A well drilling and fracturing apparatus for oil field stimulation

Abstract

The application discloses a drilling and fracturing device for oil field stimulation, and relates to the technical field of oil field collection. The device comprises a fracturing filtering mechanism, a bottom rotating bearing installed in the fracturing filtering mechanism, a connecting sealing mechanism arranged at the bottom of the fracturing filtering mechanism, and a main pipeline arranged at the bottom of the connecting sealing mechanism. The fracturing filtering mechanism comprises a filtering support, a plurality of blowdown 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 at the inner side of the filtering support close to the worm gear limiting cover, and rotating motors are fixedly installed at the outer side of the rotating supports. The structural characteristics of the vortex cleaning impeller are utilized. When the vortex cleaning impeller rotates counterclockwise, the temporary plugging agent can be moved to the inner side of the filter screen cylinder under the action of the inner groove of 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] The present application relates to the technical field of oilfield production, in particular to a drilling fracturing device for oilfield production increase. BACKGROUND

[0002] In the process of oil exploitation, not only one direction is exploited, but also multiple directions in the circumferential direction are exploited, that is, after the crude oil in the old fracture control area has been completely extracted, temporary plugging and repeated fracturing are implemented to open new layers in the longitudinal and planar directions and extract the crude oil outside the old fracture control area. The existing drilling fracturing device for oilfield production increase is mainly to connect pipes and fix a filter screen in the pipes. Since the filter screen is fixed in the pipes, the particles of the temporary plugging agent will be bonded on the filter screen after long-term use, thereby blocking the filter screen, which is not easy to clean for the staff, and affects the realization of opening new fractures and the turning of fractures by the temporary plugging agent, thereby affecting the exploitation of the oil well.

[0003] Publication No. CN213540365U discloses an oilfield production increase drilling fracturing device. Since the rotating hole and the rotating shaft are gap-fitted, the flap on the rotating rod can be turned around the rotating shaft. When the water flow in the main pipe backflows, the pressure in the pipe increases, so that the flap on the rotating rod can be tightly attached to the connecting plate, thereby avoiding backflow. When the filter screen is blocked by the temporary plugging agent, since the internal thread and the external thread are threadedly connected, the frame can be taken out from the fixed groove of the connecting plate by rotating the frame, so that the filter screen can be replaced, which is conducive to ensuring the fracturing effect of the fracturing device. By inserting the fixed pin into the fixed hole one of the flange plate one and the fixed hole two of the flange plate two, the protrusions on the sealing groove are inserted into the insertion slot of the sealing ring, the protrusions extrude the sealing ring, the sealing ring can be deformed, thereby the gap between the flange plate one and the flange plate two can be closed, and the sealing property of the device is improved. However, the patent still has the following problems in actual use:

[0004] Although the oilfield production increase drilling fracturing device can replace the filter screen when the filter screen is blocked by the temporary plugging agent, since the internal thread and the external thread are threadedly connected, the frame can be taken out from the fixed groove of the connecting plate by rotating the frame, so that the filter screen can be replaced, which is conducive to ensuring the fracturing effect of the fracturing device, when the temporary plugging agent is transported, the temporary plugging agent is slowly attached to the filter screen, so that the temporary plugging agent attached to the filter screen will be more and more with the transportation of the temporary plugging agent, thereby affecting the efficiency of the temporary plugging agent transportation, which is not conducive to the drilling fracturing of the oilfield production increase. Since the state of the filter screen cannot be monitored in real time, the time for cleaning the filter screen cannot be accurately grasped, the filter screen cannot be cleaned in time, and the transportation efficiency of the temporary plugging agent is affected, thereby affecting the effect of oil exploitation.

[0005] Therefore, a drilling fracturing device for oilfield production increase is proposed to solve the problems in the above. SUMMARY

[0006] The drilling and fracturing device for oil field production increase provided by the present application can solve the problem that the temporary plugging agent is slowly attached to the filter screen during the delivery of the temporary plugging agent, so that the temporary plugging agent attached to the filter screen is more and more with the delivery of the temporary plugging agent, thereby affecting the delivery efficiency of the temporary plugging agent, the drilling and fracturing for oil field production increase, and the oil production effect.

[0007] To achieve the above object, the present application provides the following technical scheme: a drilling and fracturing device for oil field production increase, comprising a fracturing filter mechanism and a bottom rotary bearing installed in the fracturing filter mechanism.

[0008] The bottom of the fracturing filter mechanism is provided with a connecting and sealing mechanism, and the bottom of the connecting and sealing mechanism is provided with a main pipeline.

[0009] Further comprising:

[0010] The fracturing filter mechanism comprises a filter support, a plurality of blowdown holes are formed in the outer side of the filter support, and a worm gear limiting cover is fixedly installed at the bottom of the filter support.

[0011] The inner side of the filter support close to the worm gear limiting cover is symmetrically provided with a rotary support, and a rotary motor is fixedly installed at the outer side of the rotary support.

[0012] The output end of the rotary motor is fixedly connected with a rotary worm, and the rotary worm is meshingly connected with a rotary worm gear on one side.

[0013] The rotary worm gear is fixedly installed in the inner side of the rotary worm gear, and the rotary worm gear is rotatably connected with the filter support.

[0014] The bottom rotary bearing is rotatably connected with the rotary base plate, a plurality of top connecting rods are fixedly installed at the top of the top rotary 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, and the rotary base plate is rotatably connected with the bottom rotary bearing.

[0015] The top of the filter support is fixedly installed with a first pipeline, the top of the top connecting rod is fixedly installed with a spiral cleaning blade, the spiral cleaning blade is connected with the inner wall of the first pipeline, the top of the first pipeline close to the spiral cleaning blade is fixedly installed with a valve support, and the top center of the valve support is fixedly installed with a supporting spring assembly.

[0016] Preferably, the top of the supporting spring assembly is fixedly installed with a first valve blocking block, the top of the first pipeline close to the first valve blocking block is fixedly installed with a first valve blocking ring, the outer side of the first pipeline is fixedly installed with a impurity collecting box, the top of the impurity collecting box is fixedly installed with a blowdown pump on one side, the output end of the blowdown pump is fixedly connected with a blowdown pipe, the bottom of the impurity collecting box is fixedly installed with a plurality of connecting elbow pipes, and the end of the connecting elbow pipe is fixedly installed with a one-way valve ring.

[0017] Preferably, the side of the connecting elbow pipe away from the one-way valve ring is fixedly installed with a plurality of first valve connecting rods, the first valve connecting rods are fixedly installed with a first valve fixing disc, the side of the first valve fixing disc is fixedly installed with a first valve sliding rod, the end of the first valve sliding rod is fixedly installed with a first valve telescopic rod, the outer side of the first valve sliding rod close to the first valve telescopic rod is fixedly connected with a first valve spring, the outer side of the first valve spring is fixedly installed with a first valve sleeve, the side of the first valve sleeve is fixedly installed with a blocking piston, and the blocking piston is connected with the one-way valve ring.

[0018] Preferably, the connecting sealing mechanism comprises an auxiliary pipeline, the auxiliary pipeline is fixedly installed at the bottom of the filter screen cylinder, the auxiliary pipeline is fixedly connected with the worm gear limiting cover, a plurality of second valve connecting rods are fixedly installed in the auxiliary pipeline, the second valve connecting rods are fixedly installed with a second valve fixing disc, the top center of the second valve fixing disc is fixedly installed with a second valve sleeve, the second valve sleeve is fixedly installed with a second valve telescopic rod in the inside, and the outer side of the second valve sleeve close to the second valve telescopic rod is fixedly installed with a second valve spring.

[0019] Preferably, the top of the second valve telescopic rod and the second valve spring is fixedly installed with a second valve sliding rod, the top of the second valve sliding rod is fixedly installed with a second valve blocking block, the outer side of the second valve blocking block is provided with a first blocking inclined surface, the top of the auxiliary pipeline close to the second valve blocking block is fixedly installed with a second valve blocking ring, and the bottom inner side of the second valve blocking ring is provided with a second blocking inclined surface.

[0020] Preferably, the bottom of the auxiliary pipeline is fixedly provided with a top flange plate, the bottom of the top flange plate is provided with a bottom flange plate, the inside of the top flange plate and the bottom flange plate is provided with a sealing groove, the inside of the sealing groove is provided with a sealing ring, the inside of the top flange plate and the bottom flange plate is screw-connected with a fixing bolt, the bottom outer side of the fixing bolt is screw-connected with a mounting nut, and the main pipeline is fixedly installed at the bottom of the bottom flange plate.

[0021] Compared with the prior art, the device has the advantages that: the device for well drilling and fracturing for oil field production increase utilizes the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates counterclockwise, under the action of the inner groove of the vortex cleaning impeller, the temporary plugging agent can move to the inner side of the filter screen cylinder, thereby improving the conveying efficiency of the temporary plugging agent, meanwhile, the vortex cleaning impeller can clean the outer surface of the filter screen cylinder, avoiding the adhesion of impurities and dissolved temporary plugging agent on the surface of the filter screen cylinder, thereby affecting the filtering effect of the filter screen cylinder, meanwhile, the top rotating ring drives the top connecting rod and the spiral cleaning blade to rotate, utilizing the structural characteristics of the spiral cleaning blade, the inner wall of the first pipeline can be cleaned, avoiding the adhesion of a certain amount of dissolved temporary plugging agent on the inner wall of the first pipeline, thereby reducing the aperture of the first pipeline, thereby affecting the conveying efficiency of the temporary plugging agent, utilizing the telescopic rod and the spring of the second valve in the auxiliary pipeline to realize the lifting movement of the sliding rod and the blocking block of the second valve, when the first blocking inclined surface at the top of the second valve blocking block is connected with the second blocking inclined surface at the bottom of the second valve blocking ring, the auxiliary pipeline can be closed, avoiding the reverse flow of the liquid, and the specific contents are as follows:

[0022] 1. By setting the fracturing filtering mechanism not only can use the rotating motor to drive the rotating worm to rotate, use the meshing connection characteristics between the rotating worm and the rotating worm wheel, make the rotating worm wheel drive the rotating connecting ring and the rotating chassis to rotate, at the same time the rotating chassis drives the vortex cleaning impeller and the top rotating ring to rotate, not only can use the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates counterclockwise, under the action of the internal groove of the vortex cleaning impeller, can make the temporary plugging agent move to the inside of the filter screen cylinder, thereby improving the conveying efficiency of the temporary plugging agent, at the same time the vortex cleaning impeller can clean the outer surface of the filter screen cylinder, avoid the surface of the filter screen cylinder adhering impurities and dissolved temporary plugging agent, thereby affecting the filtering effect of the filter screen cylinder, at the same time the top rotating ring drives the top connecting rod and the spiral cleaning leaf to rotate, use the structural characteristics of the spiral cleaning leaf, can clean the inner wall of the first pipeline, avoid the inner wall of the first pipeline adhering a certain amount of dissolved temporary plugging agent, thereby causing the first pipeline aperture to decrease, thereby affecting the conveying efficiency of the temporary plugging agent, when it is needed to clean the impurities and dissolved temporary plugging agent, rotate the rotating chassis and the vortex cleaning impeller counterclockwise, use the structural characteristics of the vortex cleaning impeller, can make the vortex cleaning impeller drive the drilling and fracturing liquid to move to the outside, since the first pipeline is internally provided with the first valve blocking block and the first valve blocking ring, when the liquid flows backward, under the action of the supporting spring assembly, can realize the abutting connection of the first valve blocking block and the first valve blocking ring, thereby realizing the closure of the first pipeline, therefore the liquid extrudes the blocking piston at the end of the connecting elbow, at the same time the blocking piston drives the first valve sleeve to extrude the first valve telescopic rod and the first valve spring, when the blocking piston is separated from the one-way valve ring, the impurities and liquid can enter the impurity collection tank through the connecting elbow for storage, the impurities and liquid inside the impurity collection tank can be discharged through the blowdown pump and the blowdown pipe;

[0023] 2. By setting the connecting sealing mechanism not only can use the second valve telescopic rod and the second valve spring inside the auxiliary pipeline to realize the lifting movement of the second valve sliding rod and the second valve blocking block, when the first blocking inclined surface at the top of the second valve blocking block abuts with the second blocking inclined surface at the bottom of the second valve blocking ring, can realize the closure of the auxiliary pipeline, can avoid the phenomenon of liquid backflow, by setting the top flange plate and the bottom flange plate and using the threaded connection characteristics of the fixing bolts and the mounting nuts, can realize the connection of the auxiliary pipeline and the main pipeline, use the sealing ring inside the top flange plate and the bottom flange plate to improve the sealing performance of the auxiliary pipeline and the main pipeline connection, facilitate the disassembly and repair of the fracturing filtering mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the overall three-dimensional structure schematic diagram of the application;

[0025] Figure 2 It is the three-dimensional structure schematic diagram of the fracturing filtering mechanism in the application;

[0026] Figure 3 The first pipeline profile three-dimensional structure schematic diagram in the application;

[0027] Figure 4 The filter support profile three-dimensional structure schematic diagram in the application;

[0028] Figure 5 The worm gear limit cover profile three-dimensional structure schematic diagram in the application;

[0029] Figure 6 The rotating chassis and vortex cleaning impeller three-dimensional structure schematic diagram in the application;

[0030] Figure 7 The impurity collection box profile three-dimensional structure schematic diagram in the application;

[0031] Figure 8 The connecting elbow pipe and first valve sleeve profile three-dimensional structure schematic diagram in the application;

[0032] Figure 9 The connecting sealing mechanism profile three-dimensional structure schematic diagram in the application;

[0033] Figure 10 The second valve sleeve and second valve sealing ring profile three-dimensional structure schematic diagram in the application;

[0034] Figure 11 The top flange plate profile three-dimensional structure schematic diagram in the application.

[0035] In the figure: 1, fracturing filter mechanism; 101, filter support; 102, blowhole; 103, worm 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 pipeline; 117, spiral cleaning blade; 118, valve support; 119, support spring assembly; 120, first valve blocking block; 121, first valve blocking ring; 122, impurity collection box; 123, blow pump; 124, blow pipe; 125, connecting elbow; 126, one-way valve ring; 127, first valve connecting rod; 128, first valve fixed disc; 129, first valve sliding rod; 130, first valve telescopic rod; 131, first valve spring; 132, first valve sleeve; 133, blocking piston; 2, connecting sealing mechanism; 201, auxiliary pipeline; 202, second valve connecting rod; 203, second valve fixed disc; 204, second valve sleeve; 205, second valve telescopic rod; 206, second valve spring; 207, second valve sliding rod; 208, second valve blocking block; 209, first blocking slope; 210, second valve blocking ring; 211, second blocking slope; 212, top flange plate; 213, bottom flange plate; 214, sealing groove; 215, sealing ring; 216, fixing bolt; 217, mounting nut; 218, main pipeline. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] Please refer to Figures 1-6The application provides the technical scheme: a drilling and fracturing device for oil field yield increase, which comprises a fracturing filtering mechanism 1 and a bottom rotating bearing 112 installed in the fracturing filtering mechanism 1, the bottom of the fracturing filtering mechanism 1 is provided with a connecting and sealing mechanism 2, the bottom of the connecting and sealing mechanism 2 is provided with a main pipeline 218, the fracturing filtering mechanism 1 comprises a filtering support 101, a plurality of blowholes 102 are formed in the outer side of the filtering support 101, and a worm gear limiting cover 103 is fixedly installed at the bottom of the filtering support 101, wherein a rotating support 104 is symmetrically installed at the inner side of the filtering support 101 close to the worm gear limiting cover 103, a rotating motor 105 is fixedly installed at the outer side of the rotating support 104, the output end of the rotating motor 105 is fixedly connected with a rotating worm 106, the rotating worm 106 is meshedly connected with a rotating worm gear 107 on one side, the rotating worm gear 107 is fixedly installed with a rotating connecting ring 108 in the inside, the rotating connecting ring 108 is rotationally connected with the filtering support 101, a rotating chassis 109 is fixedly installed at the top of the rotating connecting ring 108, a plurality of vortex cleaning impellers 110 are fixedly installed at the top of the rotating chassis 109, a top rotating ring 111 is fixedly installed at the top of the vortex cleaning impeller 110, the bottom rotating bearing 112 is rotationally connected with the rotating chassis 109, a plurality of top connecting rods 113 are fixedly installed at the top of the top rotating ring 111, a connecting turntable 114 is fixedly installed between the top connecting rods 113, a filtering screen cylinder 115 is rotationally connected at the bottom of the connecting turntable 114, the rotating motor 105 is used for driving the rotating worm 106 to rotate, the rotating worm 106 and the rotating worm gear 107 are meshedly connected, the rotating worm gear 107 drives the rotating connecting ring 108 and the rotating chassis 109 to rotate, the rotating chassis 109 drives the vortex cleaning impeller 110 and the top rotating ring 111 to rotate, the vortex cleaning impeller 110 is used for moving the temporary plugging agent to the inside of the filtering screen cylinder 115 under the action of the groove in the vortex cleaning impeller 110 when the vortex cleaning impeller 110 rotates counterclockwise, and the conveying efficiency of the temporary plugging agent is improved.

[0038] Please refer to Figures 3-6, the bottom rotating shaft bearing 112, the top of the first pipeline 116 is fixedly installed on the filter support 101, the top of the top connecting rod 113 is fixedly installed with the spiral cleaning blade 117, the spiral cleaning blade 117 is connected with the inner wall of the first pipeline 116, the vortex cleaning impeller 110 can clean the outer surface of the filter screen cylinder 115, avoid the surface of the filter screen cylinder 115 adhering impurities and dissolved temporary plugging agent, thereby affecting the filtering effect of the filter screen 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, by the structural characteristics of the spiral cleaning blade 117, the inner wall of the first pipeline 116 can be cleaned, avoid the inner wall of the first pipeline 116 adhering a certain amount of dissolved temporary plugging agent, thereby causing the first pipeline 116 aperture to be reduced, thereby affecting the conveying efficiency of the temporary plugging agent.

[0039] Please refer to Figures 3-8, the first pipeline 116 is fixedly installed with a valve support 118 near the top of the spiral cleaning blade 117, the top center of the valve support 118 is fixedly installed with a supporting spring assembly 119, the top of the supporting spring assembly 119 is fixedly installed with a first valve blocking piece 120, the first pipeline 116 is fixedly installed with a first valve blocking ring 121 near the top of the first valve blocking piece 120, the outer side of the first pipeline 116 is fixedly installed with a impurity collection box 122, the top side of the impurity collection box 122 is fixedly installed with a blowdown pump 123, the output end of the blowdown pump 123 is fixedly connected with a blowdown pipe 124, the bottom of the impurity collection box 122 is fixedly installed with a plurality of connecting elbow pipes 125, the end of the connecting elbow pipe 125 is fixedly installed with a one-way valve ring 126, the side of the connecting elbow pipe 125 away from the one-way valve ring 126 is fixedly installed with a plurality of first valve connecting rods 127, the first valve connecting rods 127 are fixedly installed with a first valve fixing disc 128, the side of the first valve fixing disc 128 is fixedly installed with a first valve sliding rod 129, the end of the first valve sliding rod 129 is fixedly installed with a first valve telescopic rod 130, the outer side of the first valve sliding rod 129 close to the first valve telescopic rod 130 is fixedly connected with a first valve spring 131, the outer side of the first valve spring 131 is fixedly installed with a first valve sleeve 132, the side of the first valve sleeve 132 is fixedly installed with a blocking piston 133, the blocking piston 133 is connected with the one-way valve ring 126, when it is necessary to clean the impurities and the melted temporary plugging agent, the rotating base plate 109 and the vortex cleaning impeller 110 are counterclockwise rotated, the vortex cleaning impeller 110 can drive the drilling and fracturing liquid to move outward due to the structural characteristics of the vortex cleaning impeller 110, when the liquid flows backward, the first valve blocking piece 120 and the first valve blocking ring 121 can be connected under the action of the supporting spring assembly 119, so that the first pipeline 116 is closed, therefore the liquid extrudes the blocking piston 133 at the end of the connecting elbow pipe 125, at the same time, the blocking piston 133 drives the first valve sleeve 132 to extrude the first valve telescopic rod 130 and the first valve spring 131, when the blocking piston 133 is separated from the one-way valve ring 126, the impurities and the liquid can enter the impurity collection box 122 through the connecting elbow pipe 125 for storage, the impurities and the liquid in the impurity collection box 122 can be discharged through the blowdown pump 123 and the blowdown pipe 124.

[0040] Please refer to Figure 1 、 Figures 9-10The connecting sealing mechanism 2 comprises an auxiliary pipeline 201 fixedly installed at the bottom of the filter screen cylinder 115, the auxiliary pipeline 201 is fixedly connected with the worm gear limiting cover 103, a plurality of second valve connecting rods 202 are fixedly installed inside the auxiliary pipeline 201, a second valve fixing disc 203 is fixedly installed between the second valve connecting rods 202, a second valve sleeve 204 is fixedly installed at the top center position of the second valve fixing disc 203, a second valve telescopic rod 205 is fixedly installed inside the second valve sleeve 204, a second valve spring 206 is fixedly installed outside the second valve sleeve 204 close to the second valve telescopic rod 205, a second valve sliding rod 207 is fixedly installed at the top of the second valve telescopic rod 205 and the second valve spring 206, a second valve plugging block 208 is fixedly installed at the top of the second valve sliding rod 207, a first plugging inclined surface 209 is formed at the outer side of the second valve plugging block 208, a second valve plugging ring 210 is fixedly installed at the top of the auxiliary pipeline 201 close to the second valve plugging block 208, a second plugging inclined surface 211 is formed at the bottom inner side of the second valve plugging ring 210, the second valve sliding rod 207 and the second valve plugging block 208 are lifted and moved by the second valve telescopic rod 205 and the second valve spring 206 inside the auxiliary pipeline 201, when the first plugging inclined surface 209 at the top of the second valve plugging block 208 is connected with the second plugging inclined surface 211 at the bottom of the second valve plugging ring 210, the auxiliary pipeline 201 can be closed, and the phenomenon of liquid backflow can be avoided.

[0041] Please refer to Figures 9-11 A top flange plate 212 is fixedly installed at the bottom of the auxiliary pipeline 201, a bottom flange plate 213 is arranged at the bottom of the top flange plate 212, a sealing groove 214 is formed in the inside of the top flange plate 212 and the bottom flange plate 213, a sealing ring 215 is arranged in the inside of the sealing groove 214, a fixing bolt 216 is threadedly connected in the inside of the top flange plate 212 and the bottom flange plate 213, an installation nut 217 is threadedly connected at the bottom outer side of the fixing bolt 216, and a main pipeline 218 is fixedly installed at the bottom of the bottom flange plate 213. By arranging the top flange plate 212 and the bottom flange plate 213 and threadedly connecting the fixing bolt 216 and the installation nut 217, the auxiliary pipeline 201 and the main pipeline 218 can be connected, the sealing performance of the connection between the auxiliary pipeline 201 and the main pipeline 218 is improved by the sealing ring 215 in the inside of the top flange plate 212 and the bottom flange plate 213, and the hydraulic fracturing filter mechanism 1 is convenient to disassemble and maintain.

[0042] Working principle: Before using the drilling fracturing device for oil field stimulation, the overall condition of the device needs to be checked to determine whether it can work normally, according to Figure 1 - Figure 11As shown, first, the rotating motor 105 drives the rotating worm 106 to rotate, and the rotating worm 106 and the rotating worm gear 107 are connected by meshing, so that the rotating worm gear 107 drives the rotating connecting ring 108 and the rotating chassis 109 to rotate, and the rotating chassis 109 drives the vortex cleaning impeller 110 and the top rotating ring 111 to rotate. Not only can the vortex cleaning impeller 110 rotate counterclockwise, but also the vortex cleaning impeller 110 can move the temporary plugging agent to the inside of the filter screen cylinder 115 under the action of the groove in the vortex cleaning impeller 110, thereby improving the conveying efficiency of the temporary plugging agent, and the vortex cleaning impeller 110 can clean the outer surface of the filter screen cylinder 115, avoiding the adhesion of impurities and dissolved temporary plugging agent on the surface of the filter screen cylinder 115, thereby affecting the filtering effect of the filter screen cylinder 115. At the same time, the top rotating ring 111 drives the top connecting rod 113 and the spiral cleaning leaf 117 to rotate, and the structure of the spiral cleaning leaf 117 can clean the inner wall of the first pipeline 116, avoiding the adhesion of a certain amount of dissolved temporary plugging agent on the inner wall of the first pipeline 116, thereby reducing the aperture of the first pipeline 116 and affecting the conveying efficiency of the temporary plugging agent.

[0043] Secondly, when it is necessary to clean impurities and dissolved temporary plugging agent, the rotating chassis 109 and the vortex cleaning impeller 110 are rotated counterclockwise, and the structure of the vortex cleaning impeller 110 can drive the drilling and fracturing liquid to move outward. Since the first pipeline 116 is internally provided with the first valve blocking block 120 and the first valve blocking ring 121, the first valve blocking block 120 and the first valve blocking ring 121 can be connected by the support spring assembly 119 when the liquid flows backward, thereby achieving the closure of the first pipeline 116. Therefore, the liquid extrudes the blocking piston 133 at the end of the connecting elbow pipe 125, and the blocking piston 133 drives the first valve sleeve 132 to extrude the first valve telescopic rod 130 and the first valve spring 131. When the blocking piston 133 is separated from the one-way valve ring 126, impurities and liquid can enter the impurity collection tank 122 for storage through the connecting elbow pipe 125. The impurities and liquid in the impurity collection tank 122 can be discharged through the blowdown pump 123 and the blowdown pipe 124.

[0044] Finally, the second valve sliding rod 207 and the second valve blocking block 208 are lifted and lowered by the second valve telescopic rod 205 and the second valve spring 206 inside the auxiliary pipeline 201, when the first blocking inclined surface 209 at the top of the second valve blocking block 208 is connected with the second blocking inclined surface 211 at the bottom of the second valve blocking ring 210, the auxiliary pipeline 201 can be closed, the phenomenon of liquid backflow can be avoided, the top flange plate 212 and the bottom flange plate 213 are provided and are threadedly connected by the fixing bolt 216 and the mounting nut 217, the auxiliary pipeline 201 and the main pipeline 218 can be connected, the sealing ring 215 inside the top flange plate 212 and the bottom flange plate 213 is used to improve the sealing performance of the connection between the auxiliary pipeline 201 and the main pipeline 218, and the fracturing filtering mechanism 1 is convenient to disassemble and maintain.

[0045] Although the present application has been described in detail with reference to the foregoing embodiments, technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced by equivalent features by those skilled in the art, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drilling and fracturing device for oil field stimulation, comprising a fracturing filtering mechanism (1) and a bottom rotary bearing (112) installed inside the fracturing filtering mechanism (1); The bottom of the fracturing filtering mechanism (1) is provided with a connecting sealing mechanism (2), and the bottom of the connecting sealing mechanism (2) is provided with a main pipeline (218); characterized in that Further comprising: The fracturing filtering mechanism (1) comprises a filtering support (101), a plurality of blowholes (102) are formed on the outer side of the filtering support (101), and a worm gear limiting cover (103) is fixedly installed at the bottom of the filtering support (101); Wherein, the rotating support (104) is symmetrically installed on the inner side of the worm gear limiting cover (103) close to the filtering support (101), and the rotating motor (105) is fixedly installed on the outer side of the rotating support (104); Wherein, the output end of the rotating motor (105) is fixedly connected with a rotating worm (106), and the rotating worm (106) is meshingly connected with a rotating worm gear (107) on one side; The rotating connecting ring (108) is fixedly installed in the rotating worm gear (107), the rotating connecting ring (108) is rotatably connected with the filtering support (101), the rotating base plate (109) is fixedly installed at the top of the rotating connecting ring (108), a plurality of vortex cleaning impellers (110) are fixedly installed at the top of the rotating base plate (109), and a top rotating ring (111) is fixedly installed at the top of the vortex cleaning impeller (110); The bottom rotary bearing (112) is rotatably connected with the rotating base plate (109), a plurality of top connecting rods (113) are fixedly installed at 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 at the bottom of the connecting turntable (114), and the rotating base plate (109) is rotatably connected with the bottom rotary bearing (112); The first pipeline (116) is fixedly installed at the top of the filtering support (101), the spiral cleaning blade (117) is fixedly installed at the top of the top connecting rod (113), the spiral cleaning blade (117) is attached to the inner wall of the first pipeline (116), the valve support (118) is fixedly installed at the top of the first pipeline (116) close to the spiral cleaning blade (117), and the support spring assembly (119) is fixedly installed at the top center position of the valve support (118).

2. The drilling and fracturing apparatus for oil field stimulation of claim 1, wherein: The top of the support spring assembly (119) is fixedly installed with a first valve blocking block (120), the first pipeline (116) is fixedly installed with a first valve blocking ring (121) near the top of the first valve blocking block (120), the outer side of the first pipeline (116) is fixedly installed with a impurity collecting box (122), the top of the impurity collecting box (122) is fixedly installed with a blowdown pump (123) on one side, the output end of the blowdown pump (123) is fixedly connected with a blowdown pipe (124), the bottom of the impurity collecting box (122) is fixedly installed with a plurality of connecting elbows (125), and the end of the connecting elbow (125) is fixedly installed with a one-way valve ring (126).

3. A drilling and fracturing apparatus for oil field stimulation according to claim 2, characterized in that: The side, away from the one-way valve ring (126), of the connecting elbow (125) is fixedly installed with a plurality of first valve connecting rods (127), the first valve connecting rods (127) are fixedly installed with a first valve fixing disc (128) therebetween, the first valve fixing disc (128) is fixedly installed with a first valve sliding rod (129) on one side, the end of the first valve sliding rod (129) is fixedly installed with a first valve telescopic rod (130), the outer side of the first valve sliding rod (129) is fixedly connected with a first valve spring (131) near the first valve telescopic rod (130), the outer side of the first valve spring (131) is fixedly installed with a first valve sleeve (132), the one side of the first valve sleeve (132) is fixedly installed with a blocking piston (133), and the blocking piston (133) is connected with the one-way valve ring (126) in close contact.

4. The drilling and fracturing apparatus for oil field stimulation of claim 1, wherein: The connecting sealing mechanism (2) comprises an auxiliary pipeline (201), the auxiliary pipeline (201) is fixedly installed at the bottom of the filter screen cylinder (115), the auxiliary pipeline (201) is fixedly connected with the worm gear limiting cover (103), a plurality of second valve connecting rods (202) are fixedly installed in the auxiliary pipeline (201), the second valve connecting rods (202) are fixedly installed with a second valve fixing disc (203) therebetween, a second valve sleeve (204) is fixedly installed at the top center position of the second valve fixing disc (203), a second valve telescopic rod (205) is fixedly installed in the second valve sleeve (204), and 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 well drilling and fracturing apparatus for use in oil field stimulation according to claim 4, characterized in that: The top of the second valve telescopic rod (205) and the second valve spring (206) is fixedly installed with a second valve sliding rod (207), the top of the second valve sliding rod (207) is fixedly installed with a second valve blocking block (208), a first blocking inclined surface (209) is formed in the outer side of the second valve blocking block (208), a second valve blocking ring (210) is fixedly installed at the top of the auxiliary pipeline (201) near the second valve blocking block (208), and a second blocking inclined surface (211) is formed in the inner side of the bottom of the second valve blocking ring (210).

6. A well fracturing device for oil field stimulation as claimed in claim 5, characterized in that: The bottom of the auxiliary pipeline (201) is fixedly installed with a top flange plate (212), the bottom of the top flange plate (212) is provided with a bottom flange plate (213), the inside of the top flange plate (212) and the bottom flange plate (213) is respectively provided with a sealing groove (214), the inside of the sealing groove (214) is provided with a sealing ring (215), the inside of the top flange plate (212) and the bottom flange plate (213) is respectively threadedly connected with a fixing bolt (216), the bottom outer side of the fixing bolt (216) is threadedly connected with a mounting nut (217), and the main pipeline (218) is fixedly installed at the bottom of the bottom flange plate (213).

Images