A combined sealed intelligent plunger for drainage and gas collection

Abstract

The present invention belongs to the technical field of petroleum engineering equipment, and particularly relates to a combined sealed water drainage and gas production intelligent plunger, comprising an intelligent plunger body and an expansion sealing structure; the intelligent plunger body comprises a sensor compartment, a motor compartment and a control flow channel compartment, the sensor compartment, the motor compartment and the control flow channel compartment are arranged in sequence from top to bottom, a pressure sensor and an acceleration sensor are arranged in the sensor compartment, the pressure sensor is used to detect the pressure of the liquid column above the intelligent plunger body, the acceleration sensor is used to detect the speed of the intelligent plunger body, and a motor is arranged in the motor compartment. The present invention can control the downward and upward speeds of the combined sealed water drainage and gas production intelligent plunger by arranging a pressure sensor, an acceleration sensor, a motor and a throttle valve, so as to avoid problems such as fluid disturbance and pressure fluctuation caused by excessive speed, which is conducive to improving the efficiency of water drainage and gas production.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum engineering equipment, and in particular relates to a combined sealed water drainage and gas production intelligent plunger. Background Art

[0002] In the production process of natural gas wells, as the mining process proceeds, the bottom hole pressure gradually decreases, and liquid accumulation begins to occur at the bottom of the well. Especially in the middle and late stages of gas well production, the problem of liquid accumulation is particularly prominent, which will cause great harm to gas well production. There are many types of gas well drainage and gas production processes, which are suitable for different production stages of gas wells. Among them, the plunger drainage and gas production process can make full use of the formation energy, extend the gas well self-flowing cycle, and has low one-time investment and low later maintenance costs. It is a widely used process technology. Plunger drainage gas production technology is an effective way to effectively solve the problem of liquid accumulation in low-yield gas wells. Its working principle is to put the plunger into the well, the plunger separates the lifted liquid and gas in the well, and at the same time the plunger effectively prevents gas from rising and liquid from flowing back. Then the gas in the gas well is used to push the plunger in the oil pipe upward, and the liquid accumulated on the top of the plunger is effectively removed from the bottom of the well to achieve the purpose of increasing production.

[0003] However, in the prior art, the plunger's downward speed is too fast, which may disturb the bottom fluid and affect the efficiency of drainage and gas production. Therefore, it is necessary to design a combined sealed drainage and gas production intelligent plunger to solve the above problem. Summary of the invention

[0004] In view of the above problems, the present invention provides a combined sealed drainage and gas production intelligent plunger to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined sealed water drainage and gas collection intelligent plunger, comprising an intelligent plunger body and an expansion sealing structure;

[0006] The intelligent plunger body comprises a sensor compartment, a motor compartment and a control flow channel compartment, wherein the sensor compartment, the motor compartment and the control flow channel compartment are sequentially arranged from top to bottom, a pressure sensor and an acceleration sensor are arranged in the sensor compartment, the pressure sensor is used to detect the pressure of the liquid column above the intelligent plunger body, the acceleration sensor is used to detect the speed of the intelligent plunger body, a motor is arranged in the motor compartment, a guide hole is opened on the side wall of the control flow channel compartment, a throttle valve is arranged in the control flow channel compartment, the motor is connected to the throttle valve in a transmission manner, and the throttle valve is used to block the guide hole;

[0007] The expansion sealing structure includes a coupling, a tile and a rubber sealing sleeve. The coupling is connected to the lower end of the control flow channel chamber. A plurality of tiles are provided, and the plurality of tiles are circumferentially distributed on the circumference of the coupling. The rubber sealing sleeve is sleeved on the circumference of the plurality of tiles. The throttle valve is used to extend into the coupling and to push the plurality of tiles to move outward in the radial direction of the coupling.

[0008] Furthermore, a composite column structure is arranged on the inner side of the tile, a circular hole is opened on the circumference of the coupling, and the composite column structure passes through the circular hole and is located in the coupling.

[0009] Furthermore, a lead screw push rod, a trapezoidal lead screw and the throttle valve are sequentially arranged in the control flow channel chamber from top to bottom, the motor is used to be connected to the lead screw push rod, the lead screw push rod is connected to the trapezoidal lead screw through a screw pair and is used to drive the trapezoidal lead screw to move in a vertical direction, and the trapezoidal lead screw is connected to the throttle valve.

[0010] Furthermore, the expansion sealing structure also includes an expansion water-stop ring, and the expansion water-stop ring is circumferentially sleeved on the throttle valve.

[0011] Furthermore, a diaphragm coupling is also provided in the motor compartment, and two ends of the diaphragm coupling are respectively connected to the motor and the lead screw push rod.

[0012] Furthermore, the combined sealed drainage and gas production intelligent plunger also includes a radio transmission cabin, a battery cabin, a control cabin and a sensor cabin. The radio transmission cabin, the battery cabin, the control cabin, the sensor cabin, the motor cabin and the control flow channel cabin are arranged in sequence from top to bottom and are interconnected, and are connected in sequence by threads.

[0013] Furthermore, a disc coil is provided in the radio transmission cabin;

[0014] A lithium battery is arranged in the battery compartment, a wire inlet is provided in the battery compartment, and the disc-shaped coil passes through the wire inlet and is connected to the lithium battery;

[0015] A control circuit board is arranged in the control cabin.

[0016] Furthermore, the combined sealed drainage and gas production intelligent plunger also includes a turbulent sealing structure, which is connected to the lower end of the control flow channel chamber. The upper and lower ends of the turbulent sealing structure are open, and a central flow channel is opened inside.

[0017] Furthermore, an external plug sealing groove is provided on the outer side wall of the turbulent flow sealing structure, and the groove depth of the external plug sealing groove gradually increases from top to bottom.

[0018] Furthermore, a threaded cylindrical positioning pin is provided on the inner side wall of the turbulent flow sealing structure, and the threaded cylindrical positioning pin is used to prevent the throttle valve from moving downward.

[0019] Technical effects and advantages of the present invention:

[0020] 1. By setting up pressure sensors, acceleration sensors, motors and throttle valves, the downward and upward speeds of the combined sealed drainage and gas production intelligent plunger can be controlled to avoid problems such as fluid disturbance and pressure fluctuation caused by excessive speed, which is beneficial to improving the efficiency of drainage and gas production.

[0021] 2. By designing a radio transmission cabin and using a disc coil for wireless power transmission, the stable operation of the system is ensured, and frequent disassembly of the wellhead equipment and the combined sealed drainage and gas production intelligent plunger is avoided.

[0022] 3. By opening an external plug sealing groove on the outer side wall of the turbulent flow sealing structure, and the depth of the external plug sealing groove gradually increases from top to bottom, it is helpful to solve the problems of gas upward flow and liquid reflux that occur during the lifting of accumulated liquid.

[0023] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 2 is a schematic diagram of the structure of a combined sealed water drainage and gas collection intelligent plunger according to an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of a combined sealed water drainage and gas collection intelligent plunger according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal structure of the motor compartment and the control flow channel compartment of the present invention.

[0028] Figure markings: 1. Radio transmission cabin; 1-1. Upper end cover; 1-2. Disc coil; 2. Battery cabin; 2-1. Lithium battery; 3. Control cabin; 3-1. Control circuit board; 4. Sensor cabin; 4-1. Pressure sensor; 4-2. Pressure inlet; 4-3. Acceleration sensor; 5. Motor cabin; 5-1. Motor; 5-2. Diaphragm coupling; 6. Control flow channel cabin; 6-1. Screw push rod; 6-2. Trapezoidal screw; 6-3. Expansion water stop ring; 6-4. Throttle valve; 6-5. Guide hole; 7. Expansion sealing structure; 7-1. Coupling; 7-2. Tile; 7-3. Rubber sealing sleeve; 8. Turbulence sealing structure; 8-1. Center flow channel; 8-2. Threaded cylindrical locating pin. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 3 As shown, a combined sealed water drainage and gas collection intelligent plunger according to an embodiment of the present invention comprises an intelligent plunger body and an expansion sealing structure 7;

[0031] The intelligent plunger body includes a sensor cabin 4, a motor cabin 5 and a control flow channel cabin 6, wherein the sensor cabin 4, the motor cabin 5 and the control flow channel cabin 6 are sequentially arranged from top to bottom, wherein a pressure sensor 4-1 and an acceleration sensor 4-3 are arranged in the sensor cabin 4, wherein the pressure sensor 4-1 is used to detect the pressure of the liquid column above the intelligent plunger body, wherein the acceleration sensor 4-3 is used to detect the speed of the intelligent plunger body, wherein a motor 5-1 is arranged in the motor cabin 5, wherein a guide hole 6-5 is opened on the side wall of the control flow channel cabin 6, wherein a throttle valve 6-4 is arranged in the control flow channel cabin 6, wherein the motor 5-1 is transmission-connected to the throttle valve 6-4, wherein the throttle valve 6-4 is used to block the guide hole 6-5;

[0032] The expansion sealing structure 7 includes a coupling 7-1, a tile 7-2 and a rubber sealing sleeve 7-3. The coupling 7-1 is connected to the lower end of the control flow channel chamber 6. A plurality of tiles 7-2 are provided, and the plurality of tiles 7-2 are circumferentially distributed on the circumferential side of the coupling 7-1. The rubber sealing sleeve 7-3 is sleeved on the circumferential side of the plurality of tiles 7-2. The throttle valve 6-4 is used to extend into the coupling 7-1 and to push the plurality of tiles 7-2 to move outward along the radial direction of the coupling 7-1.

[0033] Specifically, the pressure inlet port 4 - 2 is opened on the side wall of the sensor chamber 4 , and the probe of the pressure sensor 4 - 1 is set at the pressure inlet port 4 - 2 .

[0034] In this embodiment, during the downward phase, when the combined sealed water drainage and gas production intelligent plunger is falling, the acceleration sensor 4-3 and the pressure sensor 4-1 start to work, first the acceleration sensor 4-3. When the acceleration sensor 4-3 detects that the combined sealed water drainage and gas production intelligent plunger is moving downward too fast, the motor 5-1 drives the throttle valve 6-4 downward, closes a part of the guide holes 6-5, reduces the flow area of ​​the fluid to increase the resistance of the combined sealed water drainage and gas production intelligent plunger when it falls, and reduces the falling speed of the combined sealed water drainage and gas production intelligent plunger. In this way, the combined sealed water drainage and gas production intelligent plunger can be prevented from falling too fast and causing impact damage to the inner wall of the gas well, thereby preventing the combined sealed water drainage and gas production intelligent plunger from getting stuck or tilted, and ensuring its normal operation. At the same time, reducing the falling speed of the combined sealed water drainage and gas production intelligent plunger can avoid excessive disturbance of the fluid at the bottom of the combined sealed water drainage and gas production intelligent plunger, thereby affecting the gas production efficiency.

[0035] Secondly, the pressure sensor 4-1 works, and a solid interface is formed between the gas and the produced accumulated liquid after the combined sealed water drainage and gas production intelligent plunger enters the water. After the pressure sensor 4-1 detects that the pressure of the upper liquid column reaches a predetermined threshold, the motor 5-1 drives the throttle valve 6-4 downward to completely close the guide hole 6-5, thereby transforming the shape of the combined sealed water drainage and gas production intelligent plunger from a fast plunger to a solid plunger, so that the combined sealed water drainage and gas production intelligent plunger can hover in the water, thereby reducing the height of the combined sealed water drainage and gas production intelligent plunger falling in the gas well. If the pressure reaches a predetermined threshold and the acceleration sensor 4-3 still detects a downward speed, the pressure sensor 4-1 and the acceleration sensor 4-3 transmit information to the motor 5-1, and the motor 5-1 drives the throttle valve 6-4 to continue to move downward to push the tile 7-2 to move in the radial direction, so that the rubber sealing sleeve 7-3 expands and connects with the inner wall of the gas well to separate the gas and liquid above and below the rubber sealing sleeve 7-3, and then the gas below gradually increases, which can shorten the time for the lifting pressure difference to be formed and improve the efficiency of drainage and gas production.

[0036] During the upward stage, after a certain period of time after the combined sealed water drainage and gas production intelligent plunger enters the water, the energy accumulation at the bottom of the well is restored. When the casing pressure accumulation is restored to a certain value, the on-hole controller automatically opens the pneumatic diaphragm valve. After the well is opened for blowout, the bottom hole air pressure pushes the combined sealed water drainage and gas production intelligent plunger and the upper liquid to move upward in the gas well. At this time, if the rubber sealing sleeve 7-3 is in an expanded state, when the pressure is within a predetermined threshold and the upward speed is detected, the rubber sealing sleeve 7-3 is contracted. As the combined sealed water drainage and gas production intelligent plunger gradually rises, when it is detected that the upward speed exceeds the predetermined threshold, the rubber sealing sleeve 7-3 is controlled to expand to reduce the upward speed, so that the combined sealed water drainage and gas production intelligent plunger can effectively carry the fluid to the ground, while avoiding pressure fluctuations or equipment damage caused by excessive upward speed.

[0037] At the same time, the combined sealed water drainage and gas production intelligent plunger rises to the wellhead, the upper liquid flows away through the bypass pipe, the lower gas passes through the valve and enters the upper part to be collected, and the wellhead device salvages the combined sealed water drainage and gas production intelligent plunger through the catcher. As the upper liquid is discharged out of the well, the liquid column pressure becomes smaller and the upward speed is zero. The motor 5-1 drives the throttle valve 6-4 to move upward until the rubber sealing sleeve 7-3 shrinks and the guide hole 6-5 opens. The combined sealed water drainage and gas production intelligent plunger returns to its original shape, and can sink again and repeat the above process.

[0038] Therefore, by setting up the pressure sensor 4-1, the acceleration sensor 4-3, the motor 5-1 and the throttle valve 6-4, the downward and upward speeds of the combined sealed water drainage and gas production intelligent plunger can be controlled to avoid problems such as fluid disturbance and pressure fluctuation caused by excessive speed, which is beneficial to improving the efficiency of water drainage and gas production.

[0039] At the same time, the throttle valve 6 - 4 can be adjusted according to the signals of the acceleration sensor and the pressure sensor 4 - 1 , with a high degree of automation.

[0040] In addition, the drainage volume can be adjusted according to the pressure at the bottom of the well, which simplifies the drainage process. There is no need to change the well structure and equipment, and it can flexibly adapt to changes in the gas well.

[0041] Optionally, a composite column structure is provided on the inner side of the tile 7-2, a circular hole is opened on the circumference of the coupling 7-1, and the composite column structure passes through the circular hole and is located in the coupling 7-1.

[0042] At the same time, the coupling 7-1 has four circumferentially distributed circular holes, and the tile 7-2 is provided with four, which correspond to the four circular holes respectively.

[0043] In this embodiment, specifically, the composite column structure includes a hemisphere and a cylinder, one end of the cylinder is connected to the inner wall of the tile 7-2, and the other end is connected to the hemisphere. The throttle valve 6-4 extends into the coupling 7-1, contacts the hemisphere and pushes the hemisphere and the cylinder to move along the axial direction of the circular hole, so that the tile 7-2 moves along the radial direction of the coupling 7-1, so as to ensure that the rubber sealing sleeve 7-3 can expand along the radial direction of the gas well.

[0044] Alternatively, if Figure 2 and Figure 3 As shown, the control flow channel chamber 6 is provided with a lead screw push rod 6-1, a trapezoidal lead screw 6-2 and the throttle valve 6-4 from top to bottom in sequence, the motor 5-1 is used to be connected to the lead screw push rod 6-1, the lead screw push rod 6-1 is connected to the trapezoidal lead screw 6-2 through a screw pair, and is used to drive the trapezoidal lead screw to move in a vertical direction, and the trapezoidal lead screw 6-2 is connected to the throttle valve 6-4.

[0045] In this embodiment, a lead screw push rod 6-1 and a trapezoidal lead screw 6-2 are arranged in the control channel chamber 6, the lead screw push rod 6-1 is driven to rotate by the motor 5-1, and the lead screw push rod 6-1 is driven to move the trapezoidal lead screw in the vertical direction, and the trapezoidal lead screw 6-2 is connected to the throttle valve 6-4, which can drive the throttle valve 6-4 to move in the vertical direction, ensuring that the throttle valve 6-4 can close the guide hole 6-5 and push the tile 7-2 to move.

[0046] Alternatively, if Figure 2 and Figure 3 As shown, the expansion sealing structure 7 also includes an expansion water-stop ring 6-3, and the expansion water-stop ring 6-3 is circumferentially sleeved on the throttle valve 6-4.

[0047] In this embodiment, by setting an expansion water stop ring 6-3 on the throttle valve 6-4, water can be prevented from passing through the water stop ring and entering the control flow channel chamber 6, thereby preventing water from entering the sensor chamber 4 and the motor chamber 5, which is beneficial to ensure that the pressure sensor 4-1, the acceleration sensor 4-3 and the motor 5-1 can operate normally.

[0048] Alternatively, if Figure 2 and Figure 3 As shown, a diaphragm coupling 5-2 is also provided in the motor compartment 5, and two ends of the diaphragm coupling 5-2 are respectively connected to the motor 5-1 and the lead screw push rod 6-1.

[0049] In this embodiment, by setting a diaphragm coupling 5-2 to connect the motor 5-1 and the screw push rod 6-1, the motor 5-1 and the screw push rod 6-1 can be easily connected, so as to establish a transmission relationship between the motor 5-1 and the screw push rod 6-1, ensuring that the motor 5-1 can drive the screw push rod 6-1 to rotate.

[0050] Alternatively, if Figure 1 and Figure 2 As shown, the combined sealed drainage and gas production intelligent plunger also includes a radio transmission cabin 1, a battery cabin 2, a control cabin 3 and a sensor cabin 4. The radio transmission cabin 1, the battery cabin 2, the control cabin 3, the sensor cabin 4, the motor cabin 5 and the control flow channel cabin 6 are arranged in sequence from top to bottom and are interconnected, and are connected in sequence by threads.

[0051] In this embodiment, a radio transmission cabin 1, a battery cabin 2, a control cabin 3 and a sensor cabin 4 are arranged in sequence, and the radio transmission cabin 1, the battery cabin 2, the control cabin 3, the sensor cabin 4, the motor cabin 5 and the control flow channel cabin 6 are connected by threads. Specifically, O-rings are used to seal adjacent cabins, which can facilitate the formation of a combined sealed water drainage and gas collection intelligent plunger.

[0052] Alternatively, if Figure 2 As shown, a disc coil 1-2 is provided in the radio transmission cabin 1;

[0053] The battery compartment 2 is provided with a lithium battery 2-1, and the battery compartment 2 is provided with a wire introduction port, and the disc coil 1-2 passes through the wire introduction port and is connected to the lithium battery 2-1;

[0054] A control circuit board 3 - 1 is disposed in the control compartment 3 .

[0055] Specifically, an upper end cover 1-1 is provided at the upper end of the radio transmission cabin 1, and a fishing head is connected to the upper end cover 1-1. The disc coil 1-2 adopts a double disc shape of a planar resonant coil, and each coil is insulated from each other. The control circuit board 3-1 is provided with a serial peripheral interface SPI, a universal input and output interface GPIO, an asynchronous transceiver transmitter UART, an analog-to-digital converter ADC, a Flash memory, a radio frequency module and a micro control unit MCU. The serial peripheral interface SPI exchanges data with the acceleration sensor 4-3 and the Flash memory; the universal input and output interface GPIO receives information from the temperature sensor and controls the operation of the motor 5-1; the asynchronous transceiver transmitter UART exchanges information with the radio frequency module; the analog-to-digital converter ADC receives the signal of the pressure sensor 4-1, and the analog-to-digital converter ADC converts the analog signal transmitted by the pressure sensor 4-1 into a digital signal and inputs it into the micro control unit MCU.

[0056] In this embodiment, the pressure sensor 4-1 and the acceleration sensor 4-3 first transmit information to the control circuit board 3-1, and then the control circuit board 3-1 is used to control the motor 5-1 to operate. At the same time, the control circuit board 3-1, the motor 5-1, the pressure sensor 4-1 and the acceleration sensor 4-3 are powered by the lithium battery 2-1. Therefore, by designing the radio transmission cabin 1 and using the disc coil 1-2 for wireless power transmission, the stable operation of the system can be guaranteed, and frequent disassembly of the wellhead equipment and the combined sealed drainage and gas production intelligent plunger can be avoided.

[0057] Alternatively, if Figure 1 and Figure 2 As shown, the combined sealed drainage and gas production intelligent plunger also includes a turbulent sealing structure 8, which is connected to the lower end of the control channel chamber 6. The upper and lower ends of the turbulent sealing structure 8 are open, and a central channel 8-1 is opened inside.

[0058] In this embodiment, when the central flow channel 8-1 is open, liquid can pass through the central flow channel 8-1, increasing the flow area of ​​the fluid to reduce the resistance of the combined sealed water drainage and gas collection intelligent plunger when it falls, which is conducive to accelerating the downward speed of the plunger and shortening the downward time of the combined sealed water drainage and gas collection intelligent plunger. When the throttle valve 6-4 is used to descend into the turbulent sealing structure 8 to block the central flow channel 8-1, the liquid cannot pass through the central flow channel 8-1, which can slow down the downward speed of the combined sealed water drainage and gas collection intelligent plunger.

[0059] Optionally, an external plug sealing groove is opened on the outer side wall of the turbulence sealing structure 8, and the groove depth of the external plug sealing groove gradually increases from top to bottom.

[0060] In this embodiment, the external plug sealing groove is set to a circular arc groove type, and the circular arc groove type is selected with a groove width of 12mm, a groove spacing of 5mm, a number of grooves of 14, a gradual groove depth, and a variable groove circular arc groove with a groove depth height difference of △H=0.5mm in each group. According to numerical simulation analysis, this circular arc groove has the best sealing performance, that is, the optimal structure. It better solves the problems of gas upward and liquid reflux in the process of lifting the accumulated liquid by the combined sealed drainage and gas production intelligent plunger.

[0061] Alternatively, if Figure 2 As shown, a threaded cylindrical positioning pin 8-2 is provided on the inner side wall of the turbulence sealing structure 8, and the threaded cylindrical positioning pin 8-2 is used to prevent the throttle valve 6-4 from moving downward.

[0062] In this embodiment, a threaded cylindrical positioning pin 8-2 is provided on the inner side wall of the turbulent flow sealing structure 8, which can limit the throttle valve 6-4 to prevent the throttle valve 6-4 from excessively falling. At the same time, it can also prevent the throttle valve 6-4, the trapezoidal lead screw 6-2 and other structures from falling due to the control failure of the motor 5-1.

[0063] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined sealed drainage and gas collection intelligent plunger, characterized in that: It includes an intelligent plunger body and an expansion sealing structure (7); The intelligent plunger body comprises a sensor cabin (4), a motor cabin (5) and a control flow channel cabin (6), wherein the sensor cabin (4), the motor cabin (5) and the control flow channel cabin (6) are arranged in sequence from top to bottom, wherein a pressure sensor (4-1) and an acceleration sensor (4-3) are arranged in the sensor cabin (4), wherein the pressure sensor (4-1) is used to detect the pressure of a liquid column above the intelligent plunger body, and the acceleration sensor (4-3) is used to detect the speed of the intelligent plunger body, wherein a motor (5-1) is arranged in the motor cabin (5), a flow guide hole (6-5) is opened on the side wall of the control flow channel cabin (6), and a throttle valve (6-4) is arranged in the control flow channel cabin (6), wherein the motor (5-1) is transmission-connected to the throttle valve (6-4), and the throttle valve (6-4) is used to block the flow guide hole (6-5); The expansion sealing structure (7) comprises a coupling (7-1), a tile (7-2) and a rubber sealing sleeve (7-3); the coupling (7-1) is connected to the lower end of the control flow channel chamber (6); a plurality of tiles (7-2) are provided, and the plurality of tiles (7-2) are circumferentially distributed on the peripheral side of the coupling (7-1); the rubber sealing sleeve (7-3) is sleeved on the peripheral side of the plurality of tiles (7-2); the throttle valve (6-4) is used to extend into the coupling (7-1) and to push the plurality of tiles (7-2) to move outward along the radial direction of the coupling (7-1); The control flow channel chamber (6) is provided with a lead screw push rod (6-1), a trapezoidal lead screw (6-2) and the throttle valve (6-4) in sequence from top to bottom; the motor (5-1) is used to be connected to the lead screw push rod (6-1); the lead screw push rod (6-1) is connected to the trapezoidal lead screw (6-2) via a screw pair and is used to drive the trapezoidal lead screw to move in a vertical direction; the trapezoidal lead screw (6-2) is connected to the throttle valve (6-4).

2. The combined sealed drainage and gas collection intelligent plunger according to claim 1 is characterized in that: A composite column structure is arranged on the inner side of the tile (7-2), a circular hole is opened on the circumference of the coupling (7-1), and the composite column structure passes through the circular hole and is located in the coupling (7-1).

3. The combined sealed drainage and gas collection intelligent plunger according to claim 1 is characterized in that: The expansion sealing structure (7) further comprises an expansion water-stop ring (6-3), wherein the expansion water-stop ring (6-3) is circumferentially sleeved on the throttle valve (6-4).

4. The combined sealed drainage and gas collection intelligent plunger according to claim 1 is characterized in that: A diaphragm coupling (5-2) is also provided in the motor compartment (5), and two ends of the diaphragm coupling (5-2) are respectively connected to the motor (5-1) and the lead screw push rod (6-1).

5. The combined sealed drainage and gas collection intelligent plunger according to claim 1 is characterized in that: The invention also comprises a radio transmission compartment (1), a battery compartment (2), a control compartment (3) and a sensor compartment (4); the radio transmission compartment (1), the battery compartment (2), the control compartment (3), the sensor compartment (4), the motor compartment (5) and the control flow channel compartment (6) are arranged in sequence from top to bottom and are interconnected, and are connected in sequence by threads.

6. The combined sealed water drainage and gas collection intelligent plunger according to claim 5 is characterized in that: The radio transmission cabin (1) is provided with a disc-type coil (1-2); A lithium battery (2-1) is arranged in the battery compartment (2), a wire introduction port is provided in the battery compartment (2), and the disc-shaped coil (1-2) passes through the wire introduction port and is connected to the lithium battery (2-1); A control circuit board (3-1) is arranged in the control cabin (3).

7. The combined sealed water drainage and gas collection intelligent plunger according to claim 1 is characterized in that: It also includes a turbulent flow sealing structure (8), which is connected to the lower end of the control flow channel chamber (6), and the upper and lower ends of the turbulent flow sealing structure (8) are open, and a central flow channel (8-1) is opened inside.

8. The combined sealed water drainage and gas collection intelligent plunger according to claim 7 is characterized in that: An external plug sealing groove is provided on the outer side wall of the turbulent flow sealing structure (8), and the groove depth of the external plug sealing groove gradually increases from top to bottom.

9. The combined sealed water drainage and gas collection intelligent plunger according to claim 7 is characterized in that: A threaded cylindrical positioning pin (8-2) is provided on the inner side wall of the turbulent flow sealing structure (8), and the threaded cylindrical positioning pin (8-2) is used to prevent the throttle valve (6-4) from moving downward.

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