On-line continuous mixing skid-mounted equipment for nano injection in oil field

Abstract

The invention belongs to the technical field of oil field nano-injection equipment, and particularly relates to oil field nano-injection online continuous mixing skid-mounted equipment which comprises a container, and mixing equipment is arranged on the container; the mixing equipment is connected with a temporary storage tank, the temporary storage tank is connected with a main pipeline, and the main pipeline is connected with a plurality of groups of injection pipelines; the mixing equipment comprises a mixing tank mounted in the container, and a stirring device is arranged on the mixing tank; a filtering device communicated with the mixing tank is arranged at the top of the mixing tank, and a circulating device for driving a solution at the bottom of the mixing tank to flow to the filtering device is arranged on the mixing tank; the device effectively solves the problem that fish eyes and bubbles are easy to generate in the fracturing fluid preparation process of the existing oilfield nano-injection online continuous mixing skid-mounted equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield nano-injection equipment, and in particular relates to an oilfield nano-injection online continuous mixing skid-mounted equipment. Background Art

[0002] Oilfield nano-injection online continuous mixing skid-mounted equipment, integrating modular design with nanotechnology, is reshaping the technological landscape of underwater oil and gas production. From deepwater oil and gas exploration to shale oil development, and from precision control to environmentally friendly treatment, its application not only improves extraction efficiency and economic benefits but also provides a sustainable technological path for marine energy development. In the future, with the coordinated breakthroughs of materials science, intelligent manufacturing, and digital technology, nano-skid-mounted equipment is expected to become a core component of deepwater energy development, driving the global oil and gas industry towards a more efficient and greener direction.

[0003] When the oilfield nano-injection online continuous mixing skid-mounted equipment is in use, the fracturing fluid is prepared through the mixing equipment; however, when the existing mixing equipment is in use, the solution is mostly stirred by a simple stirring paddle, resulting in insufficient dissolution of the fracturing fluid and the easy generation of "fish eyes" (undissolved polymer clumps) and bubbles. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides an oilfield nano-injection online continuous mixing skid-mounted equipment, which effectively solves the problem of fish eyes and bubbles easily generated in the process of preparing fracturing fluid by the existing oilfield nano-injection online continuous mixing skid-mounted equipment.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an online continuous mixing skid-mounted equipment for nano-injection in oil fields, comprising a container, on which a mixing equipment is provided; the mixing equipment is connected to a temporary storage tank, which is connected to a main pipeline, which is connected to multiple groups of injection pipelines; the mixing equipment includes a mixing tank installed in the container, on which a stirring device is provided; a filtering device connected to the mixing tank is provided on the top of the mixing tank, and a circulation device is provided on the mixing tank to drive the solution at the bottom of the mixing tank to flow to the filtering device.

[0006] Furthermore, multiple groups of injection pipes are provided with injection pumps, and the injection pipes are connected to sampling pipes arranged between the injection pumps and the main pipe; valves are provided on the sampling pipes, and the injection pipes are also provided with valves arranged on both sides of the sampling pipes; valves, safety valves, pressure transmitters, and check valves are provided on the injection pipes in sequence, and the valves, safety valves, pressure transmitters, and check valves are arranged on the side of the injection pump away from the sampling pipe.

[0007] Furthermore, the stirring device includes a stirring shaft rotatably connected to the mixing tank, and an internal stirring paddle is provided on the stirring shaft; the mixing tank is also rotatably connected to a stirring drum that rotates with the stirring shaft, and an external stirring frame is fixedly connected to the stirring drum, and the external stirring frame is fixedly connected to an external stirring paddle that is spaced apart from the inner stirring paddle from top to bottom.

[0008] Furthermore, a stirring motor is fixedly connected to the mixing tank, and the output end of the stirring motor is fixedly connected to the stirring shaft; a driving wheel is fixedly connected to the stirring shaft, and an upper idler wheel is engaged with the driving wheel; the upper idler wheel is coaxially fixedly connected to a lower idler wheel, and the lower idler wheel is engaged with a driven wheel fixed to the stirring drum.

[0009] Furthermore, the circulation device includes a discharge pipe connected to the mixing tank, the discharge pipe is connected to the temporary storage tank, and a valve is provided on the discharge pipe; the mixing tank is connected to a circulation pump, and the circulation pump is connected to a lower circulation pipe connected to the discharge pipe; the circulation pump is also connected to an upper circulation pipe corresponding to the lower circulation pipe, and the upper circulation pipe is connected to the filtering device.

[0010] Furthermore, the filtering device is fixedly connected to the mixing tank, and a number of fixed nets are evenly distributed along the circumference of the fixed cylinder; a rotating frame is rotatably connected to the fixed cylinder, and a number of movable nets cooperating with the fixed nets are evenly distributed on the rotating frame, and the movable nets and the fixed nets are arranged at intervals along the circumference; a frustum-shaped guide plate provided below the movable net is fixedly connected to the fixed cylinder, and the guide plate is fixedly connected to the fixed net; a rotating cylinder rotatably connected to the mixing tank is provided on the outer periphery of the rotating frame, and filter holes corresponding to the movable nets and the fixed nets are provided on the rotating cylinder; a support plate is fixedly connected to the outer periphery of the guide plate, and the support plate is evenly distributed with through holes corresponding to the filter holes and the mixing tank.

[0011] Furthermore, the circulation device is connected to an annular tube, and a plurality of input tubes connected to the fixed cylinder are evenly distributed along the circumference of the annular tube, and the rotating frame is evenly distributed along the circumference with communication holes corresponding to the input tubes.

[0012] Furthermore, a rotating chamber is intermittently rotated in the mixing tank, and a plurality of fan-shaped blocks are connected to the rotating chamber in a circumferential sliding manner; a plurality of the fan-shaped blocks are fixedly connected to a connecting column, and a plurality of the connecting columns are fixedly connected to the rotating frame; a slide rail is fixedly connected to the rotating chamber, and a plurality of the fan-shaped blocks are slidably connected to the slide rail; a plurality of the fan-shaped blocks are provided with fan-shaped springs mounted on the slide rails on both sides, and a force-bearing seat provided at the other end of the fan-shaped spring is fixedly connected to the rotating chamber.

[0013] Furthermore, a driving motor is fixedly connected to the mixing tank, an output end of the driving motor is connected to an input wheel, and a gear ring meshing with the input wheel is fixedly connected to the rotating cylinder.

[0014] Furthermore, the input wheel engages with the output wheel, a shift rod is fixedly connected to the output wheel, and a groove wheel corresponding to the shift rod is rotatably connected to the mixing tank; the groove wheel is coaxially fixed with a crank, a connecting rod is rotatably connected to the crank, and the connecting rod is rotatably connected to the rotating chamber. The crank, connecting rod, and rotating chamber constitute a crank rocker mechanism.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are: 1. When the present invention is in use, a temporary storage tank is used in conjunction with a mixing device. The temporary storage tank is responsible for storing the fracturing fluid, and the mixing device is responsible for mixing the fracturing fluid. The mixed fracturing fluid flows into the temporary storage tank, so that the fracturing fluid can be continuously injected into the wellhead during the injection process; in addition, by setting up multiple groups of injection pipelines, the present application can simultaneously prepare fracturing fluid for multiple oil wells.

[0016] 2. When the present invention is in use, the fracturing fluid in the mixing tank is stirred and mixed by the stirring device, and the solution at the bottom of the mixing tank is driven to flow to the filtering device at the top of the mixing tank by the circulation device. The fracturing fluid is filtered and squeezed by the filtering device to eliminate fish eyes and bubbles in the fracturing fluid and improve the quality of the fracturing fluid.

[0017] 3. When in use, the present invention uses the movable net and the fixed net to squeeze and filter the fracturing fluid, so that the fish eyes and bubbles in the fracturing fluid are broken and re-mixed into the fracturing fluid, thereby improving the quality of the fracturing fluid; in addition, the intermittently rotating rotating chamber, rotating frame, fan-shaped spring, etc. are used to drive the movable net to rotate intermittently, and vibrate in the circumferential direction after the intermittent rotation, so as to improve the movable net's effect of breaking fish eyes and bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the mixing equipment in the present invention; Figure 3 Schematic diagram of the internal structure of the mixing tank in the present invention; Figure 4 Schematic diagram of the structure of the stirring device in the present invention; Figure 5 Schematic diagram of the structure of the filtering device of the present invention; Figure 6 This is a schematic diagram of the coordination of the rotating chamber, fixed cylinder, movable net, fixed net and other structures in the present invention; Figure 7 This is a schematic diagram of the coordination of the rotating chamber, movable net, rotating frame, fan-shaped spring, crank, connecting rod and other structures in the present invention; Figure 8 This is a schematic diagram of the coordination of the fixed cylinder, fixed net, guide plate, annular tube and other structures in the present invention; In the figure: 1. Mixing equipment, 2. Temporary storage tank, 3. Main pipeline, 4. Injection pipeline, 5. Sampling pipeline, 6. Injection pump, 7. Controller, 8. Mixing tank, 9. External stirring frame, 10. External stirring paddle, 11. Discharge pipe, 12. Lower circulation pipe, 13. Circulation pump, 14. Stirring shaft, 15. Internal stirring paddle, 16. Stirring drum, 17. Fixed drum, 18. Stirring motor, 19. Drive motor, 20. Upper circulation pipe, 21. Rotating drum, 22. Filter hole, 23. Driving wheel, 24. Driven wheel, 25. Upper idler wheel, 26. Lower idler wheel, 27. Rotating chamber, 28. Annular tube, 29. Input wheel, 30. Output wheel, 31. Shift lever, 32. Grooved wheel, 33. Rotating frame, 34. Guide plate, 35. Movable net, 36. Fixed net, 37. Support plate, 38. Fan-shaped block, 39. Fan-shaped spring, 40. Connecting column, 41. Connecting hole, 42. Crank, 43. Connecting rod. DETAILED DESCRIPTION

[0019] An oilfield nano injection online continuous mixing skid-mounted equipment, such as Figure 1-8 As shown, it includes a container, on which a mixing device 1 is provided; the mixing device 1 is connected to a temporary storage tank 2, the temporary storage tank 2 is connected to a main pipeline 3, and the main pipeline 3 is connected to multiple groups of injection pipelines 4; multiple groups of injection pipelines 4 are provided with injection pumps 6, and the injection pipeline 4 is connected to a sampling pipeline 5 arranged between the injection pump 6 and the main pipeline 3; the sampling pipeline 5 is provided with a valve, and the injection pipeline 4 is also provided with valves arranged on both sides of the sampling pipeline 5; the injection pipeline 4 is provided with a valve, a safety valve, a pressure transmitter, and a check valve in sequence, and the valve, safety valve, pressure transmitter, and check valve are arranged on the side of the injection pump 6 away from the sampling pipeline 5; the valve in this application is preferably a ball valve; the safety valve is connected to a return pipeline connected to the mixing device 1, and the container is also provided with a controller 7 for controlling the mixing device 1, the injection pump 6, and the pressure transmitter.

[0020] When the present invention is in use, the fracturing fluid is mixed by the mixing device 1, and the mixed fracturing fluid flows into the temporary storage tank 2 for temporary storage; when injection is required, the corresponding injection pump 6 is started, and the injection pump 6 drives the fracturing fluid in the temporary storage tank 2 to flow into the injection pipe 4 through the injection pipe 4 and the main pipe 3, and the fracturing fluid in the injection pipe 4 is injected through the valve, the safety valve, the pressure transmitter, and the check valve; the temporary storage tank 2 is used in conjunction with the mixing device 1, the temporary storage tank 2 is responsible for storing the fracturing fluid, and the mixing device 1 is responsible for mixing the fracturing fluid, and the mixed fracturing fluid flows into the temporary storage tank 2, so that the fracturing fluid can be continuously injected into the wellhead during the injection process; in addition, by setting up multiple groups of injection pipes 4, the present application can simultaneously prepare fracturing fluid for multiple oil wells.

[0021] Furthermore, the mixing equipment 1 includes a mixing tank 8 installed in a container, the mixing tank 8 is provided with a stirring device, the mixing tank 8 is provided with a water injection pipe and a feeding pipe corresponding to the water injection pipe; the top of the mixing tank 8 is provided with a filtering device connected to the mixing tank 8, and the mixing tank 8 is provided with a circulation device that drives the solution at the bottom of the mixing tank 8 to flow to the filtering device.

[0022] When the mixing equipment 1 is in use, the fracturing fluid in the mixing tank 8 is stirred and mixed by the stirring device, and the solution at the bottom of the mixing tank 8 is driven to flow to the filtering device at the top of the mixing tank 8 by the circulation device, and the fracturing fluid is filtered and squeezed by the filtering device to eliminate fish eyes and bubbles in the fracturing fluid and improve the quality of the fracturing fluid; in addition, the solution at the bottom of the mixing tank 8 is driven to flow to the filtering device at the top of the mixing tank 8 by the circulation device, so as to realize the up and down circulation of the fracturing fluid in the mixing tank 8 and improve the mixing effect of the fracturing fluid.

[0023] Furthermore, if Figure 2-4 As shown, the stirring device includes a stirring motor 18 fixedly connected to the mixing tank 8, the output end of the stirring motor 18 is connected to the stirring shaft 14, and the stirring shaft 14 is provided with an inner stirring paddle 15; a driving wheel 23 is fixedly connected to the stirring shaft 14, and an upper idler wheel 25 is meshed with the driving wheel 23; the upper idler wheel 25 is coaxially fixedly connected to a lower idler wheel 26, and a driven wheel 24 is meshed with the lower idler wheel 26; the driven wheel 24 is fixedly connected to a stirring drum 16, and an outer stirring frame 9 is fixedly connected to the outer stirring frame 9, and an outer stirring paddle 10 is fixedly connected to the outer stirring paddle 15 and spaced from top to bottom.

[0024] When the stirring device is in use, the stirring motor 18 is started, and the stirring motor 18 drives the stirring shaft 14 to rotate, and the stirring shaft 14 stirs and mixes the fracturing fluid through the inner stirring paddle 15; at the same time, the stirring shaft 14 drives the driving wheel 23 to rotate, and the driving wheel 23 drives the lower idler wheel 26 to rotate through the upper idler wheel 25; the lower idler wheel 26 drives the driven wheel 24 to rotate, and the driven wheel 24 drives the stirring drum 16 to rotate, and the stirring drum 16 drives the outer stirring frame 9 to rotate, and the outer stirring frame 9 drives the outer stirring paddle 10 to rotate to stir and mix the fracturing fluid, and the inner stirring paddle 15 and the outer stirring paddle 10 cooperate to stir the fracturing fluid to improve the mixing effect of the fracturing fluid.

[0025] Furthermore, if Figure 2 and Figure 3As shown, the circulation device includes a discharge pipe 11 connected to the mixing tank 8, the discharge pipe 11 is connected to the temporary storage tank 2, and a valve is provided on the discharge pipe 11; the mixing tank 8 is connected to a circulation pump 13, and the circulation pump 13 is connected to a lower circulation pipe 12 connected to the discharge pipe 11; the circulation pump 13 is also connected to an upper circulation pipe 20 corresponding to the lower circulation pipe 12, and the upper circulation pipe 20 is connected to the filtering device; the circulation pump 13 cooperates with the lower circulation pipe 12 and the upper circulation pipe 20 to transport the fracturing fluid at the bottom of the mixing tank 8 to the filtering device.

[0026] Furthermore, if Figure 5-8 As shown, the filtration device is fixed to the mixing tank 8 with a fixed cylinder 17, and a plurality of fixed nets 36 are evenly distributed along the circumference of the outer circumference of the fixed cylinder 17; the upper circulation pipe 20 is connected to the annular pipe 28, and a plurality of input pipes connected to the fixed cylinder 17 are evenly distributed on the annular pipe 28 along the circumference; the fixed cylinder 17 is rotatably connected to a rotating frame 33, and the rotating frame 33 has connecting holes 41 corresponding to the input pipes evenly distributed along the circumference; the rotating frame 33 is evenly distributed with a plurality of movable nets 35 that cooperate with the plurality of fixed nets 36, and a plurality of movable nets 35 that cooperate with the plurality of fixed nets 36 are evenly distributed on the rotating frame 33. The movable net 35 and several fixed nets 36 are arranged at intervals along the circumference; a frustum-shaped guide plate 34 is fixedly connected to the fixed cylinder 17 and is arranged below the movable net 35, and the guide plate 34 is fixedly connected to the fixed net 36; a rotating cylinder 21 is provided on the outer periphery of the rotating frame 33 and is rotatably connected to the mixing tank 8, and the rotating cylinder 21 is provided with filter holes 22 corresponding to the movable net 35 and the fixed net 36; a support plate 37 is fixedly connected to the outer periphery of the guide plate 34, and the support plate 37 is evenly distributed with perforations corresponding to the filter holes 22 and the mixing tank 8.

[0027] When the filtering device is in use, the fracturing fluid in the upper circulation pipe 20 flows into the space between the fixed cylinder 17 and the rotating cylinder 21 through the annular pipe 28 and the input pipe, and the fracturing fluid flows into the space between the movable net 35, the fixed net 36, and the filter holes 22 through the connecting hole 41 on the rotating frame 33; the rotating frame 33 is rotated, and the rotating frame 33 drives the movable net 35 to move in a circular motion, and the movable net 35 cooperates with the fixed net 36 on the fixed cylinder 17 to squeeze and crush the fisheyes and bubbles in the fracturing fluid, so that the fracturing fluid that meets the standards flows back into the mixing tank 8 through the filter holes 22 and the perforation for mixing; in addition, by rotating the rotating cylinder 21, the filter holes 22 on the rotating cylinder 21 can be effectively avoided from being blocked, so as to improve the stability of the use of this application.

[0028] Furthermore, a rotating chamber 27 is intermittently rotated in the mixing tank 8, and a plurality of fan-shaped blocks 38 are connected to the rotating chamber 27 in a circumferential sliding manner; a plurality of the fan-shaped blocks 38 are fixedly connected to a connecting column 40, and a plurality of the connecting columns 40 are fixedly connected to the rotating frame 33; a slide rail is fixedly connected to the rotating chamber 27, and a plurality of the fan-shaped blocks 38 are slidably connected to the slide rail; a plurality of the fan-shaped blocks 38 are provided with fan-shaped springs 39 mounted on the slide rail on both sides, and a force-bearing seat provided at the other end of the fan-shaped spring 39 is fixedly connected to the rotating chamber 27.

[0029] When the rotating frame 33 needs to rotate, the rotating chamber 27 rotates intermittently, and the rotating chamber 27 drives the fan-shaped block 38 to move in a circular motion through the fan-shaped spring 39, and the fan-shaped block 38 drives the rotating frame 33 to rotate intermittently through the connecting column 40; through the setting of the fan-shaped spring 39, after the rotating chamber 27 stops rotating, if the movable net 35 is subjected to the reaction force of the fixed net 36, fisheye, etc., the rotating frame 33 squeezes the fan-shaped spring 39 through the connecting column 40 and the fan-shaped block 38. After the rotating chamber 27 stops rotating, the fan-shaped springs 39 on both sides of the fan-shaped block 38 repeatedly act on the fan-shaped block 38, causing the fan-shaped block 38 to reciprocate in the forward and reverse directions, thereby causing the movable net 35 to reciprocate and vibrate in the forward and reverse directions to exert force on the fracturing fluid, so as to improve the movable net 35's effect of breaking fisheyes and bubbles.

[0030] Furthermore, a driving motor 19 is fixedly connected to the mixing tank 8, the output end of the driving motor 19 is connected to an input wheel 29, and a ring gear engaged with the input wheel 29 is fixedly connected to the rotating cylinder 21; the driving motor 19 cooperates with the ring gear through the input wheel 29 to drive the rotating cylinder 21 to rotate continuously.

[0031] Furthermore, the input wheel 29 engages with the output wheel 30, and a shift rod 31 is fixed to the output wheel 30, and a groove wheel 32 corresponding to the shift rod 31 is rotatably connected to the mixing tank 8; the shift rod 31 is coaxially fixed to the limit block, and the groove wheel 32 is provided with a limit groove that cooperates with the limit block; the groove wheel 32 is coaxially fixed to the crank 42, and a connecting rod 43 is rotatably connected to the crank 42, and the connecting rod 43 is rotatably connected to the rotating chamber 27. The crank 42, the connecting rod 43, and the rotating chamber 27 constitute a crank 42 rocker mechanism; when the input wheel 29 rotates, the input wheel 29 drives the shift rod 31 to rotate through the output wheel 30, and the shift rod 31 drives the groove wheel 32 to rotate intermittently; the groove wheel 32 drives the crank 42 to rotate, and the crank 42 drives the rotating chamber 27 to rotate back and forth in the forward and reverse directions through the connecting rod 43.

[0032] like Figures 1 to 8 As shown, the working process of the present invention is explained in detail below.

[0033] When the present invention is in use, the stirring motor 18 is started, and the stirring motor 18 drives the stirring shaft 14 to rotate, and the stirring shaft 14 stirs and mixes the fracturing fluid through the internal stirring paddle 15; at the same time, the stirring shaft 14 drives the driving wheel 23 to rotate, and the driving wheel 23 drives the lower idler wheel 26 to rotate through the upper idler wheel 25; the lower idler wheel 26 drives the driven wheel 24 to rotate, and the driven wheel 24 drives the stirring drum 16 to rotate, and the stirring drum 16 drives the outer stirring frame 9 to rotate, and the outer stirring frame 9 drives the outer stirring paddle 10 to rotate to stir and mix the fracturing fluid.

[0034] At the same time, the circulation pump 13 is started, and the circulation pump 13 cooperates with the lower circulation pipe 12 and the upper circulation pipe 20 to transport the fracturing fluid at the bottom of the mixing tank 8 to the annular pipe 28; the fracturing fluid in the annular pipe 28 flows through the input pipe into the space between the fixed cylinder 17 and the rotating cylinder 21, and the fracturing fluid flows through the connecting hole 41 on the rotating frame 33 into the space between the movable net 35, the fixed net 36, and the filter hole 22.

[0035] The drive motor 19 is started, and the drive motor 19 cooperates with the ring gear through the input wheel 29 to drive the rotating cylinder 21 to rotate continuously; the input wheel 29 drives the shift lever 31 to rotate through the output wheel 30, and the shift lever 31 drives the groove wheel 32 to rotate intermittently; the groove wheel 32 drives the crank 42 to rotate, and the crank 42 drives the rotating chamber 27 to rotate back and forth in the forward and reverse directions through the connecting rod 43.

[0036] The rotating chamber 27 drives the sector block 38 to move in a circular motion through the sector spring 39, and the sector block 38 drives the rotating frame 33 to rotate intermittently through the connecting column 40, and the rotating frame 33 drives the movable net 35 to rotate intermittently; the movable net 35 cooperates with the fixed net 36 on the fixed cylinder 17 to squeeze and crush the fisheyes and bubbles in the fracturing fluid, so that the fracturing fluid that meets the standards flows back into the mixing tank 8 through the filter hole 22 and the perforation for mixing.

[0037] In addition, by setting the fan-shaped spring 39, after the rotating chamber 27 stops rotating, the movable net 35 is subjected to the reaction force of the fixed net 36, the fisheye, etc., so that the rotating frame 33 squeezes the fan-shaped spring 39 through the connecting column 40 and the fan-shaped block 38. After the rotating chamber 27 stops rotating, the fan-shaped springs 39 on both sides of the fan-shaped block 38 repeatedly act on the fan-shaped block 38, causing the fan-shaped block 38 to reciprocate in the forward and reverse directions, thereby causing the movable net 35 to reciprocate and vibrate in the forward and reverse directions to exert a force on the fracturing fluid, thereby improving the movable net 35's effect of breaking the fisheye and bubbles.

Claims

1. An oilfield nano-injection online continuous mixing skid-mounted device, comprising a container, on which a mixing device (1) is provided; characterized in that: The mixing device (1) is connected to a temporary storage tank (2), the temporary storage tank (2) is connected to a main pipeline (3), and the main pipeline (3) is connected to a plurality of injection pipelines (4); the mixing device (1) comprises a mixing tank (8) installed in a container, and the mixing tank (8) is provided with a stirring device; the top of the mixing tank (8) is provided with a filtering device connected to the mixing tank (8), and the mixing tank (8) is provided with a circulation device for driving the solution at the bottom of the mixing tank (8) to flow to the filtering device.

2. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 1, characterized in that: Multiple groups of injection pipes (4) are each provided with an injection pump (6), and the injection pipe (4) is connected to a sampling pipe (5) provided between the injection pump (6) and the main pipe (3); a valve is provided on the sampling pipe (5), and the injection pipe (4) is further provided with valves provided on both sides of the sampling pipe (5); a valve, a safety valve, a pressure transmitter, and a check valve are sequentially provided on the injection pipe (4), and the valve, safety valve, pressure transmitter, and check valve are provided on a side of the injection pump (6) away from the sampling pipe (5).

3. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 1, characterized in that: The stirring device comprises a stirring shaft (14) rotatably connected to a mixing tank (8), wherein an inner stirring paddle (15) is provided on the stirring shaft (14); a stirring drum (16) is further rotatably connected to the mixing tank (8) and rotates along with the stirring shaft (14); an outer stirring frame (9) is fixedly connected to the stirring drum (16); and an outer stirring paddle (10) is fixedly connected to the outer stirring frame (9) and is spaced apart from the inner stirring paddle (15) from top to bottom.

4. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 3, characterized in that: A stirring motor (18) is fixedly connected to the mixing tank (8), and an output end of the stirring motor (18) is fixedly connected to the stirring shaft (14); a driving wheel (23) is fixedly connected to the stirring shaft (14), and an upper idler wheel (25) is meshed with the driving wheel (23); a lower idler wheel (26) is coaxially fixedly connected to the upper idler wheel (25), and a driven wheel (24) fixedly connected to the stirring drum (16) is meshed with the lower idler wheel (26).

5. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 1, characterized in that: The circulation device comprises a discharge pipe (11) connected to the mixing tank (8), the discharge pipe (11) being in communication with the temporary storage tank (2), and a valve being provided on the discharge pipe (11); a circulation pump (13) being connected to the mixing tank (8), and a lower circulation pipe (12) being in communication with the discharge pipe (11) being connected to the circulation pump (13); and an upper circulation pipe (20) corresponding to the lower circulation pipe (12) being connected to the circulation pump (13), and the upper circulation pipe (20) being in communication with the filtering device.

6. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 1, characterized in that: The filtering device is fixed to a fixed cylinder (17) connected to the mixing tank (8), and a plurality of fixed nets (36) are evenly distributed along the circumference of the fixed cylinder (17); a rotating frame (33) is rotatably connected to the fixed cylinder (17), and a plurality of movable nets (35) cooperating with the plurality of fixed nets (36) are evenly distributed on the rotating frame (33), and the plurality of movable nets (35) and the plurality of fixed nets (36) are arranged at intervals along the circumference; the fixed cylinder (17) is fixed to the plurality of movable nets (35) provided on the movable nets (35). ) below the cone-shaped guide plate (34), the guide plate (34) is fixedly connected to the fixed net (36); the outer periphery of the rotating frame (33) is provided with a rotating cylinder (21) rotatably connected to the mixing tank (8), and the rotating cylinder (21) is provided with filter holes (22) corresponding to the movable net (35) and the fixed net (36); the outer periphery of the guide plate (34) is fixedly connected to a support plate (37), and the support plate (37) is evenly distributed with perforations corresponding to the filter holes (22) and the mixing tank (8).

7. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 6, characterized in that: The circulation device is connected to an annular tube (28), and a plurality of input tubes connected to the fixed cylinder (17) are evenly distributed along the circumference of the annular tube (28). The rotating frame (33) is evenly distributed along the circumference with communication holes (41) corresponding to the input tubes.

8. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 7, characterized in that: The mixing tank (8) is intermittently rotatably connected to a rotating chamber (27), and a plurality of fan-shaped blocks (38) are circumferentially slidably connected to the rotating chamber (27); a plurality of fan-shaped blocks (38) are fixedly connected to a connecting column (40), and a plurality of connecting columns (40) are fixedly connected to the rotating frame (33); a slide rail is fixedly connected to the rotating chamber (27), and a plurality of fan-shaped blocks (38) are slidably connected to the slide rail; a fan-shaped spring (39) is provided on both sides of the plurality of fan-shaped blocks (38) and is sleeved on the slide rail, and a force bearing seat provided at the other end of the fan-shaped spring (39) is fixedly connected to the rotating chamber (27).

9. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 8, characterized in that: A driving motor (19) is fixedly connected to the mixing tank (8), an output end of the driving motor (19) is connected to an input wheel (29), and a gear ring meshing with the input wheel (29) is fixedly connected to the rotating cylinder (21).

10. The oilfield nano-injection online continuous mixing skid-mounted equipment according to claim 9, characterized in that: The input wheel (29) is engaged with the output wheel (30), a shifting rod (31) is fixedly connected to the output wheel (30), and a groove wheel (32) corresponding to the shifting rod (31) is rotatably connected to the mixing tank (8); a crank (42) is coaxially fixedly connected to the groove wheel (32), a connecting rod (43) is rotatably connected to the crank (42), and the connecting rod (43) is rotatably connected to the rotating chamber (27). The crank (42), the connecting rod (43), and the rotating chamber (27) constitute a crank (42) rocker mechanism.

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