Directional hydraulic fracturing device for underground hydraulic fracturing equipment

Abstract

The invention relates to the technical field of underground hydraulic fracturing, and discloses a directional hydraulic fracturing device for underground hydraulic fracturing equipment, which comprises a fracturing pipe body, and the outer edge of the fracturing pipe body is fixedly sleeved with an exhaust funnel. Gas is extruded by fracturing fluid and supplies gas to the interior of a notch through a filter screen and an electromagnetic valve gas inlet pipe, propelling blades are pushed to rotate, nozzles are driven to conduct position adjustment, an angle sensor is used for assisting in detection that the nozzles at the needed angle are in butt joint with the electromagnetic valve liquid inlet pipe, and an electric telescopic rod is used for driving a friction clamping plate to clamp and limit the propelling blades. Gas enters the main clamping cylinder through the electromagnetic valve main clamping pipe, the auxiliary drum membrane deforms to further clamp and seal the self-adaptive plugging device, and the electromagnetic valve main clamping pipe is closed, so that the angle of the nozzle is convenient to adjust, and meanwhile, the sealing stability of the self-adaptive plugging device is further improved; auxiliary gas is exhausted from the electromagnetic valve main exhaust pipe and the center of the fracturing pipe body, and gas explosion caused by extrusion of gas in the device is avoided.

Description

Technical Field

[0001] This invention relates to the field of downhole hydraulic fracturing technology, specifically to a directional hydraulic fracturing device for downhole hydraulic fracturing equipment. Background Technology

[0002] Downhole hydraulic fracturing equipment is a specialized equipment system used for fracturing and transforming downhole formations. Its core function is to "deliver fracturing fluid under high pressure to create / expand fractures in the formation and support the fractures," thereby achieving goals such as increasing coal seam permeability, increasing oil and gas reservoir production, and relieving roof pressure. It is not a single piece of equipment, but a collaborative working system composed of three major modules: "surface power system, downhole operation system, and monitoring and control system." It needs to be adapted to the narrow space, high pressure environment, and complex geological conditions of downholes.

[0003] Traditional downhole hydraulic fracturing equipment involves drilling a vertical borehole, installing the fracturing tube into the borehole, isolating the fracturing section using an adaptive plug, and supplying fracturing fluid into the fracturing tube. Its core requirements are to achieve efficient and safe formation stimulation by precisely controlling the fracturing fluid injection direction, stably isolating multiple fracturing zones, and mitigating the risks of downhole gas explosions and impurity blockage. However, current downhole fracturing equipment faces significant technical bottlenecks in the coordinated design of "venting and pressure control, directional drive, and multi-stage protection," making it difficult to meet the refined fracturing requirements under complex geological conditions. Specific problems include: I. Technical defects in venting of fractured pipes and prevention of gas explosion 1. Top-mounted single vent valve design: A simple vent valve is installed only at the top of the fracturing tube, relying on the natural squeezing of water flow to release air. However, the water flow in the vertical fracturing tube is downward due to gravity and cannot be completely discharged through the top-mounted vent valve. Especially when the fracturing fluid contains proppant, proppant deposition can easily block the venting channel, leading to increased gas retention and a higher risk of gas explosion. 2. The existing exhaust structure only focuses on "gas discharge" and does not convert gas energy into useful power, resulting in redundant equipment functions; II. Poor directional synergy between multi-stage fracturing isolation and fracturing The existing multi-stage fracturing mainly adopts the "single packer + multiple pipe pulling and lowering" mode, that is, after fracturing a stage, the entire fracturing pipe is pulled out, the packer position is changed, and the pipe is lowered again. This not only has low construction efficiency, but also easily leads to the failure of the initial directional accuracy with each pipe pulling and lowering. 3. Weak ability to clean internal walls and control impurities Existing fracturing pipes mostly rely on "fracturing fluid flushing" to clean the inner wall. However, the water flow is disordered, which is not efficient enough in flushing the coal slime and rock cuttings adhering to the inner wall of the pipe. Long-term operation can easily lead to nozzle blockage and narrowing of the air passage, forcing the equipment to be taken out for maintenance in advance and shortening the operation cycle. Although some solutions that add scraper cleaning structures can improve the cleaning effect, the scraper is prone to interference with directional components and packers, and wears out quickly, increasing maintenance costs. Summary of the Invention

[0004] This invention provides a directional hydraulic fracturing device for downhole hydraulic fracturing equipment to solve the problems mentioned in the background art.

[0005] This invention provides the following technical solution: a directional hydraulic fracturing device for downhole hydraulic fracturing equipment, comprising a fracturing tube body, an exhaust pipe fixedly sleeved on the outer edge of the fracturing tube body, a sleeve provided at the bottom of the fracturing tube body, a cylinder rotatably sleeved on the outer edge of the sleeve, a nozzle fixedly sleeved on the inner wall of the cylinder, an annular groove formed on the inner wall of the cylinder, an arc-shaped plate fixedly sleeved on the inner wall of the annular groove, an arc-shaped groove formed on the inner wall of the arc-shaped plate, a solenoid valve inlet pipe fixedly sleeved on the inner wall of the sleeve, and the inner wall of the solenoid valve inlet pipe communicating with the inner wall of the nozzle, a propulsion blade fixedly mounted at the bottom of the cylinder, and a threaded protrusion fixedly sleeved on the inner wall of the fracturing tube body.

[0006] As a preferred embodiment of the present invention, a main clamping cylinder is fixedly assembled at the bottom of the sleeve, a diaphragm is fixedly sleeved on the inner wall of the main clamping cylinder, and an adaptive plug is threadedly connected to the inner wall of the threaded protrusion, with the outer edge of the adaptive plug tightly attached to the inner wall of the diaphragm.

[0007] As a preferred embodiment of the present invention, a pressure sensor is fixedly mounted on the inner wall near the bottom of the main clamping cylinder, a permanent magnet mark is fixedly mounted on the inner wall of the main clamping cylinder, and a miniature magnetic sensor is fixedly mounted on the inner wall of the adaptive plugger, and the miniature magnetic sensor is electrically connected to the permanent magnet mark.

[0008] As a preferred embodiment of the present invention, a slot is provided on the inner wall of the sleeve near the bottom. The bottom of the inner wall of the slot is rotatably connected to the bottom of the propulsion blade. A filter screen is fixedly sleeved on the inner wall of the sleeve near the bottom, and a solenoid valve air inlet pipe is fixedly mounted on the side of the filter screen. The inner wall of the sleeve is connected to the inner wall of the slot through the inner wall of the filter screen and the inner wall of the solenoid valve air inlet pipe.

[0009] As a preferred embodiment of the present invention, an electric telescopic rod is fixedly mounted on the inner wall of the slot, and a friction clamping plate is fixedly mounted on the side of the electric telescopic rod. The shape and size of the inner wall of the friction clamping plate are adapted to the shape and size of the outer edge of the propulsion blade. An angle sensor is fixedly mounted on the inner wall of the sleeve near the top, and the angle sensor is electrically connected to the electric telescopic rod.

[0010] As a preferred embodiment of the present invention, a solenoid valve connecting pipe is fixedly sleeved on the inner wall of the sleeve near the top. A connecting groove 1 is opened at the top of the cylinder, a connecting groove 2 is opened at the bottom of the cylinder, and a communicating groove is opened at the bottom of the sleeve. A solenoid valve main clamping pipe is fixedly sleeved on the inner wall of the communicating groove, and the inner wall of the solenoid valve main clamping pipe is connected to the inner wall of the main clamping cylinder. The inner wall of the groove is connected to the inner wall of the sleeve near the top through the inner wall of the connecting groove 2, the inner wall of the annular groove, and the inner wall of the connecting groove 1. The solenoid valve main clamping pipe is electrically connected to the pressure sensor.

[0011] As a preferred embodiment of the present invention, the top of the cylinder is provided with a connecting groove three, and there are two connecting grooves two in number. The inner wall of the connecting groove three is connected to the inner wall of the sleeve near the bottom through the inner wall of the arc-shaped groove and the inner wall of the connecting groove two away from the connecting groove one.

[0012] As a preferred embodiment of the present invention, a solenoid valve main exhaust pipe is fixedly sleeved on the inner wall near the top of the exhaust pipe, a top clamping cylinder is fixedly assembled at the bottom of the exhaust pipe, a secondary clamping cylinder is fixedly assembled at the top of the sleeve, a solenoid valve secondary clamping pipe is fixedly sleeved on the top of the inner wall of the secondary clamping cylinder, and there are four secondary clamping cylinders, and the connection structure at the top of the four secondary clamping cylinders is completely consistent with the connection structure at the top of the main clamping cylinder.

[0013] As a preferred embodiment of the present invention, the number of threaded protrusions is five, and the five threaded protrusions are arranged in a vertical array in the inner wall of the fracturing tube body. The distance between the five threaded protrusions is a, the height of the tympanic membrane is b, and b = a, the height of the adaptive occluder is c, and c > b. When the center of the adaptive occluder is at the same height as the center of the tympanic membrane, the inner wall of the adaptive occluder near the top and the inner wall of the adaptive occluder near the bottom are threadedly connected to the threaded protrusions near the top and the threaded protrusions near the bottom of the tympanic membrane, respectively. The bottom of the main clamping cylinder is fixedly equipped with a base, and the shape and size of the inner wall of the base near the bottom are adapted to the shape and size of the outer edge of the adaptive occluder.

[0014] As a preferred embodiment of the present invention, the inner wall of the cylinder is provided with five nozzles, and the five nozzles and the arc-shaped plate are evenly distributed in the inner wall of the annular groove, and the orientation of the five nozzles away from the inner wall of the cylinder is not the same.

[0015] The present invention has the following beneficial effects: 1. This downhole hydraulic fracturing equipment uses a directional hydraulic fracturing device. Through the combined use of a filter screen and a solenoid valve air inlet pipe, gas is compressed by fracturing fluid and passes through the filter screen and solenoid valve air inlet pipe to supply gas into the slot. This gas drives the propeller blade to rotate the cylinder, which in turn drives the nozzle to adjust its position. An angle sensor assists in detecting the required nozzle angle and aligning it with the solenoid valve inlet pipe. Then, an electric telescopic rod drives a friction clamping plate to clamp and limit the propeller blade, ensuring that the gas is discharged externally through the solenoid valve's main exhaust pipe. When the gas enters the inner wall of the slot, it passes through the main clamping pipe of the solenoid valve to the inside of the main clamping cylinder, thereby assisting the diaphragm deformation to further assist the clamping and sealing of the adaptive plugger, and closing the main clamping pipe of the solenoid valve. This facilitates the adjustment of the nozzle angle and further improves the sealing stability of the adaptive plugger. The auxiliary gas is discharged upward through the annular groove and arc groove using the slot opening, and the auxiliary gas is discharged to the outside using the main exhaust pipe of the solenoid valve. Thus, the auxiliary gas is discharged from the center of the main exhaust pipe of the solenoid valve and the fracturing tube body, further preventing the gas inside the device from being compressed and causing a gas explosion.

[0016] 2. This downhole hydraulic fracturing equipment uses a directional hydraulic fracturing device. Through the cooperation of the threaded protrusion and the fracturing tube body, fracturing fluid is supplied to the top of the fracturing tube body. The fracturing fluid moves down along the threaded protrusion to assist in flushing the inside of the fracturing tube body and to squeeze the gas inside the fracturing tube body downward. The fracturing fluid guided by the threaded protrusion is kept stable by the velocity gradient of "flow along the wall and weak flow in the center". Thus, while flushing the inside of the fracturing tube body, the gas squeezing efficiency is weakened, thereby reducing the risk of gas explosion.

[0017] 3. This downhole hydraulic fracturing equipment uses a directional hydraulic fracturing device. After the fracturing fluid is supplied to the outside through the nozzle near the bottom, the solenoid valve main clamping pipe is opened to assist the diaphragm reset. The external mounting structure is connected to the adaptive plugger, and the adaptive plugger is driven to rotate and move upward along the threaded protrusion until the adaptive plugger moves to the same horizontal plane as the diaphragm at the bottom of the next fracturing point. Then, a secondary fracturing fluid is supplied to the inside of the fracturing tube body, thereby assisting the adaptive plugger to be in the lower limit of the diaphragm and assisting the nozzle to adjust its position, thereby improving the operating efficiency of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the front section structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the side cross-section of the friction clamping plate of the present invention; Figure 5 This is a schematic diagram of the front section structure of the main clamping cylinder of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the side cross-sectional planar structure of the arc-shaped plate of the present invention; Figure 8 This is a schematic diagram of the cylindrical side section structure of the present invention; Figure 9 This is a schematic diagram of the threaded convex strip structure of the present invention; Figure 10 This is a schematic diagram of the nozzle structure of the present invention; Figure 11 This is a schematic diagram of the front section structure of the main clamping cylinder of the present invention.

[0019] In the diagram: 1. Fracturing tube body; 2. Sleeve; 3. Solenoid valve connecting pipe; 4. Cylinder; 5. Nozzle; 6. Arc-shaped plate; 7. Friction clamping plate; 8. Electric telescopic rod; 9. Propeller blade; 10. Filter screen; 11. Solenoid valve air inlet pipe; 12. Connecting groove; 13. Main clamping cylinder; 14. Diaphragm; 15. Solenoid valve main clamping pipe; 16. Connecting groove two; 17. Connecting groove one; 18. Connecting groove three; 19. Threaded protrusion; 20. Pressure sensor; 21. Permanent magnet mark; 22. Secondary clamping cylinder; 23. Solenoid valve secondary clamping pipe; 24. Adaptive plug; 25. Annular groove; 26. Base; 27. Solenoid valve main exhaust pipe; 28. Top clamping cylinder; 29. ​​Groove; 30. Arc-shaped groove; 31. Exhaust pipe; 32. Solenoid valve liquid inlet pipe. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-11A directional hydraulic fracturing device for downhole hydraulic fracturing equipment includes a fracturing tube body 1, an exhaust pipe 31 fixedly sleeved on the outer edge of the fracturing tube body 1, a sleeve 2 provided at the bottom of the fracturing tube body 1, a cylinder 4 rotatably sleeved on the outer edge of the sleeve 2, a nozzle 5 fixedly sleeved on the inner wall of the cylinder 4, an annular groove 25 formed on the inner wall of the cylinder 4, an arc-shaped plate 6 fixedly sleeved on the inner wall of the annular groove 25, an arc-shaped groove 30 formed on the inner wall of the arc-shaped plate 6, and the inner wall of the sleeve 2 fixedly sleeved... A solenoid valve inlet pipe 32 is connected, and the inner wall of the solenoid valve inlet pipe 32 is connected to the inner wall of the nozzle 5. A propeller blade 9 is fixedly installed at the bottom of the cylinder 4. A threaded protrusion 19 is fixedly sleeved on the inner wall of the fracturing tube body 1. Fracturing fluid is injected from the top of the fracturing tube body 1. The threaded protrusion 19 is designed as a right-handed spiral, which is consistent with the natural deflection direction of the water flow. This can reduce the "reverse friction" between the fracturing fluid flow and the threaded protrusion 19, making the spiral flow along the wall smoother and further enhancing the central weak flow. The flow is reduced and guided by the right-hand threaded protrusion 19 at the top, forming a spiral flow along the wall. When the fracturing fluid flows close to the inner wall, its scouring force can wash the coal slime and rock cuttings attached to the inner wall to the top of the adaptive plug 24 at the bottom of the device, realizing "auxiliary cleaning". When the adaptive plug 24 is removed from the inside of the device, it helps to concentrate and clean impurities. The width of the threaded protrusion 19 needs to match the inner diameter (D) of the fracturing tube. The ratio range of "width = (0.06-0.08) × D" is adopted. The threaded protrusion 19 can occupy enough radial space (reducing the flow range in the center) without excessively squeezing the water flow channel. The width of the threaded protrusion 19 is in a reasonable range to ensure that 70% to 80% of the fracturing fluid spirals along the wall, and only 20% to 30% of the flow is weak in the center of the fracturing tube body 1. Through the cooperation of the annular groove 25 and the arc groove 30, it is ensured that when the gas inside the device is squeezed and moved upward to be discharged, it moves upward stably through the inner wall of the annular groove 25 and the inner wall of the arc groove 30.

[0022] In a preferred embodiment, a main clamping sleeve 13 is fixedly mounted on the bottom of the sleeve 2. A tympanic membrane 14 is fixedly sleeved on the inner wall of the main clamping sleeve 13. An adaptive plug 24 is threadedly connected to the inner wall of the threaded protrusion 19, and the outer edge of the adaptive plug 24 is in close contact with the inner wall of the tympanic membrane 14. The tympanic membrane 14 is made of "nitrile rubber + aramid fiber composite material". The aramid fiber can enhance the tear resistance of the tympanic membrane 14 and reduce elastic fatigue (after 50 repeated deformations, the elastic recovery rate is still ≥90%). The edge design of the tympanic membrane 14 is... To achieve a "rounded transition" and avoid stress concentration caused by high-frequency deformation, thus extending service life, the adaptive occluder 24 uses an internal metal frame with an externally reusable expansion sleeve. Only the "outer expansion sleeve" needs to be replaced. The sleeve is fixed to the frame via a "clip-on connection." After recycling, the old sleeve is removed and replaced with a new one (time ≤ 5 minutes), and the cost is only 1 / 10 of replacing the entire occluder. The sleeve uses "self-healing rubber" (with added nano-silica particles), which can self-repair minor scratches under pressure, reducing the frequency of replacement.

[0023] In a preferred embodiment, a pressure sensor 20 is fixedly mounted on the inner wall of the main clamping cylinder 13 near the bottom, a permanent magnet marker 21 is fixedly mounted on the inner wall of the main clamping cylinder 13, and a miniature magnetic sensor is fixedly mounted on the inner wall of the adaptive occluder 24. The miniature magnetic sensor is electrically connected to the permanent magnet marker 21. Through the cooperative use of the permanent magnet marker 21 and the miniature magnetic sensor, the permanent magnet marker 21 and the miniature magnetic sensor are the core collaborative components for achieving "precise positioning of the adaptive occluder 24". The two work together to form a "non-contact position recognition system", which directly solves the key problem of "interference of the positioning signal by the threaded protrusion 19 and difficulty in accurately stopping the adaptive occluder 24 on the same horizontal plane as the diaphragm 14", and provides precise position guarantee for "clamping and limiting of the diaphragm 14" and "inter-segment sealing and isolation" in multi-segment fracturing.

[0024] In a preferred embodiment, a slot 29 is formed on the inner wall of the sleeve 2 near the bottom. The bottom of the inner wall of the slot 29 is rotatably connected to the bottom of the propeller blade 9. A filter screen 10 is fixedly sleeved on the inner wall of the sleeve 2 near the bottom, and a solenoid valve air inlet pipe 11 is fixedly mounted on the side of the filter screen 10. The inner wall of the sleeve 2 is connected to the inner wall of the slot 29 through the inner wall of the filter screen 10 and the inner wall of the solenoid valve air inlet pipe 11. Through the cooperation of the filter screen 10 and the solenoid valve air inlet pipe 11, the filter screen 10 is used to filter debris inside the device. To aid in interception, filter screen 10 adopts a composite structure of "double-layer stainless steel woven mesh + intermediate porous support layer". The outer woven mesh has a pore size of 80-100 mesh (intercepting proppant and coal slime particles ≥0.15mm in fracturing fluid to avoid internal blockage); the intermediate support layer is a stainless steel porous plate with a thickness of 1-2mm (pore size of 3-5mm), which not only enhances the overall structural strength but also provides a preliminary guide channel for gas; the inner woven mesh has a pore size of 120-150 mesh (secondary filtration of fine impurities to ensure that the gas entering the gas passage is free from particulate contamination).

[0025] In a preferred embodiment, an electric telescopic rod 8 is fixedly mounted on the inner wall of the slot 29, and a friction clamping plate 7 is fixedly mounted on the side of the electric telescopic rod 8. The shape and size of the inner wall of the friction clamping plate 7 are adapted to the shape and size of the outer edge of the propulsion blade 9. An angle sensor is fixedly mounted on the inner wall of the sleeve 2 near the top, and the angle sensor is electrically connected to the electric telescopic rod 8. The angle sensor can monitor the rotation angle of the cylinder 4 in real time. The refresh rate of the angle sensor is increased to 20Hz. If an angle deviation ≥0.5° is detected, a signal is immediately sent. Through the cooperation of the electric telescopic rod 8 and the friction clamping plate 7, the electric telescopic rod 8 drives the friction clamping plate 7 to move, thereby using the friction clamping plate 7 to clamp and limit the propulsion blade 9, and then using the propulsion blade 9 to assist the cylinder 4 in limiting its position.

[0026] In a preferred embodiment, a solenoid valve connecting pipe 3 is fixedly sleeved on the inner wall of the sleeve 2 near the top. A connecting groove 17 is formed at the top of the cylinder 4, and a connecting groove 16 is formed at the bottom of the cylinder 4. A communicating groove 12 is formed at the bottom of the sleeve 2. A solenoid valve main clamping pipe 15 is fixedly sleeved on the inner wall of the communicating groove 12, and the inner wall of the solenoid valve main clamping pipe 15 communicates with the inner wall of the main clamping cylinder 13. The inner wall of the slot 29 passes through the inner walls of the connecting groove 16, the annular groove 25, and the connecting groove 17, and connects to the inner wall of the sleeve 2 near the top. The inner walls of the parts are connected, and the solenoid valve main clamping tube 15 is electrically connected to the pressure sensor 20. Through the cooperation of the solenoid valve main clamping tube 15 and the pressure sensor 20, the solenoid valve main clamping tube 15 supplies air to the inside of the main clamping cylinder 13, thereby pushing the diaphragm 14 to deform in the inner wall of the main clamping cylinder 13. Then, the diaphragm 14 is used to assist in clamping and limiting the adaptive plugger 24, and the pressure sensor 20 is used to assist in detecting the pressure inside the main clamping cylinder 13, thereby closing the solenoid valve main clamping tube 15, and thus assisting the diaphragm 14 in limiting its position.

[0027] In a preferred embodiment, the top of the cylinder 4 is provided with a connecting groove 3 18 and two connecting grooves 2 16. The inner wall of the connecting groove 3 18 is connected to the inner wall of the sleeve 2 near the bottom through the inner wall of the arc groove 30 and the inner wall of the connecting groove 2 16 away from the connecting groove 17. By opening the connecting groove 3 18, the gas can be stably discharged to the inner wall of the sleeve 2 near the top and continuously discharged to the top, thereby avoiding gas stagnation and ensuring stable gas discharge.

[0028] In a preferred embodiment, a solenoid valve main exhaust pipe 27 is fixedly sleeved on the inner wall of the exhaust pipe 31 near the top. A top clamping cylinder 28 is fixedly mounted on the bottom of the exhaust pipe 31, and a secondary clamping cylinder 22 is fixedly mounted on the top of the sleeve 2. A solenoid valve secondary clamping pipe 23 is fixedly sleeved on the top of the inner wall of the secondary clamping cylinder 22. There are four secondary clamping cylinders 22, and the connection structure at the top of the four secondary clamping cylinders 22 is completely consistent with the connection structure at the top of the main clamping cylinder 13. Through the cooperation of the top clamping cylinder 28 and the secondary clamping cylinder 22, the height of the adaptive plug 24 is adjusted. The diaphragm 14 in the inner wall of the top clamping cylinder 28 and the secondary clamping cylinder 22 clamps and limits the adaptive plug 24, thereby ensuring the stable limiting of the adaptive plug 24.

[0029] In a preferred embodiment, there are five threaded protrusions 19, which are arranged vertically in an array on the inner wall of the fracturing tube body 1. The distance between the five threaded protrusions 19 is a, the height of the diaphragm 14 is b, and b = a, and the height of the adaptive plug 24 is c, and c > b. When the center of the adaptive plug 24 is at the same height as the center of the diaphragm 14, the inner wall of the adaptive plug 24 near the top and near the bottom are threadedly connected to the threaded protrusions 19 near the top and near the bottom of the diaphragm 14, respectively. The bottom of the main clamping cylinder 13 is fixedly equipped with a base 26, and the shape and size of the inner wall of the base 26 near the bottom are adapted to the shape and size of the outer edge of the adaptive plug 24. The threaded protrusions 19 adopt a "short-distance disconnection", and the stability of the water flow spiral is only slightly reduced, which does not affect the cleaning and gas extrusion functions.

[0030] In a preferred embodiment, the inner wall of the cylinder 4 is provided with five nozzles 5, and the five nozzles 5 and the arc-shaped plate 6 are evenly distributed in the inner wall of the annular groove 25. The five nozzles 5 have different orientations at the ends away from the inner wall of the cylinder 4. By adding the five nozzles 5, the five nozzles 5 have different orientations, thereby ensuring that the cylinder 4 drives the five nozzles 5 to rotate, and assists the nozzles 5 with the required orientation to connect with the solenoid valve inlet pipe 32, thereby ensuring that the fracturing fluid is stably discharged to the outside through the solenoid valve inlet pipe 32 and the nozzles 5 with the required orientation.

[0031] Working principle: Fracturing fluid is supplied from the top of the fracturing tube body 1. The fracturing fluid flows along the threads of the threaded protrusions 19. The fracturing fluid guided by the threaded protrusions 19 maintains stability due to the velocity gradient between the flow along the wall and the weak flow in the center. This assists in flushing the inside of the fracturing tube body 1 and compressing the gas inside the fracturing tube body 1. The gas compressed by the fracturing fluid passes through the filter screen 10 and the solenoid valve air inlet pipe 11 to supply gas into the slot 29. This gas drives the propeller blade 9 to rotate the cylinder 4, which in turn drives the five nozzles 5 to rotate. An angle sensor assists in detecting the required angle of the nozzle 5 and aligning it with the solenoid valve inlet pipe 32. The electric telescopic rod 8 controls the friction clamping plate 7 to clamp and limit the propeller blade 9, thus ensuring stable alignment between the required nozzle 5 and the solenoid valve inlet pipe 32. When the gas reaches the inside of the slot 29, it is supplied to the inside of the main clamping cylinder 13 through the solenoid valve main clamping pipe 15, thereby assisting in the deformation of the diaphragm 14. The adaptive plug 24 assists in sealing the internal structure of the device, and the pressure sensor 20 monitors the internal pressure of the main clamping cylinder 13. The pressure sensor 20 then controls the main clamping pipe 15 of the solenoid valve to close, ensuring stable upward gas discharge until the gas is discharged to the outside through the main exhaust pipe 27 of the solenoid valve. This achieves automated adjustment of the nozzle 5 and full utilization and discharge of gas. After the fracturing fluid near the bottom is supplied to the outside, the main clamping pipe 15 of the solenoid valve is opened to assist the diaphragm 14 in resetting. Then, the external connection structure is reconnected to the adaptive plug 24, causing the adaptive plug 24 to rotate upward until it moves to the same horizontal position as the bottom diaphragm 14 at the fracturing point. Then, fracturing fluid is supplied again to assist the adaptive plug 24 in limiting its position, thereby improving the operating efficiency of the device. When the adaptive plug 24 moves upward away from the inside of the device, it helps to expel impurities from the device.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment, comprising a fracturing tube body (1), characterized in that: An exhaust pipe (31) is fixedly sleeved on the outer edge of the fracturing tube body (1). A sleeve (2) is provided at the bottom of the fracturing tube body (1). A cylinder (4) is rotatably sleeved on the outer edge of the sleeve (2). A nozzle (5) is fixedly sleeved on the inner wall of the cylinder (4). An annular groove (25) is opened on the inner wall of the cylinder (4). An arc plate (6) is fixedly sleeved on the inner wall of the annular groove (25). An arc groove (30) is opened on the inner wall of the arc plate (6). A solenoid valve inlet pipe (32) is fixedly sleeved on the inner wall of the sleeve (2). The inner wall of the solenoid valve inlet pipe (32) is connected to the inner wall of the nozzle (5). A propulsion blade (9) is fixedly assembled at the bottom of the cylinder (4). A threaded protrusion (19) is fixedly sleeved on the inner wall of the fracturing tube body (1).

2. The directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 1, characterized in that: The bottom of the sleeve (2) is fixedly fitted with a main clamping cylinder (13), and the inner wall of the main clamping cylinder (13) is fixedly sleeved with a diaphragm (14). The inner wall of the threaded protrusion (19) is threadedly connected with an adaptive plug (24), and the outer edge of the adaptive plug (24) is in close contact with the inner wall of the diaphragm (14).

3. The directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 2, characterized in that: A pressure sensor (20) is fixedly mounted on the inner wall near the bottom of the main clamping cylinder (13), a permanent magnet mark (21) is fixedly mounted on the inner wall of the main clamping cylinder (13), and a miniature magnetic sensor is fixedly mounted on the inner wall of the adaptive plug (24), and the miniature magnetic sensor is electrically connected to the permanent magnet mark (21).

4. The directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 3, characterized in that: The inner wall of the sleeve (2) near the bottom is provided with a slot (29). The bottom of the inner wall of the slot (29) is rotatably connected to the bottom of the propeller (9). A filter screen (10) is fixedly sleeved on the inner wall of the sleeve (2) near the bottom, and a solenoid valve air inlet pipe (11) is fixedly assembled on the side of the filter screen (10). The inner wall of the sleeve (2) is connected to the inner wall of the slot (29) through the inner wall of the filter screen (10) and the inner wall of the solenoid valve air inlet pipe (11).

5. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 4, characterized in that: An electric telescopic rod (8) is fixedly mounted on the inner wall of the slot (29). A friction clamping plate (7) is fixedly mounted on the side of the electric telescopic rod (8). The shape and size of the inner wall of the friction clamping plate (7) are adapted to the shape and size of the outer edge of the propulsion blade (9). An angle sensor is fixedly mounted on the inner wall of the sleeve (2) near the top. The angle sensor is electrically connected to the electric telescopic rod (8).

6. The directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 4, characterized in that: The inner wall of the sleeve (2) near the top is fixedly fitted with a solenoid valve connecting pipe (3). The top of the cylinder (4) is provided with a connecting groove one (17). The bottom of the cylinder (4) is provided with a connecting groove two (16). The bottom of the sleeve (2) is provided with a connecting groove (12). The inner wall of the connecting groove (12) is fixedly fitted with a solenoid valve main clamping pipe (15). The inner wall of the solenoid valve main clamping pipe (15) is connected to the inner wall of the main clamping cylinder (13). The inner wall of the slot (29) is connected to the inner wall of the sleeve (2) near the top through the inner wall of the connecting groove two (16), the inner wall of the annular groove (25), and the inner wall of the connecting groove one (17). The solenoid valve main clamping pipe (15) is electrically connected to the pressure sensor (20).

7. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 6, characterized in that: The top of the cylinder (4) is provided with a connecting groove three (18), and there are two connecting grooves two (16). The inner wall of the connecting groove three (18) is connected to the inner wall of the sleeve (2) near the bottom through the inner wall of the arc groove (30) and the inner wall of the connecting groove two (16) away from the connecting groove one (17).

8. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 1, characterized in that: The main exhaust pipe (27) of the solenoid valve is fixedly sleeved on the inner wall near the top of the exhaust pipe (31). The bottom of the exhaust pipe (31) is fixedly fitted with a top clamping cylinder (28). The top of the sleeve (2) is fixedly fitted with a secondary clamping cylinder (22). The top of the inner wall of the secondary clamping cylinder (22) is fixedly sleeved with a secondary clamping pipe (23) of the solenoid valve. There are four secondary clamping cylinders (22), and the connection structure at the top of the four secondary clamping cylinders (22) is completely consistent with the connection structure at the top of the main clamping cylinder (13).

9. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 2, characterized in that: The number of the five threaded protrusions (19) is five, and the five threaded protrusions (19) are arranged in a vertical array in the inner wall of the rupture tube body (1). The distance between the five threaded protrusions (19) is a, the height of the tympanic membrane (14) is b, and b = a, the height of the adaptive occluder (24) is c, and c > b. When the center of the adaptive occluder (24) is at the same height as the center of the tympanic membrane (14), the inner wall of the adaptive occluder (24) near the top and the inner wall of the adaptive occluder (24) near the bottom are threadedly connected to the threaded protrusions (19) near the top and the threaded protrusions (19) near the bottom of the tympanic membrane (14), respectively. The bottom of the main clamping cylinder (13) is fixedly equipped with a base (26), and the shape and size of the inner wall of the base (26) near the bottom are adapted to the shape and size of the outer edge of the adaptive occluder (24).

10. A directional hydraulic fracturing device for downhole hydraulic fracturing equipment according to claim 1, characterized in that: The inner wall of the cylinder (4) is provided with five nozzles (5), and the five nozzles (5) and the arc plate (6) are evenly distributed in the inner wall of the annular groove (25). The orientation of the five nozzles (5) away from the inner wall of the cylinder (4) is not the same.

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