A sand pumping device with large flow and negative pressure

Abstract

This invention relates to the field of oil and gas field development equipment technology, and discloses a high-flow-rate negative pressure sand-carrying and drainage device that combines efficiency enhancement. It includes an upper connector and an outer casing. One end of the upper connector is fixedly connected to one end of the outer casing. An integrated sleeve is installed inside the outer casing. One end of the integrated sleeve is fixedly connected to a porous pump core seat. A mixing and diffusion component is installed inside the integrated sleeve. A pump core component is installed inside the porous pump core seat. A flow-diverting sleeve connects the pump core component and the mixing and diffusion component. Flow channels are provided between the integrated sleeve and the outer casing, and between the porous pump core seat and the outer casing. This invention adopts a multi-pump core circumferentially distributed and dual-path flow structure for the power fluid. One path achieves wellbore cleaning and sand agitation, while the other path forms Venturi negative pressure through a negative pressure nozzle and throat, realizing integrated negative pressure sand suction, mixing and pressurization, and high-flow-rate drainage, significantly improving sand-carrying and drainage efficiency and fluid transport capacity.

Description

Technical Field

[0001] This invention belongs to the technical field of oil and gas field development equipment, specifically relating to a high-flow-rate negative pressure sand-carrying and drainage negative pressure device that combines efficiency enhancement. Background Technology

[0002] Negative pressure jetting, as a fluid transport technology without moving parts, is widely used in many industrial fields due to its advantages such as simple structure, low maintenance cost, and strong adaptability. Its core working principle is as follows: high-pressure working fluid is accelerated by the nozzle to form a high-speed jet, which generates a low-pressure zone in the throat area, entraining the fluid or solid particles to be transported. After the two are fully mixed in the throat, the kinetic energy is converted into pressure energy through the diffuser, ultimately realizing the transport or mixing of fluid.

[0003] Traditional single-nozzle jet pumps have a limited low-pressure range and insufficient entrainment capacity, resulting in low suction efficiency and greatly limiting their application scenarios. On the other hand, when attempting to increase the flow rate by increasing the number of nozzles, the existing structure is prone to mutual interference of the flow field, exacerbating turbulent impacts and energy loss, which in turn leads to a decrease in overall efficiency. Some technologies only achieve external parallel connection of multiple independent jet pumps, requiring multiple sets of drive systems, resulting in high equipment investment costs and cumbersome structures. Another design with an internal dual-jet structure forms two flow channels separated by a single inner wall, but the mixing begins at the throat inlet section, and the flow field interference problem is not fundamentally solved. Moreover, it can only achieve parallel connection of two cores, with poor capacity expansion. At the same time, the existing jet pump core structure is complex, prone to clogging, and inconvenient to maintain, further restricting the stability and economy of its application. Summary of the Invention

[0004] This invention provides a high-flow-rate, negative-pressure sand extraction device that combines suction and drainage, solving the technical problems of low suction efficiency, severe flow field interference, and high maintenance costs of jet pumps in related technologies.

[0005] This invention provides a high-flow-rate negative pressure sand extraction device that combines and enhances efficiency, including an upper connector and an outer sleeve. One end of the upper connector is fixedly connected to one end of the outer sleeve. An integrated sleeve is provided inside the outer sleeve. One end of the integrated sleeve is fixedly connected to a porous pump core seat. A mixing and diffusion component is provided inside the integrated sleeve. A pump core component is provided inside the porous pump core seat. A flow-diverting sleeve connects the pump core component and the mixing and diffusion component. Flow channels are provided between the integrated sleeve and the outer sleeve, and between the porous pump core seat and the outer sleeve. The pump core assembly includes multiple pump cores, which are evenly distributed circumferentially along the central axis of the porous pump core seat. A negative pressure nozzle is fixedly installed at one end of the pump core. The negative pressure nozzle is sealed and connected to the flow divider sleeve. One end of the flow divider sleeve is connected to the pump core, and the other end of the flow divider sleeve is provided with a throat. One end of the porous pump core seat is fixedly connected to a suction section. A deblocking mechanism is fitted on the outer wall of the suction section. Flow channels are provided inside the porous pump core seat, inside the flow divider sleeve, and inside the pump core. The flow channels inside the porous pump core seat are divided into two groups. One group of flow channels is arranged radially along the porous pump core seat tube and is evenly distributed along the circumference of the porous pump core seat. The other group of flow channels is arranged axially along the porous pump core seat tube and the two groups of flow channels are spaced apart. The radially arranged flow channels are connected to the flow channel and the pump core.

[0006] In a preferred embodiment, a conversion short section is fixedly connected to the other end of the integral sleeve, and a diffuser tube is fixedly installed inside the integral sleeve, with the diffuser tube and the throat tube in a sealed communication.

[0007] In a preferred embodiment, the suction section is rotatably provided with a water outlet pipe, and a gap is left between the water outlet pipe and the suction section. One end of the water outlet pipe is rotatably connected to the inside of the porous pump core seat, and the water outlet pipe is connected to the pump core through the porous pump core seat. The other end of the suction section is connected to a rotating base.

[0008] In a preferred embodiment, a rotating head is rotatably mounted on one end of the rotating base, a ball is provided at the junction of the inner side of the rotating base and the rotating head, a ball plug is provided at the edge of the ball, the ball plug is threaded on the rotating base, a rotating nozzle is threadedly connected to the inside of the rotating head, the rotating nozzle is arranged along the circumference of the rotating head, and a cavitation nozzle is threadedly connected to the end of the rotating head.

[0009] In a preferred embodiment, a transmission pipe is provided on the inner wall of the rotating head, and the transmission pipe is fixedly connected to the water outlet pipe. Multiple limiting blocks are provided on the outer wall of the water outlet pipe, and an X-shaped guide groove is formed between two adjacent limiting blocks. An annular groove is provided between the ends of the X-shaped guide grooves at both ends of the water outlet pipe.

[0010] In a preferred embodiment, the unblocking mechanism includes a movable ring sleeved on the outside of the suction subsection, and a transmission rod fixedly connected to the inner side of the movable ring. The transmission rod is arranged radially along the outlet pipe and passes through the suction subsection.

[0011] In a preferred embodiment, the tube body of the suction section is provided with screen slots, which are evenly distributed along the circumference of the suction section. Both ends of the screen slots are provided with inclined portions, and a strip-shaped hole is provided at the junction of the suction section and the transmission rod.

[0012] In a preferred embodiment, a mounting connecting plate is rotatably mounted on the end of the transmission rod. The mounting connecting plate is located between the suction section and the outlet pipe. Both ends of the mounting connecting plate are provided with bent portions facing the outlet pipe, and a connecting rod is provided on the side of the bent portion of the mounting connecting plate facing the outlet pipe. The connecting rod is located inside the X-shaped guide groove.

[0013] In a preferred embodiment, the outer edge of the movable ring is provided with extension pieces at equal intervals, and a cleaning plate is rotatably installed between the inner sides of two adjacent extension pieces. Each cleaning plate is aligned with a screen slot, and the lower surface of the end of the cleaning plate is provided with an inclined surface.

[0014] In a preferred embodiment, a connecting rod is rotatably connected to the upper surface of the cleaning plate. One end of the connecting rod is slidably connected to the inside of the extension piece. A strip groove is provided at the junction of the extension piece and the connecting rod. A guide rod is fixedly installed on the inner wall of the strip groove. The guide rod is slidably connected to the connecting rod, and a spring is sleeved on the outer wall of the guide rod. The spring is fixedly connected to the connecting rod.

[0015] The beneficial effects of this invention are as follows: 1. This invention adopts a multi-pump core circumferentially distributed and a dual-path flow structure for the power fluid. One path achieves well wall cleaning and sand agitation, while the other path forms a Venturi negative pressure through a negative pressure nozzle and throat, realizing the integration of negative pressure sand suction, mixed pressurization, and high-flow discharge, which greatly improves the efficiency of sand-carrying and discharge and the fluid transport capacity. Furthermore, the flow channel on the porous pump core seat determines the flow path of the liquid, so that the power fluid and the suction fluid do not interfere with each other.

[0016] 2. This invention uses an X-shaped guide groove and a movable ring to form a reciprocating unblocking mechanism, which can automatically remove blockages on the outer wall of the suction section, prevent sand accumulation, and ensure stable suction flow. At the same time, a retractable and flip-up cleaning plate is set on the movable ring, which can automatically insert and clean the sand and gravel in the screen gap, while avoiding the sand particles being pressed into the screen gap and causing secondary blockage. This fundamentally solves the problem of easy blockage in the suction channel and ensures long-term, efficient, and stable operation of the device with a large flow rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0018] Figure 2 This is a schematic diagram showing the disassembled structure of the upper connector, integrated sleeve, and rotating base of the present invention.

[0019] Figure 3 This is a schematic diagram showing the disassembled structure of the porous pump core holder, pump core, suction section, and outlet pipe of the present invention.

[0020] Figure 4 This is a schematic diagram of the internal planar structure of the present invention.

[0021] Figure 5 This is the present invention. Figure 4 Enlarged structural diagram of part A.

[0022] Figure 6 This is a schematic diagram of the internal structure of the porous pump core holder of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the inhalation section, water outlet pipe, and rotating head of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the unblocking mechanism and the water outlet pipe of the present invention.

[0025] Figure 9 This is a schematic diagram of the planar structure of the movable ring, transmission rod, mounting connecting plate, and docking rod of the present invention.

[0026] Figure 10 This is a schematic diagram of the movable ring planar structure of the present invention.

[0027] Figure 11 This is the present invention. Figure 10 Enlarged structural diagram of section B.

[0028] In the diagram: 1. Upper connector; 2. Converter section; 3. Integrated sleeve; 4. Perforated pump core seat; 5. Outer sleeve; 6. Diffuser tube; 7. Throat tube; 8. Diverter sleeve; 9. Negative pressure nozzle; 10. Pump core; 11. Suction section; 12. Discharge pipe; 13. Rotating base; 14. Rotating head; 15. Ball plug; 16. Rotating nozzle; 17. Cavitation nozzle; 18. Ball; 19. Unblocking mechanism; 191. 192. Moving ring; 193. Extension piece; 194. Transmission rod; 195. Mounting connecting plate; 196. Connecting rod; 197. Cleaning plate; 198. Connecting rod; 199. Inclined surface; 190. Strip groove; 120. Guide rod; 121. Spring; 20. Flow channel; 21. Limiting block; 22. Transmission tube; 23. Strip hole; 24. Screen gap; 25. Inclined part; 26. X-shaped guide groove; 27. Annular groove. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Example 1 like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a high-flow-rate negative pressure sand extraction and drainage device with combined efficiency enhancement includes an upper connector 1 and an outer sleeve 5. One end of the upper connector 1 is fixedly connected to one end of the outer sleeve 5. An integral sleeve 3 is provided inside the outer sleeve 5. A porous pump core seat 4 is fixedly connected to one end of the integral sleeve 3. A mixing and diffusion component is provided inside the integral sleeve 3. A pump core component is provided inside the porous pump core seat 4. A flow divider sleeve 8 is connected between the pump core component and the mixing and diffusion component. Flow channels are provided between the integral sleeve 3 and the outer sleeve 5, and between the porous pump core seat 4 and the outer sleeve 5. The pump core assembly includes multiple pump cores 10, which are evenly distributed circumferentially along the central axis of the porous pump core seat 4. A negative pressure nozzle 9 is fixedly installed at one end of the pump core 10. The negative pressure nozzle 9 is sealed and connected to the flow divider sleeve 8. One end of the flow divider sleeve 8 is connected to the pump core 10, and a throat 7 is provided at the other end of the flow divider sleeve 8. One end of the porous pump core seat 4 is fixedly connected to a suction section 11. A deblocking mechanism 19 is sleeved on the outer wall of the suction section 11. Flow channels 20 are provided inside the porous pump core seat 4, the flow divider sleeve 8, and the pump core 10. The flow channels 20 inside the porous pump core seat 4 are divided into two groups. One group of flow channels 20 is arranged radially along the tube body of the porous pump core seat 4 and is evenly distributed along the circumference of the porous pump core seat 4. The other group of flow channels 20 is arranged axially along the tube body of the porous pump core seat 4, and the two groups of flow channels 20 are spaced apart. The radially arranged flow channels 20 are connected to the flow channel and the pump core 10.

[0031] It should be noted that the porous pump core seat 4 is an integral sealed structure made of hard alloy. A power fluid flow channel is opened in the middle of the end near the suction section 11. An insertion hole is opened inside the porous pump core seat 4, and the pump core 10 is inserted into the insertion hole. The number of radially arranged flow channels 20 is the same as the number of power fluid flow channels. The axially arranged flow channels 20 are the flow channels for the suction fluid and do not interfere with the power fluid flow channels or the insertion hole of the pump core 10. According to actual needs, the number of flow channels 20 on the porous pump core seat 4 can be freely adjusted by changing the number of flow channels 20. For example, two flow channels 20 can be matched for small wells, and five flow channels 20 can be matched for large wells. They can be freely changed and matched. At the same time, a set of non-working pump core assembly and mixing diffusion assembly can be installed to adapt to the needs of controlling complex on-site conditions.

[0032] It should also be noted that the high-pressure power fluid from the ground passes through the upper connector 1, enters between the outer sleeve 5, the integrated sleeve 3, and the porous pump core seat 4, passes through the radially arranged flow channel 20 on the porous pump core seat 4, and enters the pump core 10 where it is split. A portion of the power fluid is ejected at high speed from one end of the pump core 10 to clean the well wall and agitate sediment. The other portion of the power fluid enters the negative pressure nozzle 9 at the other end of the pump core 10 and is also ejected at high speed from the negative pressure nozzle 9. The diameter of the throat 7 is smaller than the diameter of the splitting sleeve 8, resulting in high-speed... As the power fluid passes through the diversion sleeve 8 and enters the throat 7, it carries away the air around the diversion sleeve 8 through the circumferentially distributed flow channels 20 on the diversion sleeve 8, creating a negative pressure (Venturi effect - when fluid passes through a narrow pipe, the flow velocity increases and the pressure decreases). At the same time, the power fluid used to clean the well wall is ejected and enters the porous pump core seat 4 from the suction section 11. It passes through the flow channels 20 axially set on the pipe body of the porous pump core seat 4, reaches the diversion sleeve 8 and is sucked in. This is the sucked-in fluid.

[0033] The other end of the integrated sleeve 3 is fixedly connected to the conversion short section 2, and the diffuser tube 6 is fixedly installed inside the integrated sleeve 3. The diffuser tube 6 is sealed and connected to the throat tube 7.

[0034] It should be noted that the diameter of the diffuser 6 is larger than that of the throat 7. The suction liquid and the kinetic liquid ejected by the negative pressure nozzle 9 are highly mixed and undergo momentum exchange within the throat 7 before entering the diffuser 6, where the flow velocity decreases. At this point, kinetic energy is converted into pressure energy. The conversion section 2 is used to transport the mixed liquid back to the ground. Furthermore, the negative pressure nozzle 9, throat 7, flow divider sleeve 8, and diffuser 6 constitute multiple completely independent negative pressure jet units. Each jet unit has its own independent flow channel, fundamentally avoiding the problems of "flow competition" and flow field interference, and enabling simultaneous... When in operation, the negative pressure nozzle 9 simultaneously jets at high speed, which synergistically improves the vacuum degree and enhances the negative pressure stability, approaching absolute vacuum. Each negative pressure jet unit draws in a portion of fluid from its own inlet. After multiple portions of the drawn-in fluid are mixed with multiple portions of the working fluid, they converge at the pump outlet. The total suction flow rate is the sum of the suction flow rates of multiple independent units, which significantly increases the suction flow rate. When the working capacity of a single negative pressure nozzle 9 or throat 7 is affected by wear or blockage, other units can usually continue to work, providing a certain degree of system redundancy.

[0035] Example 2 like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, an outlet pipe 12 is rotatably installed inside the suction section 11, with a gap between the outlet pipe 12 and the suction section 11. One end of the outlet pipe 12 is rotatably connected to the inside of the porous pump core seat 4, and the outlet pipe 12 is connected to the pump core 10 through the porous pump core seat 4. The other end of the suction section 11 is connected to a rotating base 13. A rotating head 14 is rotatably installed at one end of the rotating base 13. A ball bearing 18 is provided at the junction of the inner side of the rotating base 13 and the rotating head 14. A ball screw plug 15 is provided at the edge of the ball bearing 18. The ball screw plug 15 is threadedly installed on the rotating base 13. A rotating nozzle 16 is threadedly connected inside the rotating head 14. The rotating nozzle 16 is arranged along the circumference of the rotating head 14. A cavitation nozzle 17 is threadedly connected to the end of the rotating head 14.

[0036] It should be noted that the rotating base 13 and the rotating head 14 are fixed by balls 18, which are made of high-strength bearing steel. The balls 18 are limited by ball plugs 15 to form a double-row ball bearing structure. This double-row array structure makes it less prone to deformation and also minimizes friction and resistance during rotation of the rotating head 14. The rotating head 14 has an off-axis structure. When the power fluid passes through the rotating nozzle 16, due to the off-path, torque is generated during its flow, causing the rotating head 14 to rotate. The cavitation nozzle 17 at the end of the rotating head 14 has a Venturi structure. When the power fluid passes through the cavitation nozzle 17, it undergoes violent cavitation inside the wellbore. The shear cavitation occurs when a large number of cavitation bubbles collide with the outer and inner walls of the suction section 11, resulting in a high degree of cleaning of both the inner and outer sides of the suction section 11. Shear cavitation can occur simultaneously with sand lifting, cleaning sludge and scale from the pipe wall in 360°. The pump body occupies little space, solving the problem of bulky size and inability to adapt to narrow spaces under the large displacement requirements of traditional single-core pumps. Furthermore, the parallel arrangement design results in a smaller size for the same displacement requirement. The compact structure can be smoothly adapted to the complex well conditions of directional wells and horizontal wells in oil extraction, while also meeting the space-constrained installation requirements in mining, metallurgy, and chemical transportation scenarios, greatly expanding the application boundaries.

[0037] Example 3 like Figure 3 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the power fluid after cleaning the well wall contains a large amount of sand or gravel. During the suction process, it will accumulate on the outer wall of the suction sub 11. Because these materials are large and hard, when they get stuck on the suction sub 11, the cavitation bubbles ejected by the cavitation nozzle 17 cannot break them apart by the impact force when they collapse, thus causing the suction sub 11 to be blocked. In order to prevent the suction sub 11 from being blocked and to ensure that the flow rate is not affected, this application further provides the following technical solution.

[0038] A transmission pipe 22 is provided on the inner wall of the rotating head 14. The transmission pipe 22 is fixedly connected to the water outlet pipe 12. Multiple limiting blocks 21 are provided on the outer wall of the water outlet pipe 12. An X-shaped guide groove 26 is formed between two adjacent limiting blocks 21. An annular groove 27 is provided between the ends of the X-shaped guide grooves 26 at both ends of the water outlet pipe 12. The unblocking mechanism 19 includes a movable ring 191, which is sleeved on the outside of the suction section 11. A transmission rod 193 is fixedly connected to the inner side of the movable ring 191. The transmission rod 193 is arranged radially along the water outlet pipe 12 and passes through the suction section 11. The tube body of 1 has a screen slit 24, which is evenly distributed along the circumference of the suction section 11. Both ends of the screen slit 24 are provided with inclined portions 25. A strip hole 23 is provided at the junction of the suction section 11 and the transmission rod 193. The end of the transmission rod 193 is rotatably mounted with a mounting connecting plate 194. The mounting connecting plate 194 is located between the suction section 11 and the outlet pipe 12. Both ends of the mounting connecting plate 194 are provided with bent portions facing the outlet pipe 12. A connecting rod 195 is provided on the side of the bent portion of the mounting connecting plate 194 facing the outlet pipe 12. The connecting rod 195 is located inside the X-shaped guide groove 26.

[0039] It should be noted that the X-shaped guide groove 26 and the limiting block 21 form two sets of spiral grooves with opposite directions of rotation on the water outlet pipe 12, and the ends of the spiral grooves at both ends are connected by the annular groove 27 to form a spiral groove structure on the reciprocating screw. During the rotation of the water outlet pipe 12, it cooperates with the linear guidance of the strip hole 23 to make the movable ring 191 and the water outlet pipe 12 form a set of reciprocating screw structure. That is, controlling the rotation of the water outlet pipe 12 can make the movable ring 191 move back and forth.

[0040] It should also be noted that the sieve 24 on the suction section 11 is used for filtration to prevent sand or gravel from clogging the porous pump core seat 4. When the rotating head 14 rotates at high speed, it will drive the entire outlet pipe 12 through the transmission pipe 22. During the rotation of the outlet pipe 12, the upper limit block 21 on its outer wall will rotate synchronously. Since the connecting rod 195 is located inside the X-shaped guide groove 26, the mounting connecting plate 194 determines the position of the connecting rod 195, so that it can only stay in one of the grooves of the X-shaped guide groove 26. As the outlet pipe 12 continues to rotate, the X-shaped guide groove 26 will also rotate synchronously, thus forming a threaded transmission state. By utilizing the cooperation between the limit block 21 and the connecting rod 195, the entire mounting connecting plate 194 is driven to move along the outlet pipe 12 towards the rotating base 13. The mounting connecting plate 194 is driven by the transmission rod 193. The movable ring 191 pushes away the blockage on the outer wall of the suction section 11. After the connecting rod 195 moves into the annular groove 27, the connecting rod 195 disengages from its original groove and, with the rotation of the transmission pipe 22, enters another groove of the X-shaped guide groove 26. Due to the intersecting characteristics of the X-shaped guide groove 26, this groove is in the opposite direction to the groove where the connecting rod 195 initially stayed. Subsequently, as the outlet pipe 12 rotates, it continues to move along the outlet pipe 12 towards the porous pump core seat 4 through the cooperation between the limiting block 21 and the connecting rod 195. Through reciprocating movement, the movable ring 191 pushes away the blockage on the outer wall of the suction section 11, achieving the purpose of cleaning the surface of the suction section 11. The strip hole 23 on the suction section 11 is used to determine the movement path of the transmission rod 193.

[0041] Example 4 like Figure 9 , Figure 10 and Figure 11 As shown, when the movable ring 191 cleans the outer wall of the suction section 11, the size of some gravel or crushed stone may just match the size of the screen gap 24. During the movement of the movable ring 191, such gravel or crushed stone of just the right size can easily be pressed into the screen gap 24, which may still cause blockage. In order to prevent the movable ring 191 from pressing gravel or crushed stone into the screen gap 24 when cleaning the outer wall of the suction section 11, this application further provides the following technical solution.

[0042] Extended plates 192 are evenly spaced on the outer edge of the movable ring 191. A cleaning plate 196 is rotatably installed between the inner sides of two adjacent extended plates 192. Each cleaning plate 196 is aligned with a screen slot 24. An inclined surface 198 is provided on the lower surface of the end of the cleaning plate 196. A connecting rod 197 is rotatably connected to the upper surface of the cleaning plate 196. One end of the connecting rod 197 is slidably connected to the inside of the extended plate 192. A strip groove 199 is provided at the junction of the extended plate 192 and the connecting rod 197. A guide rod 120 is fixedly installed on the inner wall of the strip groove 199. The guide rod 120 is slidably connected to the connecting rod 197. A spring 121 is sleeved on the outer wall of the guide rod 120. The spring 121 is fixedly connected to the connecting rod 197.

[0043] It should be noted that during the movement of the movable ring 191, when the cleaning plate 196 moves to the screen gap 24, the elastic force of the spring 121 will pull one end of the connecting rod 197 downward along the guide rod 120, thereby pushing the cleaning plate 196 into the screen gap 24 through the connecting rod 197. As the movable ring 191 moves, the cleaning plate 196 can push out the sand or gravel stuck in the screen gap 24. When the cleaning plate 196 is driven by the movable ring 191 to the end of the screen gap 24, the inclined surface 198 of the lower surface of the cleaning plate 196 will meet the inclined surface of the end of the screen gap 24. The two inclined surfaces of part 25 make contact, thereby raising the cleaning plate 196. The cleaning plate 196 completely pushes out the sand or gravel in the screen gap 24. During the rotation of the cleaning plate 196, the end of the connecting rod 197 will still move along the guide rod 120. In this process, the spring 121 will also be stretched. The strip groove 199 is used to accommodate the guide rod 120 and the spring 121. When the end of the connecting rod 197 moves to the end of the strip groove 199, the cleaning plate 196 completely disengages from the screen gap 24 to avoid affecting the movement of the movable ring 191.

[0044] Working principle of the invention: The high-pressure power fluid supplied from the ground enters the device through the upper connector 1, flows down along the flow channel between the outer jacket 5, the integrated sleeve 3, and the porous pump core seat 4, and enters the multiple pump cores 10 that are evenly distributed circumferentially inside the porous pump core seat 4 through the radially arranged flow channel 20, and is split into two paths. One of the power fluids is ejected at high speed from one end of the pump core 10, passes through the porous pump core seat 4 and enters the water outlet pipe 12, and finally enters the offset rotary nozzle 16 circumferentially set in the rotary head 14. Since the rotary head 14 has an off-axis structure, the power fluid will generate torque on the rotary head 14 when it passes through the rotary nozzle 16, causing the rotary head 14 to rotate under the support of the rotary base 13 and the ball bearing 18. The power fluid ejected from the rotary nozzle 16 will directly act on the well wall to clean the well wall and agitate the sediment. Another path of power fluid enters the negative pressure nozzle 9 at the end of the pump core 10. After being ejected at high speed through the negative pressure nozzle 9, it enters the diverter sleeve 8 and flows to the throat 7. Since the diameter of the throat 7 is smaller than the diameter of the diverter sleeve 8, when the high-speed power fluid flows through the throat 7, based on the Venturi effect, it entrains the surrounding air jet through the circumferentially distributed flow channels on the diverter sleeve 8, forming a negative pressure in the area of ​​the diverter sleeve 8. After cleaning the well wall, the sand-laden kinetic fluid is drawn in through the suction sub 11, passes through the axially arranged flow channel 20 on the porous pump core seat 4 to reach the negative pressure area, and is drawn into the diversion sleeve 8 and throat 7 by negative pressure. It is fully mixed with the kinetic fluid sprayed by the negative pressure nozzle 9 in the throat 7 and completes momentum exchange. The mixture then enters the diffuser 6 which is sealed and connected to the throat 7. Because the diameter of the diffuser 6 is larger than the diameter of the throat 7, the flow rate of the mixture decreases, and the kinetic energy is converted into pressure energy to achieve pressurization. Finally, it is transported to the surface through the conversion sub 2 to complete the sand suction and discharge. The cavitation nozzle 17 at the end of the rotating head 14 adopts a venturi structure. When the power fluid passes through, it generates violent shear cavitation. The impact force generated by the collapse of the cavitation bubbles powerfully cleans the inner and outer walls of the suction section 11. The rotating head 14 drives the outlet pipe 12 to rotate synchronously through the transmission pipe 22. The X-shaped guide groove 26 on the outer wall of the outlet pipe 12 cooperates with the docking rod 195 to drive the mounting connecting plate 194, the transmission rod 193 and the movable ring 191 to move axially back and forth along the suction section 11. The movable ring 191 pushes open the blockages on the outer wall of the suction section 11 and the screen gap 24, thereby unblocking the outer wall of the suction section 11. During the movement of the movable ring 191, under the elastic action of the spring 121, the cleaning plate 196 is pushed into the screen gap 24 by pulling the connecting rod 197. As the movable ring 191 moves, the cleaning plate 196 can push out the sand and gravel stuck in the screen gap 24. When the cleaning plate 196 moves to the inclined part 25 at the end of the screen gap 24, the inclined surface 198 of its lower surface cooperates with the inclined part 25, so that the cleaning plate 196 automatically lifts up and exits the screen gap 24, avoiding pressing the sand and gravel into the screen gap 24 and ensuring that the device can operate stably with a large flow rate.

[0045] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A high-flow-rate, negative-pressure sand extraction device for combined efficiency enhancement, comprising an upper connector (1) and an outer casing (5), wherein one end of the upper connector (1) is fixedly connected to one end of the outer casing (5), characterized in that, An integral sleeve (3) is provided inside the outer sleeve (5). One end of the integral sleeve (3) is fixedly connected to a porous pump core seat (4). A mixing and diffusion component is provided inside the integral sleeve (3). A pump core component is provided inside the porous pump core seat (4). A flow divider sleeve (8) is connected between the pump core component and the mixing and diffusion component. Flow channels are provided between the integral sleeve (3) and the outer sleeve (5), and between the porous pump core seat (4) and the outer sleeve (5). The pump core assembly includes multiple pump cores (10), which are evenly distributed circumferentially along the central axis of the porous pump core seat (4). A negative pressure nozzle (9) is fixedly installed at one end of the pump core (10), and the negative pressure nozzle (9) is sealed and connected to the flow divider sleeve (8). One end of the flow divider sleeve (8) is connected to the pump core (10), and the other end of the flow divider sleeve (8) is provided with a throat tube (7). One end of the porous pump core seat (4) is fixedly connected to a suction short section (11). A deblocking mechanism (19) is sleeved on the outer wall of the suction short section (11). Flow channels (20) are opened inside the porous pump core seat (4), inside the flow divider sleeve (8), and inside the pump core (10). The flow channels (20) inside the porous pump core seat (4) are divided into two groups. One group of flow channels (20) is arranged radially along the tube body of the porous pump core seat (4) and is evenly distributed along the circumference of the porous pump core seat (4). The other group of flow channels (20) is arranged axially along the tube body of the porous pump core seat (4), and the two groups of flow channels (20) are spaced apart. The radially arranged flow channels (20) are connected to the flow channel and the pump core (10).

2. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 1, characterized in that, The other end of the integrated sleeve (3) is fixedly connected to a conversion short section (2), and a diffuser (6) is fixedly installed inside the integrated sleeve (3). The diffuser (6) is sealed and connected to the throat (7).

3. The high-flow-rate, high-efficiency sand extraction and drainage negative pressure device according to claim 1, characterized in that, The suction section (11) is rotatably equipped with a water outlet pipe (12), and there is a gap between the water outlet pipe (12) and the suction section (11). One end of the water outlet pipe (12) is rotatably connected to the inside of the porous pump core seat (4), and the water outlet pipe (12) is connected to the pump core (10) through the porous pump core seat (4). The other end of the suction section (11) is connected to a rotating base (13).

4. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 3, characterized in that, A rotating head (14) is rotatably mounted on one end of the rotating base (13). A ball (18) is provided at the junction of the inner side of the rotating base (13) and the rotating head (14). A ball plug (15) is provided at the edge of the ball (18). The ball plug (15) is threadedly mounted on the rotating base (13). A rotating nozzle (16) is threadedly connected to the inside of the rotating head (14). The rotating nozzle (16) is arranged along the circumference of the rotating head (14). A cavitation nozzle (17) is threadedly connected to the end of the rotating head (14).

5. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 4, characterized in that, The inner wall of the rotating head (14) is provided with a transmission pipe (22), which is fixedly connected to the water outlet pipe (12). Multiple limiting blocks (21) are provided on the outer wall of the water outlet pipe (12). An X-shaped guide groove (26) is formed between two adjacent limiting blocks (21). An annular groove (27) is provided between the ends of the X-shaped guide groove (26) at both ends of the water outlet pipe (12).

6. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 1, characterized in that, The unblocking mechanism (19) includes a movable ring (191), which is sleeved on the outside of the suction section (11). A transmission rod (193) is fixedly connected to the inside of the movable ring (191). The transmission rod (193) is arranged radially along the outlet pipe (12) and passes through the suction section (11).

7. The high-flow-rate, high-efficiency sand-carrying and drainage negative pressure device according to claim 6, characterized in that, The suction section (11) has a screen slit (24) on its tube body. The screen slit (24) is evenly distributed along the circumference of the suction section (11). Both ends of the screen slit (24) are provided with inclined parts (25). A strip hole (23) is provided at the junction of the suction section (11) and the transmission rod (193).

8. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 7, characterized in that, The end of the transmission rod (193) is rotatably mounted with a mounting connecting plate (194). The mounting connecting plate (194) is located between the suction section (11) and the outlet pipe (12). Both ends of the mounting connecting plate (194) are provided with bent portions facing the outlet pipe (12). A connecting rod (195) is provided on the side of the bent portion of the mounting connecting plate (194) facing the outlet pipe (12). The connecting rod (195) is located inside the X-shaped guide groove (26).

9. The high-flow-rate, high-efficiency sand-carrying and drainage negative pressure device according to claim 8, characterized in that, The outer edge of the movable ring (191) is provided with extension pieces (192) at equal intervals. A cleaning plate (196) is rotatably installed between the inner sides of two adjacent extension pieces (192). Each cleaning plate (196) is aligned with a sieve slot (24), and the lower surface of the end of the cleaning plate (196) is provided with an inclined surface (198).

10. The high-flow-rate, high-efficiency sand extraction negative pressure device according to claim 9, characterized in that, The upper surface of the cleaning plate (196) is rotatably connected to a connecting rod (197). One end of the connecting rod (197) is slidably connected to the inside of the extension piece (192). A strip groove (199) is provided at the junction of the extension piece (192) and the connecting rod (197). A guide rod (120) is fixedly installed on the inner wall of the strip groove (199). The guide rod (120) is slidably connected to the connecting rod (197), and a spring (121) is sleeved on the outer wall of the guide rod (120). The spring (121) is fixedly connected to the connecting rod (197).

Images