Multi-hole injection fracturing head for fracturing wellhead equipment and use method of multi-hole injection fracturing head

Abstract

The invention relates to the technical field of fracturing well mouths, and discloses a porous injection fracturing head for fracturing well mouth equipment and a using method thereof.The porous injection fracturing head comprises a fixing frame, a conveying pipe is fixedly connected to the bottom of the fixing frame, a containing groove is formed in the inner wall of the conveying pipe, and an external solution is conveyed into the conveying pipe through a water inlet pipe; when natural gas expands, water flow in the output pipe moves upwards along the output pipe under thrust and returns to the interior of the conveying pipe again, at the moment, backflow liquid makes contact with the first flow dividing block and the second flow dividing block again, the liquid is subjected to flow dividing under the influence of the first flow dividing block, the second flow dividing block and the appearance, and therefore the natural gas expands. According to the water pump, split water flows along the outer walls of the second arc-shaped grooves and the first arc-shaped grooves, when two different water flows interact, most impact force is offset, backflow water impacts each other in the conveying pipe, and when the water flows pass through the first split-flow blocks and the second split-flow blocks, the influence of the impact force on the water pump is effectively weakened.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing wellhead equipment, and specifically to a porous injection fracturing head for fracturing wellhead equipment and its usage method. Background Technique

[0002] In the oil field, fracturing refers to a method in the process of oil or gas production that uses hydraulic action to form fractures in the oil and gas reservoir, also known as hydraulic fracturing; a porous injection fracturing head is a device used in the oil and gas industry, mainly used to inject liquid into the formation during the fracturing process. Its design usually includes multiple holes, which can evenly distribute the fluid, thereby improving the fracturing effect. In this way, it can effectively create fractures, increase the fluidity of oil and gas, and improve the production efficiency. The advantage of the porous injection fracturing head is that it can optimize the fluid flow path, increase the injection rate, and reduce the damage to the wellbore. Ninety percent of the liquid transmitted by the fracturing head is water, and the remaining ten percent is various chemical substances.

[0003] Among them, when injecting liquid into the fracturing head through multiple water pumps and conducting pressure fracturing on the underground, if natural gas leaks at the bottom at this time, the high-pressure natural gas will push the liquid to flow back, and the flowing-back liquid will cause a great impact on the water pump, resulting in damage to the water pump. In response to the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a porous injection fracturing head for fracturing wellhead equipment, including a fixing frame. The bottom of the fixing frame is fixedly connected with a transmission pipe. A receiving groove is opened at the inner wall of the transmission pipe, an arc groove one is opened at the inner wall of the transmission pipe, an arc groove two is opened at the inner wall of the transmission pipe, and a water-blocking component is slidably connected to the inner wall of the transmission pipe; A limiting mechanism, the limiting mechanism includes an output pipe penetrating and connected to the bottom of the transmission pipe. A plurality of water inlet pipes are penetrating and connected to the side wall of the transmission pipe. Four flow dividing blocks one are fixedly connected to the inner wall of the transmission pipe, three flow dividing blocks two are fixedly connected to the inner wall of the transmission pipe. A reinforcing frame is fixedly connected to the outer wall of the transmission pipe. An insurance component is slidably connected to the inner wall of the output pipe. An enhancing component is rotatably connected to the inner wall of the flow dividing block one. Before use, install the fixing frame at the required position and ensure that multiple pipelines are connected to the water inlet pipes. At this time, the external solution is transmitted to the inside of the transmission pipe through the water inlet pipes. During this process, the water flow inside the transmission pipe will contact the outer walls of the flow dividing blocks one and two, and Figure 4It is transmitted along the route of G in the middle to complete the state of the device transporting water flow. Moreover, when the natural gas expands, the water flow inside the output pipe will move upward along the output pipe under the thrust and return to the inside of the transmission pipe again. At this time, the refluxed liquid will contact the shunt block one and the shunt block two again. Affected by the shunt block one, the shunt block two and the shape, the liquid will be shunted. The shunted water will flow along the outer walls of the arc-shaped groove two and the arc-shaped groove one and Figure 5 meet at points H and Y in the middle. When two different water flows interact, most of the impact force will be offset. Through the application of the above components, the refluxed water will collide with each other inside the transmission pipe. When the water flow passes through multiple shunt blocks one and shunt blocks two, the impact force on the water pump will be effectively weakened.

[0005] Preferably, the enhancement component includes a rotating plate rotatably connected to the inner wall of the shunt block one. A telescopic plate is slidably connected to the inner wall of the rotating plate. An arc-shaped spring is fixedly connected to the bottom of the rotating plate. One ends of the two telescopic plates away from the rotating plate are rotatably connected.

[0006] Preferably, the enhancement component further includes four circular pipes fixedly connected to the inner wall of the transmission pipe. Guide plates are rotatably connected to the outer walls of the four circular pipes. One end of the arc-shaped spring away from the rotating plate is fixedly connected to the inner wall of the shunt block one. When the liquid refluxes, the impact force will act on the planes of the shunt block one and the shunt block two. When the impact force acts on the plane of the shunt block one, it will push the telescopic plate and the rotating plate to fold inward. As the telescopic plate is compressed and folded, the plane of the shunt block one changes to a depression. When the refluxed water contacts the depressed telescopic plate, it forces the water flow to make a secondary change. The water flow with the changed flow direction will impact the remaining water flow and offset part of the impact force of the remaining water flow. Through the application of the above components, when reflux occurs, multiple transverse water flows can be increased to improve the water interception effect; in addition, when the water flow inside the transmission pipe flows along the G route, at this time, the pressure of the water flow mainly acts on the arc surfaces of the shunt block one and the shunt block two. At this time, the rotating plate is pushed by the arc-shaped spring and presents a flat state, so that when the device is flowing downstream, the influence of the shunt block one and the shunt block two on the water flow is reduced.

[0007] Preferably, the insurance component includes a first chute opened on the side wall of the output pipe. A sliding square pipe is slidably connected to the inner wall of the output pipe. A first limiting block is fixedly connected to the inner wall of the sliding square pipe. When water passes through the inside of the transmission pipe, a large impact force will be formed between the first shunt block and the second arc-shaped groove. When the water flow contacts the outer wall of the circular pipe, the water flow will be divided into two shunts after bypassing the circular pipe. Since the two shunts will never be completely symmetrical up and down at any time, during the operation of the equipment, the pressure on one side will be high and the pressure on the other side will be low. The side with high pressure will move towards the side with low pressure, eventually causing the water flow to swing irregularly. The force of this swing will drive the guide plate to swing synchronously. During the swinging process of the guide plate, the sand and stones inside the second arc-shaped groove will be pushed. Through the application of the above components, it is avoided that the fine sand in the liquid precipitates inside the transmission pipe due to the influence of the first arc-shaped groove and the second arc-shaped groove, causing sediment to block the transmission pipe and affecting the imbalance of the internal components of the liquid.

[0008] Preferably, the insurance component further includes a rotating column rotatably connected to the inner wall of the sliding square pipe. A water-blocking block is fixedly connected to the side wall of the rotating column. The bottom of the output pipe is connected with a water outlet pipe in a penetrating manner.

[0009] Preferably, the insurance component further includes a spiral spring fixedly connected to the inner wall of the rotating column. One end of the spiral spring away from the rotating column is fixedly connected to the inner wall of the sliding square pipe. A pushing frame is fixedly connected to the side wall of the sliding square pipe. The outer wall of the pushing frame is slidably connected to the inner wall of the first chute. A telescopic rod is fixedly connected to the top of the pushing frame. The end of the telescopic rod away from the pushing frame is fixedly connected to the bottom of the transmission pipe.

[0010] Preferably, the water-blocking component includes a second chute opened on the inner wall of the transmission pipe. A second limiting block is fixedly connected to the inner wall of the second chute. A sliding block is slidably connected to the inner wall of the second chute. A pushing rod is fixedly connected to the bottom of the sliding block. The end of the pushing rod away from the sliding block is fixedly connected to the top of the pushing frame. When the above-mentioned liquid flows back, it will pass through the output pipe along the path of F. At this time, the upward liquid will first contact the bottom of the water-blocking block, forcing the water-blocking block to tilt upward with the spiral spring as the center, presenting a state as shown in Figure 5 Figure [figure number not provided]. The tilted-up water-blocking block will contact the bottom of the first limiting block. The upward flowing water will push the water-blocking block and the sliding square pipe to move upward along the inner wall of the output pipe. At the same time, the sliding square pipe drives the pushing rod and the sliding block to slide upward along the inner wall of the second chute through the pushing frame, so that the sliding block blocks the receiving groove and prevents the flowing-back water from reaching the inside of the water inlet pipe through the receiving groove. In addition, when the sliding square pipe moves upward, the sliding square pipe and the first chute will be misaligned, so that the excess water flow can be ejected outward through the first chute, reducing the pressure on the equipment components during the reverse flow of water. Figure 10 Figure [figure number not provided]. The tilted-up water-blocking block will contact the bottom of the first limiting block. The upward flowing water will push the water-blocking block and the sliding square pipe to move upward along the inner wall of the output pipe. At the same time, the sliding square pipe drives the pushing rod and the sliding block to slide upward along the inner wall of the second chute through the pushing frame, so that the sliding block blocks the receiving groove and prevents the flowing-back water from reaching the inside of the water inlet pipe through the receiving groove. In addition, when the sliding square pipe moves upward, the sliding square pipe and the first chute will be misaligned, so that the excess water flow can be ejected outward through the first chute, reducing the pressure on the equipment components during the reverse flow of water.

[0011] A method for using a multi-hole injection fracturing head for a fracturing wellhead device includes the following steps: S1: Before use, install the fixing frame at the required position and ensure that multiple pipes are connected to the water inlet pipe. At this time, the external solution is transmitted into the transmission pipe through the water inlet pipe; S2: The water flow inside the transmission pipe will contact the outer walls of the first shunt block and the second shunt block. When the natural gas expands, the water flow inside the output pipe will move upward along the output pipe under the thrust and then return to the inside of the transmission pipe again; S3: The refluxed liquid will contact the first shunt block and the second shunt block again. Affected by the first shunt block, the second shunt block and the shape, the liquid will be shunted. The shunted water will flow along the outer walls of the second arc-shaped groove and the first arc-shaped groove. When the two different water flows interact, most of the impact force will be offset.

[0012] The present invention has the following beneficial effects: (1) Aiming at the problem that natural gas pushes the liquid to flow back during the fracturing process, which causes damage to the water pump, a fixing frame and a limiting mechanism are provided inside the equipment. Before use, install the fixing frame at the required position and ensure that multiple pipes are connected to the water inlet pipe. At this time, the external solution is transmitted into the transmission pipe through the water inlet pipe. During this process, the water flow inside the transmission pipe will contact the outer walls of the first shunt block and the second shunt block and is transmitted in the Figure 4 route of G in the figure to complete the state of the equipment transporting water flow. Moreover, when the natural gas expands, the water flow inside the output pipe will move upward along the output pipe under the thrust and then return to the inside of the transmission pipe again. At this time, the refluxed liquid will contact the first shunt block and the second shunt block again. Affected by the first shunt block, the second shunt block and the shape, the liquid will be shunted. The shunted water will flow along the outer walls of the second arc-shaped groove and the first arc-shaped groove and meet at the Figure 5 points H and Y in the figure. When the two different water flows interact, most of the impact force will be offset. Through the application of the above components, the refluxed water collides with each other inside the transmission pipe, and when the water flow passes through multiple first shunt blocks and second shunt blocks, the impact on the water pump by the impact force will be effectively weakened.

[0013] (2) When the liquid in the present invention flows back, the impact force acts on the planes of the first flow dividing block and the second flow dividing block. When the impact force acts on the plane of the first flow dividing block, it will push the telescopic plate and the rotating plate to fold inward. As the telescopic plate is compressed and folded, the plane of the first flow dividing block transforms into a depression. When the flowing-back water contacts the depressed telescopic plate, it forces the water flow to undergo a secondary transformation, and the transformed water flow impacts the remaining water flow and cancels out part of the impact force of the remaining water flow. Through the application of the above components, when reflux occurs, multiple transverse water flows can be increased, improving the water interception effect. Additionally, when the water flow inside the transmission pipe flows along route G, at this time, the pressure of the water flow mainly acts on the arc surfaces of the first flow dividing block and the second flow dividing block. At this time, the rotating plate is pushed by the arc-shaped spring and presents a flat state, enabling the device to reduce the influence of the first flow dividing block and the second flow dividing block on the water flow during forward flow.

[0014] (3) When water passes through the inside of the transmission pipe in the present invention, a large impact force will be formed between the first flow dividing block and the second arc-shaped groove. When the water flow contacts the outer wall of the round pipe, the water flow will be divided into two split flows after bypassing the round pipe. Since the two flows will never be completely symmetric vertically at any time, during the operation of the device, there must be one side with a higher pressure and the other side with a lower pressure. The side with the higher pressure will move towards the side with the lower pressure, ultimately causing the water flow to swing irregularly. The swinging force will drive the guide plate to swing synchronously. During the swinging process of the guide plate, the sand and gravel inside the second arc-shaped groove will be pushed. Through the application of the above components, it is possible to prevent the fine sand in the liquid from precipitating inside the transmission pipe due to the influence of the first arc-shaped groove and the second arc-shaped groove, causing sediment to block the transmission pipe and affecting the imbalance of the internal components of the liquid.

[0015] (4) When the above-mentioned liquid in the present invention flows back, it will Figure 5 pass through the output pipe along the path F in the figure. At this time, the upward liquid will first contact the bottom of the water-blocking block, forcing the water-blocking block to tilt upward with the spiral spring as the center, presenting a state as shown in Figure 10 the figure. The upward-tilted water-blocking block will contact the bottom of the first limiting block, and the upward-flowing water will push the water-blocking block and the sliding square pipe to move upward along the inner wall of the output pipe. At the same time, the sliding square pipe drives the push rod and the sliding block to slide upward along the inner wall of the second chute through the push frame, so that the sliding block blocks the receiving groove and prevents the flowing-back water from reaching the inside of the water inlet pipe through the receiving groove. Additionally, when the sliding square pipe moves upward, the sliding square pipe and the first chute will be misaligned, enabling the excess water flow to spray out through the first chute, reducing the pressure on the device components during water backflow. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic cross-sectional view of the overall structure of the present invention; Figure 2 Schematic diagram of the overall structure of the present invention; Figure 3 Schematic cross-sectional view of the limiting mechanism of the present invention; Figure 4 Schematic diagram of the downstream cross-section of the transmission pipe of the present invention; Figure 5 Schematic diagram of the upstream cross-section of the transmission pipe of the present invention; Figure 6 Schematic diagram of the internal components of the limiting mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of A in the present invention; Figure 8 For the present invention Figure 6 Enlarged schematic diagram of B in the present invention; Figure 9 Schematic cross-sectional view of the insurance component of the present invention; Figure 10 For the present invention Figure 9 Enlarged schematic diagram of C in the present invention; Figure 11 For the present invention Figure 9 Enlarged schematic diagram of D in the present invention; Figure 12 Schematic diagram of the working process of the present invention.

[0018] In the accompanying drawings, the list of components represented by each reference numeral is as follows: In the figure: 1, fixed frame; 11, transmission pipe; 12, receiving groove; 13, first arc groove; 14, second arc groove; 2, limiting mechanism; 21, output pipe; 22, water inlet pipe; 23, first flow dividing block; 24, second flow dividing block; 25, reinforcing frame; 3, enhancing component; 31, rotating plate; 32, telescopic plate; 33, arc spring; 34, circular pipe; 35, guiding plate; 4, insurance component; 41, first sliding groove; 42, sliding square pipe; 43, first limiting block; 44, rotating column; 45, water blocking block; 46, water outlet pipe; 47, spiral spring; 48, pushing frame; 49, telescopic rod; 5, water blocking component; 51, second sliding groove; 52, second limiting block; 53, sliding block; 54, pushing rod. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1. Please refer to Figure 1 - Figure 5 , the present invention is a porous injection fracturing head for a fracturing wellhead device, including a fixing frame 1. A transmission pipe 11 is fixedly connected to the bottom of the fixing frame 1. A receiving groove 12 is formed in the inner wall of the transmission pipe 11. An arc groove one 13 is formed in the inner wall of the transmission pipe 11. An arc groove two 14 is formed in the inner wall of the transmission pipe 11. A water blocking assembly 5 is slidably connected to the inner wall of the transmission pipe 11; A limiting mechanism 2. The limiting mechanism 2 includes an output pipe 21 connected through the bottom of the transmission pipe 11. A plurality of water inlet pipes 22 are connected through the side wall of the transmission pipe 11. Four flow dividing blocks one 23 are fixedly connected to the inner wall of the transmission pipe 11. Three flow dividing blocks two 24 are fixedly connected to the inner wall of the transmission pipe 11. A reinforcing frame 25 is fixedly connected to the outer wall of the transmission pipe 11. An insurance assembly 4 is slidably connected to the inner wall of the output pipe 21. An enhancing assembly 3 is rotatably connected to the inner wall of the flow dividing block one 23. Before use, the fixing frame 1 is installed at the required position, and it is ensured that multiple pipes are connected to the water inlet pipes 22. At this time, the external solution is transmitted into the transmission pipe 11 through the water inlet pipes 22. In this process, the water flow inside the transmission pipe 11 will contact the outer walls of the flow dividing blocks one 23 and the flow dividing blocks two 24, and will be transmitted along the Figure 4 route G in Figure 5 to complete the state of the device transporting water flow. Moreover, when the natural gas expands, the water flow inside the output pipe 21 will move upward along the output pipe 21 under the thrust and return to the transmission pipe 11 again. At this time, the reflux liquid will contact the flow dividing blocks one 23 and the flow dividing blocks two 24 again. Affected by the flow dividing blocks one 23, the flow dividing blocks two 24 and the shape, the liquid will be divided. The divided water will flow along the outer walls of the arc groove two 14 and the arc groove one 13, and will meet at

[0021] points H and Y in Figure 6 - Figure 12, the present invention is a porous injection fracturing head for a fracturing wellhead device. On the basis of Embodiment 1, the enhancement component 3 includes a rotating plate 31 rotatably connected to the inner wall of the first flow splitting block 23. A telescopic plate 32 is slidably connected to the inner wall of the rotating plate 31. An arc-shaped spring 33 is fixedly connected to the bottom of the rotating plate 31. One ends of the two telescopic plates 32 away from the rotating plate 31 are rotatably connected.

[0022] The enhancement component 3 further includes four circular tubes 34 fixedly connected to the inner wall of the transmission pipe 11. A guiding plate 35 is rotatably connected to the outer walls of the four circular tubes 34. One end of the arc-shaped spring 33 away from the rotating plate 31 is fixedly connected to the inner wall of the first flow splitting block 23. When the liquid flows back, the impact force will act on the planes of the first flow splitting block 23 and the second flow splitting block 24. When this impact force acts on the plane of the first flow splitting block 23, it will push the telescopic plate 32 and the rotating plate 31 to fold inward. As the telescopic plate 32 is compressed and folded, the plane of the first flow splitting block 23 changes to a concave shape. When the flowing-back water contacts the concave telescopic plate 32, it forces the water flow to undergo a secondary change, and the water flow with a changed direction will impact the remaining water flow and offset part of the impact force of the remaining water flow. Through the application of the above components, when there is a backflow, multiple lateral water flows can be increased, improving the water interception effect; in addition, when the water flow inside the transmission pipe 11 flows along the G route, at this time, the pressure of the water flow mainly acts on the arc surfaces of the first flow splitting block 23 and the second flow splitting block 24. At this time, the rotating plate 31 is pushed by the arc-shaped spring 33 to present a flat state, so that when the device is flowing forward, the influence of the first flow splitting block 23 and the second flow splitting block 24 on the water flow is reduced.

[0023] The safety component 4 includes a first chute 41 opened on the side wall of the output pipe 21. A sliding square pipe 42 is slidably connected to the inner wall of the output pipe 21. A first limiting block 43 is fixedly connected to the inner wall of the sliding square pipe 42. When water passes through the inside of the transmission pipe 11, a large impact force will be formed between the first flow splitting block 23 and the second arc-shaped groove 14. When the water flow contacts the outer wall of the circular tube 34, the water flow will be divided into two split flows after bypassing the circular tube 34. Since the two split flows will never be completely symmetrical up and down at any time, during the operation of the device, there must be one side with a higher pressure and the other side with a lower pressure. The side with a higher pressure will move towards the side with a lower pressure, eventually causing the water flow to swing irregularly. The swinging force will drive the guiding plate 35 to swing synchronously. During the swinging process of the guiding plate 35, the sand and gravel inside the second arc-shaped groove 14 will be pushed. Through the application of the above components, it is avoided that the fine sand in the liquid precipitates inside the transmission pipe 11 due to the influence of the first arc-shaped groove 13 and the second arc-shaped groove 14, causing the transmission pipe 11 to be blocked by sediment and affecting the imbalance of the internal components of the liquid.

[0024] The insurance component 4 further includes a rotating column 44 rotatably connected to the inner wall of the sliding square tube 42. A water blocking block 45 is fixedly connected to the side wall of the rotating column 44. The bottom of the output pipe 21 is connected to a water outlet pipe 46 in a penetrating manner.

[0025] The insurance component 4 further includes a spiral spring 47 fixedly connected to the inner wall of the rotating column 44. One end of the spiral spring 47 away from the rotating column 44 is fixedly connected to the inner wall of the sliding square tube 42. A pushing frame 48 is fixedly connected to the side wall of the sliding square tube 42. The outer wall of the pushing frame 48 is slidably connected to the inner wall of the first chute 41. A telescopic rod 49 is fixedly connected to the top of the pushing frame 48. One end of the telescopic rod 49 away from the pushing frame 48 is fixedly connected to the bottom of the transmission pipe 11.

[0026] The water blocking component 5 includes a second chute 51 opened on the inner wall of the transmission pipe 11. A second limiting block 52 is fixedly connected to the inner wall of the second chute 51. A sliding block 53 is slidably connected to the inner wall of the second chute 51. A pushing rod 54 is fixedly connected to the bottom of the sliding block 53. One end of the pushing rod 54 away from the sliding block 53 is fixedly connected to the top of the pushing frame 48. When the above-mentioned liquid flows back, it will pass through the output pipe 21 along the path of F. At this time, the upward liquid will first contact the bottom of the water blocking block 45, forcing the water blocking block 45 to tilt upward with the spiral spring 47 as the center, presenting a state as shown in Figure 5 When the above-mentioned liquid flows back, it will pass through the output pipe 21 along the path of F. At this time, the upward liquid will first contact the bottom of the water blocking block 45, forcing the water blocking block 45 to tilt upward with the spiral spring 47 as the center, presenting a state as shown in Figure 10 As shown. The tilted-up water blocking block 45 will contact the bottom of the first limiting block 43, and the upward flowing water will push the water blocking block 45 and the sliding square tube 42 to move upward along the inner wall of the output pipe 21. At the same time, the sliding square tube 42 drives the pushing rod 54 and the sliding block 53 to slide upward along the inner wall of the second chute 51 through the pushing frame 48, so that the sliding block 53 blocks the receiving groove 12 and prevents the backflowing water from reaching the inside of the water inlet pipe 22 through the receiving groove 12; in addition, when the sliding square tube 42 moves upward, the sliding square tube 42 and the first chute 41 will be misaligned, so that the excess water flow can be ejected outward through the first chute 41, reducing the pressure on the equipment components when the water flows back.

[0027] The usage method of this fracturing head device includes the following steps: S1: Before use, install the fixing frame 1 at the required position and ensure that multiple pipes are connected to the water inlet pipe 22. At this time, the external solution is transmitted to the inside of the transmission pipe 11 through the water inlet pipe 22; S2: The water flow inside the transmission pipe 11 will contact the outer walls of the first flow dividing block 23 and the second flow dividing block 24. When the natural gas expands, the water flow inside the output pipe 21 will be pushed by the thrust and move upward along the output pipe 21 and return to the inside of the transmission pipe 11 again; S3: The refluxed liquid will come into contact with the first flow splitter block 23 and the second flow splitter block 24 again. Affected by the first flow splitter block 23, the second flow splitter block 24 and the outer shape, the liquid will be split. The split water will flow along the outer walls of the second arc-shaped groove 14 and the first arc-shaped groove 13. When the two different water flows interact, most of the impact force will be offset.

[0028] A specific application of this embodiment is as follows: Before use, install the fixing frame 1 at the required position and ensure that multiple pipes are connected to the water inlet pipe 22. At this time, the external solution is transmitted into the interior of the transmission pipe 11 through the water inlet pipe 22. During this process, the water flow inside the transmission pipe 11 will come into contact with the outer walls of the first flow splitter block 23 and the second flow splitter block 24 and will Figure 4 be transmitted along the route G in the figure, completing the state of the device for conveying water flow. Moreover, when the natural gas expands, the water flow inside the output pipe 21 will move upward along the output pipe 21 under the thrust and will return to the interior of the transmission pipe 11 again. At this time, the refluxed liquid will come into contact with the first flow splitter block 23 and the second flow splitter block 24 again. Affected by the first flow splitter block 23, the second flow splitter block 24 and the outer shape, the liquid will be split. The split water will flow along the outer walls of the second arc-shaped groove 14 and the first arc-shaped groove 13 and will Figure 5 converge at points H and Y in the figure. When the two different water flows interact, most of the impact force will be offset. Through the application of the above components, the refluxed water will collide with each other inside the transmission pipe 11. When the water flow passes through multiple first flow splitter blocks 23 and second flow splitter blocks 24, the impact force on the water pump will be effectively weakened.

[0029] When the liquid refluxes, the impact force will act on the planes of the first flow splitter block 23 and the second flow splitter block 24. When the impact force acts on the plane of the first flow splitter block 23, it will push the telescopic plate 32 and the rotating plate 31 to fold inward. As the telescopic plate 32 is compressed and folded, the plane of the first flow splitter block 23 changes to a concave shape. When the refluxed water contacts the concave telescopic plate 32, it forces the water flow to undergo a secondary transformation. The water flow with the changed flow direction will impact the remaining water flow and offset part of the impact force of the remaining water flow. Through the application of the above components, when the reflux occurs, multiple transverse water flows can be increased to improve the water interception effect; in addition, when the water flow inside the transmission pipe 11 flows along the route G, at this time, the pressure of the water flow mainly acts on the arc surfaces of the first flow splitter block 23 and the second flow splitter block 24. At this time, the rotating plate 31 is pushed by the arc-shaped spring 33 and presents a flat state, so that when the device is flowing in the forward direction, the influence of the first flow splitter block 23 and the second flow splitter block 24 on the water flow is reduced.

[0030] When water passes through the inside of the transfer pipe 11, a large impact force will be formed between the first shunt block 23 and the second arc-shaped groove 14. When the water flow contacts the outer wall of the circular pipe 34, the water flow will be divided into two shunts after bypassing the circular pipe 34. Since the two shunts will never be completely symmetrical up and down at any time, during the operation of the device, there must be a higher pressure on one side and a lower pressure on the other side. The side with the higher pressure will move towards the side with the lower pressure, eventually causing the water flow to swing irregularly. The force of this swing will drive the guide plate 35 to swing synchronously. During the swing of the guide plate 35, the sand and gravel inside the second arc-shaped groove 14 will be pushed. Through the application of the above components, it is avoided that the fine sand in the liquid precipitates inside the transfer pipe 11 due to the influence of the first arc-shaped groove 13 and the second arc-shaped groove 14, causing sediment blockage of the transfer pipe 11 and affecting the imbalance of the internal components of the liquid. When the above liquid flows back, it will Figure 5 pass through the output pipe 21 along the path of F in, and at this time, the upward liquid will first contact the bottom of the water-blocking block 45, forcing the water-blocking block 45 to tilt upward with the spiral spring 47 as the center, presenting a state as shown in Figure 10 . The upward-tilted water-blocking block 45 will contact the bottom of the first limiting block 43, and the upward-flowing water will push the water-blocking block 45 and the sliding square pipe 42 to move upward along the inner wall of the output pipe 21. At the same time, the sliding square pipe 42 drives the push rod 54 and the sliding block 53 to slide upward along the inner wall of the second chute 51 through the push frame 48, so that the sliding block 53 blocks the receiving groove 12 and prevents the flowing-back water from reaching the inside of the water inlet pipe 22 through the receiving groove 12; in addition, when the sliding square pipe 42 moves upward, the sliding square pipe 42 and the first chute 41 will be misaligned, so that the excess water flow can be ejected outward through the first chute 41, reducing the pressure on the device components when the water flows back.

[0031] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A porous injection fracturing head for a fracturing wellhead device, comprising a fixed frame (1), a transmission pipe (11) being fixedly connected to the bottom of the fixed frame (1), a receiving groove (12) being provided on the inner wall of the transmission pipe (11), an arc-shaped groove 1 (13) being provided on the inner wall of the transmission pipe (11), an arc-shaped groove 2 (14) being provided on the inner wall of the transmission pipe (11), a water retaining assembly (5) being slidably connected to the inner wall of the transmission pipe (11), characterized in that: Also includes: A limiting mechanism (2), the limiting mechanism (2) comprising an output pipe (21) connected through the bottom of the transmission pipe (11), a plurality of water inlet pipes (22) connected through the side wall of the transmission pipe (11), four flow diversion blocks (23) fixedly connected to the inner wall of the transmission pipe (11), three flow diversion blocks (24) fixedly connected to the inner wall of the transmission pipe (11), a reinforcing frame (25) fixedly connected to the outer wall of the transmission pipe (11), a safety assembly (4) slidably connected to the inner wall of the output pipe (21), and a reinforcing assembly (3) rotatably connected to the inner wall of the flow diversion block (23).

2. The multi-porous injection fracturing head for fracturing wellhead equipment according to claim 1, characterized in that: The reinforcing assembly (3) comprises a rotating plate (31) rotatably connected to the inner wall of the diverter block (23); a telescopic plate (32) is slidably connected to the inner wall of the rotating plate (31); an arc spring (33) is fixedly connected to the bottom of the rotating plate (31); and the ends of the two telescopic plates (32) away from the rotating plate (31) are rotatably connected.

3. The multi-porous injection fracturing head for fracturing wellhead equipment according to claim 2, characterized in that: The reinforcing assembly (3) further comprises four circular tubes (34) fixedly connected to the inner wall of the transmission tube (11); guide plates (35) are rotatably connected to the outer walls of the four circular tubes (34); and one end of the arc spring (33) away from the rotating plate (31) is fixedly connected to the inner wall of the diverter block 1 (23).

4. The multi-porous injection fracturing head for fracturing wellhead equipment according to claim 3, characterized in that: The safety assembly (4) comprises a sliding groove (41) provided on the side wall of the output pipe (21), a sliding square pipe (42) being slidably connected to the inner wall of the output pipe (21), and a limiting block (43) being fixedly connected to the inner wall of the sliding square pipe (42).

5. The multi-porous injection fracturing head for fracturing wellhead equipment according to claim 4, characterized in that: The safety assembly (4) further comprises a rotating column (44) rotatably connected to the inner wall of the sliding square tube (42), a water blocking block (45) being fixedly connected to the side wall of the rotating column (44), and a water outlet pipe (46) being connected through the bottom of the output pipe (21).

6. The multi-hole injection fracturing head for fracturing wellhead equipment according to claim 5, characterized in that: The safety assembly (4) further comprises a vortex spring (47) fixedly connected to the inner wall of the rotating column (44); one end of the vortex spring (47) is fixedly connected to the inner wall of the sliding square tube (42) on the rotating column (44); a push frame (48) is fixedly connected to the side wall of the sliding square tube (42); an outer wall of the push frame (48) is slidably connected to the inner wall of the slide groove (41); a telescopic rod (49) is fixedly connected to the top of the push frame (48); and one end of the telescopic rod (49) away from the push frame (48) is fixedly connected to the bottom of the transmission tube (11).

7. The multi-porous injection fracturing head for fracturing wellhead equipment according to claim 6, characterized in that: The water retaining assembly (5) comprises a second slide groove (51) provided on the inner wall of the transmission pipe (11); a second limit block (52) is fixedly connected to the inner wall of the second slide groove (51); a sliding block (53) is slidably connected to the inner wall of the second slide groove (51); a push rod (54) is fixedly connected to the bottom of the sliding block (53); and an end of the push rod (54) away from the sliding block (53) is fixedly connected to the top of the push frame (48).

8. A method for using a multi-porous injection fracturing head for a fracturing wellhead device, using the device of the multi-porous injection fracturing head for a fracturing wellhead as claimed in claim 7, characterized in that: The following steps are included: S1: Before use, the fixing frame (1) is installed at a desired position, and multiple pipes are connected to the water inlet pipe (22), and the external solution is transmitted to the inside of the transmission pipe (11) through the water inlet pipe (22); S2: The water flow inside the transmission pipe (11) will contact the outer walls of the diverter block 1 (23) and the diverter block 2 (24). When the natural gas expands, the water flow inside the output pipe (21) will be pushed upward along the output pipe (21) and return to the inside of the transmission pipe (11); S3: The returned liquid will contact the diverter block 1 (23) and the diverter block 2 (24) again, and the liquid will be diverted due to the influence of the diverter block 1 (23), the diverter block 2 (24) and the shape. The diverted water will flow along the outer wall of the arc groove 2 (14) and the arc groove 1 (13). When the two different water flows interact, most of the impact force will be offset.

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