's starting displacement, and for fine-tuning injection in small-volume wells, the injection volume cannot be measured and adjusted, resulting in large errors. Furthermore, when injection stops or pressure fluctuates, fluid backflow occurs when formation pressure exceeds tubing pressure, allowing dirt, sludge, and gravel to enter the tubing, clogging it and even deteriorating the downhole water quality. Utility Model Content

[0004] The purpose of this invention is to provide a downhole circulating switch type automatic water distributor, which solves the problem that the water injection volume cannot be measured and adjusted, and the error is large, in the existing water injection process for wells with small water injection volumes.

[0005] The technical solution adopted by this utility model is: a downhole circulating switch type automatic water distributor, including an outer protective pipe and an inner central pipe. The outer protective pipe is provided with a lower connector and an upper connector at both ends. An internal and external pressure detection and control circuit is provided between the outer protective pipe and the central pipe. An integrated water nozzle module is provided inside the central pipe. The integrated water nozzle module is connected to the internal and external pressure detection and control circuit. A power supply part is also provided inside the central pipe. The power supply part is connected to the integrated water nozzle module. An anti-backflow outlet is provided on the lower connector.

[0006] The technical solution adopted in this utility model is also characterized by:

[0007] Furthermore, the internal and external pressure detection and control circuit includes an external pressure sensor, an internal pressure sensor, and a circuit component.

[0008] Furthermore, the integrated water tap module includes a motor power unit and a control unit.

[0009] Furthermore, the faucet structure of the integrated faucet module is an elliptical strip.

[0010] Furthermore, the integrated faucet module includes a motor power component, a faucet control component, a faucet inlet, and a faucet outlet connected sequentially from top to bottom. The motor power component is connected to the power supply section, the faucet control component is connected to the internal and external pressure detection and control circuit, and a faucet scour-resistant piston is provided at the faucet outlet. The faucet control component is connected to the scour-resistant piston.

[0011] Furthermore, the faucet control component controls the opening degree of the integrated faucet module through a faucet erosion-resistant piston.

[0012] Furthermore, the water nozzle control assembly contains two electronic switches (upper and lower) and a trigger switch, namely an electronic off switch, an electronic on switch, and a trigger switch. The trigger switch moves synchronously with the water nozzle's erosion-resistant piston. When the piston moves upward, the trigger switch moves upward synchronously until it touches the electronic off switch. At this time, the electronic off switch cuts off the motor power supply system, and the motor power component stops outputting power. The water nozzle is in the closed state at this time. When the trigger switch moves downward and touches the electronic on switch, the water nozzle's erosion-resistant piston stops moving, and the water nozzle is in the open state.

[0013] Furthermore, the power supply is a battery.

[0014] Furthermore, the anti-backflow outlet is a one-way valve.

[0015] The beneficial effects of this utility model are:

[0016] This utility model's downhole circulating switch-type automatic water distributor realizes the layered water volume adjustment controlled and regulated by a surface flow meter, with automatic alternating injection of water volume in each layer. The tool is lowered into the well once, eliminating the need for testing and adjustment in the later stages of the injection well.

[0017] This utility model's downhole circulating switch-type automatic water distributor adopts an automatic inter-layer injection method, with surface control of the layered water injection volume. It can precisely adjust the water injection volume of each layer and is easy to operate, achieving downhole testing without the need for retrieval, and at a lower cost.

[0018] This utility model of a downhole circulating switch type automatic water distributor is suitable for use in highly deviated wells, deep wells, multi-layer injection wells, and produced water reinjection wells, enabling refined layered water injection operations with small injection volumes.

[0019] The integrated water tap module of this invention has the following advantages: the sealing surface of the water tap is parallel to the direction of the water tap, so that the water flow has virtually no impact on the sealing surface. Simultaneously, the outlet uses an anti-erosion material structure, ensuring the water tap's sealing performance over a long period. The water tap uses an annular flow path, eliminating dead zones that could lead to impurity accumulation and affect the tap. Furthermore, because the water tap is constantly being flushed by the water flow, impurities are less likely to accumulate. This also extends the lifespan of the instrument.

[0020] This invention relates to an automatic water distributor with a circulating switch, which improves upon conventional automatic water distributors by modifying the nozzle structure. In this distributor, only one nozzle layer is fully open for water injection at any given time, while the other nozzle layers remain closed. This function is achieved by setting a rotation injection cycle. The distributor operates alternately according to the cycle and the number of nozzle layers. If the circulating switch cycle of the water distributor needs to be changed after it is installed in the well, pressure must be applied from the surface to the well (pressure wave communication) to modify the switch cycle.

[0021] This utility model discloses a downhole circulating switch-type automatic water distributor suitable for low-flow water injection requirements. The distributor also features an anti-backflow function. This anti-backflow structure ensures that when the formation pressure exceeds the water pressure in the tubing, the anti-backflow component's metal ball resets, preventing formation water or oil from entering the tubing. During injection stoppage or pressure fluctuations, it effectively prevents dirt, gravel, and other contaminants from clogging the water distributor. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the downhole circulating switch type automatic water distributor of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the integrated water tap module of this utility model;

[0024] Figure 3 This is a schematic diagram of the inlet and outlet of the integrated water tap module of this utility model;

[0025] Figure 4 This is a structural schematic diagram of the water tap control component of this utility model.

[0026] In the diagram: 1. Lower connector, 2. Outer protective tube, 3. Internal and external pressure detection and control circuit, 4. Integrated faucet module, 5. Power supply section, 6. Upper connector, 7. Anti-backflow outlet, 8. Central tube, 4-1. Motor power assembly, 4-2. Faucet control assembly, 4-21. Electronic shut-off switch, 4-22. Electronic open switch, 4-23. Trigger switch, 4-3. Faucet inlet, 4-4. Faucet outlet, 4-5. Faucet erosion-resistant piston. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] This utility model discloses a downhole circulating switch type automatic water distributor, such as Figure 1As shown, the instrument structure is as follows: both ends are a lower connector 1 and an upper connector 6, the outer side is an outer protective tube 2, the inner side is a central tube 8, each short section is inside the annular sealed cavity, an internal and external pressure detection and control circuit 3 is set between the outer protective tube 2 and the central tube 8, an integrated water nozzle module 4 is set inside the central tube 8, the integrated water nozzle module 4 is connected to the internal and external pressure detection and control circuit 3, a power supply part 5 is also set inside the central tube 8, the power supply part 5 is connected to the integrated water nozzle module 4, and an anti-backflow outlet 7 is set on the lower connector 1.

[0029] The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit section. It measures the internal and external pressure of the oil pipe, processes and stores the data, and controls the water nozzle. The circuit section drives the motor power component and the water nozzle control component in the integrated water nozzle module to increase and decrease the liquid flow area through the water nozzle inlet and outlet, thereby controlling the opening and closing of the instrument's water injection.

[0030] The integrated water tap module 4 includes a motor power unit and a control unit, which performs on / off operations on the liquid flowing out of the instrument.

[0031] like Figure 2 , Figure 3 As shown, the integrated faucet module 4 includes a motor power component 4-1, a faucet control component 4-2, a faucet inlet 4-3, and a faucet outlet 4-4 connected sequentially from top to bottom. The motor power component 4-1 is connected to the power supply part 5, the faucet control component 4-2 is connected to the internal and external pressure detection and control circuit 3, and a faucet erosion-resistant piston 4-5 is provided at the faucet outlet 4-4. The faucet control component 4-2 is connected to the faucet erosion-resistant piston 4-5.

[0032] like Figure 4 As shown, the faucet control assembly 4-2 contains two electronic switches (upper and lower) and a trigger switch. These are an electronic off switch 4-21, an electronic on switch 4-22, and a trigger switch 4-3. The trigger switch 4-3 moves synchronously with the faucet's erosion-resistant piston 4-5. When the piston moves upward, the trigger switch 4-3 moves upward synchronously until it touches the electronic off switch 4-21. At this point, the electronic off switch 4-21 cuts off the motor power supply, and the motor power assembly 4-1 stops outputting power, thus closing the faucet. When the trigger switch 4-3 moves downward and touches the electronic on switch 4-22, the faucet's erosion-resistant piston 4-5 stops moving, and the faucet opens. All of these processes are controlled by a control circuit.

[0033] The water nozzle control component 4-2 completes functions such as receiving and recognizing the communication codes sent from the ground and performing corresponding operations, calculating and timing the switching cycle time, opening and closing the water nozzle, and collecting and storing parameters such as pipe pressure, formation pressure, and temperature.

[0034] The faucet control assembly 4-2 controls the opening degree of the integrated faucet module 4 through the faucet erosion resistant piston 4-5.

[0035] The power supply section 5 is a battery, which mainly provides power to the water tap module 4 to ensure its operation, and also provides power for circuit control.

[0036] The anti-backflow outlet 7 is located on the lower connector 1 and functions as a one-way valve, meaning that internal liquid can flow out while external liquid cannot flow back.

[0037] When the device of this utility model is working normally, the instrument and the oil pipe are placed together in the water injection layer, and the instrument works under the internal program commands.

[0038] When commands such as the instrument's injection cycle need to be changed, high and low pressure pulse signals are generated by switching valves on the ground equipment. The equipment then analyzes the pulse signals and finally interprets them into corresponding commands, thereby changing the water injection cycle.

[0039] The technical solution adopted in this utility model is also characterized by:

[0040] This utility model's circulating switch-type automatic water distributor ensures that only one layer of water taps is fully open for water injection during a certain period, while the other layers are closed. This function is achieved by setting a rotation cycle, and the water distributor alternates between layers according to the rotation cycle and its corresponding number of layers.

[0041] To change the injection cycle, pressure wave communication is used. The pressure wave is generated by switching the surface water injection valve to form a sequence of high and low pressure changes, which represents the injection cycle. The internal and external pressure detection and control circuit (3) of the downhole water distributor detects the pressure sequence through the internal pressure sensor and analyzes the injection cycle.

[0042] This utility model's circulating switch-type automatic water distributor comprises two parts: a mechanical structure and an electrical control system. The mechanical structure serves as the hardware carrier for realizing the functions, while the electrical control system is the core of the function realization, including the internal and external pressure detection and control circuit 3 and the water tap control component 4-2. All algorithm execution and calculations are implemented by the electrical control system, and the final execution is achieved by the electrical control system issuing instructions to control the mechanical components to complete the corresponding operations.

[0043] The main control module of the circulating switch water distributor of this utility model mainly completes the functions of receiving and recognizing the communication code sent from the ground and performing corresponding operations through the integrated water faucet module 4, calculating and timing the switching cycle time, opening and closing the water faucet, and collecting and storing parameters such as pipe pressure, formation pressure, and temperature.

[0044] Before the water distributor of this utility model is lowered into the well, five different cycle switching times can be set: one is the default cycle switching time, and the other four need to be changed by marking different codes on the ground. After the water distributor is set, press the working cycle set before the well to open one water distributor nozzle and start water injection, while the water nozzles of the other water distributors are in the closed state.

[0045] After the circulating switch type water distributor of this utility model is lowered into the well, the circulating switch time can be changed by applying pressure waves on the ground. After the water distributor in the well successfully receives the signal, the water distributors of each layer in the well will immediately start to execute the new circulating switch time. The water nozzles of the layer in the well that were open before the coding will continue to be open, and the water nozzles of the layer in the well that were closed will continue to be closed. Both the ground and the well will execute according to the new circulating switch time cycle.

[0046] Compared with the prior art, the improvement of this utility model lies in the change of the "integrated water tap structure and control method" in the device, and the improvement idea is explained from the following perspectives:

[0047] Currently, conventional or automatic water distributors regulate water volume by using specialized instruments or automatically adjusting the opening of the nozzles, and measuring the water injection volume of each layer using downhole flow meters. However, due to the limitations of current technology and the flow meter's starting displacement, measurement and adjustment errors are large, or even impossible, in low-volume water injection environments. To address the technical shortcomings of conventional or automatic water distributors under low-volume water injection conditions, this invention changes the downhole regulation of layered water volume to a surface control approach. It utilizes a downhole circulating switch-type automatic water distributor to control the periodic automatic opening and closing of each layer, precisely controlling the water injection volume for each layer. To solve this problem, this invention modifies the nozzle structure adjustment and control method, changing the nozzle structure to an elliptical elongated shape, increasing the flow area and eliminating interference from inter-layer pressure differences. Instead, a single command fully opens the nozzles, initiating water injection, while the nozzles of the other layer distributors remain closed. The water volume is controlled by surface flow meters, and the data read from the surface flow meters represents the actual water injection volume for that layer. The following is a detailed description of this invention with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] See also Figure 1 The downhole circulating switch type automatic water distributor has the following structure: the two ends of the instrument are the lower connector 1 and the upper connector 6, the outer side is the outer protective tube 2, the inner side is the central tube 8, and each short section is inside the annular sealing cavity.

[0050] The internal and external pressure detection and control circuit 3, the integrated water nozzle module 4, and the power supply section 5 are all installed and fixed on the lower connector 1. The upper connector 6 and the lower connector 1 simultaneously fix the internal flow tube of the instrument, and finally the upper and lower connectors are connected and fixed through the outer protective tube 2.

[0051] The water inlet of the water distributor is located at the lower connector 1, and the water finally enters the formation after passing through the integrated water nozzle module 4 and the anti-backflow outlet 7.

[0052] In this embodiment, the cyclic on / off automatic water distributor operates with only one layer of water taps fully open for a given period of time, while the other layers remain closed. This function is achieved by setting a rotation cycle, and the water distributor alternates between layers according to the rotation cycle and its corresponding number of layers.

[0053] Example 2

[0054] Based on Embodiment 1, this embodiment provides a downhole circulating switch-type automatic water distributor. This distributor includes, from top to bottom, an upper connector 6, a power supply module 5, an integrated water nozzle module 4, an internal and external pressure detection and control circuit 3, an anti-backflow outlet 7, and a lower connector 1. The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit section. It measures the internal and external pressures of the tubing, processes and stores the data, and controls the water nozzle. The integrated water nozzle module 4 includes a motor power section and a control section, which performs the switching operation on the liquid flowing out of the instrument. The power supply section 5 is a battery, mainly providing power to the water nozzle module 4 to ensure its operation, and also providing power to the circuit control. The anti-backflow outlet 7 is located on the lower connector 1 and functions as a one-way valve, meaning that internal liquid can flow out, but external liquid cannot flow back.

[0055] In this embodiment, when the water distributor is working normally, the instrument and oil pipes are lowered into the water injection layer together, and the instrument operates under internal program commands. When commands such as the injection cycle of the instrument need to be changed, high and low pressure pulse signals are generated through the switching valve of the ground equipment. The equipment then analyzes the pulse signals and finally interprets them into corresponding commands, thereby changing the water injection cycle.

[0056] Example 3

[0057] The downhole circulating switch type automatic water distributor includes an outer protective pipe 2 and an inner central pipe 8. The outer protective pipe 2 is provided with a lower connector 1 and an upper connector 6 at both ends. An internal and external pressure detection and control circuit 3 is provided between the outer protective pipe 2 and the central pipe 8. An integrated water nozzle module 4 is provided inside the central pipe 8. The integrated water nozzle module 4 is connected to the internal and external pressure detection and control circuit 3. A power supply part 5 is also provided inside the central pipe 8. The power supply part 5 is connected to the integrated water nozzle module 4. An anti-backflow outlet 7 is provided on the lower connector 1.

[0058] The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit component.

[0059] The integrated water tap module 4 includes a motor power section and a control section. The water tap structure of the motor power section of the integrated water tap module 4 is an elliptical strip shape.

[0060] Example 4

[0061] The downhole circulating switch type automatic water distributor includes an outer protective pipe 2 and an inner central pipe 8. The outer protective pipe 2 is provided with a lower connector 1 and an upper connector 6 at both ends. An internal and external pressure detection and control circuit 3 is provided between the outer protective pipe 2 and the central pipe 8. An integrated water nozzle module 4 is provided inside the central pipe 8. The integrated water nozzle module 4 is connected to the internal and external pressure detection and control circuit 3. A power supply part 5 is also provided inside the central pipe 8. The power supply part 5 is connected to the integrated water nozzle module 4. An anti-backflow outlet 7 is provided on the lower connector 1.

[0062] The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit component.

[0063] like Figure 2 , Figure 3 As shown, the integrated faucet module 4 includes a motor power section and a control section. The faucet structure of the motor power section of the integrated faucet module 4 is an elliptical strip shape, including a motor power component 4-1, a faucet control component 4-2, a faucet inlet 4-3, and a faucet outlet 4-4 connected sequentially from top to bottom. The motor power component 4-1 is connected to the power supply section 5, and the faucet control component 4-2 is connected to the internal and external pressure detection and control circuit 3. A faucet erosion-resistant piston 4-5 is provided at the faucet outlet 4-4. The faucet control component 4-2 is connected to the faucet erosion-resistant piston 4-5, and the faucet control component 4-2 controls the opening degree of the integrated faucet module 4 through the faucet erosion-resistant piston 4-5.

[0064] The integrated water faucet module 4 control section completes functions such as receiving and recognizing the communication codes sent from the ground and performing corresponding operations, calculating and timing the switching cycle time, opening and closing the water faucet, and collecting and storing parameters such as pipe pressure, formation pressure, and temperature.

[0065] Example 5

[0066] The downhole circulating switch type automatic water distributor includes an outer protective pipe 2 and an inner central pipe 8. The outer protective pipe 2 is provided with a lower connector 1 and an upper connector 6 at both ends. An internal and external pressure detection and control circuit 3 is provided between the outer protective pipe 2 and the central pipe 8. An integrated water nozzle module 4 is provided inside the central pipe 8. The integrated water nozzle module 4 is connected to the internal and external pressure detection and control circuit 3. A power supply part 5 is also provided inside the central pipe 8. The power supply part 5 is connected to the integrated water nozzle module 4. An anti-backflow outlet 7 is provided on the lower connector 1.

[0067] The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit component.

[0068] The integrated water tap module 4 includes a motor power unit and a control unit. The water tap structure of the motor power unit of the integrated water tap module 4 is an elliptical strip. The control unit of the integrated water tap module 4 completes functions such as receiving and recognizing the communication codes sent from the ground and performing corresponding operations, calculating and timing the switching cycle time, opening and closing the water tap, and collecting and storing parameters such as pipe pressure, formation pressure, and temperature. The power supply unit 5 is a battery.

[0069] Example 6

[0070] The downhole circulating switch type automatic water distributor includes an outer protective pipe 2 and an inner central pipe 8. The outer protective pipe 2 is provided with a lower connector 1 and an upper connector 6 at both ends. An internal and external pressure detection and control circuit 3 is provided between the outer protective pipe 2 and the central pipe 8. An integrated water nozzle module 4 is provided inside the central pipe 8. The integrated water nozzle module 4 is connected to the internal and external pressure detection and control circuit 3. A power supply part 5 is also provided inside the central pipe 8. The power supply part 5 is connected to the integrated water nozzle module 4. An anti-backflow outlet 7 is provided on the lower connector 1.

[0071] The internal and external pressure detection and control circuit 3 includes an external pressure sensor, an internal pressure sensor, and a circuit component.

[0072] The integrated water nozzle module 4 includes a motor power section and a control section. The water nozzle structure of the motor power section of the integrated water nozzle module 4 is an elliptical strip shape. The control section of the integrated water nozzle module 4 completes the functions of receiving and recognizing the communication code sent from the ground and performing corresponding operations, calculating and timing the switching cycle time, opening and closing the water nozzle, and collecting and storing parameters such as pipe pressure, formation pressure, and temperature.

[0073] The power supply section 5 is a battery, and the anti-backflow outlet 7 is a one-way valve.

[0074] This utility model provides a downhole circulating switch-type automatic water distributor, which solves the problem of large errors and unmeasurable water injection volume in existing injection processes for wells with small water injection volumes. Before running the downhole circulating switch-type automatic water distributor, parameters are first set, including layer position, clock time, nozzle opening and closing time cycle, and nozzle closing operation. Then, it is connected to the injection tubing string. After the tubing string and water distributor are lowered to the predetermined position downhole, water is injected into the tubing to pressurize and seal the packer. After sealing, water injection begins according to the opening and closing times of the nozzles in each layer downhole. Downhole, only one layer of nozzles is fully open at a certain time, while the nozzles in other layers are closed. The water injection volume of the fully open layer is controlled and adjusted by surface equipment. Based on the circulating switch of the water distributors in each layer downhole, the surface needs to control and change different water injection volumes to meet the water injection requirements of the currently fully open layer. After the water distributor is lowered into the well, if it is necessary to change the cycle time of the water distributor's circulation switch, the ground needs to mark the code (wavecode communication) to the well to complete the modification of the switching cycle.

[0075] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. An automatic water distributor with a circulating switch type for wells, characterized in that, It includes an outer protective tube (2) on the outside and a central tube (8) on the inside. The outer protective tube (2) is provided with a lower connector (1) and an upper connector (6) at both ends. An internal and external pressure detection and control circuit (3) is provided between the outer protective tube (2) and the central tube (8). An integrated water faucet module (4) is provided inside the central tube (8). The integrated water faucet module (4) is connected to the internal and external pressure detection and control circuit (3). A power supply part (5) is also provided inside the central tube (8). The power supply part (5) is connected to the integrated water faucet module (4). An anti-backflow outlet (7) is provided on the lower connector (1).

2. The downhole circulating switch type automatic water distributor according to claim 1, characterized in that, The internal and external pressure detection and control circuit (3) includes an external pressure sensor, an internal pressure sensor, and a circuit section.

3. The downhole circulating switch type automatic water distributor according to claim 2, characterized in that, The integrated water tap module (4) includes a motor power section and a control section.

4. The downhole circulating switch type automatic water distributor according to claim 3, characterized in that, The faucet structure of the integrated faucet module (4) is an elliptical strip.

5. The downhole circulating switch type automatic water distributor according to claim 4, characterized in that, The integrated water tap module (4) includes a motor power assembly (4-1), a water tap control assembly (4-2), a water tap inlet (4-3), and a water tap outlet (4-4) connected sequentially from top to bottom. The motor power assembly (4-1) is connected to the power supply part (5), the water tap control assembly (4-2) is connected to the internal and external pressure detection and control circuit (3), and a water tap erosion resistant piston (4-5) is provided at the water tap outlet (4-4). The water tap control assembly (4-2) is connected to the water tap erosion resistant piston (4-5).

6. The downhole circulating switch type automatic water distributor according to claim 5, characterized in that, The faucet control assembly (4-2) controls the opening degree of the integrated faucet module (4) through the faucet erosion resistant piston (4-5).

7. The downhole circulating switch type automatic water distributor according to claim 6, characterized in that, The water nozzle control assembly (4-2) contains two electronic switches (upper and lower) and a trigger switch, namely an electronic shut-off switch (4-21), an electronic open switch (4-22), and a trigger switch (4-23). ​​The trigger switch (4-23) moves synchronously with the water nozzle erosion-resistant piston (4-5). When the piston moves upward, the trigger switch (4-23) moves upward synchronously until the trigger switch (4-23) touches the electronic shut-off switch (4-21). At this time, the electronic shut-off switch (4-21) cuts off the motor power supply system, and the motor power assembly (4-1) stops power output. At this time, the water nozzle is in the closed state. When the trigger switch (4-23) moves downward and touches the electronic open switch (4-22), the water nozzle erosion-resistant piston (4-5) stops moving, and the water nozzle is in the open state.

8. The downhole circulating switch type automatic water distributor according to claim 3, characterized in that, The power supply part (5) is a battery.

9. The downhole circulating switch type automatic water distributor according to claim 1, characterized in that, The anti-backflow outlet (7) is a one-way valve.

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