Dry powder fracturing fluid mixing device

Abstract

The application provides a dry powder fracturing fluid mixing device, and relates to the technical field of oil and gas field fracturing. The dry powder fracturing fluid mixing device comprises a barrel, the barrel is in a cylindrical structure, the first end of the barrel is provided with an opening, and the opening is used for feeding raw materials; a screening assembly, a venturi, a double-layer turbine cyclone and a high-shear homogenizer are sequentially arranged in the barrel and are in communication along the axial direction; the opening is correspondingly arranged with the screening assembly; the screening assembly screens the raw materials, and transmits the raw materials with a diameter smaller than a preset diameter to the venturi; the venturi is used for improving the flow velocity of the raw materials; the double-layer turbine cyclone is used for centrifugal sedimentation of the raw materials, so as to separate large-particle raw materials from small-particle raw materials; the small-particle raw materials are transmitted to the high-shear homogenizer; the high-shear homogenizer is used for shearing and refining the raw materials; and the end of the high-shear homogenizer away from the double-layer turbine cyclone is provided with an outlet.

Description

Technical Field

[0001] This application relates to the field of oil and gas field fracturing technology, and in particular to a dry powder fracturing fluid mixing device. Background Technology

[0002] Currently, oil and gas field fracturing refers to the key technology of injecting fracturing fluid into the oil-bearing formation using a surface high-pressure pump unit, causing the formation to generate and expand fractures, while simultaneously injecting proppant to maintain the fracture opening, thereby improving the oil and gas seepage channels and increasing single-well production. The formulation of fracturing fluid is crucial, as its performance directly affects the uniformity of the fracturing base fluid system and the efficiency of the operation.

[0003] In the prior art, in order to avoid the formation of "fish-eye" particles, the fracturing fluid mixing device is equipped with a dispersion column and a power module in front of the venturi tube. The dispersion column is connected to the power module so that the dispersion column can rotate around the axis under the drive of the power module, thereby breaking up the agglomeration of powder particles. However, when dealing with fine powder particles, there is still a problem of incomplete powder dispersion.

[0004] Therefore, how to provide a polymer dry powder fracturing fluid mixing device that can thoroughly disperse dry powder has become an urgent technical problem to be solved. Utility Model Content

[0005] This application provides a dry powder fracturing fluid mixing device, the technical solution of which is as follows:

[0006] To solve the above-mentioned technical problems, this application provides a dry powder fracturing fluid mixing device.

[0007] The present application provides a dry powder fracturing fluid mixing device through the above technical solution, comprising:

[0008] A material cylinder, wherein the material cylinder has a cylindrical structure and a first end of the material cylinder has an opening for the raw material to enter;

[0009] The material cylinder is equipped with a screening assembly, a venturi tube, a double-layer turbine hydrocyclone, and a high-shear homogenizer arranged sequentially along the axial direction. The opening is corresponding to the screening assembly. The screening assembly screens the raw material and conveys the material smaller than a preset diameter to the venturi tube. The venturi tube is used to increase the flow rate of the raw material. The double-layer turbine hydrocyclone is used to centrifuge and settle the raw material to separate large particles from small particles. The small particles are conveyed to the high-shear homogenizer, which is used to shear and refine the raw material. The end of the high-shear homogenizer away from the double-layer turbine hydrocyclone has an outlet.

[0010] In this embodiment, the screening assembly includes a receiving plate, a screen, and a guide channel. The receiving plate is an annular structure with a hollowed-out area in the center. The outer periphery of the receiving plate is fixedly connected to the inner wall of the material cylinder. The hollowed-out area of ​​the receiving plate is provided with the screen connected to the inner periphery of the receiving plate. The first end of the guide channel is connected to the inner periphery of the receiving plate, and the second end of the guide channel is used to communicate with the Venturi tube.

[0011] In this embodiment of the application, the receiving plate has a tendency to tilt towards the Venturi tube from the outer periphery to the inner periphery.

[0012] In this embodiment of the application, the diameter of the first end of the guide channel is larger than the diameter of the second end.

[0013] In this embodiment of the application, a vibrating plate is connected to the side of the receiving plate facing the guide channel, and a first driving device is connected to the vibrating plate, which is used to drive the vibrating plate to vibrate.

[0014] In this embodiment of the application, a control valve is provided at the outlet end of the double-layer turbine cyclone to control the flow rate at the outlet end of the double-layer turbine cyclone.

[0015] In this embodiment of the application, a partition plate parallel to the bottom surface of the material cylinder is also provided inside the material cylinder. The partition plate is provided at one end of the screening assembly near the Venturi tube, and the Venturi tube passes through the partition plate and communicates with the screening assembly.

[0016] A support rod is fixedly installed on the end face of the double-layer turbine cyclone separator near the venturi tube. The extension direction of the support rod is parallel to the axial direction of the material cylinder, and the other end of the support rod is fixedly connected to the partition plate.

[0017] In this embodiment of the application, the opening at the first end of the barrel includes a first opening and a second opening;

[0018] The dry powder fracturing fluid mixing device further includes a first feed pipe and a second feed pipe. The first feed pipe extends into the material cylinder through the first opening to introduce a first material into the screening component. The second feed pipe extends into the material cylinder through the second opening to introduce a second material into the screening component.

[0019] In this embodiment of the application, the first feed pipe has a feed inlet for feeding in a first raw material, and a spiral conveying shaft is provided inside the first feed pipe;

[0020] The second driving device is disposed outside the first feed pipe and connected to the screw conveyor shaft to drive the screw conveyor shaft to rotate.

[0021] In this embodiment of the application, the first feed pipe is fixedly connected to the first end of the material cylinder via a mounting plate.

[0022] This application provides a dry powder fracturing fluid mixing device, including a feed cylinder. A screening component, a venturi tube, a double-layer turbine cyclone separator, and a high-shear homogenizer are sequentially arranged along the axial direction inside the feed cylinder. When preparing the dry powder fracturing fluid, the raw material is fed into the feed cylinder through an opening at the first end. The raw material falls onto the screening component, which screens the material. Material with a diameter greater than or equal to a preset diameter is retained above the screening component, while material with a diameter smaller than the preset diameter is sieved and then transferred to the venturi tube. From there, it sequentially enters the double-layer vortex cyclone separator and the high-shear homogenizer. The three-stage venturi tube allows for a stepped flow velocity change, creating a strong shear flow field. The double-layer turbine cyclone separator uses centrifugal force to throw the solution in the raw material against the tank wall, forming a vortex. The solution is then sheared by the lower high-shear homogenizer. The synergistic effect of both components allows the polymer molecular chains to fully extend, effectively preventing the formation of fish-eye-sized particles in the powder, resulting in thorough dispersion and high dissolution efficiency.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A cross-sectional view of the dry powder fracturing fluid mixing device provided in this application;

[0026] Figure 2 A schematic diagram of the dry powder fracturing fluid mixing device provided in this application;

[0027] Figure 3 A schematic diagram of the screening component, the first feed pipe, and the second feed pipe provided in this application;

[0028] Figure 4 This is a schematic diagram of the internal structure of the barrel provided in this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Dry powder fracturing fluid mixing device; 11. Feed cylinder; 111. First opening; 112. Second opening; 113. Separator plate; 114. Support rod; 12. Screening assembly; 121. Receiving plate; 122. Screen; 123. Guide channel; 124. Vibrating plate; 125. First drive device; 13. Venturi tube; 14. Double-layer turbine cyclone separator; 15. High-shear homogenizer; 16. Control valve; 17. First feed pipe; 171. Feed inlet; 172. Screw conveyor shaft; 173. Second drive device; 18. Second feed pipe; 19. Discharge pipe; 20. Mounting plate. Detailed Implementation

[0031] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0032] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0033] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0035] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0036] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0038] Currently, oil and gas field fracturing refers to the key technology of injecting fracturing fluid into the oil layer using a surface high-pressure pump set to generate and expand fractures in the formation, while simultaneously injecting proppant to maintain fracture opening, thereby improving oil and gas seepage channels and increasing single-well production. The formulation of the fracturing fluid is crucial, as its performance directly affects the uniformity of the fracturing base fluid system and the efficiency of the operation. In existing technologies, to avoid the formation of "fish-eye" particles, the fracturing fluid mixing device is equipped with a dispersion column and a power module before the venturi tube. The dispersion column is connected to the power module so that it can rotate around its axis under the drive of the power module, thereby breaking up powder particle agglomerations. However, when dealing with finer powder particles, the problem of incomplete powder dispersion still exists. This application provides a dry powder fracturing fluid mixing device, which, by setting a screening component before the venturi tube and a double-layer turbine cyclone separator and a high-shear homogenizer after the venturi tube, can perform multi-stage screening and dispersion of powder particles, thereby dispersing the dry powder.

[0039] like Figures 1 to 4 As shown, this application provides a dry powder fracturing fluid mixing device 1, comprising:

[0040] The material cylinder 11 has a cylindrical structure and an opening at its first end for the raw material to enter.

[0041] The material cylinder 11 is provided with a screening assembly 12, a venturi tube 13, a double-layer turbine hydrocyclone 14 and a high-shear homogenizer 15 connected in sequence. The opening is connected to the screening assembly 12 so that the raw material falls into the screening assembly 12. The screening assembly 12 screens the raw material and transmits the raw material smaller than the preset diameter to the venturi tube 13. The high-shear homogenizer 15 has an outlet at the end away from the double-layer turbine hydrocyclone 14.

[0042] In this embodiment, the material cylinder 11 has a cylindrical structure and an internal space. The bottom surface of the first end of the material cylinder 11 has an opening. The raw material enters the material cylinder 11 through the opening. A screening assembly 12, a venturi tube 13, a double-layer turbine hydrocyclone 14, and a high-shear homogenizer 15 are connected sequentially along the axial direction of the material cylinder 11. After entering the material cylinder 11 through the opening, the raw material falls onto the screening assembly 12. After being screened by the screening assembly 12, it passes through the double-layer turbine hydrocyclone 14 and the high-shear homogenizer 15 in sequence, and finally exits from the outlet of the high-shear homogenizer 15.

[0043] In this embodiment, the screening component 12 can screen the raw materials so that large particles with a diameter greater than or equal to a preset diameter can be retained on the screening component 12, while small particles with a diameter less than the preset diameter can be screened by the screening component 12 and fall into the venturi tube 13.

[0044] In this embodiment, the Venturi tube 13 consists of an inlet section, a constriction section, a throat, and a diffuser section, following the standard design of a classic Venturi tube 13 (such as ISO 5167-4 or GB / T 2624 standards). The Venturi tube 13 rapidly draws in raw materials through negative pressure, increasing the flow rate of the materials and thus reducing the amount of raw material accumulation per unit volume, minimizing the "fisheye" phenomenon caused by material agglomeration. The Venturi tube 13 can be directly obtained through market procurement; its specific structure is not described in detail in this embodiment.

[0045] In this embodiment, the Venturi tube 13 provided in this application is a three-stage Venturi tube 13, which typically includes three stages of contraction sections (such as rough casting, machining, and precision polishing), with the contraction ratio of each stage gradually increasing to form a stepped throttling effect. Multiple pressure measurement points are set at the inlet section, the first contraction section, the second contraction section, and the throat. The flow calculation is significantly improved by cross-validating multiple sets of differential pressure data. Key parts (such as the throat) are made of wear-resistant and corrosion-resistant materials (such as tungsten carbide coating) to extend service life. Through multi-stage diffusion design, the pressure loss can be reduced to 3.5% to 10% of the measured differential pressure, which is only 1 / 3 of that of a conventional Venturi tube 13. The multi-stage contraction sections can effectively adjust the non-axisymmetric flow velocity distribution and reduce eddy current interference, making it suitable for high-viscosity fluids containing impurities.

[0046] In this embodiment, the double-layer turbine hydrocyclone 14 has turbines in both its inner and outer layers. The double-layer turbine hydrocyclone 14 is a separation and classification device, commonly employing the principle of centrifugal sedimentation. When the two-phase mixture to be separated enters the double-layer turbine hydrocyclone 14 tangentially from the periphery of the hydrocyclone under a certain pressure, it generates intense three-dimensional elliptical strong rotational shear turbulence. Due to the size difference between coarse and fine particles, they experience different magnitudes of centrifugal force, centripetal buoyancy, and fluid drag. Under centrifugal sedimentation, most coarse particles are discharged through the underflow port of the hydrocyclone, while most fine particles are discharged through the overflow pipe, thus achieving separation and classification, thereby discharging large particles and avoiding the "fisheye" phenomenon. The double-layer turbine hydrocyclone 14 can be directly obtained through market procurement; its specific structure is not described in detail in this embodiment.

[0047] In this embodiment, a high-shear homogenizer is a device that combines high-speed shear force to achieve material mixing, dispersion, and emulsification, and is widely used in industrial production and laboratory research. Its core functions include refining particles to the micron level (e.g., in pulp or pigment processing), preparing stable emulsions (e.g., in cosmetics or pharmaceuticals), and extracting bioactive components from broken cells (e.g., proteins). Industrial-grade equipment emphasizes high throughput and continuous production (e.g., food emulsions), while laboratory models emphasize precision control (e.g., vaccine development) and modular design. Strong shear force is generated by a high-speed rotating (10,000–28,000 rpm) working head, combined with impact and turbulence effects, to achieve material mixing, particle refinement, and emulsification. A three-stage dispersion structure (e.g., the GRS2000 module) can improve emulsification stability, and some industrial models have shear rates as high as 10,000 rpm. High-shear homogenizers can be directly obtained through commercial purchases; their specific structure is not described in detail in this embodiment.

[0048] In this embodiment, the preset diameter is the aperture of the screening component 12. Raw materials larger than the aperture of the screening component 12 will fall through the screening component 12, while raw materials smaller than or equal to the aperture of the screening component 12 will not pass through the screening component 12 and will remain on the screening component 12, thereby achieving the filtration and screening of raw materials and preventing large particles of raw materials from passing through.

[0049] In this embodiment, a discharge pipe 19 is connected to the outlet of the high shear homogenizer 15. The bottom end of the discharge pipe 19 penetrates the bottom surface of the material cylinder 11 and extends to the outside of the material cylinder 11 to discharge the processed raw material.

[0050] Therefore, the dry fracturing fluid mixing device 1 provided in this application includes a feed cylinder 11. A screening component 12, a venturi tube 13, a double-layer turbine cyclone separator 14, and a high-shear homogenizer 15 are sequentially arranged along the axial direction inside the feed cylinder 11. When preparing the dry fracturing fluid, the raw material is fed into the feed cylinder 11 through the opening at the first end of the feed cylinder 11. The raw material fed into the feed cylinder 11 falls onto the screening component 12, where it is screened. Raw materials with a diameter greater than or equal to a preset diameter are retained above the screening component 12, while raw materials with a diameter smaller than the preset diameter are sieved by the screening component 12 and then transported. The material flows through the Venturi tube 13, and then sequentially into the double-layer vortex cyclone separator and the high-shear homogenizer 15. The three-stage Venturi tube 13 can create a strong shear flow field by changing the flow rate in a stepwise manner. The double-layer turbine cyclone separator 14 can use centrifugal force to throw the solution in the raw material against the tank wall to form a vortex. The lower high-shear homogenizer 15 is equipped with six sets of toothed rotors, which generate a shear rate of 10^4 s^-1. The synergistic effect of the two allows the polymer molecular chains to fully extend within 30 seconds, thereby effectively preventing the formation of fish-eye-sized particles in the powder, resulting in thorough dispersion of the raw material and high dissolution efficiency.

[0051] like Figures 1 to 4 As shown in this embodiment, the screening component 12 includes a receiving plate 121, a screen 122, and a guide channel 123. The receiving plate 121 is an annular structure with a hollow area in the center. The outer periphery of the receiving plate 121 is fixedly connected to the inner wall of the material cylinder 11. The hollow area of ​​the receiving plate 121 is provided with the screen 122 connected to the inner periphery of the receiving plate 121. The first end of the guide channel 123 is connected to the inner periphery of the receiving plate 121, and the second end of the guide channel 123 is used to communicate with the venturi tube 13.

[0052] In this embodiment, the receiving plate 121 has an annular structure with an inner circumference and an outer circumference, and a hollow area in the middle. The receiving plate 121 can be arranged approximately parallel to the bottom surface of the material cylinder 11. The outer circumference of the receiving plate 121 is connected to the inner wall of the material cylinder 11, and the inner circumference of the receiving plate 121 is connected to the first end of the guide channel 123. Thus, the receiving plate 121 and the guide channel 123 form a structure that can accommodate and allow raw materials to flow through. The guide channel 123 can also support the receiving plate 121. A screen 122 is provided in the hollow area in the middle of the receiving plate 121. The outer circumference of the screen 122 is connected to the inner circumference of the receiving plate 121. The diameter of the screen 122 is determined by setting the diameter of the screen 122 to control the diameter of the raw material passing through the screen 122.

[0053] In this embodiment, when the raw material enters the feed cylinder 11 through the opening, it will fall onto the screen 122 or the receiving plate 121. Then the raw material will be screened on the screen 122 to remove large particles. Small particles will enter the venturi tube 13 through the guide channel 123 for further processing, thereby avoiding the appearance of fish-eye-sized particles from the source.

[0054] like Figures 1 to 4 As shown in the embodiment of this application, the receiving plate 121 has a tendency to tilt towards the venturi tube 13 from the outer periphery to the inner periphery.

[0055] In this embodiment, the receiving plate 121 has a conical structure and the surface of the receiving plate 121 is inclined towards the inner surface. So when the raw material falls onto the receiving plate 121, it can fall into the screen 122 in the center of the receiving plate 121 under the action of the inclined receiving plate 121 and gravity. Through the filtration of the screen 122, small particles of raw material with a diameter smaller than the preset diameter are transported to the venturi tube 13 through the guide channel 123 below the screen 122 to achieve further refinement of the raw material.

[0056] In this embodiment of the application, the diameter of the first end of the guide channel 123 is greater than the diameter of the second end.

[0057] In this embodiment, the guide channel 123 includes a drainage portion and a connecting portion. The first end of the drainage portion is connected to the inner diameter of the receiving plate 121, and the second end is connected to the first end of the connecting portion. The diameter of the drainage portion gradually decreases from the first end to the second end along the axial direction, forming a funnel-shaped structure. The connecting portion is a cylindrical structure, and the second end of the connecting portion is connected to the Venturi tube 13. The drainage portion and the connecting portion can be integrally formed, thereby the guide channel 123 has higher strength and lower production cost.

[0058] In this embodiment, the first end of the guide channel 123 is connected to the inner circumference of the receiving plate 121, and a screen 122 is provided above the first end. The second end of the guide channel 123 is connected to the venturi tube 13. When the diameter of the second end of the guide channel 123 is larger than the diameter of the second end, more raw materials can be received and screened on the screen 122 to avoid raw material accumulation. The raw materials after being screened through the screen 122 will be less than before. Then, the transmission through the second end of the guide channel 123 with a smaller diameter is more conducive to the transmission of raw materials, so as to play the role of diversion and guidance.

[0059] In this embodiment of the application, a vibrating plate 124 is connected to the side of the receiving plate 121 facing the guide channel 123, and a first driving device 125 is connected to the vibrating plate 124. The first driving device 125 is used to drive the vibrating plate 124 to vibrate.

[0060] In this embodiment, the first driving device 125 can be a vibration motor. The opening and closing of the vibration motor can be controlled manually or by a pre-set program. It can be obtained directly through market procurement. The specific structure is not described in detail in this embodiment of the invention.

[0061] In this embodiment, a vibrating plate 124 is fixedly installed on the side of the receiving plate facing away from the opening. The vibrating plate 124 is located near the outer periphery of the receiving plate and is approximately perpendicular to the surface of the receiving plate. A vibration motor is installed on the side of the vibrating plate 124 facing the receiving plate. When the vibration motor is turned on, it will generate vibration, thereby causing the vibrating plate 124, the receiving plate 121 fixedly connected to the vibrating plate 124, the screen 122 connected to the receiving plate 121, and the guide channel 123 to vibrate. This allows the raw material on the receiving plate 121 to vibrate to the screen 122 for filtration. The raw material at the screen 122 can vibrate, causing the screen 122 to vibrate the raw material, preventing the raw material from accumulating and screening the dry powder, thereby intercepting large particles of raw material. The vibration of the guide channel 123 can also accelerate the flow speed of the raw material, speeding up the flow of the raw material into the venturi tube 13.

[0062] like Figures 1 to 4 As shown in this embodiment, a control valve 16 is provided at the outlet end of the double-layer turbine cyclone separator 14 to control the flow rate at the outlet end of the double-layer turbine cyclone separator 14.

[0063] In this embodiment, the control valve 16 is a valve that changes the fluid flow rate by means of power operation.

[0064] In this embodiment, the control valve 16 can control the flow rate of the raw material discharged from the double-layer turbine cyclone separator 14, thereby ensuring the amount of raw material entering the high-shear homogenizer 15 and avoiding the problem of raw material accumulation caused by excessive raw material entering the high-shear homogenizer 15.

[0065] like Figures 1 to 4 As shown in the embodiment of this application, a partition plate 113 parallel to the bottom surface of the material cylinder 11 is also provided inside the material cylinder 11. The partition plate 113 is provided at one end of the screening component 12 near the Venturi tube 13, and the Venturi tube 13 passes through the partition plate 113 and communicates with the screening component 12.

[0066] A support rod 114 is fixedly installed on the end face of the double-layer turbine cyclone separator 14 near the venturi tube 13. The extension direction of the support rod 114 is parallel to the axial direction of the material cylinder 11, and the other end of the support rod 114 is fixedly connected to the partition plate 113.

[0067] In this embodiment, a partition plate 113 is provided inside the material cylinder 11 to divide the inside of the material cylinder 11 into an upper region and a lower region. A screening component 12 is provided in the upper region, and a venturi tube 13, a double-layer turbine cyclone separator 14 and a high-shear homogenizer 15 are provided in the lower region. The partition plate 113 is provided with a through hole, and part of the venturi tube 13 extends into the upper region through the through hole and communicates with the guide channel 123 of the screening component 12.

[0068] In this embodiment, a support rod 114 approximately perpendicular to the surface of the double-layer turbine cyclone separator 14 is provided on the surface facing the partition plate 113. The first end of the support rod 114 is connected to the surface of the double-layer turbine cyclone separator 14, and the second end is connected to the partition plate 113, thereby fixing the double-layer turbine cyclone separator 14 through the support rod 114, and further fixing the high-shear homogenizer 15 and the venturi tube 13 connected to the double-layer turbine cyclone separator 14; a fixing ring is also sleeved on the first end of the support rod 114, thereby further fixing the double-layer turbine cyclone separator 14.

[0069] like Figures 1 to 4 As shown in the embodiment of this application, the opening at the first end of the material cylinder 11 includes a first opening 111 and a second opening 112;

[0070] The dry powder fracturing fluid mixing device 1 further includes a first feed pipe 17 and a second feed pipe 18. The first feed pipe 17 extends into the material cylinder 11 through the first opening 111 to introduce a first material into the screening component 12. The second feed pipe 18 extends into the material cylinder 11 through the second opening 112 to introduce a second material into the screening component 12.

[0071] In this embodiment, the opening on the bottom surface of the first end of the material cylinder 11 includes a first opening 111 and a second opening 112. The first opening 111 and the second opening 112 are spaced apart. The first opening 111 and the second opening 112 are both corresponding to a portion of the screening component 12. The first opening 111 is adapted to the first feed pipe 17, so that the first feed pipe 17 extends into the material cylinder 11 through the first opening 111 to introduce a first material into the screening component 12. The first material can be a dry powder raw material. The second opening 112 is adapted to the second feed pipe 18, so that the second feed pipe 18 extends into the material cylinder 11 through the second opening 112 to introduce a second material into the screening component 12. The second material can be nitrogen and / or base liquid raw material.

[0072] In this embodiment, the first feed pipe 17 can be connected to the receiving plate, or the first feed pipe 17 can be located above the receiving plate and at a certain distance from the receiving plate.

[0073] In this embodiment, when feeding material into the cylinder 11, the dry powder raw material can be transferred to the screening component 12 through the first feed pipe 17, and nitrogen and base liquid raw material can be added through the second feed pipe 18. When the nitrogen enters the cylinder 11, it can blow air onto the dry powder raw material, so that the dry powder raw material can be blown in atomized form evenly.

[0074] like Figures 1 to 4 As shown in the embodiment of this application, the first feed pipe 17 has a feed inlet 171 for feeding in a first raw material, and a spiral conveying shaft 172 is provided inside the first feed pipe 17.

[0075] The second driving device 173 is disposed outside the first feed pipe 17 and connected to the screw conveyor shaft 172 to drive the screw conveyor shaft 172 to rotate.

[0076] In this embodiment, the second driving device 173 is a drive motor. The opening and closing of the drive motor can be controlled manually or by a pre-set program. It can be obtained directly from the market. The specific structure is not described in detail in this embodiment. The drive motor is connected to the screw conveyor shaft 172. When the drive motor is in the open state, it can drive the screw conveyor shaft 172 to rotate.

[0077] In this embodiment, the first feed pipe 17 includes a first portion extending parallel to the bottom surface of the first end of the material cylinder 11 and a second portion perpendicular to the bottom surface. The second portion extends into the material cylinder 11 through a first opening 111. A feed inlet 171 is provided on the side wall of the first portion away from the material cylinder 11. A first material enters the first feed pipe 17 through the feed inlet 171. A driving device is provided on the outside of one end of the first portion. A screw conveyor shaft 172 is provided inside the first feed pipe 17. The screw conveyor shaft 172 and the second driving device 173 rotate under the drive of the second driving device 173 to push the first material entering from the feed inlet 171 from the first portion to the second portion, so as to transfer it to the screening assembly 12 inside the material cylinder 11.

[0078] like Figures 1 to 4 As shown in the embodiment of this application, the first feed pipe 17 is fixedly connected to the first end of the material cylinder 11 via the mounting plate 20.

[0079] In this embodiment, the first feed pipe 17 is fixed by the mounting plate 20 to fix the first feed pipe 17 on the material cylinder 11 and prevent the first feed pipe 17 from moving.

[0080] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0081] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A dry powder fracturing fluid mixing device, characterized in that, include: A material cylinder, wherein the material cylinder has a cylindrical structure and a first end of the material cylinder has an opening for the raw material to enter; The material cylinder is equipped with a screening assembly, a venturi tube, a double-layer turbine hydrocyclone, and a high-shear homogenizer arranged sequentially along the axial direction. The opening is corresponding to the screening assembly. The screening assembly screens the raw material and conveys the material smaller than a preset diameter to the venturi tube. The venturi tube is used to increase the flow rate of the raw material. The double-layer turbine hydrocyclone is used to centrifuge and settle the raw material to separate large particles from small particles. The small particles are conveyed to the high-shear homogenizer, which is used to shear and refine the raw material. The end of the high-shear homogenizer away from the double-layer turbine hydrocyclone has an outlet.

2. The dry powder fracturing fluid mixing device according to claim 1, characterized in that, The screening assembly includes a receiving plate, a screen, and a guide channel. The receiving plate is an annular structure with a hollow area in the center. The outer periphery of the receiving plate is fixedly connected to the inner wall of the material cylinder. The hollow area of ​​the receiving plate is provided with the screen connected to the inner periphery of the receiving plate. The first end of the guide channel is connected to the inner periphery of the receiving plate, and the second end of the guide channel is used to communicate with the Venturi tube.

3. The dry powder fracturing fluid mixing device according to claim 2, characterized in that, The receiving plate tends to tilt towards the Venturi tube from the outer periphery to the inner periphery.

4. The dry powder fracturing fluid mixing device according to claim 2, characterized in that, The diameter of the first end of the guide channel is larger than the diameter of the second end.

5. The dry powder fracturing fluid mixing device according to claim 2, characterized in that, A vibrating plate is connected to the side of the receiving plate facing the guide channel, and a first driving device is connected to the vibrating plate. The first driving device is used to drive the vibrating plate to vibrate.

6. The dry powder fracturing fluid mixing device according to claim 2, characterized in that, The outlet end of the double-layer turbine cyclone is equipped with a control valve to control the flow rate at the outlet end of the double-layer turbine cyclone.

7. The dry powder fracturing fluid mixing device according to claim 6, characterized in that, The material cylinder is also provided with a partition plate parallel to the bottom surface of the material cylinder. The partition plate is located at one end of the screening assembly near the Venturi tube, and the Venturi tube passes through the partition plate and communicates with the screening assembly. A support rod is fixedly installed on the end face of the double-layer turbine cyclone separator near the venturi tube. The extension direction of the support rod is parallel to the axial direction of the material cylinder, and the other end of the support rod is fixedly connected to the partition plate.

8. The dry powder fracturing fluid mixing device according to claim 1, characterized in that, The opening at the first end of the barrel includes a first opening and a second opening; The dry powder fracturing fluid mixing device further includes a first feed pipe and a second feed pipe. The first feed pipe extends into the material cylinder through the first opening to introduce a first material into the screening component. The second feed pipe extends into the material cylinder through the second opening to introduce a second material into the screening component.

9. The dry powder fracturing fluid mixing device according to claim 8, characterized in that, The first feed pipe has a feed inlet for feeding in a first type of raw material, and a screw conveyor shaft is provided inside the first feed pipe; The second driving device is disposed outside the first feed pipe and connected to the screw conveyor shaft to drive the screw conveyor shaft to rotate.

10. The dry powder fracturing fluid mixing device according to claim 8, characterized in that, The first feed pipe is fixedly connected to the first end of the material cylinder via a mounting plate.

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