Well drilling fracturing device for oil field yield increase

Abstract

The invention discloses a well drilling fracturing device for oil field yield increase, and relates to the technical field of oil field collection, the well drilling fracturing device comprises a fracturing filtering mechanism and a bottom rotating bearing installed in the fracturing filtering mechanism, the bottom of the fracturing filtering mechanism is provided with a connection sealing mechanism, and the bottom of the connection sealing mechanism is provided with a main pipeline; the fracturing filtering mechanism comprises a filtering support, a plurality of sewage draining holes are formed in the outer side of the filtering support, a worm gear limiting cover is fixedly installed at the bottom of the filtering support, rotating supports are symmetrically installed on the side, close to the interior of the worm gear limiting cover, of the filtering support, and rotating motors are fixedly installed on the outer sides of the rotating supports; by utilizing the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates anticlockwise, the temporary plugging agent can move towards the inner side of the filter screen cylinder under the action of the groove in the vortex cleaning impeller, so that the conveying efficiency of the temporary plugging agent is improved, and meanwhile, the vortex cleaning impeller can clean the outer surface of the filter screen cylinder.

Description

Technical Field

[0001] This invention relates to the field of oilfield extraction technology, specifically to a drilling and fracturing device for increasing oilfield production. Background Technology

[0002] In the process of oil extraction, it is not just about extracting in one direction, but rather in multiple directions around the circumference. That is, as the extraction progresses and all the crude oil in the old fracture control zone has been extracted, it is necessary to implement temporary plugging and reversal fracturing to open up new layers in the vertical and horizontal directions and extract crude oil outside the old fracture control zone. Most existing oilfield production enhancement drilling and fracturing equipment connects pipelines, with filters fixedly connected inside the pipelines. Because the filters are inside the fixed pipelines, after long-term use, the plugging agent particles will stick to the filters, thus blocking them. This makes it difficult for workers to clean, affecting the plugging agent's ability to open new fractures and reverse the fractures, thus impacting oil well production.

[0003] Publication No. CN213540365U discloses an oilfield production enhancement drilling fracturing device. Because the rotating hole and shaft are clearance-fitted, the flip cover on the rotating rod can rotate around the shaft. When water flows back in the main pipeline, the pressure inside the pipeline increases, allowing the flip cover on the rotating rod to fit tightly against the connecting plate, thus preventing backflow. When the filter screen is clogged with temporary plugging agent, due to the threaded connection between the internal and external threads, the frame can be removed from the fixing groove of the connecting plate by rotating the frame, allowing for filter screen replacement. This helps ensure the fracturing effect of the fracturing device. By inserting the fixing pin into the fixing hole one of flange one and the fixing hole two of flange two, the protrusion on the sealing groove is inserted into the slot of the sealing ring. The protrusion squeezes the sealing ring, causing it to deform, thereby sealing the gap between flange one and flange two and improving the device's sealing performance. However, this patent still has the following problems in actual use: Although this oilfield production enhancement drilling and fracturing device can replace the filter screen when it becomes clogged with temporary plugging agent due to the internal and external threaded connection, allowing the frame to be removed from the fixing groove of the connecting plate and thus ensuring the fracturing effect of the device, the temporary plugging agent slowly adheres to the filter screen during delivery. Therefore, as the temporary plugging agent is delivered, the amount adhering to the filter screen increases, affecting the delivery efficiency and hindering oilfield production enhancement drilling and fracturing. Furthermore, the inability to monitor the filter screen's condition in real time makes it difficult to accurately determine the timing of filter screen cleaning, resulting in delayed cleaning and impacting the delivery efficiency of the temporary plugging agent, ultimately affecting the oil extraction effect.

[0004] Therefore, a drilling fracturing device for oilfield production enhancement is proposed to address the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a drilling and fracturing device for oilfield production enhancement, addressing the problems mentioned in the background art where, during the delivery of temporary plugging agents, the agents slowly adhere to the filter screen, resulting in an increasing amount of agent adhering to the screen as the agent is delivered, thus affecting the efficiency of agent delivery and hindering drilling and fracturing for oilfield production enhancement. Furthermore, the inability to monitor the filter screen's condition in real time makes it impossible to accurately determine the timing of filter screen cleaning, hindering timely cleaning and impacting the delivery efficiency of the temporary plugging agent, thereby affecting oil extraction efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling fracturing device for oilfield production enhancement, comprising a fracturing and filtering mechanism, and a bottom rotating bearing installed inside the fracturing and filtering mechanism; The bottom of the fracturing and filtration mechanism is provided with a connecting sealing mechanism, and the bottom of the connecting sealing mechanism is provided with a main pipe. Also includes: The fracturing and filtration mechanism includes a filter support, with several drain holes on the outer side of the filter support, and a worm gear limiting cover fixedly installed at the bottom of the filter support. Among them, a rotating bracket is symmetrically installed on the inner side of the filter bracket near the worm gear limiting cover, and a rotating motor is fixedly installed on the outer side of the rotating bracket; The output end of the rotating motor is fixedly connected to a rotating worm, and a rotating worm wheel is meshed with one side of the rotating worm. A rotating connecting ring is fixedly installed inside the rotating worm gear. The rotating connecting ring is rotatably connected to the filter bracket. A rotating base is fixedly installed on the top of the rotating connecting ring. Several vortex cleaning impellers are fixedly installed on the top of the rotating base. A top rotating ring is fixedly installed on the top of the vortex cleaning impellers. The bottom rotating bearing is rotatably connected to the rotating chassis. Several top connecting rods are fixedly installed on the top of the top rotating ring. A connecting turntable is fixedly installed between the top connecting rods. A filter screen cylinder is rotatably connected to the bottom of the connecting turntable. The rotating chassis is rotatably connected to the bottom rotating bearing.

[0007] A first pipe is fixedly installed on the top of the filter bracket, and a spiral cleaning blade is fixedly installed on the top of the top connecting rod. The spiral cleaning blade is in close contact with the inner wall of the first pipe. A valve bracket is fixedly installed on the top of the first pipe near the spiral cleaning blade, and a support spring assembly is fixedly installed at the center of the top of the valve bracket.

[0008] Preferably, a first valve plugging block is fixedly installed on the top of the supporting spring assembly, a first valve plugging ring is fixedly installed on the top of the first pipe near the first valve plugging block, an impurity collection box is fixedly installed on the outside of the first pipe, a sewage pump is fixedly installed on one side of the top of the impurity collection box, a sewage pipe is fixedly connected to the output end of the sewage pump, and a plurality of connecting bends are fixedly installed at the bottom of the impurity collection box, with a one-way valve ring fixedly installed at the end of the connecting bend.

[0009] Preferably, a plurality of first valve connecting rods are fixedly installed on the side of the connecting bend away from the one-way valve ring, a first valve fixing plate is fixedly installed between the first valve connecting rods, a first valve sliding rod is fixedly installed on one side of the first valve fixing plate, a first valve telescopic rod is fixedly installed at the end of the first valve sliding rod, a first valve spring is fixedly connected to the outer side of the first valve sliding rod near the first valve telescopic rod, a first valve sleeve is fixedly installed on the outer side of the first valve spring, and a sealing piston is fixedly installed on one side of the first valve sleeve, the sealing piston being in close contact with the one-way valve ring.

[0010] Preferably, the connecting sealing mechanism includes an auxiliary pipe, which is fixedly installed at the bottom of the filter screen cylinder and fixedly connected to the worm gear limiting cover. A plurality of second valve connecting rods are fixedly installed inside the auxiliary pipe, and a second valve fixing plate is fixedly installed between the second valve connecting rods. A second valve sleeve is fixedly installed at the top center of the second valve fixing plate, and a second valve telescopic rod is fixedly installed inside the second valve sleeve. A second valve spring is fixedly installed on the outer side of the second valve sleeve near the second valve telescopic rod.

[0011] Preferably, a second valve sliding rod is fixedly installed on the top of the second valve telescopic rod and the second valve spring, a second valve sealing block is fixedly installed on the top of the second valve sliding rod, a first sealing slope is provided on the outer side of the second valve sealing block, a second valve sealing ring is fixedly installed on the auxiliary pipe near the top of the second valve sealing block, and a second sealing slope is provided on the inner side of the bottom of the second valve sealing ring.

[0012] Preferably, a top flange is fixedly installed at the bottom of the auxiliary pipe, and a bottom flange is provided at the bottom of the top flange. Both the top flange and the bottom flange have sealing grooves inside, and sealing rings are provided inside the sealing grooves. Both the top flange and the bottom flange are threaded with fixing bolts, and mounting nuts are threaded on the outer bottom of the fixing bolts. The main pipe is fixedly installed at the bottom of the bottom flange.

[0013] Compared with the prior art, the beneficial effects of this invention are: This drilling and fracturing device for oilfield production enhancement utilizes the structural characteristics of a vortex cleaning impeller. When the vortex cleaning impeller rotates counterclockwise, the internal grooves of the vortex cleaning impeller cause the temporary plugging agent to move towards the inner side of the filter screen, thereby improving the delivery efficiency of the temporary plugging agent. Simultaneously, the vortex cleaning impeller can clean the outer surface of the filter screen, preventing impurities and dissolved temporary plugging agent from adhering to the surface of the filter screen, thus affecting the filtration effect of the filter screen. At the same time, the top rotating ring drives the top connecting rod and the spiral cleaning blade to rotate, utilizing… The spiral cleaning blades effectively clean the inner wall of the first pipe, preventing the adhesion of dissolved temporary plugging agent and thus reducing the pipe's diameter and affecting the agent's delivery efficiency. The auxiliary pipe utilizes a second valve telescopic rod and a second valve spring to move the second valve sliding rod and the second valve plugging block up and down. When the first plugging bevel at the top of the second valve plugging block is in contact with the second plugging bevel at the bottom of the second valve plugging ring, the auxiliary pipe is sealed, preventing backflow of liquid. The specific details are as follows: 1. By setting up a fracturing filtration mechanism, a rotating motor drives a rotating worm gear. Utilizing the meshing connection between the worm gear and the worm wheel, the worm wheel drives the rotating connecting ring and the rotating base. Simultaneously, the rotating base drives the vortex cleaning impeller and the top rotating ring. The vortex cleaning impeller's structural characteristics allow it to move the temporary plugging agent towards the inside of the filter cylinder when rotating counterclockwise, improving the agent's delivery efficiency. Simultaneously, the vortex cleaning impeller cleans the outer surface of the filter cylinder, preventing impurities and dissolved temporary plugging agent from adhering to the surface and affecting the filtration effect. Furthermore, the top rotating ring drives the top connecting rod and the spiral cleaning blades. The spiral cleaning blades' structural characteristics clean the inner wall of the first pipe, preventing the adhesion of dissolved temporary plugging agent. The agent reduces the diameter of the first pipe, thus affecting the delivery efficiency of the temporary plugging agent. When it is necessary to clean the impurities and dissolved temporary plugging agent, the chassis and vortex cleaning impeller are rotated counterclockwise. Utilizing the structural characteristics of the vortex cleaning impeller, the vortex cleaning impeller can drive the drilling and fracturing fluid to move outward. Since the first pipe is equipped with a first valve plugging block and a first valve plugging ring, when the fluid flows backward, the first valve plugging block and the first valve plugging ring can be connected in close contact under the action of the support spring assembly, thereby achieving the closure of the first pipe. Therefore, the fluid squeezes the plugging piston at the end of the connecting bend, and at the same time, the plugging piston drives the first valve sleeve to squeeze the first valve telescopic rod and the first valve spring. When the plugging piston separates from the one-way valve ring, the impurities and fluid can enter the impurity collection box for storage through the connecting bend. The impurities and fluid inside the impurity collection box can be discharged through the sewage pump and sewage pipe. 2. By setting up a connecting sealing mechanism, not only can the second valve sliding rod and the second valve plugging block be moved up and down using the second valve telescopic rod and the second valve spring inside the auxiliary pipeline, but when the first plugging slope at the top of the second valve plugging block is in contact with the second plugging slope at the bottom of the second valve plugging ring, the auxiliary pipeline can be sealed, preventing backflow of liquid. By setting up top and bottom flanges and using the threaded connection of fixing bolts and mounting nuts, the auxiliary pipeline and the main pipeline can be connected. The sealing rings inside the top and bottom flanges improve the sealing performance of the connection between the auxiliary pipeline and the main pipeline, facilitating the disassembly and maintenance of the fracturing filter mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the fracturing and filtration mechanism in this invention; Figure 3This is a three-dimensional structural diagram of the first pipeline cross-section in this invention; Figure 4 This is a three-dimensional cross-sectional structural diagram of the filter support in this invention; Figure 5 This is a three-dimensional cross-sectional structural diagram of the worm gear limiting cover in this invention; Figure 6 This is a three-dimensional structural diagram of the rotating chassis and vortex cleaning impeller in this invention; Figure 7 This is a three-dimensional cross-sectional structural diagram of the impurity collection box in this invention; Figure 8 This is a three-dimensional structural diagram of the cross-section of the connecting bend and the first valve sleeve in this invention; Figure 9 This is a three-dimensional cross-sectional structural diagram of the connecting sealing mechanism in this invention; Figure 10 This is a three-dimensional cross-sectional structural diagram of the second valve sleeve and the second valve sealing ring in this invention; Figure 11 This is a three-dimensional structural diagram of the top flange cross-section in this invention.

[0015] In the diagram: 1. Fracturing and filtration mechanism; 101. Filter support; 102. Drain hole; 103. Worm gear limit cover; 104. Rotating support; 105. Rotating motor; 106. Rotating worm; 107. Rotating worm wheel; 108. Rotating connecting ring; 109. Rotating chassis; 110. Vortex cleaning impeller; 111. Top rotating ring; 112. Bottom rotating bearing; 113. Top connecting rod; 114. Connecting turntable; 115. Filter screen cylinder; 116. First pipe; 117. Spiral cleaning blade; 118. Valve support; 119. Support spring assembly; 120. First valve sealing block; 121. First valve sealing ring; 122. Impurity collection box; 123. Sewage pump; 124. Sewage pipe; 125. Connecting bend; 126. One-way valve ring; 127. First... 1. Valve connecting rod; 128. First valve fixing plate; 129. First valve sliding rod; 130. First valve telescopic rod; 131. First valve spring; 132. First valve sleeve; 133. Sealing piston; 2. Connecting sealing mechanism; 201. Auxiliary pipeline; 202. Second valve connecting rod; 203. Second valve fixing plate; 204. Second valve sleeve; 205. Second valve telescopic rod; 206. Second valve spring; 207. Second valve sliding rod; 208. Second valve sealing block; 209. First sealing bevel; 210. Second valve sealing ring; 211. Second sealing bevel; 212. Top flange; 213. Bottom flange; 214. Sealing groove; 215. Sealing ring; 216. Fixing bolt; 217. Mounting nut; 218. Main pipeline. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-6 This invention provides a technical solution: a drilling fracturing device for oilfield production enhancement, comprising a fracturing filter mechanism 1 and a bottom rotating bearing 112 installed inside the fracturing filter mechanism 1. A connecting sealing mechanism 2 is provided at the bottom of the fracturing filter mechanism 1, and a main pipe 218 is provided at the bottom of the connecting sealing mechanism 2. The fracturing filter mechanism 1 includes a filter support 101, with several drain holes 102 opened on the outer side of the filter support 101. A worm gear limiting cover 103 is fixedly installed at the bottom of the filter support 101. A rotating bracket 104 is symmetrically installed on the inner side of the frame 101 near the worm gear limiting cover 103. A rotating motor 105 is fixedly installed on the outer side of the rotating bracket 104. A rotating worm 106 is fixedly connected to the output end of the rotating motor 105. A rotating worm wheel 107 is meshed with one side of the rotating worm 106. A rotating connecting ring 108 is fixedly installed inside the rotating worm wheel 107. The rotating connecting ring 108 is rotatably connected to the filter bracket 101. A rotating base 109 is fixedly installed on the top of the rotating connecting ring 108. A plurality of vortex cleaning impellers 110 are fixedly mounted on the top of the rotating chassis 109. A top rotating ring 111 is fixedly mounted on the top of the vortex cleaning impellers 110. A bottom rotating bearing 112 is rotatably connected to the rotating chassis 109. A plurality of top connecting rods 113 are fixedly mounted on the top of the top rotating ring 111. A connecting turntable 114 is fixedly mounted between the top connecting rods 113. A filter screen cylinder 115 is rotatably connected to the bottom of the connecting turntable 114. A rotating motor 105 drives a rotating worm gear 106 to rotate. The meshing connection between rod 106 and rotating worm gear 107 causes rotating worm gear 107 to drive rotating connecting ring 108 and rotating base 109 to rotate. At the same time, rotating base 109 drives vortex cleaning impeller 110 and top rotating ring 111 to rotate. The structural features of vortex cleaning impeller 110 can be utilized. When vortex cleaning impeller 110 rotates counterclockwise, the internal groove of vortex cleaning impeller 110 can move the temporary blockage agent towards the inside of filter screen cylinder 115, thereby improving the delivery efficiency of temporary blockage agent.

[0018] Please see Figures 3-6The rotating base 109 is rotatably connected to the bottom rotating bearing 112. The top of the filter bracket 101 is fixedly installed with a first pipe 116, and the top of the top connecting rod 113 is fixedly installed with a spiral cleaning blade 117. The spiral cleaning blade 117 is in close contact with the inner wall of the first pipe 116. The vortex cleaning impeller 110 can clean the outer surface of the filter cylinder 115 to prevent impurities and dissolved temporary blockage agent from adhering to the surface of the filter cylinder 115, thereby affecting the filtration effect of the filter cylinder 115. At the same time, the top rotating ring 111 drives the top connecting rod 113 and the spiral cleaning blade 117 to rotate. Utilizing the structural characteristics of the spiral cleaning blade 117, the inner wall of the first pipe 116 can be cleaned to prevent a certain amount of dissolved temporary blockage agent from adhering to the inner wall of the first pipe 116, thereby reducing the aperture of the first pipe 116 and affecting the delivery efficiency of the temporary blockage agent.

[0019] Please see Figures 3-8A valve bracket 118 is fixedly installed on the top of the first pipe 116 near the spiral cleaning blade 117. A support spring assembly 119 is fixedly installed at the center of the top of the valve bracket 118. A first valve sealing block 120 is fixedly installed on the top of the support spring assembly 119. A first valve sealing ring 121 is fixedly installed on the top of the first pipe 116 near the top of the first valve sealing block 120. An impurity collection box 122 is fixedly installed on the outside of the first pipe 116. A sewage pump 123 is fixedly installed on one side of the top of the impurity collection box 122. A sewage pipe 124 is fixedly connected to the output end of the sewage pump 123. Several connecting bends 125 are fixedly installed at the bottom. A one-way valve ring 126 is fixedly installed at the end of each connecting bend 125. Several first valve connecting rods 127 are fixedly installed on the side of the connecting bend 125 away from the one-way valve ring 126. A first valve fixing plate 128 is fixedly installed between the first valve connecting rods 127. A first valve sliding rod 129 is fixedly installed on one side of the first valve fixing plate 128. A first valve telescopic rod 130 is fixedly installed at the end of the first valve sliding rod 129. A first valve spring 131 is fixedly connected to the outer side of the first valve sliding rod 129 near the first valve telescopic rod 130. A first valve sleeve 132 is fixedly installed on the outside of the door spring 131. A plugging piston 133 is fixedly installed on one side of the first valve sleeve 132. The plugging piston 133 is in close contact with the one-way valve ring 126. When it is necessary to clean impurities and dissolved temporary plugging agent, the chassis 109 and the vortex cleaning impeller 110 are rotated counterclockwise. Utilizing the structural characteristics of the vortex cleaning impeller 110, it can drive the drilling and fracturing fluid to move outward. Since the first valve plugging block 120 and the first valve plugging ring 121 are set inside the first pipe 116, when the fluid flows backward, it supports the spring assembly 11. Under the action of 9, the first valve plugging block 120 and the first valve plugging ring 121 can be connected to fit together, thereby achieving the closure of the first pipe 116. Therefore, the liquid squeezes the plugging piston 133 at the end of the connecting bend 125. At the same time, the plugging piston 133 drives the first valve sleeve 132 to squeeze the first valve telescopic rod 130 and the first valve spring 131. When the plugging piston 133 separates from the one-way valve ring 126, impurities and liquid can enter the impurity collection box 122 through the connecting bend 125 for storage. The impurities and liquid inside the impurity collection box 122 can be discharged through the sewage pump 123 and the sewage pipe 124.

[0020] Please see Figure 1 , Figures 9-10The connecting sealing mechanism 2 includes an auxiliary pipe 201, which is fixedly installed at the bottom of the filter screen cylinder 115. The auxiliary pipe 201 is fixedly connected to the worm gear limiting cover 103. Several second valve connecting rods 202 are fixedly installed inside the auxiliary pipe 201. A second valve fixing plate 203 is fixedly installed between the second valve connecting rods 202. A second valve sleeve 204 is fixedly installed at the top center of the second valve fixing plate 203. A second valve telescopic rod 205 is fixedly installed inside the second valve sleeve 204. A second valve spring 206 is fixedly installed on the outer side of the second valve sleeve 204 near the second valve telescopic rod 205. A second valve sliding rod 207 is fixedly installed on the top of the second valve telescopic rod 205 and the second valve spring 206. A second valve blocking block 208 is fixedly installed on the top of the sliding door rod 207. A first blocking slope 209 is provided on the outer side of the second valve blocking block 208. A second valve blocking ring 210 is fixedly installed on the auxiliary pipe 201 near the top of the second valve blocking block 208. A second blocking slope 211 is provided on the inner side of the bottom of the second valve blocking ring 210. The second valve telescopic rod 205 and the second valve spring 206 inside the auxiliary pipe 201 realize the lifting and lowering movement of the second valve sliding rod 207 and the second valve blocking block 208. When the first blocking slope 209 on the top of the second valve blocking block 208 is in contact with the second blocking slope 211 at the bottom of the second valve blocking ring 210, the auxiliary pipe 201 can be sealed, which can prevent the backflow of liquid.

[0021] Please see Figures 9-11 A top flange 212 is fixedly installed at the bottom of the auxiliary pipe 201. A bottom flange 213 is provided at the bottom of the top flange 212. Both the top flange 212 and the bottom flange 213 have sealing grooves 214 inside. A sealing ring 215 is provided inside the sealing groove 214. Both the top flange 212 and the bottom flange 213 are threadedly connected to fixing bolts 216. A mounting nut 217 is threadedly connected to the bottom outer side of the fixing bolts 216. The main pipe 218 is fixedly installed at the bottom of the bottom flange 213. By setting the top flange 212 and the bottom flange 213 and using the threaded connection of fixing bolts 216 and mounting nuts 217, the auxiliary pipe 201 and the main pipe 218 can be connected. The sealing ring 215 inside the top flange 212 and the bottom flange 213 improves the sealing performance of the connection between the auxiliary pipe 201 and the main pipe 218, which facilitates the disassembly and maintenance of the fracturing filter mechanism 1.

[0022] Working principle: Before using this drilling fracturing device for oilfield production enhancement, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 11As shown, firstly, the rotating motor 105 drives the rotating worm 106 to rotate. Utilizing the meshing connection between the rotating worm 106 and the rotating worm wheel 107, the rotating worm wheel 107 drives the rotating connecting ring 108 and the rotating base 109 to rotate. Simultaneously, the rotating base 109 drives the vortex cleaning impeller 110 and the top rotating ring 111 to rotate. This utilizes the structural characteristics of the vortex cleaning impeller 110; when the vortex cleaning impeller 110 rotates counterclockwise, the internal grooves of the vortex cleaning impeller 110 cause the temporary clogging agent to move towards the inner side of the filter cylinder 115, thereby improving the temporary clogging effect. The vortex cleaning impeller 110 can clean the outer surface of the filter cylinder 115, preventing impurities and dissolved temporary blockage agent from adhering to the surface of the filter cylinder 115, thus affecting the filtration effect of the filter cylinder 115. At the same time, the top rotating ring 111 drives the top connecting rod 113 and the spiral cleaning blade 117 to rotate. Utilizing the structural characteristics of the spiral cleaning blade 117, it can clean the inner wall of the first pipe 116, preventing a certain amount of dissolved temporary blockage agent from adhering to the inner wall of the first pipe 116, which would reduce the aperture of the first pipe 116 and thus affect the delivery efficiency of the temporary blockage agent.

[0023] Secondly, when it is necessary to clean impurities and dissolved temporary plugging agent, the chassis 109 and the vortex cleaning impeller 110 are rotated counterclockwise. Utilizing the structural characteristics of the vortex cleaning impeller 110, it can drive the drilling and fracturing fluid to move outward. Since the first valve sealing block 120 and the first valve sealing ring 121 are installed inside the first pipe 116, when the fluid flows backward, the first valve sealing block 120 and the first valve sealing ring 121 can be fitted together under the action of the support spring assembly 119. The connection is made so that the first pipe 116 is closed. Therefore, the liquid squeezes the sealing piston 133 at the end of the connecting bend 125. At the same time, the sealing piston 133 drives the first valve sleeve 132 to squeeze the first valve telescopic rod 130 and the first valve spring 131. When the sealing piston 133 separates from the one-way valve ring 126, impurities and liquid can enter the impurity collection box 122 through the connecting bend 125 for storage. The impurities and liquid inside the impurity collection box 122 can be discharged through the sewage pump 123 and the sewage pipe 124.

[0024] Finally, the second valve sliding rod 207 and the second valve blocking block 208 are moved up and down using the second valve telescopic rod 205 and the second valve spring 206 inside the auxiliary pipe 201. When the first blocking slope 209 at the top of the second valve blocking block 208 is in contact with the second blocking slope 211 at the bottom of the second valve blocking ring 210, the auxiliary pipe 201 can be sealed, preventing backflow of liquid. By setting the top flange 212 and the bottom flange 213 and using the threaded connection of the fixing bolts 216 and the mounting nuts 217, the auxiliary pipe 201 and the main pipe 218 can be connected. The sealing rings 215 inside the top flange 212 and the bottom flange 213 improve the sealing performance of the connection between the auxiliary pipe 201 and the main pipe 218, facilitating the disassembly and maintenance of the fracturing filter mechanism 1.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling fracturing device for oilfield production enhancement, comprising a fracturing filter mechanism (1) and a bottom rotating bearing (112) installed inside the fracturing filter mechanism (1). The bottom of the fracturing filter mechanism (1) is provided with a connecting sealing mechanism (2), and the bottom of the connecting sealing mechanism (2) is provided with a main pipe (218). Its features are, Also includes: The fracturing filter mechanism (1) includes a filter support (101), and a plurality of drain holes (102) are provided on the outer side of the filter support (101). A worm gear limiting cover (103) is fixedly installed at the bottom of the filter support (101). Among them, a rotating bracket (104) is symmetrically installed on the inner side of the filter bracket (101) near the worm gear limiting cover (103), and a rotating motor (105) is fixedly installed on the outer side of the rotating bracket (104). The output end of the rotating motor (105) is fixedly connected to a rotating worm (106), and a rotating worm wheel (107) is meshed with one side of the rotating worm (106). A rotating connecting ring (108) is fixedly installed inside the rotating worm gear (107). The rotating connecting ring (108) is rotatably connected to the filter bracket (101). A rotating base (109) is fixedly installed on the top of the rotating connecting ring (108). A plurality of vortex cleaning impellers (110) are fixedly installed on the top of the rotating base (109). A top rotating ring (111) is fixedly installed on the top of the vortex cleaning impellers (110). The bottom rotating bearing (112) is rotatably connected to the rotating chassis (109). Several top connecting rods (113) are fixedly installed on the top of the top rotating ring (111). A connecting turntable (114) is fixedly installed between the top connecting rods (113). A filter screen cylinder (115) is rotatably connected to the bottom of the connecting turntable (114). The rotating chassis (109) is rotatably connected to the bottom rotating bearing (112). The filter support (101) is fixedly installed with a first pipe (116) at the top, and a spiral cleaning blade (117) is fixedly installed with the top of the top connecting rod (113). The spiral cleaning blade (117) is in close contact with the inner wall of the first pipe (116). A valve support (118) is fixedly installed with the top of the first pipe (116) near the spiral cleaning blade (117). A support spring assembly (119) is fixedly installed at the top center of the valve support (118).

2. The drilling and fracturing device for oilfield production enhancement according to claim 1, characterized in that: A first valve plugging block (120) is fixedly installed on the top of the support spring assembly (119). A first valve plugging ring (121) is fixedly installed on the top of the first pipe (116) near the first valve plugging block (120). An impurity collection box (122) is fixedly installed on the outside of the first pipe (116). A sewage pump (123) is fixedly installed on one side of the top of the impurity collection box (122). A sewage pipe (124) is fixedly connected to the output end of the sewage pump (123). Several connecting bends (125) are fixedly installed at the bottom of the impurity collection box (122). A one-way valve ring (126) is fixedly installed at the end of the connecting bend (125).

3. The drilling and fracturing device for oilfield production enhancement according to claim 2, characterized in that: A plurality of first valve connecting rods (127) are fixedly installed on the side of the connecting bend (125) away from the one-way valve ring (126). A first valve fixing plate (128) is fixedly installed between the first valve connecting rods (127). A first valve sliding rod (129) is fixedly installed on one side of the first valve fixing plate (128). A first valve telescopic rod (130) is fixedly installed at the end of the first valve sliding rod (129). A first valve spring (131) is fixedly connected to the outside of the first valve sliding rod (129) near the first valve telescopic rod (130). A first valve sleeve (132) is fixedly installed on the outside of the first valve spring (131). A sealing piston (133) is fixedly installed on one side of the first valve sleeve (132). The sealing piston (133) is in close contact with the one-way valve ring (126).

4. The drilling and fracturing device for oilfield production enhancement according to claim 1, characterized in that: The connecting sealing mechanism (2) includes an auxiliary pipe (201), which is fixedly installed at the bottom of the filter screen cylinder (115). The auxiliary pipe (201) is fixedly connected to the worm gear limiting cover (103). Several second valve connecting rods (202) are fixedly installed inside the auxiliary pipe (201). A second valve fixing plate (203) is fixedly installed between the second valve connecting rods (202). A second valve sleeve (204) is fixedly installed at the top center of the second valve fixing plate (203). A second valve telescopic rod (205) is fixedly installed inside the second valve sleeve (204). A second valve spring (206) is fixedly installed on the outer side of the second valve sleeve (204) near the second valve telescopic rod (205).

5. A drilling fracturing device for oilfield production enhancement according to claim 4, characterized in that: A second valve sliding rod (207) is fixedly installed on the top of the second valve telescopic rod (205) and the second valve spring (206). A second valve sealing block (208) is fixedly installed on the top of the second valve sliding rod (207). A first sealing slope (209) is provided on the outer side of the second valve sealing block (208). A second valve sealing ring (210) is fixedly installed on the top of the auxiliary pipe (201) near the second valve sealing block (208). A second sealing slope (211) is provided on the inner side of the bottom of the second valve sealing ring (210).

6. A drilling fracturing device for oilfield production enhancement according to claim 5, characterized in that: The bottom of the auxiliary pipe (201) is fixedly installed with a top flange (212), and a bottom flange (213) is provided at the bottom of the top flange (212). Both the top flange (212) and the bottom flange (213) have a sealing groove (214) inside, and a sealing ring (215) is provided inside the sealing groove (214). Both the top flange (212) and the bottom flange (213) are threaded with fixing bolts (216), and the bottom outer side of the fixing bolts (216) is threaded with a mounting nut (217). The main pipe (218) is fixedly installed at the bottom of the bottom flange (213).

Images