Nanometer injection integrated skid-mounted equipment

Abstract

The invention relates to nanometer injection integrated skid-mounted equipment which is characterized in that a central rotating pipe (21) drives a lateral suction pipe (26), a support frame (27) and a soft film cover (28) to rotate, the upper side or the lower side of the soft film cover (28) is jacked up by a reversing rod (29) to be bent, and an inner pipe (22) is driven to slide up and down in a reciprocating manner along the central rotating pipe (21), so that nanometer oil displacement agents with different depths are stirred and prevented from generating precipitates; the stirring range and the stirring effect are improved, and the working efficiency is improved; high-pressure water flow enters the center rotating pipe (21), when the high-pressure water flow flows to the throat pipe section (24) from the necking section (23) of the inner pipe (22), the flow speed of the high-pressure water flow is increased, and the pressure intensity of the high-pressure water flow is reduced, so that the nanometer oil displacement agent in the tank body (11) is sucked and mixed through the lateral suction pipe (26) and is further mixed under the action of the soft film cover (28), and finally mixed liquid of the nanometer oil displacement agent and water in a certain proportion is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield polymer injection, in particular to a nanometer injection integrated skid-mounted equipment. Background Art

[0002] Nano oil displacement agent is a new type of oil recovery auxiliary material that utilizes the high surface area, high diffusion rate, high permeability and better adsorption of nano materials, and is introduced into the formation through a specific injection process. It is mainly used to improve oil recovery, especially in the middle and late stages of oil field development, when traditional mining methods are difficult to effectively increase production. Nano oil displacement agent mainly changes the surface properties of reservoir rocks, enhances the affinity between water and oil, reduces the water-oil interfacial tension, and makes it easier to displace the crude oil originally adhered to the rock surface or in tiny pores, thereby improving crude oil recovery.

[0003] The Chinese utility model patent with the authorization announcement number CN217527178U discloses an intelligent nano oil-displacing agent monitorable online injection device. When the nano oil-displacing agent in the storage tank is observed to precipitate, it is stirred to maintain its uniformity, and the uniform nano oil-displacing agent is mixed with water in the liquid preparation tank, and the mixing uniformity can be observed, and then the uniformly mixed liquid and water are injected into the formation together. The defects of the above scheme are: two tanks and corresponding stirring mechanisms and connecting pipelines are required, the structure is complex, the floor space is large, and it needs to be dismantled and transported before being reassembled for use, which has low work efficiency; in addition, the stirring range and stirring effect of the stirring structure are limited, which affects the work efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing nano oil-displacing agent injection device needs to be equipped with two tanks and corresponding stirring mechanisms and connecting pipelines, which has a complex structure, occupies a large area, and needs to be dismantled and transported and then reassembled for use, resulting in low work efficiency; in addition, the stirring range and stirring effect of the stirring structure are limited, affecting work efficiency.

[0005] In order to solve the above problems, the present invention provides an integrated nano-injection skid-mounted equipment, wherein a tank body is provided on a bracket, a liquid inlet pipe and a liquid discharge pipe are provided on the tank body, a central rotating pipe for conveying high-pressure water flow is provided in the tank body, an inner tube is provided inside the central rotating pipe for sliding up and down, the inside of the inner tube is sequentially formed with a contracting section with a gradually decreasing aperture, a throat section with a uniform aperture and an expanding section with a gradually increasing aperture from top to bottom, a lateral suction pipe corresponding to the throat section is provided on the inner tube along its radial direction, a support frame is provided on the lateral suction pipe, a soft film cover is provided outside the support frame, and a reversing rod is provided on the support frame for vertical sliding to lift the upper side or the lower side of the soft film cover.

[0006] The nano-injection integrated skid-mounted equipment provided by the present invention also has the following technical features: The support frame includes a cross bar perpendicular to the lateral suction tube and a cross roller parallel to the lateral suction tube. Both sides of the lateral suction tube are provided with a cross bar. The cross roller is rotatably arranged at the end of the cross bar and abuts against the inner side of the soft film cover. A vertical groove is provided on one of the cross bars, and a reversing rod is slidably arranged in the vertical groove. Top rollers are rotatably arranged at both ends of the reversing rod. A pressure cylinder is rotatably arranged on the cross bar, and a pressure rod is rotatably arranged in the middle of the reversing rod. The pressure rod is inserted into the pressure cylinder through a pressure spring. The central rotating tube is provided with limiting rods above and below the top rollers, and the limiting rods can abut against the corresponding top rollers to lift up the upper side or the lower side of the soft film cover.

[0007] A plurality of abutment joints corresponding to the top rollers are arranged on one side of the limit rod close to the soft film cover; a support ring is arranged on the limit rod, and the support ring is connected to the central rotating pipe.

[0008] The central rotating tube is provided with a long hole corresponding to the lateral suction tube, and the lateral suction tube is inserted into the long hole and slides up and down along the long hole; Extension tubes are arranged at both upper and lower ends of the inner tube, and a sealing ring is arranged between the extension tube and the central rotating tube.

[0009] The lower end of the central rotating tube is sealed, and a plurality of stirring blades are arranged at intervals along its circumference. The stirring blades are located on the lower side of the soft film cover and are arranged obliquely. A flow passage connected to the interior of the central rotating tube is arranged inside the stirring blades, and a cover plate corresponding to the flow passage is arranged on the stirring blades.

[0010] The flow passage is a through hole opened along the spiral line.

[0011] One side of the cover plate is rotatably connected to the stirring blade, and a magnetic attraction layer is provided on the side where the cover plate and the stirring blade are close to each other.

[0012] The top of the tank body is open and provided with a cover body, on which a motor is mounted via a mounting frame, and an output end of the motor is connected to a central rotating tube, which is rotatably connected to the cover body; a plurality of side holes are provided on the central rotating tube at intervals along its circumference, and a ring body is provided on the cover body, on the inner side of the ring body a uniformly distributed groove connected to the side holes is provided, and on the outer side of the ring body a water injection pipe connected to the uniformly distributed groove is connected.

[0013] The inner tube is provided with three lateral suction pipes at intervals along its circumference.

[0014] The present invention has the following beneficial effects: (1) The present invention injects the prepared nano oil-displacing agent into the tank body through the liquid inlet pipe for storage, and drives the lateral suction pipe, the support frame and the soft film cover to rotate through the central rotating pipe to stir the nano oil-displacing agent in the tank body to prevent it from precipitating. The upper side or the lower side of the soft film cover is lifted up by the reversing rod and becomes curved. Based on the Bernoulli principle, the soft film cover can drive the inner tube to slide back and forth along the central rotating pipe to stir the nano oil-displacing agent at different depths, thereby improving the stirring range and stirring effect and improving work efficiency. High-pressure water flows into the central rotating pipe. When it flows from the constricted section of the inner tube to the throat section, the flow rate of the high-pressure water flow increases and the pressure decreases, so that the nano oil-displacing agent in the tank body is sucked in through the lateral suction pipe. Due to the large relative speed of the two liquids, the high-pressure water flow collides, contacts and mixes with the nano oil-displacing agent, and is further mixed under the action of the rotation and up and down reciprocating sliding of the soft film cover, and finally a mixed liquid of a certain proportion of nano oil-displacing agent and water is obtained, and is discharged through the discharge pipe.

[0015] (2) The present invention only needs to set up a tank body to achieve the storage and mixing of the nano oil-displacing agent. The structure is simple, and the tank body is integrated on the bracket to form a skid-mounted whole, which occupies a small area. When in use, only the skid-mounted whole needs to be moved to transport the equipment to the work area, which is convenient for movement and installation and improves work efficiency.

[0016] (3) In the present invention, the soft film cover can drive the inner tube and the lateral suction pipe to slide back and forth along the central rotating tube, so that the lateral suction pipe can suck the nano oil-displacing agent or the mixture of the nano oil-displacing agent and water at different depths in the tank body. The stirring effect of the rotation and the reciprocating sliding of the soft film cover can enhance the mixing effect of the nano oil-displacing agent and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a pipeline connection schematic diagram of the present invention; Figure 2 Schematic diagram of the internal structure of the tank; Figure 3 for Figure 2 A partial cross-sectional view of Figure 4 for Figure 3 A partial enlarged view of the middle A; Figure 5 It is a cross-sectional view of the internal structure of the soft film cover; Figure 6 for Figure 5 A front view of Figure 7 for Figure 6 The motion state change diagram; Figure 8 is a schematic diagram of the structure of the stirring blade; Fig. 9 for Figure 3 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0019] like Figures 1 to 9 As shown, the nano-injection integrated skid-mounted equipment of the present invention has a tank body 11 on the bracket 10, and a liquid inlet pipe 12 and a liquid discharge pipe 13 are provided on the tank body 11. A central rotating pipe 21 for conveying high-pressure water flow is provided in the tank body 11, and an inner tube 22 is provided inside the central rotating pipe 21 for sliding up and down. The inner tube 22 has a contracting section 23 with a gradually decreasing aperture, a throat section 24 with a uniform aperture, and an expanding section 25 with a gradually increasing aperture formed in sequence from top to bottom. A lateral suction pipe 26 corresponding to the throat section 24 is provided on the inner tube 22 along its radial direction, and a support frame 27 is provided on the lateral suction pipe 26. A soft film cover 28 is provided outside the support frame 27, and a reversing rod 29 is provided on the support frame 27 for vertical sliding to lift the upper side or the lower side of the soft film cover 28.

[0020] The present invention injects the prepared nano oil-displacing agent into the tank body 11 through the liquid inlet pipe 12 for storage, and drives the lateral suction pipe 26, the support frame 27 and the soft film cover 28 to rotate through the central rotating pipe 21 to stir the nano oil-displacing agent in the tank body 11 to prevent it from precipitating. The upper side or the lower side of the soft film cover 28 is lifted up by the reversing rod 29 and becomes curved. Based on the Bernoulli principle, the soft film cover 28 can drive the inner tube 22 to slide back and forth up and down along the central rotating pipe 21 to stir the nano oil-displacing agent at different depths, thereby improving the stirring range and stirring effect. , improving work efficiency; high-pressure water flows into the central transfer pipe 21, and when it flows from the constricted section 23 of the inner tube 22 to the throat section 24, the flow rate of the high-pressure water flow increases and the pressure decreases, so that the nano-oil-displacing agent in the tank body 11 is sucked in through the lateral suction pipe 26. Due to the large relative speed of the two liquids, the high-pressure water flow collides, contacts and mixes with the nano-oil-displacing agent, and is further mixed under the action of the rotation and up and down reciprocating sliding of the soft film cover 28, and finally a mixed liquid of a certain proportion of nano-oil-displacing agent and water is obtained, and is discharged through the drain pipe 13.

[0021] The present invention only needs to set up a tank body 11 to realize the storage and mixing of the nano oil-displacing agent. The structure is simple, and the tank body 11 is integrated on the bracket 10 to form a skid-mounted whole, which occupies a small area. When in use, only the skid-mounted whole needs to be moved to transport the equipment to the working area, which is convenient for movement and installation and improves work efficiency.

[0022] In the present invention, the soft film cover 28 can drive the inner tube 22 and the lateral suction pipe 26 to slide back and forth along the central rotating tube 21, so that the lateral suction pipe 26 can suck the nano oil-displacing agent or the mixture of nano oil-displacing agent and water at different depths in the tank body 11, and the stirring effect of the rotation and up and down reciprocating sliding of the soft film cover 28 is improved to improve the mixing effect of the nano oil-displacing agent and water.

[0023] After the high-pressure water flow and the nano oil-displacing agent collide, contact and mix, they are discharged into the tank body 11 through the lower part of the central transfer pipe 21 .

[0024] Among them, compared with the traditional Venturi tube with uniform wall thickness, the outer diameter of the inner tube 22 is consistent, and its outer wall fits and slides with the inner wall of the central rotating tube 21. The inner diameter of the inner tube 22 decreases, remains consistent, and expands in sequence to reduce the entry of external liquid into the space between the inner tube 22 and the central hose 21. At the same time, since the wall thickness of the inner tube 22 corresponding to the throat section 24 is larger, it can provide more stable support for the lateral suction tube 26 and extend its service life.

[0025] The soft film cover 28 can be made of silicone rubber or TPU thermoplastic polyurethane. Silicone rubber has good flexibility and temperature resistance, and also has good biocompatibility and chemical stability. TPU can provide excellent wear resistance and elasticity, and is suitable for occasions that require frequent deformation. The edge of the soft film cover 28 is sealed and connected to the support frame 27, and can be connected by a clamp, screws or other forms of fixing devices, or by hot melt welding.

[0026] Among them, a visual window is provided on the side wall of the tank body 11, which is made of tempered glass. The longitudinal dimension of the visual window is close to the height of the tank body 11 and larger than the lateral dimension, that is, the visual window is in the shape of a vertical strip, so as to facilitate observation of the liquid inside the tank body 11. Based on the prior art, if the nano oil-displacing agent is left to stand for a long time, precipitation and unevenness are likely to occur at the bottom. At this time, the upper layer is gray-brown, while the nano oil-displacing agent with uniform texture is black; and when the nano oil-displacing agent is mixed with water, stratification will also occur if the two are not fully mixed. The nano oil-displacing agent in the tank body 11 or the state of the nano oil-displacing agent when mixed with water can be observed through the long visual window to determine whether the texture is uniform.

[0027] Among them, see Figure 1The inlet pipe 12 is provided with a valve 14 and a metering pump 15 to inject the configured nano oil-displacing agent into the tank body 11; the discharge pipe 13 is provided with a valve 14 and a plunger pump 16. A main pipeline is connected between the water storage station and the water injection well to transport the mixed liquid of the nano oil-displacing agent and water to the main pipeline and inject it into the formation together with water. A reflux pipe 17 can also be provided between the inlet pipe 12 and the discharge pipe 13, and a valve 14 and a metering pump 15 are provided on the reflux pipe 17; the discharge pipe 13 can be provided with a sampling end 18, and the discharged mixed liquid is sampled and tested through the sampling end 18. If the uniformity of the mixed liquid meets the requirements, it will be discharged through the plunger pump 16, otherwise it will be transported to the inlet pipe 12 through the reflux pipe 17 for re-mixing.

[0028] In addition, when the tank body 11 is used to store the nano oil-displacing agent, the liquid level of the injected nano oil-displacing agent needs to be higher than the highest point of the lateral suction pipe 26, so that the lateral suction pipe 26 can suck the nano oil-displacing agent during mixing. Moreover, those skilled in the art can choose to set the size of the tank body 11 and the setting position of the soft film cover 28 according to actual conditions, so as to adapt to the preparation of mixed liquids of nano oil-displacing agent and water with different mixing ratios, so as to obtain a nano oil-displacing agent mixed liquid with a mixing ratio between 1:2 and 1:10, so as to achieve preliminary mixing of the nano oil-displacing agent in an appropriate proportion, and inject it into the formation together with water through the main water distribution pipeline, and the preliminary mixing process can reduce the concentration of the nano oil-displacing agent, so that it is more evenly dispersed in water, and the recovery rate is improved.

[0029] A plurality of adjustable legs 19 are provided at the bottom of the tank body 11 , and the tank body 11 is supported by the adjustable legs 19 .

[0030] Preferably, see Figure 2 , Figure 5 , Figure 6 , Figure 7 The support frame 27 includes a cross bar 30 perpendicular to the lateral suction pipe 26 and a cross roller 31 parallel to the lateral suction pipe 26. The cross bars 30 are provided on both sides of the lateral suction pipe 26. The cross roller 31 is rotatably arranged at the end of the cross bar 30 and abuts against the inner side of the soft film cover 28. A vertical groove 32 is formed on one of the cross bars 30, and the reversing rod 29 is slidably arranged in the vertical groove 32. Top rollers 33 are rotatably arranged at both ends of the reversing rod 29, and the top rollers 33 abut against the inner side of the soft film cover 28. A pressing cylinder 34 is rotatably arranged on the cross bar 30, and a pressing rod 35 is rotatably arranged in the middle of the reversing rod 29, and the pressing rod 35 is inserted into the pressing cylinder 34 through a compression spring 36. The central rotating tube 21 is provided with limiting rods 37 above and below the top rollers 33 . The limiting rods 37 can abut against the corresponding top rollers 33 to lift up the upper side or the lower side of the soft film cover 28 .

[0031] When the upper side or lower side of the soft film cover 28 of the present invention is lifted by the top roller 33, the rotation of the central rotating tube 21 will cause the soft film cover 28 to move upward or downward until the top roller 33 abuts against the corresponding limit rod 37, and the inner tube 22 continues to slide along the central rotating tube 21, causing the reversing rod 29 to slide reversely along the vertical groove 32, and the pressure rod 35 moves toward the pressure cylinder 34 and compresses the compression spring 36 until the middle of the reversing rod 29 crosses the central horizontal line of the cross bar 30, and the pressure rod 35 moves back to the pressure cylinder 34 and resets the compression spring 36, so that the other top roller 33 lifts the lower side or upper side of the soft film cover 28. At this time, the rotation of the central rotating tube 21 will cause the soft film cover 28 to move downward or upward, and this cycle is repeated, so that the soft film cover 28 drives the inner tube 22 to slide back and forth along the central rotating tube 21 to stir the nano-oil-displacing agent at different depths.

[0032] The structure of the support frame 27 is preferably: both sides and both ends of the lateral suction pipe 26 are provided with cross bars 30 located on the same horizontal plane, and cross rollers 31 are rotatably provided between the ends of the cross bars 30 at both ends of the lateral suction pipe 26. Figure 2 , Figure 5 As shown; of course, the structure of the support frame 27 can also be: cross bars 30 located on the same horizontal plane are provided on both sides of the middle of the lateral suction tube 26, and the ends of the cross bars 30 are rotatably connected to the middle of the cross rollers 31. At this time, the cross rollers 31 should be cut off and respectively arranged on both sides of the cross bars 30 to achieve better support for the soft film cover 28.

[0033] The cross-sections of the reversing rod 29 and the vertical groove 32 are dovetail shapes that fit together to avoid failure of the connection between the two.

[0034] The reversing rod 29 is slidably disposed on one of the cross bars 30. For example, Figure 5 As shown in FIG. 1 , the reversing rod 29 is slidably arranged on the left crossbar 30. Figure 4 In the top view, the central rotating tube 21 rotates clockwise; on the contrary, if the reversing rod 29 is slidably disposed on the right side cross bar 30, at this time Figure 4 In the top view, the central rotating tube 21 rotates counterclockwise, so that the Bernoulli principle is actually applied.

[0035] Among them, see Figure 6 , Figure 7 The cross bar 30 is provided with two limiting protrusions 46, which are respectively arranged at the upper and lower sides of the pressing cylinder 34 to limit the up and down sliding of the reversing rod 29 along the vertical groove 32 to avoid connection failure. Of course, when the limiting protrusions 46 are not provided, under the action of the soft film cover 28, the reversing rod 29 can only slide along the vertical groove 32 with a certain stroke, that is, the soft film cover 28 also has a limiting effect on the reversing rod 29.

[0036] Preferably, see Figure 4The side of the limit rod 37 close to the soft film cover 28 is provided with a plurality of abutment joints 38 corresponding to the top roller 33; the limit rod 37 is provided with a support ring 39, and the support ring 39 is connected to the central rotating tube 21. The abutment joint 38 is preferably made of a soft material such as rubber to reduce damage to the soft film cover 28. The limit rod 37 may be provided with a plurality of support rings 39 to improve the support stability of the limit rod 37.

[0037] Preferably, see Figure 2 The central rotating tube 21 is provided with a long hole 40 along its length direction, and the lateral suction tube 26 slides along the long hole 40; See also Figure 3 , Figure 4 The inner tube 22 is provided with extension tubes 41 at both upper and lower ends, and a sealing ring 42 is provided between the extension tube 41 and the central rotating tube 21 .

[0038] The corresponding positions and sizes of the limiting rod 37, the abutting joint 38 and the long hole 40 are set to meet the following conditions: for example, when the upper side of the soft film cover 28 is lifted by the top roller 33, and the soft film cover 28 moves upward until the top roller 33 at the upper end of the reversing rod 29 abuts against the corresponding limiting rod 37, the lateral suction tube 26 continues to slide upward along the long hole 40, so that the reversing rod 29 slides downward along the vertical groove 32 until the top roller 33 at the lower end of the reversing rod 29 lifts the lower side of the soft film cover 28. When the lower side of the soft film cover 28 is lifted by the top roller 33, it is similar to the above, and will not be described in detail here.

[0039] Among them, the length of the inner tube 22 is close to the length of the long hole 40, the sum of the lengths of the two extension tubes 41 is greater than the length of the long hole 40, and the sealing ring 42 is arranged at one end of the extension tube 41 away from the inner tube 22 to prevent the liquid in the tank body 11 from entering the central transfer tube 21 other than the inner tube 22 and the extension tube 41, affecting the mixing effect.

[0040] The central rotating pipe 21 can be arranged in sections and connected by flanges to facilitate the installation of the inner pipe 22.

[0041] Preferably, see Figure 2 , Figure 3 , Figure 8 The lower end of the central rotating tube 21 is sealed, and a plurality of stirring blades 43 are arranged at intervals along its circumference. The stirring blades 43 are located at the lower side of the soft film cover 28 and are arranged obliquely. A flow passage 44 communicating with the interior of the central rotating tube 21 is arranged inside the stirring blades 43, and a cover plate 45 corresponding to the flow passage 44 is arranged on the stirring blades 43.

[0042] After the high-pressure water flow of the present invention is mixed with the nano oil-displacing agent, it flows downward along the central rotating pipe 21 and into the flow passage 44 in the stirring blade 43 , and then is discharged into the tank body 11 and further mixed by the rotation of the stirring blade 43 .

[0043] When the central rotating tube 21 is stationary, the cover plate 45 will block the flow passage 44 to prevent the nano oil-displacing agent in the tank body 11 from entering the central rotating tube 21 through the flow passage 44 or the lateral suction tube 26 and affecting the mixing effect of the high-pressure water flow and the nano oil-displacing agent. When the central rotating tube 21 rotates, under the action of centrifugal force and internal pressure, the cover plate 45 will open the flow passage 44 to facilitate the high-pressure water flow and the nano oil-displacing agent to be mixed and discharged.

[0044] The plane where the stirring blade 43 is located has a certain angle with the horizontal plane, preferably 45 degrees, so that when the stirring blade 43 rotates with the central rotating tube 21 to generate a stirring effect, it can also push the liquid in the tank body 11 upward to the soft film cover 28 for coordinated stirring, thereby improving the stirring effect. The stirring blade 43 includes a central column and blades on both sides of the central column. The flow passage 44 is opened in the central column, and the lightweight design of the stirring blade 43 is realized at the same time.

[0045] Preferably, see Figure 8 , the flow passage 44 is a through hole opened along the spiral line. The spiral line can be conical, that is, from close to to far away from the central rotating tube 21, the spiral line gradually spreads relative to the center line, so that after the high-pressure water flow and the nano oil-displacing agent are mixed, they can flow in the flow passage 44 of the above trajectory, further mixing the high-pressure water flow and the nano oil-displacing agent and generating a swirling effect, thereby improving the mixing effect.

[0046] The stirring blade 43 with a spiral through hole formed therein can be obtained by 3D printing or selective laser melting, etc. Of course, two half parts of the stirring blade 43 can also be obtained by casting, and then combined to form the final stirring blade 43.

[0047] Preferably, one side of the cover plate 45 is rotatably connected to the stirring blade 43 , and a magnetic attraction layer is provided on the side where the cover plate 45 and the stirring blade 43 are close to each other.

[0048] When the central rotating tube 21 is stationary, the cover plate 45 will block the flow passage 44 under the action of the magnetic attraction layer; when the central rotating tube 21 rotates, under the action of centrifugal force and internal pressure, the cover plate 45 will overcome the attraction of the magnetic attraction layer and open the flow passage 44.

[0049] The cover plate 45 is preferably circular.

[0050] Preferably, see Figure 3 , Fig. 9The top of the tank body 11 is open and provided with a cover body 51, on which a motor 53 is mounted through a mounting frame 52, and an output end of the motor 53 is connected to a central rotating tube 21, which is rotatably connected to the cover body 51; the central rotating tube 21 is provided with a plurality of side holes 54 at intervals along its circumference, and a ring body 55 is provided on the cover body 51, on the inner side of the ring body 55 a uniformly distributed groove 56 communicating with the side hole 54 is formed, and on the outer side of the ring body 55 a water injection pipe 57 communicating with the uniformly distributed groove 56 is connected.

[0051] The output end of the motor 53 is connected to the central rotating tube 21 through a coupling, and the central rotating tube 21 is rotatably sealed with the cover body 51 and the ring body 55 through bearings and sealing rings. The motor 53 is equipped with a corresponding power supply and controller to control the start and stop and adjust the speed.

[0052] The cover 51 is connected to the top of the tank 11 by threads or buckles; a one-way exhaust valve 58 is provided on the cover 51 to discharge the gas in the tank 11. A valve 14 and a metering pump 15 are provided on the water injection pipe 57 to inject high-pressure water into the tank 11. The liquid inlet pipe 12, the liquid discharge pipe 13, the water injection pipe 57 and the corresponding valve 14, metering pump 15 or plunger pump 16 are all arranged on the bracket 10, so as to be integrated with the tank 11 on the bracket 10 to form a skid-mounted whole, which is convenient for movement and installation and improves work efficiency.

[0053] Preferably, three lateral suction pipes 26 are provided on the inner tube 22 at intervals along its circumference, so that the axis angles of adjacent lateral suction pipes 26 are 120°, thereby improving the suction efficiency of the nano-oil-displacing agent and avoiding the formation of lateral suction pipes 26 with overlapping axes, thereby preventing the nano-oil-displacing agent sucked in by the current lateral suction pipet 26 from being affected by the nano-oil-displacing agent sucked in by other lateral suction pipets 26, so that the nano-oil-displacing agent can be stably sucked in.

[0054] A method for using a nano-injection integrated skid-mounted device comprises the following steps: S10, injecting nano oil-displacing agent into the tank body 11 through the liquid inlet pipe 12, and making the liquid level higher than the lateral suction pipe 26, the central rotating pipe 21 rotates at a speed of 30 to 150 r / min, driving the soft film cover 28 to rotate and move up and down, so as to stir the nano oil-displacing agent to prevent it from precipitating; S20, high-pressure water is introduced into the central rotating tube 21. When the high-pressure water flows through the throat section 24, the flow rate increases and the pressure decreases. The nano oil-displacing agent in the tank body 11 is sucked in through the lateral suction pipe 26 and mixed with water. At the same time, the central rotating tube 21 rotates at a speed of 30 to 150 r / min, driving the soft film cover 28 to rotate and move up and down, and the nano oil-displacing agent and water are preliminarily stirred and mixed; S30 , the central rotating tube 21 rotates at a speed of 200 to 1000 r / min, driving the soft film cover 28 to rotate and move up and down, quickly stirring and mixing the nano oil-displacing agent and water, and discharging the obtained mixed liquid from the discharge pipe 13 .

[0055] When water is injected into the tank body 11, the nano oil-displacing agent and water are stirred at a low speed to reduce gas mixing and facilitate initial mixing. After the water is injected, high-speed stirring is performed to improve the mixing efficiency.

[0056] The working principle of the present invention is as follows: When storing the nano oil-displacing agent, the prepared nano oil-displacing agent is injected into the tank body 11 through the liquid inlet pipe 12, and the output end of the motor 53 drives the central rotating tube 21 to rotate, and drives the lateral suction pipe 26, the support frame 27 and the soft film cover 28 to rotate. At the same time, the upper side or the lower side of the soft film cover 28 is lifted up by the reversing rod 29 and becomes curved. Based on the Bernoulli principle, the soft film cover 28 can drive the inner tube 22 to slide back and forth along the central rotating tube 21, so as to stir the nano oil-displacing agent at different depths in the tank body 11 to avoid precipitation, thereby improving the stirring range and stirring effect, and improving work efficiency; Specifically, Figure 6 As shown, when the upper side of the soft film cover 28 is lifted by the top roller 33 at the upper end of the reversing rod 29, based on the Bernoulli principle, the rotation of the central rotating tube 21 will cause the soft film cover 28 to move upward until the top roller 33 at the upper end of the reversing rod 29 abuts against the upper abutment 38, and the inner tube 22 continues to slide upward along the central rotating tube 21, so that the reversing rod 29 slides downward along the vertical groove 32, and the pressing rod 35 moves toward the pressing cylinder 34 and compresses the compression spring 36 until the middle of the reversing rod 29 passes the central horizontal line of the cross bar 30, and the pressing rod 35 moves away from the pressing cylinder 34 and resets the compression spring 36, so that the top roller 33 at the lower end of the reversing rod 29 lifts the lower side of the soft film cover 28, as shown in FIG. Figure 7 As shown, at this time, the rotation of the central rotating tube 21 will cause the soft film cover 28 to move downward until the top roller 33 at the lower end of the reversing rod 29 abuts against the abutment head 38 below, and in this cycle, the soft film cover 28 drives the inner tube 22 to slide back and forth up and down along the central rotating tube 21 to stir the nano-oil-displacing agent at different depths.

[0057] When mixing the nano oil-displacing agent, the high-pressure water is introduced into the uniformly distributed groove 56 on the inner side of the ring body 55 through the water injection pipe 57, and enters the central rotating pipe 21 through the side hole 54. When the high-pressure water flows from the constricted section 23 of the inner tube 22 to the throat section 24, the flow rate of the high-pressure water increases and the pressure decreases, and the nano oil-displacing agent in the tank body 11 is sucked in through the lateral suction pipe 26. Due to the high relative speed of the two liquids, the high-pressure water and the nano oil-displacing agent collide, contact and mix, and the soft film cover 28 rotates and The liquid is further mixed under the action of reciprocating sliding up and down, and finally flows downward along the central rotating pipe 21 and into the flow passage 44 in the stirring blade 43, and then discharged into the tank body 11 and further mixed by the rotation of the stirring blade 43. The stirring blade 43 can push the liquid in the tank body 11 upward to the soft film cover 28 for coordinated stirring, thereby improving the stirring effect. The above process is carried out for a certain period of time until a mixed liquid of nano-oil-displacing agent and water of a certain proportion and uniform mixing is obtained, and is discharged through the discharge pipe 13 and the plunger pump 16.

[0058] During the mixing process, the lateral suction tube 26 can absorb the nano oil-displacing agent or the mixture thereof with water at different depths in the tank 11, and cooperate with the stirring effect of the rotation and up and down reciprocating sliding of the soft film cover 28 to enhance the mixing effect of the nano oil-displacing agent and water.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano-injection integrated skid-mounted device, characterized in that: A tank body (11) is provided on the support (10), and a liquid inlet pipe (12) and a liquid discharge pipe (13) are provided on the tank body (11). A central rotating pipe (21) for conveying a high-pressure water flow is provided inside the tank body (11). An inner tube (22) is provided inside the central rotating pipe (21) so as to slide up and down. The inner tube (22) is provided with a constricting section (23) with a gradually decreasing aperture, a throat section (24) with a uniform aperture, and an expanding section (25) with a gradually increasing aperture in sequence from top to bottom. A lateral suction pipe (26) corresponding to the throat section (24) is provided on the inner tube (22) along its radial direction. A support frame (27) is provided on the lateral suction pipe (26). A soft film cover (28) is provided outside the support frame (27). A reversing rod (29) is provided on the support frame (27) so as to vertically slide so as to lift up the upper side or the lower side of the soft film cover (28).

2. The nano-injection integrated skid-mounted equipment according to claim 1, characterized in that: The support frame (27) comprises a cross bar (30) perpendicular to the lateral suction tube (26) and a cross roller (31) parallel to the lateral suction tube (26). The cross bars (30) are provided on both sides of the lateral suction tube (26). The cross roller (31) is rotatably arranged at the end of the cross bar (30) and abuts against the inner side of the soft film cover (28). A vertical groove (32) is formed on one of the cross bars (30), a reversing rod (29) is slidably arranged in the vertical groove (32), top rollers (33) are rotatably arranged at both ends of the reversing rod (29), a pressure cylinder (34) is rotatably arranged on the cross bar (30), a pressure rod (35) is rotatably arranged in the middle of the reversing rod (29), and the pressure rod (35) is inserted into the pressure cylinder (34) through a pressure spring (36); The central rotating tube (21) is provided with limiting rods (37) above and below the top roller (33), and the limiting rods (37) can abut against the corresponding top roller (33) to lift up the upper side or the lower side of the soft film cover (28).

3. The nano-injection integrated skid-mounted equipment according to claim 2, characterized in that: A plurality of abutment joints (38) corresponding to the top rollers (33) are provided on one side of the limiting rod (37) close to the soft film cover (28); a support ring (39) is provided on the limiting rod (37), and the support ring (39) is connected to the central rotating tube (21).

4. The nano-injection integrated skid-mounted equipment according to claim 1, characterized in that: The central rotating tube (21) is provided with an elongated hole (40) corresponding to the lateral suction tube (26), and the lateral suction tube (26) is inserted into the elongated hole (40) and slides up and down along the elongated hole (40); Extension tubes (41) are provided at both the upper and lower ends of the inner tube (22), and a sealing ring (42) is provided between the extension tube (41) and the central rotating tube (21).

5. The nano-injection integrated skid-mounted equipment according to claim 1, characterized in that: The lower end of the central rotating tube (21) is sealed, and a plurality of stirring blades (43) are provided at intervals along the circumference thereof. The stirring blades (43) are located at the lower side of the soft film cover (28) and are arranged obliquely. A flow passage (44) communicating with the interior of the central rotating tube (21) is provided inside the stirring blades (43). A cover plate (45) corresponding to the flow passage (44) is provided on the stirring blades (43).

6. The nano-injection integrated skid-mounted equipment according to claim 5, characterized in that: The flow passage (44) is a through hole opened along the spiral line.

7. The nano-injection integrated skid-mounted equipment according to claim 5, characterized in that: One side of the cover plate (45) is rotatably connected to the stirring blade (43), and a magnetic attraction layer is provided on the side where the cover plate (45) and the stirring blade (43) are close to each other.

8. The nano-injection integrated skid-mounted equipment according to claim 1, characterized in that: The top of the tank body (11) is open and provided with a cover body (51). A motor (53) is mounted on the cover body (51) via a mounting frame (52). The output end of the motor (53) is connected to the central rotating tube (21). The central rotating tube (21) is rotatably connected to the cover body (51). The central rotating tube (21) is provided with a plurality of side holes (54) spaced along its circumference. The cover body (51) is provided with a ring body (55). The inner side of the ring body (55) is provided with uniformly distributed grooves (56) communicating with the side holes (54). The outer side of the ring body (55) is connected with a water injection pipe (57) communicating with the uniformly distributed grooves (56).

9. The nano-injection integrated skid-mounted equipment according to claim 1, characterized in that: The inner tube (22) is provided with three lateral suction pipes (26) at intervals along its circumference.

10. The method for using the nano-injection integrated skid-mounted equipment according to any one of claims 1 to 9, characterized in that: The steps include: S10, injecting the nano oil-displacing agent into the tank body (11) through the liquid inlet pipe (12), and making the liquid level higher than the side suction pipe (26), so that the central rotating pipe (21) rotates at a speed of 30 to 150 r / min, driving the soft film cover (28) to rotate and move up and down, so as to stir the nano oil-displacing agent to prevent it from precipitating; S20, introducing high-pressure water into the central rotating pipe (21); when the high-pressure water flows through the throat section (24), the flow rate increases and the pressure decreases, and the nano-oil-displacing agent in the tank (11) is sucked in through the lateral suction pipe (26) and mixed with the water; at the same time, the central rotating pipe (21) is rotated at a speed of 30 to 150 r / min, driving the soft film cover (28) to rotate and move up and down, and preliminarily stirring and mixing the nano-oil-displacing agent and water; S30, rotating the central rotating tube (21) at a speed of 200 to 1000 r / min, driving the soft film cover (28) to rotate and move up and down, quickly stirring and mixing the nano oil-displacing agent and water, and discharging the obtained mixed liquid from the discharge pipe (13).

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