Mobile polymer dry powder direct matching viscosity fracturing fluid equipment

Abstract

The utility model discloses a mobile polymer dry powder direct matching viscosity fracturing fluid equipment, by car body and set up pry installation equipment on the car body. Pry installation equipment includes dry powder feeding unit, liquid water delivery unit, venturi mixer, turbulent shear mixer and filter. Liquid water delivery unit and dry powder feeding unit are used to deliver liquid water and polymer dry powder to the venturi mixer, and the liquid outlet of the venturi mixer is connected with the turbulent shear mixer, and the liquid outlet of the turbulent shear mixer is connected with the filter. The dry powder feeding unit comprises a dry powder storage hopper, the lower part of the dry powder storage hopper is conical, the bottom of the cone is a discharge port, the discharge port is connected with a spiral feeder, and the discharge port of the spiral feeder is in communication with the feed inlet on the sidewall of the venturi mixer. The fracturing fluid prepared by the equipment does not produce "fish eye", and the equipment can be pulled to the fracturing site for operation at any time, and is suitable for fracturing operation with short fracturing period and frequent movement.

Description

Technical Field

[0001] This utility model relates to the field of oilfield fracturing technology, and in particular to a mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment. Background Technology

[0002] Hydraulic fracturing is a technology that uses high-pressure fluid to create and open fractures in target rock formations underground. Its core purpose is to establish an efficient flow channel for deeply buried oil and natural gas, allowing it to flow smoothly into the wellbore and ultimately be extracted to the surface. Fracturing fluid is the "blood" of fracturing operations, containing 90% water, approximately 9.5% proppant, and 0.5% chemical additives. Commonly used drag-reducing agents (such as polyacrylamide) can, when added in a certain proportion, increase the viscosity of water, which not only reduces frictional resistance during fluid flow, making pumping more efficient, but also improves the fluid's proppant carrying capacity.

[0003] There are three main methods for formulating polyacrylamide dry powder into fracturing fluid. The first method involves preparing a fracturing masterbatch at a specific viscosity in a factory, transporting it to the fracturing site, and mixing it with proppant in a mixing tank. This method is not only costly to transport but also requires a large number of storage tanks. The second method involves dissolving the dry powder in mineral oil to form an emulsion, storing it in bulk containers at the fracturing site, and adding it to the mixing tank as needed. While this method allows for rapid on-demand preparation of fracturing fluid with a specific viscosity, the introduction of mineral oil, which is unrelated to fracturing, makes flowback fluid treatment more difficult, increases environmental pollution risks, and raises costs. Currently, the most effective method is the third: using a direct-mixing, viscosity-adjustable fracturing fluid equipment. This allows for rapid on-demand preparation of fracturing masterbatch directly from the dry powder at the fracturing site. This method requires less floor space, has a fast viscosity adjustment response, is cost-effective, and allows for the reuse of the generated flowback fluid.

[0004] Currently, the application of polymer dry powder direct-mixing variable viscosity fracturing fluid equipment still faces three key challenges. First, how to ensure the polymer dry powder dissolves quickly and efficiently in water without producing lumpy "fisheye" formations. Because polymer dry powder quickly becomes sticky upon contact with water, it easily clumps together and is difficult to disperse, sometimes encasing the powder in lumps. Second, some fracturing operations have short cycles, require frequent equipment relocation, and are difficult to hoist. Therefore, it is necessary to study how to design the dry powder direct-mixing variable viscosity fracturing fluid equipment as a mobile device that can be moved to the corresponding fracturing site at any time according to operational needs, thereby improving efficiency. Third, how to adapt the dry powder to fracturing flowback fluids from different regions and with different water qualities. The viscosity of the polymer dry powder is affected by factors such as water salinity, pH, metal ions (e.g., calcium, magnesium, iron ions), suspended solids content, and microorganisms. Therefore, it is necessary to modify the polymer dry powder to improve its resistance to interference.

[0005] This invention addresses the first and second key issues by developing a mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment. Summary of the Invention

[0006] To address the issues of fisheye problems and relocation difficulties in polymer dry powder direct-mixing variable viscosity fracturing fluid equipment, this invention provides a mobile polymer dry powder direct-mixing variable viscosity fracturing fluid equipment.

[0007] The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment provided by this utility model consists of a vehicle body and a skid-mounted device installed on the vehicle body. The skid-mounted device includes a dry powder feeding unit, a fluid mixing and delivery unit, a Venturi mixer, a turbulent shear mixer, and a filter; the fluid mixing and delivery unit is connected to the inlet of the Venturi mixer, the dry powder feeding unit is connected to the feed inlet on the side wall of the Venturi mixer, the outlet of the Venturi mixer is connected to the turbulent shear mixer, and the outlet of the turbulent shear mixer is connected to the filter.

[0008] The dry powder feeding unit is located above the Venturi mixer. The dry powder feeding unit includes a dry powder storage hopper, the upper part of which is square; the lower part of which is conical, with the bottom of which is a discharge port. The discharge port is connected to a screw feeder located below it, and the discharge port of the screw feeder is connected to the feed inlet on the side wall of the Venturi mixer; a vibrator A is installed in the middle of the outer side wall of the cone.

[0009] The dry powder storage hopper is equipped with inlet A, inlet B, and a dust purifier at the top. Inlet A is a DN500 inlet. The polymer dry powder is stored in a ton bag, which is lifted to inlet A using a lifting device. Then, the discharge port at the bottom of the ton bag is opened to allow the polymer dry powder to enter the dry powder storage hopper. Inlet B is used to install a DN100 tanker truck pulverizing pipeline. The polymer dry powder is transported to the work site by tanker truck, and the high-pressure airflow from the tanker truck forces the polymer dry powder into the dry powder storage hopper through the pulverizing pipeline. The high-pressure gas carrying dust enters the dust purifier for filtration and dust interception before being discharged. Inlet C is located on the upper part of the outer wall of the cone for manual addition of polymer dry powder. Only one of the three inlets is used, while the other two are sealed.

[0010] The rotation speed of the spiral feeder can be adjusted, and the powder feeding speed can be controlled by its rotation frequency, thereby controlling the feeding speed of polymer dry powder and preparing fracturing fluids of different viscosities.

[0011] The dust purifier includes a rectangular shell with an air inlet on each of the left and right sides of the bottom surface of the shell. Several filter plates are installed in the middle of the shell, and the filter plates are installed at equal intervals parallel to the left and right sides of the shell. All filter plates are located between two air inlets. An air outlet is provided at the top of the shell, and a vibrator B is provided on the outer side wall of the shell.

[0012] The solution preparation water delivery unit includes an inlet pipe and an inlet pump, which delivers the solution preparation water to the Venturi mixer.

[0013] The turbulent shear mixer includes a horizontally placed cylindrical shell with an inlet and an outlet at its left and right ends, respectively. A circular blind plate with a diameter equal to the inner diameter of the shell is installed inside the shell, vertically parallel to the left and right end faces of the shell, dividing the internal space into left and right parts. A through hole is formed in the center of the blind plate, connecting to one end of a guide pipe A. Four through holes are formed around the central through hole, each connecting to a guide pipe B. The four guide pipes B and guide pipe A are located on the same side of the blind plate. Guide pipe A is placed horizontally, and the four guide pipes B are inclined towards guide pipe A, allowing the fluid discharged from guide pipe B to converge with the fluid discharged from guide pipe A. The polymer powder and the prepared water are initially mixed in a Venturi mixer and then enter the turbulent shear mixer. The flow velocity of the mixture increases in guide pipes A and B, and the high-speed fluid undergoes strong turbulent impact at the convergence point, achieving further mixing of the mixture.

[0014] The skid-mounted equipment also includes a generator to provide power to the entire skid-mounted equipment.

[0015] Preferably, the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment of this invention may include two identical fracturing fluid preparation pipelines, one for standby and one for use, or for simultaneous use. The two identical fracturing fluid preparation pipelines share a single dry powder storage hopper. Two parallel cones are arranged at the bottom of the dry powder storage hopper, with the bottom of each cone serving as a discharge port. Each discharge port is connected to a screw feeder, and the discharge ports of the two screw feeders are respectively connected to the inlets on the side walls of two Venturi mixers. The outlet of each Venturi mixer is connected to a turbulent shear mixer, and the outlet of the turbulent shear mixer is connected to a filter. A fluid preparation water delivery unit simultaneously or individually supplies fluid preparation water to both Venturi mixers.

[0016] Compared with the prior art, the advantages of this utility model are: (1) The mobile polymer dry powder direct mixing variable viscosity fracturing fluid equipment of this utility model is a device for rapidly and continuously mixing clean water and polymer dry powder to prepare variable viscosity fracturing fluid. The fracturing fluid prepared is free of "fish eyes" and can change the viscosity of the fracturing fluid in real time according to the needs of fracturing operations. The Venturi mixer is a device that utilizes the Venturi jet principle. High-speed water flow generates negative pressure at the throat where the pipe narrows sharply, thereby drawing the dry powder discharged by the screw feeder into the high-speed water flow for high-speed jet mixing, realizing the rapid mixing and dissolution of dry powder and clean water. The turbulent shear mixer further disperses and mixes the mixture produced by the Venturi mixer to avoid the formation of blocky "fish eyes", and a filter filters out a small amount of "fish eyes".

[0017] (2) The skid-mounted equipment is installed on a movable vehicle body, which can be transported to the fracturing site at any time for operation without hoisting. The layout is compact and it is especially suitable for fracturing operations with short fracturing cycles and frequent relocation.

[0018] Other advantages, objectives and features of this invention will be apparent in part from the description which follows, and in part from the understanding of those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment of this utility model.

[0020] Figure 2 This is a front view of the skid-mounted equipment in the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment of this utility model.

[0021] Figure 3 This is a three-dimensional schematic diagram of the skid-mounted equipment in the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment of this utility model.

[0022] Figure 4 This is a schematic diagram of a dust purifier.

[0023] Figure 5 This is a structural diagram of a turbulent shear mixer.

[0024] Numbering on the map: 1-Car body, 2-Skid-mounted equipment, 3-Inlet pipe, 4-Flow meter, 5-Inlet pump, 6-Pressure gauge A, 7-Regulating valve, 8-Venturi mixer, 9-Turbulent shear mixer, 10-Filter, 11-Outlet pipe, 12-Pressure gauge B, 13-Loading platform, 14-Electric ball valve, 15-Discharge port of screw feeder, 16-Screw feeder, 17-Slide valve, 18-Vibrator A, 19-Inlet C 20-Dust purifier, 21-Inlet A, 22-Inlet B, 23-Dry powder storage hopper, 24-Powdering pipeline for tank truck, 25-Variable frequency motor, 26-Generator, 27-Rectangular shell, 28-Air inlet, 29-Filter plate, 30-Air outlet, 31-Vibrator B, 32-Cylindrical shell, 33-Circular blind plate, 34-Guide pipe A, 35-Guide pipe B, 36-Liquid inlet, 37-Liquid outlet. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] like Figure 1-5As shown, the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment provided by this utility model consists of a vehicle body 1 and a skid-mounted device 2 installed on the vehicle body. The skid-mounted device 2 includes a dry powder feeding unit, a liquid dispensing and conveying unit, a Venturi mixer 8, a turbulent shear mixer 9, and a filter 10.

[0027] The dry powder feeding unit is located above the Venturi mixer 8. The dry powder feeding unit includes a dry powder storage hopper 23, the upper part of which is square and the lower part of which is conical. A vibrator A 18 is installed in the middle of the outer wall of the conical body, and the bottom of the conical body is a discharge port. A slide valve 17 is installed at the discharge port, and the discharge port is connected to a screw feeder 16 located below it. The screw feeder 16 is driven by a variable frequency motor 25, and the discharge port 15 of the screw feeder is connected to the feed port on the side wall of the Venturi mixer 8 through an electric ball valve 14.

[0028] The dry powder storage hopper 23 is a sealed structure. The top of the hopper is equipped with inlet A 21, inlet B 22, and a dust purifier 20. Inlet A 21 is a DN500 inlet. The polymer dry powder is stored in a ton bag, which is lifted to the top of inlet A using a lifting device. The discharge port at the bottom of the ton bag is then opened to allow the polymer dry powder to enter the storage hopper. Inlet B 22 is used to install a DN100 tanker truck pulverizing pipeline 24. The polymer dry powder is transported to the work site by tanker truck, and the high-pressure airflow from the tanker truck forces the polymer dry powder into the storage hopper 23 through the pulverizing pipeline. Inlet C19 is located on the upper part of the outer wall of the conical body for manual addition of polymer dry powder. A loading platform 13 is located below inlet C 19 for convenient material feeding. Only one of the three inlets is in use; the other two are sealed.

[0029] The rotation speed of the spiral feeder 16 can be adjusted. The powder feeding speed can be controlled by adjusting the rotation frequency of the variable frequency motor 25, thereby controlling the feeding speed of the polymer dry powder and preparing fracturing fluids of different viscosities.

[0030] The dust purifier 20 includes a rectangular shell 27. An air inlet 28 is located on each of the left and right sides of the bottom surface of the shell 27. The air inlets 28 are connected to the exhaust port at the top of the dry powder storage hopper 23. Several filter plates 29 are installed in the middle of the shell, with the filter plates 29 evenly spaced parallel to the left and right sides of the shell. All filter plates 29 are located between the two air inlets. An air outlet 30 is located at the top of the shell 27. A vibrator B 31 is installed on the outer side wall of the shell. High-pressure gas carrying dust enters the dust purifier through the air inlets 28, passes through multiple layers of filter plates to intercept the dust (dry powder), and the dust-free gas is discharged through the air outlet 30. The vibrator B 31 is mounted on the outer shell and its function is to shake off the dust from the filter plates, preventing the filter plates from becoming clogged.

[0031] The solution preparation water delivery unit includes an inlet pipe 3 and an inlet pump 5. The inlet pipe is also equipped with a flow meter 4, a pressure gauge A 6, and a regulating valve 7. The solution preparation water is delivered to the Venturi mixer via the inlet pump 5. The solution preparation water can be clean water or fracturing flowback fluid.

[0032] The Venturi mixer 8 utilizes the Venturi jet principle, where a negative pressure is generated at the throat where the high-speed water flow narrows sharply, thereby drawing the dry powder discharged by the screw feeder into the high-speed water flow for high-speed jet mixing, achieving rapid mixing and dissolution of the dry powder and water.

[0033] The turbulent shear mixer 9 includes a horizontally placed cylindrical shell 32. An inlet 36 and an outlet 37 are respectively provided at the left and right ends of the shell. A circular blind plate 33 with a diameter equal to the inner diameter of the shell is installed inside the shell. The blind plate is vertically installed parallel to the left and right end faces of the shell, dividing the internal space of the shell into left and right parts. A through hole is opened in the center of the blind plate, connecting one end of a guide pipe A34. Four through holes are opened around the perimeter of the central through hole, each connecting to a guide pipe B35. The four guide pipes B35 and guide pipe A34 are located on the same side of the blind plate. Guide pipe A34 is placed horizontally, and the four guide pipes B35 are inclined towards guide pipe A34, so that the fluid discharged from guide pipe B35 converges with the fluid discharged from guide pipe A34. After the polymer powder and the prepared water are initially mixed in a Venturi mixer, the mixture enters a turbulent shear mixer 9. The flow velocity of the mixture increases in guide pipes A and B, and the high-speed fluid creates strong turbulent impact at the convergence point, achieving further mixing. The liquid discharged from the turbulent shear mixer 9 enters a filter 10. A pressure gauge B 12 is installed at the top of the filter to monitor the pressure inside. The filtered liquid is discharged from the outlet pipe 11, which is the fracturing mother fluid.

[0034] The skid-mounted equipment 2 also includes a generator 26 to provide power to the entire skid-mounted equipment.

[0035] In another embodiment, such as Figure 3As shown, the mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment of this utility model can also be equipped with two identical fracturing fluid preparation pipelines, one for standby and one for use, or used simultaneously. The consumption rate of polymer dry powder per pipeline is 5-30 kg / min. The two identical fracturing fluid preparation pipelines share a dry powder storage hopper 23. Two parallel cones are set at the bottom of the dry powder storage hopper. The bottom of the two cones are both discharge ports. The two discharge ports are connected to a screw feeder 16. The discharge ports of the two screw feeders are connected to the inlets on the side walls of the two Venturi mixers 8. The liquid outlet of each Venturi mixer is connected to a turbulent shear mixer 9. The liquid outlet of the turbulent shear mixer is connected to a filter 10. The liquid preparation water delivery unit delivers liquid preparation water to the two Venturi mixers 8 simultaneously or separately. In one specific embodiment, the skid-mounted equipment 2 of this utility model is installed on a mobile crane (vehicle body 1), and the remaining space at the rear of the crane can store the ton-packaged dry powder required for the operation. The entire set of equipment is transported to the work site by the crane, and the ton-packaged polymer dry powder (polyacrylamide powder) stacked next to the equipment is lifted to above the feed port A 21 of the dry powder storage hopper 23. The discharge port at the bottom of the ton bag is opened to allow the dry powder to be placed into the dry powder storage hopper 23. The water inlet pipe 3 is connected to the water storage tank, and the water inlet pump 5 is started to inject the fracturing flowback fluid in the on-site water storage tank or the clean water transported to the site by tanker truck into the Venturi ejector 8 at high speed by the water inlet pump 5. The values ​​of the flow meter 4 and pressure gauge A 6 installed on the pipeline are observed, and the opening of the regulating valve 7 is adjusted. After the flow rate and pressure stabilize to the preset values, the dry powder is discharged. Start the vibrator A18 installed on the outer wall of the dry powder storage hopper 23, open the slide valve 17, and the dry powder falls evenly into the screw feeder 16 and is fed into the electric ball valve 14 through the screw. The negative pressure causes the air to carry the dry powder into the Venturi mixer 8, where it is mixed with the liquid to form a fracturing mother liquor with a certain viscosity. To avoid uneven mixing of dry powder in the Venturi jet mixer 8, resulting in blocky "fish eyes," the mixture is passed through a turbulent shear mixer 9 to subject the "fish eyes" to high-speed shearing impact, further cutting the "fish eyes" and promoting their dispersion and dissolution. The structure of the turbulent shear mixer 9 consists of five DN25 holes circumferentially distributed around the center and perimeter of a DN100 blind plate 33. DN25 guide pipes B guide the holes around the perimeter to the center. The central hole is converged with the surrounding guide pipes B by DN25 guide pipes A. The water flow velocity increases in the guide pipes, and strong turbulent impact occurs at the convergence point of the high-speed water flow, achieving further high-speed jet mixing of the mixture. Flow field simulation revealed that after the fluid undergoes turbulent shear mixing, the high-speed tributaries in the guide pipe converge and collide at the end, greatly enhancing the turbulent shear. This shearing disperses the initially formed, incompletely hydrated "fish eyes," preventing their formation. Furthermore, a basket filter 10 is installed at the rear end to filter and intercept any remaining, incompletely dispersed "fish eyes," thereby ensuring the homogenization of the fracturing mother fluid and preventing blockage of the downstream pipeline or damage to the fracturing sublayer.

[0036] In addition, to meet different operational needs, if the polymer dry powder is added at a very fast rate, a tanker truck is required to transport the dry powder to the side of the equipment of this utility model. The dry powder output pipeline of the tanker truck is connected to the powder injection port of the 24 dry powder tanker truck. The high-pressure output system of the tanker truck is started, so that the dry powder in the tanker truck is injected into the dry powder storage hopper 23 through the powder injection pipeline 24 of the tanker truck. The gas injected by the tanker truck enters the dry powder storage hopper 23 and enters the dust purifier 20 through the exhaust port to filter and intercept the dust in the gas. The clean air is discharged from the outlet.

[0037] If the dry powder addition rate required for on-site fracturing is slow, the feed port C19 can be opened and the 25kg package of dry powder can be manually poured into the dry powder storage hopper 23.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment, characterized in that, It consists of a vehicle body and skid-mounted equipment mounted on the vehicle body. The skid-mounted equipment includes a dry powder feeding unit, a liquid mixing and conveying unit, a Venturi mixer, a turbulent shear mixer, and a filter. The liquid mixing and conveying unit is connected to the inlet of the Venturi mixer, the dry powder feeding unit is connected to the feed inlet on the side wall of the Venturi mixer, the outlet of the Venturi mixer is connected to the turbulent shear mixer, and the outlet of the turbulent shear mixer is connected to the filter. The turbulent shear mixer includes a horizontally placed cylindrical shell with an inlet and an outlet at its left and right ends, respectively. A circular blind plate with a diameter equal to the inner diameter of the shell is installed inside the shell, vertically parallel to the left and right end faces of the shell, dividing the internal space of the shell into left and right parts. A through hole is opened in the center of the blind plate, connecting one end of a guide pipe A. Four through holes are opened around the perimeter of the central through hole, each connecting to a guide pipe B. The four guide pipes B and guide pipe A are located on the same side of the blind plate. Guide pipe A is placed horizontally, and the four guide pipes B are inclined towards guide pipe A, allowing the fluid discharged from guide pipe B to converge with the fluid discharged from guide pipe A. After the polymer dry powder and the prepared water are initially mixed in a Venturi mixer, they enter the turbulent shear mixer. The flow velocity of the mixture increases in guide pipes A and B, and the high-speed fluid undergoes strong turbulent impact at the convergence point, achieving further mixing of the mixture.

2. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 1, characterized in that, The dry powder feeding unit is located above the Venturi mixer. The dry powder feeding unit includes a dry powder storage hopper, the upper part of which is square; the lower part of which is conical, with the bottom of which is a discharge port. The discharge port is connected to a screw feeder located below it, and the discharge port of the screw feeder is connected to the feed inlet on the side wall of the Venturi mixer; a vibrator A is installed in the middle of the outer side wall of the cone.

3. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 2, characterized in that, The top of the dry powder storage hopper is equipped with inlet A, inlet B, and a dust purifier. Inlet A is a DN500 inlet. The polymer dry powder is stored in a ton bag and is lifted to the top of inlet A by a lifting device. The discharge port at the bottom of the ton bag is then opened to allow the polymer dry powder to enter the dry powder storage hopper. Inlet B is used to install a DN100 tanker truck powdering pipeline. The polymer dry powder is transported to the work site by tanker truck, and the high-pressure airflow from the tanker truck is used to purge the polymer dry powder into the dry powder storage hopper through the powdering pipeline. The gas carrying dust is discharged after the dust is removed by the dust purifier. Inlet C is located on the upper part of the outer wall of the cone for manual addition of polymer dry powder. Only one of the three inlets is used, and the other two are sealed.

4. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 3, characterized in that, The dust purifier includes a rectangular shell with an air inlet on each of the left and right sides of the bottom surface of the shell. Several filter plates are installed in the middle of the shell, and all filter plates are installed at intervals parallel to the left and right sides of the shell. All filter plates are located between two air inlets. An air outlet is provided at the top of the shell, and a vibrator B is provided on the outer side wall of the shell.

5. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 1, characterized in that, The solution preparation water delivery unit includes an inlet pipe and an inlet pump, which delivers the solution preparation water to the Venturi mixer.

6. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 2, characterized in that, This includes two identical fracturing fluid preparation pipelines, one for backup and one for use, or both for simultaneous use.

7. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 6, characterized in that, Two identical fracturing fluid preparation pipelines share a single dry powder storage hopper. The bottom of the dry powder storage hopper is equipped with two parallel cones, the bottom of which are discharge ports. Each discharge port is connected to a screw feeder. The discharge ports of the two screw feeders are connected to the inlets on the side walls of the two Venturi mixers. The discharge port of each Venturi mixer is connected to a turbulent shear mixer, and the discharge port of the turbulent shear mixer is connected to a filter. The fluid preparation water delivery unit delivers fluid preparation water to the two Venturi mixers simultaneously or individually.

8. The mobile polymer dry powder direct-dispensing variable viscosity fracturing fluid equipment as described in claim 1, characterized in that, The skid-mounted equipment also includes a generator to provide power to the entire skid-mounted equipment.

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