Stirring and filling device and method for fracture-forming water-drive plugging agent

Abstract

The invention belongs to the technical field of petroleum drilling, and provides a stirring and filling device and method for a fracturing crack-forming water-drive plugging agent, the device comprises a barrel, one end of the barrel is communicated with a water inlet connector used for being connected with a high-pressure pulse fracturing pump, and the other end of the barrel is communicated with a water outlet connector used for being connected with a hole packer; the stirring assembly comprises a stirring paddle and a hydraulic driving mechanism, the hydraulic driving mechanism is communicated with the water inlet connector, the water outlet end of the hydraulic driving mechanism is communicated with the interior of the barrel, and the stirring paddle is in transmission connection with the hydraulic driving mechanism; and the blocking agent adding assembly comprises a blocking agent storage tank communicating with the side wall of the barrel, the blocking agent storage tank is located on the side, away from the water outlet connector, of the stirring paddle, and a feeding mechanism used for feeding a blocking agent in the blocking agent storage tank into the barrel and preventing water in the barrel from entering the blocking agent storage tank is arranged in the blocking agent storage tank. Hydraulic driving is integrated, the effect of timely and automatic filling of the plugging agent is achieved, and the fracturing, crack-making and rock-breaking effects and the underground hard rock stratum tunneling efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of oil drilling technology, and particularly relates to a device and method for mixing and injecting fracturing water drive plugging agent. Background Technology

[0002] Hydraulic fracturing is a key technology in reservoir stimulation in oil and gas fields and coal mines. To overcome formation heterogeneity and increase the stimulation volume, temporary plugging fracturing is often employed. This process involves adding a temporary plugging agent to the fracturing fluid to dynamically seal existing initial fractures or dominant flow channels, thereby increasing the net pressure inside the wellbore or fractures. This forces subsequent fracturing fluid to deflect, opening new fractures or activating natural fractures in unstimulated sections, ultimately forming a complex fracture network. Especially in downhole hydraulic fracturing, traditional hydraulic fractures typically form single planar fractures along the direction of maximum principal stress rather than complex fracture networks, limiting their stimulation capacity and failing to adequately meet engineering requirements. Therefore, high-pressure pulse fracturing pumps are selected. Initial pulse fracturing with clean water is performed to create multiple fractures, followed by the injection of fracturing fluid containing a plugging agent for plugging and secondary fracturing operations.

[0003] Currently, the main methods for injecting plugging agents in surface oil and gas well fracturing operations include: 1. injecting through a vertical short section connected to the high-pressure manifold; 2. injecting using a sand mixing truck; 3. pre-loading the plugging agent into the tubing and injecting it multiple times by repeatedly disassembling and reassembling the tubing. However, these methods are generally cumbersome and labor-intensive. Furthermore, the pipeline is under high pressure during injection, requiring pressurized operation, which poses certain safety hazards and makes them unsuitable for underground fracturing and plugging operations in mines. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for mixing and injecting fracturing and sealing agents to solve the above-mentioned problems. By sealing hard rock formations downhole and then fracturing them, the overall strength of the rock is weakened and the tunneling efficiency is accelerated.

[0005] To achieve the above objectives, the present invention provides the following solution: a fracturing and fracture-creating water-drive sealing agent mixing and injection device, comprising: The cylinder has an inlet port for connecting a high-pressure pulse fracturing pump at one end and an outlet port for connecting a sealing device at the other end. The stirring assembly includes a stirring paddle and a hydraulic drive mechanism. The hydraulic drive mechanism is connected to the water inlet, and the water outlet of the hydraulic drive mechanism is connected to the inside of the cylinder. The stirring paddle is driven by the hydraulic drive mechanism. A plugging agent addition assembly includes a plugging agent storage tank connected to the side wall of the cylinder. The plugging agent storage tank is located on the side of the agitator away from the water outlet. A feeding mechanism is provided inside the plugging agent storage tank. The feeding mechanism is used to add the plugging agent in the plugging agent storage tank into the cylinder and prevent water in the cylinder from entering the plugging agent storage tank.

[0006] Preferably, the hydraulic drive mechanism includes a vortex shell fixedly connected to one end of the cylinder near the water inlet. The vortex shell is coaxially arranged with the cylinder. Rotating blades are rotatably connected inside the vortex shell. The rotating blades are coaxially arranged with the cylinder. High-pressure water enters the vortex shell through the water inlet and impacts the rotating blades to rotate. Then, it enters the cylinder through the water outlet in the middle of the vortex shell.

[0007] Preferably, one end of a connecting rod is coaxially fixedly connected to the end of the rotating blade away from the vortex shell, and the other end of the connecting rod is coaxially fixedly connected to the stirring paddle.

[0008] Preferably, the impeller blades are provided with several through holes.

[0009] Preferably, the feeding mechanism includes a discharge straight pipe, one end of the sealing agent storage tank is connected to the inside of the cylinder through the discharge straight pipe, a push rod is slidably connected inside the discharge straight pipe, a plurality of rings are fixedly sleeved at equal intervals on the side wall of the push rod, the plurality of rings are slidably connected to the inner wall of the discharge straight pipe, a feeding groove is formed between two adjacent rings and the discharge straight pipe, and a pushing drive component for driving the push rod to slide back and forth is provided between the sealing agent storage tank and the push rod.

[0010] Preferably, the driving component includes a hydraulic cylinder fixedly connected to the side of the sealing agent storage tank away from the discharge straight pipe, and the telescopic section of the hydraulic cylinder is fixedly connected coaxially to the end of the push rod away from the ring sleeve.

[0011] Preferably, it also includes a base frame, the cylinder is inclinedly and fixedly connected to the base frame, and the water outlet is located at the lower end of the cylinder.

[0012] Preferably, a drain port is fixedly connected to the side wall of the cylinder, the drain port is located at the lower end of the cylinder, and a valve is connected to the drain port.

[0013] Preferably, an observation hole is provided on the side wall of the cylinder, and a viewing window is fixedly connected inside the observation hole.

[0014] A method for using a fracturing fracture water-drive sealing agent mixing and injection device includes the following operating steps: Connect the inlet and outlet water interfaces to the high-pressure pulse fracturing pump and the sealing device respectively, and add sealing agent to the sealing agent storage tank; Start the high-pressure pulse fracturing pump so that high-pressure water passes through the cylinder and enters the sealing device to perform water fracturing on the horizontal wellbore; The high-pressure pulse fracturing pump is restarted, and the feeding mechanism is activated at the same time. The plugging agent in the plugging agent storage tank is controlled to enter the cylinder at a certain rate. The high-pressure water drives the agitator to rotate through the hydraulic drive mechanism, so that the high-pressure water and the plugging agent are mixed in the cylinder and then enter the sealing device to perform secondary fracturing on the horizontal wellbore.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: 1. This invention integrates hydraulic drive, mechanical stirring, and sealing agent dosing functions into the cylinder, realizing seamless connection and integrated operation of water fracturing, sealing agent injection, and sealing fracturing processes. The working mode can be quickly switched by controlling the feeding mechanism, which greatly simplifies the operation steps, reduces labor intensity, and effectively improves the safety of operation.

[0016] 2. By setting up a feeding mechanism, not only is automatic feeding of the plugging agent achieved, but the problem of the downhole high-pressure pulse fracturing pump being unable to pump plugging agents of different gradations, such as particles and fibers, is also solved. This avoids the situation where a large amount of water flows back into the plugging agent storage tank, ensuring the reliability of feeding and the effectiveness of the plugging agent. It can support a single large addition of the plugging agent to the storage tank, further simplifying the operation of the staff. By plugging the hard rock formations downhole and turning to pulse fracturing to create complex fracture networks, the overall strength of the rock formation is weakened, and the tunneling efficiency is accelerated. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the stirring and dispensing device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the stirring and dispensing device of the present invention; Figure 3 This is a cross-sectional schematic diagram of the sealing agent addition component of the present invention; Figure 4 This is a schematic diagram showing the connection of the stirring and injection device of the present invention in a sealing and fracturing system; The components include: 1. cylinder; 2. water inlet; 3. water outlet; 4. agitator; 5. sealing agent storage tank; 6. rotating blade; 7. connecting rod; 8. through hole; 9. discharge straight pipe; 10. push rod; 11. ring sleeve; 12. feeding trough; 13. hydraulic cylinder; 14. volute; 15. base frame; 16. drain outlet; 17. valve; 18. observation hole; 19. viewing window glass; 20. high-pressure pulse fracturing pump; and 21. sealing device. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-4 This invention provides a fracturing and fracture sealing agent mixing and injection device, comprising: The cylinder 1 has an inlet 2 for connecting a high-pressure pulse fracturing pump 20 at one end and an outlet 3 for connecting a sealing device 21 at the other end. The stirring assembly includes a stirring paddle 4 and a hydraulic drive mechanism. The hydraulic drive mechanism is connected to the water inlet 2, and the water outlet of the hydraulic drive mechanism is connected to the inside of the cylinder 1. The stirring paddle 4 is connected to the hydraulic drive mechanism via a transmission. The plugging agent addition assembly includes a plugging agent storage tank 5 connected to the side wall of the cylinder 1. The plugging agent storage tank 5 is located on the side of the agitator 4 away from the water outlet 3. A feeding mechanism is provided inside the plugging agent storage tank 5. The feeding mechanism is used to add the plugging agent in the plugging agent storage tank 5 into the cylinder 1 and prevent water in the cylinder 1 from entering the plugging agent storage tank 5.

[0022] The high-pressure pulse fracturing pump 20 injects high-pressure water into the cylinder 1 through the inlet port 2 and flows into the sealing device 21 through the outlet port 3, thereby achieving hydraulic fracturing of the wellbore. The main function of the stirring paddle 4 is to mix the water and the sealing agent evenly by stirring the water in the cylinder 1 after the sealing agent enters it. The main function of the hydraulic drive mechanism is to rotate by the impact of the high-pressure water flowing in from the inlet port 2, and finally drive the stirring paddle 4 to rotate. The main function of the sealing agent storage tank 5 is to store the sealing agent required for fracturing. The main function of the feeding mechanism is to automatically feed the sealing agent into the cylinder 1, so that it mixes with the water. At the same time, the feeding mechanism also prevents a large amount of high-pressure water in the cylinder 1 from flowing back into the sealing agent storage tank 5. Overall, this invention integrates hydraulic drive, mechanical stirring, and plugging agent dosing functions into the cylinder, achieving seamless connection and integrated operation of water fracturing, plugging agent injection, and plugging fracturing processes. The working mode can be quickly switched by controlling the feeding mechanism, which greatly simplifies the operation steps and reduces labor intensity. At the same time, the feeding mechanism not only realizes the automatic feeding of plugging agent, but also avoids the situation where a large amount of water flows back into the plugging agent storage tank, which can support a single large addition to the plugging agent storage tank, further simplifying the operation of the staff.

[0023] The scheme is further optimized. The hydraulic drive mechanism includes a vortex shell 14 fixedly connected to one end of the cylinder 1 near the water inlet 2. The vortex shell 14 is coaxial with the cylinder 1. A rotating blade 6 is rotatably connected inside the vortex shell 14. The rotating blade 6 is coaxial with the cylinder 1. High-pressure water enters the vortex shell 14 through the water inlet 2 and impacts the rotating blade 6 to rotate. Then, it enters the cylinder 1 through the water outlet in the middle of the vortex shell 14.

[0024] like Figure 2 As shown, high-pressure water enters the vortex shell 14, flows circumferentially within the vortex shell 14, and impacts the rotating blades 6, causing the rotating blades 6 to rotate at high speed under the impact of the water. Afterward, the high-pressure water flows out from the circular opening in the middle of the vortex shell 14 along the rotating blades 6 and enters the cylinder 1.

[0025] In a further optimized design, one end of the rotating blade 6, which is away from the vortex shell 14, is coaxially and fixedly connected to one end of the connecting rod 7, and the other end of the connecting rod 7 is coaxially and fixedly connected to the stirring paddle 4.

[0026] like Figure 2 As shown, when the rotating blade 6 rotates at a high speed, it drives the stirring paddle 4 to rotate in the cylinder 1 through the connecting rod 7, thereby realizing the stirring of the liquid in the cylinder 1, accelerating the mixing of high-pressure water and sealing agent, so that the sealing agent can be mixed as the high-pressure water flows from the cylinder 1 from the water inlet 2 to the water outlet 3.

[0027] To further optimize the design, several through holes 8 are provided on the blades of the stirring paddle 4.

[0028] like Figure 2 As shown, in this embodiment, fibrous or granular plugging agents can be used. For fibrous plugging agents, the added through holes 8 can be used to disperse them, further ensuring that the plugging agent is quickly and evenly mixed in the flowing water.

[0029] The scheme is further optimized. The feeding mechanism includes a discharge straight pipe 9. One end of the sealing agent storage tank 5 is connected to the inside of the cylinder 1 through the discharge straight pipe 9. A push rod 10 is slidably connected inside the discharge straight pipe 9. Several ring sleeves 11 are fixedly sleeved at equal intervals on the side wall of the push rod 10. The ring sleeves 11 are slidably connected to the inner wall of the discharge straight pipe 9. A feeding groove 12 is formed between two adjacent ring sleeves 11 and the discharge straight pipe 9. A push drive component for driving the push rod 10 to slide back and forth is provided between the sealing agent storage tank 5 and the push rod 10.

[0030] like Figure 2 and Figure 3 As shown, multiple feeding troughs 12 are formed between the push rod 10, several rings 11, and the discharge straight pipe 9, arranged along the axis of the discharge straight pipe 9. When the pusher drives the push rod 10 to move into the sealing agent storage tank 5, the rings 11 located above enter the sealing agent storage tank 5. Subsequently, as the push rod 10 moves in the opposite direction, the rings 11 push the sealing agent in contact with them into the discharge straight pipe 9, where the sealing agent is conveyed towards the cylinder 1 in the feeding troughs 12 formed with the discharge straight pipe 9. When the tail end of the push rod 10 extends from the discharge straight pipe 9 into the cylinder 1, the sealing agent on the rings 11 enters the cylinder 1 together, falls off under the impact of the water flow, and mixes with the water.

[0031] In this embodiment, as the push rod 10 moves toward the sealing agent storage tank 5, the end ring 11 of the push rod 10 always maintains a sealed contact with the discharge straight pipe 9. Similarly, as the push rod 10 moves toward the cylinder 1, the ring 11 closest to the push drive component always maintains a sealed contact with the discharge straight pipe 9 to prevent water from entering the sealing agent storage tank 5.

[0032] Further optimization of the scheme involves driving a hydraulic cylinder 13 fixedly connected to the side of the sealing agent storage tank 5 away from the discharge straight pipe 9. The telescopic section of the hydraulic cylinder 13 is fixedly connected to the end of the push rod 10 away from the ring sleeve 11 on the same axis.

[0033] like Figure 2 and Figure 3 As shown, in this embodiment, the reciprocating movement of the hydraulic cylinder 13 drives the push rod 10 to reciprocate. By controlling the reciprocating speed of the hydraulic cylinder 13, the feeding speed into the cylinder 1 can be changed, thereby quickly generating fracturing fluids with different sealing agent concentrations. Closing the hydraulic cylinder 13 allows for water fracturing, thus achieving integrated sealing-fracturing operation and simplifying the process.

[0034] like Figure 2 As shown, the top of the plugging agent storage tank 5 is connected to the hydraulic cylinder 13 via a flange. Before wellbore fracturing, after adding plugging agent to the plugging agent storage tank 5, the hydraulic cylinder 13 can be fixedly connected to the plugging agent storage tank 5 through the flange structure.

[0035] Further optimization of the scheme also includes a base frame 15, with the cylinder 1 tilted and fixedly connected to the base frame 15, and the water outlet 3 located at the lower end of the cylinder 1.

[0036] In a further optimized design, a drain port 16 is fixedly connected to the side wall of the cylinder 1. The drain port 16 is located on the lower end of the cylinder 1, and a valve 17 is connected to the drain port 16.

[0037] The design was further optimized by adding a second valve to the water outlet 3 to control the opening and closing of the water outlet 3.

[0038] like Figure 1 As shown, since fiber-based or granular sealing agents are used in this embodiment, large clumps of particles will inevitably settle inside the cylinder 1 during use. At this time, the sediment in the cylinder 1 can be removed by opening valve 17 and closing water outlet 3 at the same time, and then pouring clean water into the cylinder through water inlet 2 to clean the inside of the cylinder 1.

[0039] To further optimize the design, an observation hole 18 is provided on the side wall of the cylinder 1, and a viewing window glass 19 is fixedly connected inside the observation hole 18.

[0040] like Figure 1 As shown, by setting a viewing window 19 on the cylinder 1, it is convenient for on-site personnel to observe the water mixing situation inside the cylinder 1, and at the same time, it is convenient to observe the sedimentation situation at the bottom of the cylinder 1.

[0041] A method for using a fracturing fracture water-drive sealing agent mixing and injection device includes the following operating steps: Connect the inlet 2 and outlet 3 to the high-pressure pulse fracturing pump 20 and the sealing device 21 respectively, and add sealing agent to the sealing agent storage tank 5; Start the high-pressure pulse fracturing pump 20 so that high-pressure water passes through the cylinder 1 and enters the sealing device 21 to perform clean water fracturing on the horizontal wellbore; The high-pressure pulse fracturing pump 20 is restarted, and the feeding mechanism is started at the same time. The plugging agent in the plugging agent storage tank 5 is controlled to enter the cylinder 1 at a certain rate. The high-pressure water drives the stirring paddle 4 to rotate through the hydraulic drive mechanism, so that the high-pressure water and the plugging agent are mixed in the cylinder 1 and then enter the sealing device 21 to perform secondary fracturing on the horizontal wellbore.

[0042] Specifically, such as Figure 1 and Figure 4As shown in this embodiment, the sealing agent stirring and adding device of the present invention is first placed on site, the outlet of the high-pressure pulse fracturing pump 20 is connected to the inlet interface 2 through a pipeline, and the outlet interface 3 is connected to the sealing device 21 through a pipeline, and sufficient sealing agent is added to the sealing agent storage tank 5.

[0043] Afterwards, the sealing device 21 is advanced to the designated position, and the high-pressure pulse fracturing pump 20 is started, so that high-pressure water flows through the cylinder 1 to the sealing device. The fracturing operation is carried out by injecting high-pressure water between the two sealing devices 21.

[0044] Afterwards, the hydraulic cylinder 13 is controlled to move back and forth, driving the push rod 10 to move back and forth at a certain speed, and the sealing agent is fed into the cylinder 1 at a suitable feeding speed. Under the stirring action of the agitator 4, it mixes with the high-pressure water in the cylinder 1 to form fracturing fluid, which is then injected between the two sealing devices 21 to perform sealing and fracturing operations inside the horizontal wellbore. When the water pressure rises to a level higher than the peak water pressure of the original clear water fracturing, it indicates that the fracture inside the hole has been effectively sealed. Then, the hydraulic cylinder 13 is controlled to stop operating, and clear water is used to perform secondary fracturing on the horizontal wellbore. Through the dynamic sealing and turning mechanism brought about by the sealing agent, the static pressure inside the wellbore or fracture is increased, overcoming the heterogeneity of the formation. By sealing the initial fracture, the net pressure inside the wellbore or fracture is increased, forcing the fluid to turn. In the unmodified section, new fractures are opened or natural fractures are activated by turning, achieving more efficient rock mass modification, so as to achieve a good effect of sealing and fracturing rock breaking in hard rock tunnels.

[0045] After completing the work in this section, retreat a certain distance along the wellbore to the next fracturing location and repeat the above work to continue the pressure operation.

[0046] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0047] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for mixing and injecting a water-driven fracturing sealant, characterized in that, include: The cylinder (1) has an inlet (2) for connecting a high-pressure pulse fracturing pump (20) at one end and an outlet (3) for connecting a sealing device (21) at the other end. The stirring assembly includes a stirring paddle (4) and a hydraulic drive mechanism. The hydraulic drive mechanism is connected to the water inlet (2), and the water outlet of the hydraulic drive mechanism is connected to the inside of the cylinder (1). The stirring paddle (4) is connected to the hydraulic drive mechanism in a transmission manner. The plugging agent addition assembly includes a plugging agent storage tank (5) connected to the side wall of the cylinder (1). The plugging agent storage tank (5) is located on the side of the agitator (4) away from the water outlet (3). A feeding mechanism is provided inside the plugging agent storage tank (5). The feeding mechanism is used to add the plugging agent in the plugging agent storage tank (5) into the cylinder (1) and prevent water in the cylinder (1) from entering the plugging agent storage tank (5).

2. The fracturing and sealing agent mixing and injection device according to claim 1, characterized in that: The hydraulic drive mechanism includes a vortex shell (14) fixedly connected to one end of the cylinder (1) near the water inlet (2). The vortex shell (14) is coaxially arranged with the cylinder (1). A rotating blade (6) is rotatably connected inside the vortex shell (14). The rotating blade (6) is coaxially arranged with the cylinder (1). High-pressure water enters the vortex shell (14) through the water inlet (2) and impacts the rotating blade (6) to rotate. Then, it enters the cylinder (1) through the outlet in the middle of the vortex shell (14).

3. The fracturing and sealing agent mixing and injection device according to claim 2, characterized in that: One end of the rotating blade (6) away from the vortex shell (14) is coaxially fixedly connected to one end of the connecting rod (7), and the other end of the connecting rod (7) is coaxially fixedly connected to the stirring paddle (4).

4. The fracturing and sealing agent mixing and injection device according to claim 1, characterized in that: The impeller (4) has several through holes (8) on its blades.

5. The fracturing and sealing agent mixing and injection device according to claim 1, characterized in that: The feeding mechanism includes a discharge straight pipe (9). One end of the sealing agent storage tank (5) is connected to the inside of the cylinder (1) through the discharge straight pipe (9). A push rod (10) is slidably connected inside the discharge straight pipe (9). Several ring sleeves (11) are fixedly sleeved at equal intervals on the side wall of the push rod (10). Several ring sleeves (11) are slidably connected to the inner wall of the discharge straight pipe (9). A feeding groove (12) is formed between two adjacent ring sleeves (11) and the discharge straight pipe (9). A push drive component for driving the push rod (10) to slide back and forth is provided between the sealing agent storage tank (5) and the push rod (10).

6. The fracturing and sealing agent mixing and injection device according to claim 5, characterized in that: The driving component includes a hydraulic cylinder (13) fixedly connected to the side of the sealing agent storage tank (5) away from the discharge straight pipe (9), and the telescopic section of the hydraulic cylinder (13) is fixedly connected to the end of the push rod (10) away from the ring sleeve (11) on the same axis.

7. The fracturing and sealing agent mixing and injection device according to claim 1, characterized in that: It also includes a base frame (15), the cylinder (1) is fixedly connected to the base frame (15) at an incline, and the water outlet (3) is located at the lower end of the cylinder (1).

8. The fracturing and sealing agent mixing and injection device according to claim 7, characterized in that: A drain port (16) is fixedly connected to the side wall of the cylinder (1). The drain port (16) is located at the lower end of the cylinder (1). A valve (17) is connected to the drain port (16).

9. The fracturing and sealing agent mixing and injection device according to claim 7, characterized in that: An observation hole (18) is provided on the side wall of the cylinder (1), and a viewing window (19) is fixedly connected inside the observation hole (18).

10. A method of using a fracturing fracture water-drive plugging agent mixing and injection device, based on the fracturing fracture water-drive plugging agent mixing and injection device according to claim 1, characterized in that, The following steps are included: Connect the inlet (2) and outlet (3) to the high-pressure pulse fracturing pump (20) and the sealing device (21) respectively, and add sealing agent to the sealing agent storage tank (5); Start the high-pressure pulse fracturing pump (20) so that high-pressure water passes through the cylinder (1) and enters the sealing device (21) to perform water fracturing on the horizontal wellbore; The high-pressure pulse fracturing pump (20) is restarted, and the feeding mechanism is started at the same time. The sealing agent in the sealing agent storage tank (5) is controlled to enter the cylinder (1) at a certain rate. The high-pressure water drives the stirring paddle (4) to rotate through the hydraulic drive mechanism, so that the high-pressure water and the sealing agent are mixed in the cylinder (1) and then enter the sealing device (21) to perform secondary fracturing on the horizontal wellbore.

Images