Nano skid-mounted equipment for oil field and mixing method

Abstract

The invention provides an oil field nanometer skid-mounted device and a mixing method, and relates to the technical field of oil field exploiting.The oil field nanometer skid-mounted device comprises a supporting frame, a mixing box and a processing unit are fixedly installed on the supporting frame, a stirring unit is installed in the mixing box, and the top of the mixing box is fixedly connected with a feeding hopper communicated with the interior of the mixing box; a pollution discharge unit and a plugging unit are mounted on the treatment unit; the treatment unit comprises a filtering and backflushing part, a driving part and a water supply part; through the arrangement of a plurality of filter frames in the filter back-flushing component, and the apertures of filter screen meshes on the filter frames close to and far away from the water supply pipe are sequentially reduced, the fracturing fluid base fluid can be finely filtered step by step, impurities of different sizes are effectively removed, the cleanliness of the base fluid entering the mixing box is greatly improved, and the working efficiency is improved. A foundation is laid for subsequent uniform mixing of a nano material and a base solution, and the use effect of the mixed solution is guaranteed; all parts of the equipment are integrated and fixed on the supporting frame to form a skid-mounted structure, and the overall size is compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield exploitation, and in particular to an oilfield nanometer rig-mounted device and a mixing method. BACKGROUND

[0002] In the process of oilfield exploitation, fracturing operation is one of the key technical means to improve the productivity of oil and gas wells, and the performance of fracturing fluid directly affects the fracturing effect. With the application of nanotechnology in the field of oilfields, nanomaterials are mixed with fracturing fluid base fluid (such as water, crosslinked fluid, etc.) to form nanofracturing fluid, which has the advantages of low friction, high sand carrying capacity, easy flowback, etc., and gradually becomes an important choice to improve fracturing efficiency. The water source of fracturing fluid base fluid is mostly from underground water, surface water (such as river water, well water) or recovered flowback fluid in the oilfield site. These water sources may mix with natural impurities such as silt and microbial debris in the natural environment, so it is necessary to filter and treat them before mixing with nanomaterials.

[0003] However, there are still many technical pain points in the existing on-site mixing and processing process of nanofracturing fluid: 1. The fracturing fluid base fluid in the oilfield site often contains impurities such as silt. If it is directly mixed with nanomaterials, it will cause agglomeration of nanometer particles and uneven dispersion. At the same time, the impurities may block the pores of the formation, reducing the fracturing effect. Moreover, the existing filtering equipment mostly uses single filter screen or fixed pore size filtering structure, which is difficult to achieve fine grading filtration, and the filter screen is easy to be blocked by impurities, so it needs to be frequently stopped for disassembly and cleaning, affecting the continuity of operation.

[0004] 2. The backwashing function of the traditional filtering equipment mostly depends on the external flushing water source, which not only increases the operation cost, but also has the problem of incomplete flushing. Some equipment needs to be manually disassembled and cleaned, which is complicated and time-consuming, especially in the wild oilfield environment, the maintenance difficulty is greater. Therefore, it is necessary to provide an oilfield nanometer rig-mounted device and a mixing method to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides an oilfield nanometer rig-mounted device and a mixing method.

[0006] The oilfield nanometer rig-mounted device provided by the present application comprises a support frame, a mixing box and a treatment unit are fixedly installed on the support frame, a stirring unit is installed in the mixing box, a feeding hopper in communication with the inside of the mixing box is fixedly connected to the top of the mixing box, and a blowdown unit and a plugging unit are installed on the treatment unit; The treatment unit comprises a filter backwashing component, a driving component and a water supply component; The filter backflush component comprises a filter box, a plurality of filter frames are fixedly connected to the inner side of the filter box at equal distances, two filter screens are fixedly connected to the filter frames symmetrically and penetratively, a water feeding pipe is communicated with the inlet end of the filter box, two water collecting covers are symmetrically arranged on the side of the filter screen away from the water feeding pipe, the interior of the water collecting cover is hollow, the two water collecting covers are symmetrically arranged on the two sides of the interior of the filter box, a plurality of water outlet holes are formed on the opposite side of the water collecting cover and communicated with the interior of the water collecting cover, a flushing vertical pipe is fixedly connected to the bottom of the water collecting cover and communicated with the interior of the water collecting cover, the flushing vertical pipe is sealingly and rotatably connected to the bottom of the filter box, the bottom end of the flushing vertical pipe extends to the lower side of the filter box after penetrating through the filter box, a horizontal rod is fixedly sleeved on the outer side of the flushing vertical pipe, and an eccentric column is fixedly connected to the bottom of one end of the horizontal rod.

[0007] Preferably, the driving component comprises an electric cylinder, a horizontal moving frame is fixedly connected to the telescopic end of the electric cylinder, a plurality of long slot holes are longitudinally formed on the horizontal moving frame, the eccentric columns are slidingly arranged in the corresponding long slot holes.

[0008] Preferably, the water supply component comprises a water collecting tank, the water collecting tank is fixedly connected to the upper side of one side of the mixing tank, an overflow port is formed on the upper side of one side of the water collecting tank and communicated with the interior of the mixing tank, a backflush conveying pump is fixedly installed on the support frame, a first communicating pipe is communicated with the water inlet end of the backflush conveying pump, one end of the first communicating pipe penetrates through the lower side of one side of the water collecting tank and is communicated with the interior of the water collecting tank, a multi-way pipe is communicated with the water outlet end of the backflush conveying pump, a rotating joint is fixedly installed on the bottom end of the flushing vertical pipe and communicated with the interior of the flushing vertical pipe, the bottom end of the rotating joint is fixedly connected with the multi-way pipe and communicated with the interior of the multi-way pipe, a second communicating pipe is communicated with the outlet end of the filter box, and the bottom end of the second communicating pipe penetrates through the top of the water collecting tank and is communicated with the interior of the water collecting tank.

[0009] Preferably, the water inlet pump is fixedly installed on the support frame, the water outlet end of the water inlet pump is communicated with one end of the water feeding pipe, a total water inlet pipe is communicated with the water inlet end of the water inlet pump, the mesh hole diameters of the filter screens on the filter frames close to and away from the water feeding pipe are sequentially reduced, a discharge pipe is fixedly communicated with the bottom of the mixing tank, and a valve is installed on the discharge pipe.

[0010] Preferably, the blowdown unit comprises a blowdown component and an opening and closing component, the blowdown component comprises a blowdown hopper, the blowdown hopper is fixedly connected at the bottom of the filter box, the blowdown hopper is arranged below the side of the filter frame close to the water supply pipe, the blowdown hopper is communicated with the inside of the filter box through the top opening, the blowdown hopper is communicated with the blowdown vertical pipe at the lower side, the blowdown vertical pipe is provided with an avoiding slot, the opening and closing component comprises a rotary valve plate, the rotary valve plate is sealingly and slidingly arranged in the avoiding slot, the rotary valve plate is longitudinally provided with a communication opening with the same aperture as the inside of the blowdown vertical pipe, and the rotary valve plate is fixedly sleeved on the outside of the flushing vertical pipe.

[0011] Preferably, the stirring unit comprises a stirring motor, the stirring motor is fixedly installed at the top of the mixing box, the inside of the mixing box is rotationally connected with a stirring vertical shaft, the top end of the stirring vertical shaft is fixedly connected with the rotating end of the stirring motor after penetrating through the top of the mixing box, and a plurality of stirring blades are uniformly and fixedly connected on the rod wall in the inside of the mixing box.

[0012] Preferably, the blocking unit comprises a blocking component and an opening component, the blocking component comprises a baffle, the baffle is arranged on the inside of the water collecting cover and is sealingly and slidingly attached to the inner wall of the side of the water collecting cover provided with the water outlet hole, two sliding strips are symmetrically and fixedly connected on the inner wall of the water collecting cover, the two sides of the baffle are slidingly connected with the two sliding strips, and a through hole is transversely and penetratingly arranged on the baffle and corresponds to the water outlet hole.

[0013] Preferably, the opening component comprises a supporting block, the supporting block is fixedly connected on the upper side wall of the baffle, a lifting rod is fixedly connected on the top of the supporting block, the top end of the lifting rod is rotationally connected with a moving wheel after penetrating through the top of the water collecting cover, the lifting rod is slidingly connected on the water collecting cover, a spring is sleeved on the outside of the lifting rod, the top end of the spring is fixedly connected with the inside top of the water collecting cover, the bottom end of the spring is fixedly connected with the top of the supporting block, the inside top of the filter box is fixedly connected with a guide block corresponding to and matched with the moving wheel, the bottom of the guide block is provided with an inclined guide portion and a horizontal guide portion, and the bottom end of the inclined guide portion corresponds to one end of the horizontal guide portion.

[0014] The application also provides a mixing method of the oil field nano rig-mounted equipment. Step one: the fracturing fluid base fluid is delivered to the filter box through the total water inlet pipe, is filtered by the filter screens on the multi-stage filter frames in stages, enters the water collecting tank through the second communication pipe, and flows into the mixing box when the base fluid in the water collecting tank exceeds the height of the overflow port; Step two: the nano material is added to the feeding hopper so as to fall into the mixing box, the stirring unit is started to stir and mix uniformly, and then is discharged through the discharge pipe; Step three: when the filter screen needs to be cleaned, the electric cylinder of the driving part is started, the extension end of the electric cylinder is elongated to drive the horizontal moving frame to move, the eccentric column drives the flushing vertical pipe to rotate, the water collecting cover is turned to be attached to the filter frame, the communication opening of the rotary valve plate is communicated with the blowdown vertical pipe, and the communication hole of the baffle is corresponded to the water outlet hole; Step four: the backflushing pump is started, the base fluid in the water collecting tank is sent to the water collecting cover through the multi-way pipe and the flushing vertical pipe, the filter screen is flushed through the water outlet hole, and the impurities are discharged through the collecting hopper and the blowdown vertical pipe. Step five: after the cleaning is completed, the electric cylinder drives the horizontal moving frame to reset, the flushing vertical pipe is reversely rotated, the water collecting cover is reset, the rotary valve plate blocks the blowdown vertical pipe, the baffle blocks the water outlet hole, and the filtering is restored.

[0015] Preferably, when the extension end of the electric cylinder is elongated to drive the horizontal moving frame to move, the eccentric column drives the flushing vertical pipe to rotate by 90 degrees and then stop.

[0016] Compared with the related art, the oil field nano skid-mounted equipment and mixing method provided by the application has the following beneficial effects: 1. By arranging a plurality of filter frames in the filter backflushing part, and gradually reducing the mesh size of the filter screen on the filter frame close to the water supply pipe, the fracturing fluid base fluid can be finely filtered step by step, different sizes of impurities can be effectively removed, the cleanliness of the base fluid entering the mixing box can be greatly improved, the uniform mixing of the nano material and the base fluid is laid a foundation, and the use effect of the mixed liquid is ensured.

[0017] 2. The driving part of the processing unit cooperates with the filter backflushing part and the water supply part to realize automatic backflushing cleaning of the filter screen. When cleaning is needed, the electric cylinder drives the horizontal moving frame to move, the flushing vertical pipe is rotated through the cooperation of the eccentric column and the long slot hole, the water collecting cover is rotated to be attached to the filter frame, the backflushing pump sends the clean base fluid in the water collecting tank to the water collecting cover through the multi-way pipe and the flushing vertical pipe, and the filter screen is flushed through the water outlet hole. In this process, the impurities on the filter screen can be removed without disassembling the equipment, blockage is avoided, and the service life of the filter screen and the whole equipment is prolonged.

[0018] 3. The clean base fluid filtered by the water collecting tank can be used for backflushing cleaning of the filter screen, the existing resources are utilized, and there is no need to prepare flushing liquid separately, so that the use is more convenient.

[0019] 4. In the blowdown unit, the collecting hopper can pre-collect the impurities generated during filtering. During backflushing, the flushing vertical pipe drives the rotary valve plate to rotate, the communication opening is communicated with the blowdown vertical pipe, the impurities are discharged in time with the backflushing base fluid, and the accumulation of the impurities is avoided to affect the backflushing effect.

[0020] 5、The blocking unit realizes automatic switching through the cooperation of the baffle and the sliding bar: when filtering, the spring pulls the baffle to block the water outlet hole, preventing the base liquid from entering the water collecting cover; when backwashing, the moving wheel moves along the inclined guide part of the guide block, drives the baffle to move downward, makes the connecting hole correspond to the water outlet hole, ensures that the backwashing liquid is smoothly sprayed out, and improves the operation efficiency of the equipment.

[0021] 6、The feeding hopper at the top of the mixing box is convenient for adding nano materials, the stirring motor drives the stirring vertical shaft and the stirring blades to rotate at high speed, the base liquid and the nano materials can be quickly and uniformly mixed, and the mixed liquid is directly discharged through the discharge pipe, meeting the needs of rapid mixing on the oilfield site.

[0022] 7、The equipment is integrated and fixed on the support frame, forming a skid-mounted structure, the overall volume is compact, transportation is convenient, and the oilfield field operation environment can be flexibly adapted, and the convenience of on-site operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The overall structure schematic diagram of the oilfield nano skid-mounted equipment provided by the present application is provided. Figure 2 The overall sectional view of the oilfield nano skid-mounted equipment in the present application is provided. Figure 3 The sectional view of the filter box in the present application is provided. Figure 4 The structure schematic diagram of the driving part in the present application is provided. Figure 5 The structure schematic diagram of the processing unit in the present application is provided. Figure 6 The structure schematic diagram of the transverse moving frame in the present application is provided. Figure 7 The structure schematic diagram of the filter frame in the present application is provided. Figure 8 The structure schematic diagram of the rotary valve plate in the present application is provided. Figure 9 The structure schematic diagram of the blow-off part in the present application is provided. Figure 10 The local structure schematic diagram in the present application is provided. Figure 11 The structure schematic diagram of the water cover after being cut open in the present application is provided. Figure 12 The enlarged view of A in the present application is provided. Figure 13 The structure schematic diagram of the blocking part in the present application is provided. Figure 14 The local structure schematic diagram of the filter box after being cut open in the present application is provided. Figure 15 The structure schematic diagram of the guide block in the present application is provided.

[0024] Reference numerals: 1, support frame; 2, mixing box; 3, stirring unit; 301, stirring motor; 302, stirring vertical shaft; 303, stirring blade; 4, treatment unit; 41, filter backflushing component; 411, filter frame; 412, filter screen; 413, water collecting cover; 414, water outlet hole; 415, flushing vertical pipe; 416, cross bar; 417, eccentric column; 418, filter box; 42, driving component; 421, electric cylinder; 422, transverse moving frame; 423, long slot hole; 43, water supply component; 431, rotating joint; 432, multi-way pipe; 433, backflushing delivery pump; 434, first communication pipe; 435, water collecting tank; 436, overflow; 437, second communication pipe; 5, water inlet pump; 6, feeding hopper; 7, water delivery pipe; 8, sewage discharge unit; 81, sewage discharge component; 811, sewage collecting hopper; 812, sewage vertical pipe; 813, avoiding notch; 82, opening and closing component; 821, rotating valve plate; 822, communication opening; 9, blocking unit; 91, blocking component; 911, baffle; 912, connecting hole; 913, sliding bar; 92, opening component; 921, supporting block; 922, lifting rod; 923, spring; 924, moving wheel; 925, guide block; 9251, inclined guide part; 9252, horizontal guide part; 10, total water inlet pipe; 11, discharge pipe. DETAILED DESCRIPTION

[0025] The application will be further described below in connection with the drawings and examples.

[0026] Example 1 Please see Figures 1 to 8The utility model provides an oilfield nanometer rig-mounted equipment, including support frame 1, fixed mounting has mixed box 2 and processing unit 4 on support frame 1, install stirring unit 3 in mixed box 2, the top of mixed box 2 is fixedly connected with the feeding hopper 6 that communicates with its inside, and the processing unit 4 is installed with blowdown unit 8 and plugging unit 9, processing unit 4 includes filter backflushing part 41, drive part 42 and water supply part 43, filter backflushing part 41 includes filter box 418, the inside of filter box 418 is fixedly connected with a plurality of filter frame 411 at equal distance, two filter screens 412 are fixedly connected in the symmetry through on filter frame 411, the import end of filter box 418 is communicated with water supply pipe 7, two water collecting caps 413 are symmetrically arranged on the side away from water supply pipe 7 of filter screen 412, the inside of water collecting cap 413 is hollow, two water collecting caps 413 are symmetrically arranged in the inside two sides of filter box 418, a plurality of water outlets 414 are formed in the opposite side of two water collecting caps 413 and communicated with the inside, the water outlet 414 is communicated with the inside of water collecting cap 413, the bottom of water collecting cap 413 is fixedly connected with flush vertical pipe 415 communicated with its inside, flush vertical pipe 415 is sealingly rotatably connected at the bottom of filter box 418, flush vertical pipe 415 can be rotatably connected with the bottom of filter box 418 through sealing bearing, flush vertical pipe 415 bottom end passes through filter box 418 and extends below, the outside of flush vertical pipe 415 is fixedly sleeved with cross bar 416, and the bottom of one end of cross bar 416 is fixedly connected with eccentric column 417.

[0027] In the above, through the setting of filter backflushing part 41, the filter screen 412 on the plurality of filter frames 411 filters the fracturing fluid base fluid, and the structures such as water collecting cap 413 and flush vertical pipe 415 provide a basis for subsequent backflushing and cleaning of the filter screen 412, the filter screen 412 of the multi-stage filter frame 411 performs multi-stage filtration, improves the filtration effect, makes the filtered base fluid cleaner, the hollow design of the water collecting cap 413 and the water outlet 414 can spray liquid during backflushing, backflushes the filter screen 412, the sealing rotatable connection of the flush vertical pipe 415 not only ensures liquid delivery but also makes the rotation of the water collecting cap 413 possible, the cross bar 416 and the eccentric column 417 provide a stress point for the drive part 42 to drive the flush vertical pipe 415 to rotate, and the overall structure lays a foundation for graded filtration and automatic backflushing.

[0028] Further, the drive part 42 includes an electric cylinder 421, the telescopic end of the electric cylinder 421 is fixedly connected with a horizontal moving frame 422, a plurality of long slot holes 423 are longitudinally and throughly formed on the horizontal moving frame 422, the long slot holes 423 are correspondingly arranged and adapted with the eccentric column 417, the eccentric column 417 is slidingly arranged in the corresponding long slot hole 423, and the long slot hole 423 is adapted with the eccentric column 417, and the length thereof meets the movement space requirement of the eccentric column 417.

[0029] In the above, the electric cylinder 421 of the driving component 42 serves as a power source, and drives the transverse frame 422 to move stably through the telescopic end. The long slot hole 423 on the transverse frame 422 cooperates with the eccentric column 417 to convert the linear motion of the transverse frame 422 into the rotary motion of the eccentric column 417, thereby driving the flushing vertical pipe 415 to rotate and realizing the position switching of the water collecting cover 413. No manual operation is required, the degree of automation is high, and the cooperation of the long slot hole 423 and the eccentric column 417 can ensure the stability and accuracy of the motion transmission, so as to ensure that the water collecting cover 413 can accurately adhere to the filtering frame 411 during backwashing, improve the backwashing effect, and the contact surface of the water collecting cover 413 and the filtering frame 411 can be provided with a sealing strip to increase the sealing performance.

[0030] Further, the water supply component 43 includes a water collecting tank 435 fixedly connected to the upper side of the mixing tank 2. The upper side of the water collecting tank 435 is provided with an overflow port 436 in communication with the inside of the mixing tank 2. The backwashing delivery pump 433 is fixedly installed on the support frame 1. The water inlet end of the backwashing delivery pump 433 is in communication with the first communication pipe 434. One end of the first communication pipe 434 penetrates through the lower side of the water collecting tank 435 and is in communication with the inside thereof. The water outlet end of the backwashing delivery pump 433 is in communication with the multi-way pipe 432. The bottom end of the flushing vertical pipe 415 is fixedly installed with the rotating joint 431 in communication with the inside thereof. The bottom end of the rotating joint 431 is fixedly connected with the multi-way pipe 432 and is in communication with the inside thereof. The outlet end of the filtering tank 418 is in communication with the second communication pipe 437. The bottom end of the second communication pipe 437 penetrates through the top of the water collecting tank 435 and is in communication with the inside thereof.

[0031] In the above, the water collecting tank 435 of the water supply component 43 can store the filtered clean fracturing fluid base fluid to provide water source for backwashing, without the need of additional external flushing fluid, saving cost. The overflow port 436 can ensure that there is always enough base fluid in the water collecting tank 435, which not only meets the backwashing demand, but also sends the excess base fluid into the mixing tank 2 for mixing use. The backwashing delivery pump 433 extracts the base fluid in the water collecting tank 435 through the first communication pipe 434, and delivers it to the flushing vertical pipe 415 through the multi-way pipe 432 and the rotating joint 431. The setting of the rotating joint 431 ensures that the flushing vertical pipe 415 rotates while maintaining communication with the multi-way pipe 432.

[0032] Further, the water supply component 43 includes a water collecting tank 435 fixedly connected to the upper side of the mixing tank 2. The upper side of the water collecting tank 435 is provided with an overflow port 436 in communication with the inside of the mixing tank 2. The backwashing delivery pump 433 is fixedly installed on the support frame 1. The water inlet end of the backwashing delivery pump 433 is in communication with the first communication pipe 434. One end of the first communication pipe 434 penetrates through the lower side of the water collecting tank 435 and is in communication with the inside thereof. The water outlet end of the backwashing delivery pump 433 is in communication with the multi-way pipe 432. The bottom end of the flushing vertical pipe 415 is fixedly installed with the rotating joint 431 in communication with the inside thereof. The bottom end of the rotating joint 431 is fixedly connected with the multi-way pipe 432 and is in communication with the inside thereof. The outlet end of the filtering tank 418 is in communication with the second communication pipe 437. The bottom end of the second communication pipe 437 penetrates through the top of the water collecting tank 435 and is in communication with the inside thereof.

[0033] The water inlet pump 5 provides power for the delivery of the fracturing fluid base fluid, and the base fluid is stably sent into the filter box 418 through the total water inlet pipe 10 and the water delivery pipe 7, ensuring the continuous progress of the filtering process. The mesh size of the filter screen 412 decreases from the side close to the water delivery pipe 7 to the side far from the water delivery pipe 7, achieving the fine filtering of the base fluid in stages, removing large-particle impurities first, and then filtering small-particle impurities, greatly improving the filtering effect and avoiding the influence of impurities on the subsequent mixing of nano materials. The discharge pipe 11 and the valve at the bottom of the mixing box 2 facilitate the control of the discharge of the mixed solution.

[0034] Embodiment two Further, referring to Figures 1 to 11 On the basis of embodiment one, the pollution discharge unit 8 includes a pollution discharge component 81 and an opening and closing component 82. The pollution discharge component 81 includes a pollution collection bucket 811, which is fixedly connected to the bottom of the filter box 418. The pollution collection bucket 811 is arranged below the side of the filter frame 411 close to the water delivery pipe 7. The pollution collection bucket 811 is in communication with the inside of the filter box 418 through the top opening. The lower part of one side of the pollution collection bucket 811 is in communication with a pollution discharge vertical pipe 812. The pollution discharge vertical pipe 812 is provided with an avoidance slot 813.

[0035] In the above, the pollution collection bucket 811 of the pollution discharge component 81 is arranged corresponding to the filter frame 411, which can collect the impurities intercepted by the filter screen 412 in advance during the filtering process, avoiding the accumulation of impurities in the filter box 418 and affecting the filtering efficiency. The pollution discharge vertical pipe 812 provides a channel for the discharge of impurities, and the avoidance slot 813 provides a movement space for the rotating valve plate 821 of the opening and closing component 82, ensuring that the rotating valve plate 821 can smoothly realize the on-off control of the pollution discharge vertical pipe 812, keeping the inside of the filter box 418 clean. The top and bottom of the rotating valve plate 821 can be provided with rubber sealing pads to increase the sealing performance.

[0036] Further, the opening and closing component 82 includes a rotating valve plate 821, which is sealingly and slidingly arranged in the avoidance slot 813. A communication opening 822 equal in size to the inside diameter of the pollution discharge vertical pipe 812 is longitudinally and penetratingly arranged on the rotating valve plate 821. The rotating valve plate 821 is fixedly sleeved outside the flushing vertical pipe 415.

[0037] In the above, the rotating valve plate 821 of the opening and closing component 82 is fixedly sleeved outside the flushing vertical pipe 415, which can rotate synchronously with the flushing vertical pipe 415. When the communication opening 822 is aligned with the pollution discharge vertical pipe 812, the impurities in the pollution collection bucket 811 can be timely discharged. When the rotating valve plate 821 is rotated to misalign the communication opening 822 with the pollution discharge vertical pipe 812, the pollution discharge vertical pipe 812 can be sealed and blocked, preventing the base fluid from leaking during filtering. This design realizes the synchronous linkage of the pollution discharge and backwashing processes, without the need for additional power control, simplifying the operation and improving the automation level of the equipment.

[0038] Further, the stirring unit 3 comprises a stirring motor 301 fixedly installed at the top of the mixing box 2, a stirring vertical shaft 302 rotatably connected inside the mixing box 2, and a plurality of stirring blades 303 uniformly fixedly connected to the rod wall inside the mixing box 2.

[0039] In the above, the stirring motor 301 of the stirring unit 3 provides power to drive the stirring vertical shaft 302 and the stirring blades 303 to rotate, so that the fracturing fluid base fluid and the nano material in the mixing box 2 can be quickly and uniformly stirred and mixed, the nano material is prevented from agglomerating, the dispersion of the nano particles is ensured, the performance of the nano fracturing fluid is improved, the uniform distribution of the stirring blades 303 enhances the comprehensiveness of the stirring, the mixing effect of each region in the mixing box 2 is ensured to be consistent, and the needs of rapid and efficient mixing on the oilfield site are met.

[0040] Embodiment Three Further, referring to Figures 1 to 15 On the basis of Embodiment Two, the plugging unit 9 comprises a blocking component 91 and an opening component 92. The blocking component 91 comprises a baffle 911 arranged on the inner side of the water collecting cover 413 and in sliding sealing fit with the inner wall of the side of the water collecting cover 413 where the water outlet hole 414 is formed. Two slide bars 913 are symmetrically fixedly connected to the inner wall of the water collecting cover 413. The cross section of the slide bar 913 is in the shape of “L”. The two side edges of the baffle 911 are respectively arranged in sliding fit in the “L”-shaped groove of the slide bar 913. The two side edges of the baffle 911 are in sliding connection with the two slide bars 913. A through hole 912 corresponding to the water outlet hole 414 is transversely formed in the baffle 911.

[0041] In the above, the baffle 911 of the blocking component 91 is in sliding sealing fit with the inner wall of the water collecting cover 413. The alignment or misalignment of the through hole 912 and the water outlet hole 414 is realized by sliding on the slide bar 913. During filtration, the baffle 911 blocks the water outlet hole 414 to prevent the base fluid from entering the water collecting cover 413 and affecting the filtration. During backwashing, the through hole 912 is aligned with the water outlet hole 414 to ensure that the backwashing liquid is smoothly sprayed out to wash the filter screen 412. The arrangement of the slide bar 913 ensures the stability of the sliding of the baffle 911, the sealing fit prevents liquid leakage, and the reliability of the equipment is improved.

[0042] Further, the opening component 92 comprises a supporting block 921 fixedly connected to the upper side wall of the baffle 911, a lifting rod 922 fixedly connected to the top of the supporting block 921, a moving wheel 924 rotatably connected to the top end of the lifting rod 922 penetrating through the top of the water collecting cover 413, the lifting rod 922 slidingly connected to the water collecting cover 413, a spring 923 sleeved outside the lifting rod 922, the top end of the spring 923 fixedly connected to the inner top of the water collecting cover 413, the bottom end of the spring 923 fixedly connected to the top of the supporting block 921, a guide block 925 corresponding to the moving wheel 924 and fixedly connected to the inner top of the filter box 418, the guide block 925 provided with a slant guide portion 9251 and a horizontal guide portion 9252 at the bottom, the bottom end of the slant guide portion 9251 corresponding to one end of the horizontal guide portion 9252.

[0043] In the above, the moving wheel 924 of the opening component 92 cooperates with the guide block 925, when the water collecting cover 413 rotates, the moving wheel 924 moves along the slant guide portion 9251, drives the lifting rod 922 and the supporting block 921 to move downward, realizes the alignment of the through hole 912 and the water outlet hole 414, the horizontal guide portion 9252 keeps the position of the baffle 911 when back flushing, the spring 923 provides pulling force when the water collecting cover 413 resets, moves the baffle 911 upward to block the water outlet hole 414, this design realizes the automatic switching of the baffle 911 without manual operation, linkage with the rotation of the water collecting cover 413, ensures the accurate switching of the back flushing and filtering state, improves the operation efficiency of the equipment.

[0044] Embodiment four Further, please refer to Figures 1 to 15 A mixing method of the oil field nano rig-mounted equipment, the method steps are as follows: Step one: the pipeline outside for extracting fracturing fluid base fluid is communicated with the bottom end of the total water inlet pipe 10, the water inlet pump 5 is started, the fracturing fluid base fluid outside is transported into the filter box 418 through the total water inlet pipe 10 and the water delivery pipe 7, the base fluid is filtered by the filter screens 412 of the multiple groups of upper filter frames 411 in turn, the filtering order is from the filter screen 412 with large mesh size to the filter screen 412 with small mesh size, the clean base fluid after filtering enters the water collecting tank 435 through the second communication pipe 437, when the liquid level of the base fluid in the water collecting tank 435 reaches the height of the overflow port 436, the base fluid exceeding the height flows into the mixing box 2 through the overflow port 436.

[0045] Step two: according to the proportioning needs, add the appropriate amount of powder nano material mixed with the base liquid in the mixing box 2 into the feeding hopper 6, the nano material falls into the mixing box 2 through the feeding hopper 6, start the stirring motor 301 in the stirring unit 3, rotate the stirring vertical shaft 302 through the stirring motor 301, the stirring vertical shaft 302 drives the stirring blade 303 to rotate synchronously, and the stirring blade 303 stirs and uniformly mixes the base liquid and the nano material in the mixing box 2, then open the discharge pipe 11, and the mixed liquid of the mixed base liquid and the nano material is discharged through the discharge pipe 11 for use.

[0046] Step three: when the filter screen 412 needs to be cleaned after long-term use, start the electric cylinder 421 of the driving component 42, drive the horizontal moving frame 422 to move towards the water supply pipe 7 through the extension of the telescopic end of the electric cylinder 421, and the eccentric column 417 moves in the long slot hole 423 while the horizontal moving frame 422 moves, the horizontal moving frame 422 drives the eccentric column 417 to rotate the horizontal rod 416 and drive the flushing vertical pipe 415 to rotate, because the flushing vertical pipe 415 and the multi-way pipe 432 are connected through the rotating joint 431, the flushing vertical pipe 415 can keep the communication effect with the multi-way pipe 432 while rotating, the flushing vertical pipe 415 drives the water collecting cover 413 to rotate by 90°, and the water collecting cover 413 rotates from the state of being perpendicular to the filter frame 411 to the state of being parallel to the filter frame 411, and one side of the water collecting cover 413 is sealed and fitted on one side of the filter frame 411, and the water outlet hole 414 on the water collecting cover 413 corresponds to the filter screen 412.

[0047] At the same time, the water collecting cover 413 drives the moving wheel 924 to move in the rotating process, when the moving wheel 924 moves to contact the inclined guide part 9251 of the guide block 925, under the guidance of the inclined guide part 9251, the moving wheel 924 moves downward in the movement process driven by the water collecting cover 413, and then the lifting rod 922 slides downward, the lifting rod 922 drives the supporting block 921 to make the baffle 911 slide downward on the slide bar 913, and the spring 923 is elastically stretched until the water collecting cover 413 abuts against the filter frame 411, at this time, the moving wheel 924 moves from the inclined guide part 9251 to the horizontal guide part 9252, the moving wheel 924 abuts against the horizontal guide part 9252, and the baffle 911 is kept at the current height, and the through hole 912 on the baffle 911 corresponds to the water outlet hole 414 on the water collecting cover 413 one by one.

[0048] At the same time, the flushing vertical pipe 415 drives the rotating valve plate 821 of the opening and closing component 82 to rotate synchronously in the rotating process, so that the rotating valve plate 821 rotates by 90°, at this time, the communication opening 822 just corresponds to the inside of the blowdown vertical pipe 812, and the impurities collected in the dirt collecting hopper 811 are discharged through the blowdown vertical pipe 812.

[0049] Step four: start the back flushing pump 433, the back flushing pump 433 draws the filtered base fluid in the water collecting tank 435 through the first communication pipe 434, and then through the multi-way pipe 432, the rotating joint 431 and the flushing vertical pipe 415 to the water collecting cover 413, the base fluid in the water collecting cover 413 is sprayed out through the water outlet hole 414 to flush the corresponding filter screen 412, most of the impurities on the filter screen 412 are flushed and fall down, and the impurities and the base fluid fall into the dirt collecting hopper 811 below and are discharged through the dirt discharging vertical pipe 812.

[0050] Step five: after the cleaning is completed, the back flushing pump 433 is closed, the extension end of the electric cylinder 421 is retracted to reset the horizontal moving frame 422, so that the flushing vertical pipe 415 is rotated reversely by 90° to reset, the water collecting cover 413 is adjusted to be perpendicular to the filter frame 411 again, and the water collecting cover 413 does not block the process of the filter screen 412.

[0051] At the same time, after the water collecting cover 413 is reset, the moving wheel 924 is separated from the corresponding guide block 925, the elastic potential energy of the spring 923 is released, the bracket 921 is pulled to move the baffle 911 upward, the baffle 911 drives the connecting hole 912 to be disengaged from the water outlet hole 414, the baffle 911 seals the water outlet hole 414 at this time, and the base fluid is prevented from entering the water collecting cover 413 through the water outlet hole 414 during the filtering.

[0052] At the same time, the flushing vertical pipe 415 is reversely rotated by 90° to drive the rotating valve plate 821 to rotate synchronously, so that the rotating valve plate 821 seals the inside of the dirt discharging vertical pipe 812, and the base fluid impurities cannot be discharged through the dirt discharging vertical pipe 812 at this time.

[0053] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent flow conversion according to the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. An oilfield nanostick, comprising a support frame (1), characterized in that, The support frame (1) is fixedly installed with a mixing box (2) and a treatment unit (4), the mixing box (2) is installed with a stirring unit (3), the top of the mixing box (2) is fixedly connected with a feeding hopper (6) in communication with the inside of the mixing box (2), and the treatment unit (4) is installed with a blowdown unit (8) and a blocking unit (9); The treatment unit (4) comprises a filter backflushing part (41), a driving part (42) and a water supply part (43); The filter backflushing part (41) comprises a filter box (418), a plurality of filter frames (411) are fixedly connected at equal distances on the inner side of the filter box (418), two filter screens (412) are fixedly connected in symmetry on the filter frames (411), a water supply pipe (7) is in communication with the inlet end of the filter box (418), two water collecting covers (413) are symmetrically arranged on the side, away from the water supply pipe (7), of the filter screen (412), the inside of the water collecting cover (413) is hollow, the two water collecting covers (413) are symmetrically arranged on the two sides of the inside of the filter box (418), a plurality of water outlet holes (414) in communication with the inside of the water collecting cover (413) are formed on the opposite sides of the two water collecting covers (413), the water outlet holes (414) are in communication with the inside of the water collecting cover (413), a flushing vertical pipe (415) in communication with the inside of the water collecting cover (413) is fixedly connected to the bottom of the water collecting cover (413), the flushing vertical pipe (415) is sealingly rotatably connected to the bottom of the filter box (418), the flushing vertical pipe (415) extends to below the filter box (418) after penetrating through the filter box (418), a cross rod (416) is fixedly sleeved on the outer side of the flushing vertical pipe (415), and an eccentric column (417) is fixedly connected to the bottom of one end of the cross rod (416).

2. The oilfield nanostick according to claim 1, wherein, The driving part (42) comprises an electric cylinder (421), a horizontal moving frame (422) is fixedly connected to the telescopic end of the electric cylinder (421), a plurality of long slot holes (423) are longitudinally and vertically formed on the horizontal moving frame (422), the eccentric column (417) is correspondingly and adaptively arranged in the long slot hole (423), and the eccentric column (417) is slidingly arranged in the corresponding long slot hole (423).

3. The oilfield nanostick according to claim 2, wherein, The water supply component (43) comprises a water collecting tank (435) fixedly connected to the upper side of the mixing box (2), the upper side of the water collecting tank (435) is provided with an overflow opening (436) in communication with the inside of the mixing box (2), the support frame (1) is fixedly provided with a backflushing delivery pump (433), the water inlet end of the backflushing delivery pump (433) is communicated with a first communication pipe (434), one end of the first communication pipe (434) penetrates through the lower side of the water collecting tank (435) and is in communication with the inside of the water collecting tank (435), the water outlet end of the backflushing delivery pump (433) is communicated with a multi-way pipe (432), the bottom end of the flushing vertical pipe (415) is fixedly provided with a rotating joint (431) in communication with the inside of the flushing vertical pipe (415), the bottom end of the rotating joint (431) is fixedly connected with the multi-way pipe (432) and is in communication with the inside of the multi-way pipe (432), the outlet end of the filter box (418) is communicated with a second communication pipe (437), the bottom end of the second communication pipe (437) penetrates through the top of the water collecting tank (435) and is in communication with the inside of the water collecting tank (435).

4. The oilfield nanostick according to claim 3, wherein, The water inlet pump (5) is fixedly installed on the support frame (1), the water outlet end of the water inlet pump (5) is communicated with one end of the water delivery pipe (7), the water inlet end of the water inlet pump (5) is communicated with a total water inlet pipe (10), the mesh aperture of the filter screen (412) on the filter frame (411) gradually decreases from the side close to the water delivery pipe (7) to the side far from the water delivery pipe (7), the bottom of the mixing box (2) is fixedly communicated with a discharge pipe (11), and the discharge pipe (11) is provided with a valve.

5. The oilfield nanostick apparatus of claim 4, wherein, The sewage discharge unit (8) comprises a sewage discharge component (81) and an opening and closing component (82), the sewage discharge component (81) comprises a sewage collecting hopper (811), the sewage collecting hopper (811) is fixedly connected to the bottom of the filter box (418), the sewage collecting hopper (811) is arranged in one-to-one correspondence with the filter frame (411), the sewage collecting hopper (811) is arranged below the side of the filter frame (411) close to the water delivery pipe (7), the sewage collecting hopper (811) is in communication with the inside of the filter box (418) through the top opening, the lower side of the sewage collecting hopper (811) is communicated with a sewage discharge vertical pipe (812), the sewage discharge vertical pipe (812) is provided with an avoiding slot (813), the opening and closing component (82) comprises a rotary valve plate (821), the rotary valve plate (821) is sealingly and slidingly arranged in the avoiding slot (813), the rotary valve plate (821) is longitudinally and through-provided with a communication opening (822) with the same aperture as the inside of the sewage discharge vertical pipe (812), and the rotary valve plate (821) is fixedly sleeved on the outside of the flushing vertical pipe (415).

6. An oilfield nanostick apparatus as defined in claim 5, wherein, The stirring unit (3) comprises a stirring motor (301) fixedly installed on the top of the mixing box (2), a stirring vertical shaft (302) rotationally connected in the mixing box (2), and a plurality of stirring blades (303) fixedly connected to the stirring vertical shaft (302) on the rod wall in the mixing box (2).

7. An oilfield nanostick apparatus as defined in claim 6, wherein, The blocking unit (9) comprises a blocking component (91) and an opening component (92), the blocking component (91) comprises a baffle (911) arranged on the inner side of the water collecting cover (413) and in sliding sealing contact with the inner wall of the side of the water collecting cover (413) where the water outlet hole (414) is formed, two slide bars (913) are symmetrically fixedly connected to the inner wall of the water collecting cover (413), the two sides of the baffle (911) are in sliding connection with the two slide bars (913), and a through hole (912) corresponding to the water outlet hole (414) is formed in the baffle (911).

8. The oilfield nanostick apparatus of claim 7, wherein, The opening component (92) comprises a supporting block (921) fixedly connected to the upper side wall of the baffle (911), a lifting rod (922) fixedly connected to the top of the supporting block (921), a moving wheel (924) rotationally connected to the top end of the lifting rod (922) penetrating through the top of the water collecting cover (413), the lifting rod (922) being in sliding connection with the water collecting cover (413), a spring (923) sleeved on the outer side of the lifting rod (922), the top end of the spring (923) being fixedly connected to the inner top of the water collecting cover (413), the bottom end of the spring (923) being fixedly connected to the top of the supporting block (921), a guide block (925) corresponding to the moving wheel (924) and matched with the moving wheel (924) being fixedly connected to the inner top of the filter box (418), the guide block (925) being provided with an inclined guide portion (9251) and a horizontal guide portion (9252) at the bottom, and the bottom end of the inclined guide portion (9251) corresponding to one end of the horizontal guide portion (9252).

9. A method of mixing and dispensing an oilfield nanostick using an oilfield nanostick as claimed in claim 8, wherein, The method steps are as follows: Step one: the fracturing fluid base fluid is delivered to the filter box (418) through the total water inlet pipe (10), filtered by the filter screens (412) on the multi-stage filter frames (411) in stages, and then enters the water collecting tank (435) through the second communication pipe (437), and when the base fluid in the water collecting tank (435) exceeds the height of the overflow port (436), the base fluid flows into the mixing box (2); Step two: the nano material is added to the feeding hopper (6) and falls into the mixing box (2), the stirring unit (3) is started to stir and mix uniformly, and then is discharged through the discharge pipe (11); Step three: when the filter screen (412) needs to be cleaned, start the electric cylinder (421) of the driving component (42), the extension end of the electric cylinder (421) is elongated to drive the horizontal moving frame (422) to move, the eccentric column (417) drives the flushing vertical pipe (415) to rotate, the water collecting cover (413) is turned to be attached to the filter frame (411), the communication opening (822) of the rotary valve plate (821) is communicated with the blowdown vertical pipe (812), the connecting hole (912) of the baffle (911) corresponds to the water outlet hole (414); Step four: start the backflushing delivery pump (433), the base liquid in the water collecting tank (435) is sent to the water collecting cover (413) through the multi-way pipe (432) and the flushing vertical pipe (415), the filter screen (412) is flushed through the water outlet hole (414), the impurities are discharged through the dirt collecting hopper (811) and the blowdown vertical pipe (812); Step five: after the cleaning is completed, the electric cylinder (421) drives the horizontal moving frame (422) to reset, the flushing vertical pipe (415) is reversely rotated, the water collecting cover (413) is reset, the rotary valve plate (821) blocks the blowdown vertical pipe (812), the baffle (911) blocks the water outlet hole (414), and the filtering is restored.

10. The mixing method for an oilfield nano-skid-mounted equipment according to claim 9, characterized in that, When the extension end of the electric cylinder (421) is elongated to drive the horizontal moving frame (422) to move, the eccentric column (417) drives the flushing vertical pipe (415) to rotate 90° and then stop.

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