Fracturing fluid mixing device

Abstract

The utility model provides a fracturing fluid mixing device, and belongs to the technical field of fracturing fluid preparation. Comprising a mixing cylinder, a clear water pipe is arranged at the top of the mixing cylinder, and a dry powder pipe is arranged at one end of the mixing cylinder; and a mixing assembly. By arranging the mixing assembly as a core unit in efficient online continuous mixing, efficient mixing and dissolving of polymer dry powder and water are achieved, the technical problems that dispersion is uneven, fisheye is prone to being generated, viscosity is uncontrollable and the like in the solid-liquid mixing and dissolving process in the current technology are effectively solved, the polymer is perfectly hydrated in water, and the water quality is improved. The technical requirements of site construction are met, a hydraulic pore plate in the mixing assembly is exquisite in design, and turbulent flow can be formed when clear water passes through inclined circulating holes in the inner wall of the hydraulic pore plate, so that the washing and dispersing effects on the dry powder are enhanced. The design promotes rapid and uniform dissolution of dry powder in water, and improves the preparation efficiency of the fracturing fluid.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing fluid preparation, and particularly relates to a fracturing fluid mixing device. Background Art

[0002] Reservoir stimulation technologies mainly based on hydraulic fracturing have become the most widely used modern technologies for increasing oil production rate and recoverable reserves. Fracturing fluid is the "blood" of reservoir stimulation projects. Using ten thousand cubic meters of fluid and one thousand cubic meters of sand per well has become the main feature and important consensus of horizontal well volume stimulation.

[0003] The core component of fracturing fluid is a drag reducer, including three types: synthetic emulsion, suspension, and powder particles. Conventional polymer dry powder has slow dispersion and swelling, is prone to producing fisheyes, the liquid mixing process is cumbersome, and the liquid is prone to uneven stratification. Existing dry powder liquid mixing technologies cannot achieve online mixing and injection immediately, and require pre-mixing or the use of buffer tanks, resulting in low construction efficiency. Therefore, the utility model provides a fracturing fluid mixing device to meet the needs. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides the following technical solutions:

[0005] A fracturing fluid mixing device includes a mixing cylinder, a fresh water pipe is arranged at the top of the mixing cylinder, and a dry powder pipe is arranged at one end of the mixing cylinder; a mixing assembly for mixing fresh water and dry powder in the preparation of fracturing fluid, and the mixing assembly is connected to the mixing cylinder.

[0006] Optionally, the mixing cylinder includes a partition part, a conical mixing part is arranged on one side of the partition part, a smooth part is arranged at one end of the conical mixing part, and a trumpet-shaped outflow part is arranged at one end of the smooth part.

[0007] Optionally, the mixing assembly includes an annular hydraulic orifice plate fixedly connected between the conical mixing part and the partition part, a dry powder docking pipe is fixedly connected to the other end of the partition part, and the output end of the dry powder docking pipe penetrates and extends to the outside of the hydraulic orifice plate.

[0008] Optionally, an annular fresh water cavity is formed between the dry powder docking pipe and the partition part, and the fresh water cavity is fixedly communicated with the fresh water pipe.

[0009] Optionally, inclined through holes are formed on the inner wall of the hydraulic orifice plate, the through holes are annularly and equidistantly distributed inside the hydraulic orifice plate with the center of the hydraulic orifice plate as the center of the circle, and the extension paths of the through holes intersect with the extension path of the dry powder docking pipe.

[0010] Optionally, the dry powder pipe includes a connecting pipe bolted to the dry powder docking pipe, and a feeding hopper is arranged at the other end of the connecting pipe.

[0011] Optionally, an anti - adhesion coating is sprayed on the inner wall of the mixing cylinder, and the anti - adhesion coating is made of fluorocarbon additives.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects:

[0013] In the above - mentioned solution, by setting the mixing component, as the core unit in efficient on - line continuous mixing, the high - efficiency mixing of polymer dry powder and water is realized, effectively solving the technical problems such as uneven dispersion, easy generation of "fish eyes", and uncontrollable viscosity in the current solid - liquid mixing process, enabling the polymer to achieve perfect hydration in water to meet the technical requirements of on - site construction.

[0014] In the above - mentioned solution, the hydraulic orifice plate in the mixing component is exquisitely designed, and the inclined flow holes on its inner wall enable the clear water to form a turbulent flow when passing through, thereby enhancing the scouring and dispersion effects on the dry powder. This design promotes the rapid and uniform dissolution of the dry powder in water and improves the preparation efficiency of the fracturing fluid.

[0015] In the above - mentioned solution, the inclined setting and annular equidistant distribution of the flow holes not only ensure the uniform distribution of the clear water, but also enable the dry powder to be dispersed in all directions and at multiple angles when impacted by the water flow, further enhancing the mixing effect. At the same time, the intersection design of the extended path of the flow hole and the dry - powder docking pipe ensures that the dry powder can be directly and effectively scoured by the water flow, avoiding the accumulation and blockage of the dry powder in the pipeline.

[0016] In the above - mentioned solution, the fluorocarbon - additive anti - adhesion coating sprayed on the inner wall of the mixing cylinder has excellent anti - stickiness and corrosion resistance, which can effectively prevent the fracturing fluid from adhering to the cylinder wall during the mixing process, ensuring the smooth progress of the mixing process and the uniformity of the mixed liquid.

[0017] In the above - mentioned solution, the device realizes the function of on - line mixing and injection immediately, without the need for pre - mixing or using a buffer tank, greatly improving the construction efficiency. At the same time, due to the improvement of the mixing effect, the construction problems caused by uneven mixing, such as pipe blockage and viscosity fluctuation, are also reduced. The structure of the device is reasonably designed, and each component is easy to disassemble and clean, facilitating maintenance and repair. This not only extends the service life of the equipment but also ensures the preparation quality of the fracturing fluid. Description of the Drawings

[0018] Figure 1 It is a three - dimensional structure schematic diagram of the fracturing - fluid mixing device;

[0019] Figure 2 It is a combined three - dimensional structure schematic diagram of the mixing device;

[0020] Figure 3 It is a fluid path diagram of the mixing device.

[0021] [Reference Signs]

[0022] 1, mixing cylinder; 101, partitioning portion; 102, fresh water chamber; 103, dry powder docking pipe; 104, conical mixing portion; 105, smooth portion; 106, outflow portion; 107, hydraulic orifice plate; 108, flow-through hole; 2, fresh water pipe; 3, dry powder pipe; 301, connecting pipe; 302, feeding hopper. Detailed Embodiment

[0023] The following describes in detail a fracturing fluid mixing device provided by the present utility model in conjunction with the accompanying drawings and specific embodiments; at the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are preferred embodiments, and for some well-known technologies, those skilled in the art can also adopt other alternative methods.

[0024] As Figures 1 to 3As shown in the figure, an embodiment of the present utility model provides a fracturing fluid mixing device, which includes a mixing cylinder 1. A clear water pipe 2 is provided at the top of the mixing cylinder 1, and a dry powder pipe 3 is provided at one end of the mixing cylinder 1; a mixing assembly, which is used for mixing clear water and dry powder in the preparation of fracturing fluid. The mixing assembly is connected to the mixing cylinder 1. The mixing cylinder 1 includes a partition part 101. A conical mixing part 104 is provided on one side of the partition part 101. A smooth part 105 is provided at one end of the conical mixing part 104. A trumpet-shaped outflow part 106 is provided at one end of the smooth part 105. The mixing assembly includes an annular hydraulic orifice plate 107 fixedly connected between the conical mixing part 104 and the partition part 101. The other end of the partition part 101 is fixedly connected with a dry powder docking pipe 103. The output end of the dry powder docking pipe 103 penetrates and extends to the outside of the hydraulic orifice plate 107. An annular clear water cavity 102 is formed between the dry powder docking pipe 103 and the partition part 101. The clear water cavity 102 is fixedly communicated with the clear water pipe 2. Inclined flow holes 108 are formed on the inner wall of the hydraulic orifice plate 107. The flow holes 108 are annularly and equidistantly distributed inside the hydraulic orifice plate 107 with the center of the hydraulic orifice plate 107 as the center of the circle. The extended path of the flow holes 108 intersects with the extended path of the dry powder docking pipe 103. The dry powder pipe 3 includes a connecting pipe 301 bolted to the dry powder docking pipe 103. A feeding hopper 302 is provided at the other end of the connecting pipe 301. First, the dry powder is added through the feeding hopper 302, and then the dry powder enters the dry powder docking pipe 103 along the connecting pipe 301. At the same time, the clear water enters the clear water cavity 102 of the mixing cylinder 1 through the clear water pipe 2. When the dry powder is ejected from the output end of the dry powder docking pipe 103, it directly enters the mixing area formed by the hydraulic orifice plate 107. At this time, the clear water in the clear water cavity 102 is ejected through the inclined flow holes 108 on the hydraulic orifice plate 107 to form one or more turbulent flows. These turbulent flows collide and mix violently with the dry powder in the conical mixing part 104, promoting the rapid dissolution of the dry powder and its uniform dispersion in the clear water. The preliminarily mixed fracturing fluid continues to flow to the smooth part 105 to further eliminate possible undissolved particles or agglomerates.Finally, the uniformly mixed fracturing fluid is smoothly output through the trumpet-shaped outflow part 106 for subsequent construction. Through the design of the hydraulic orifice plate 107, clear water sprays out in a turbulent flow form, effectively increasing the contact area and mixing efficiency between the dry powder and clear water, ensuring that the dry powder is fully dissolved and uniformly dispersed in the clear water in a short time. The turbulent mixing process reduces the aggregation and deposition of dry powder particles, effectively avoiding the occurrence of the "fish-eye" phenomenon and ensuring the uniformity of the fracturing fluid, preventing liquid stratification. This device realizes the online continuous mixing and instant output of the fracturing fluid, eliminating the need for pre-mixing or using a buffer tank, greatly improving the construction efficiency and flexibility. The device has a reasonable structural design, with all components firmly connected and easy to disassemble, facilitating daily maintenance and cleaning, and extending the service life of the equipment. This mixing device is not only applicable to the preparation of fracturing fluid but can also be widely used in other fields requiring solid-liquid mixing, with strong versatility and applicability. By optimizing the mixing process, it reduces material waste and energy consumption losses caused by uneven mixing, meeting the requirements of environmental protection and energy conservation.

[0025] In this embodiment, as Figures 1 to 2 shown, an anti-adhesion coating is sprayed on the inner wall of the mixing cylinder 1. The anti-adhesion coating is made of fluorocarbon additive. As a special anti-adhesion material, fluorocarbon additive has an extremely low surface energy. This means that its interaction force with other substances is weak and it is difficult to be adhered to by other substances. Fluorocarbon additive can adjust the surface tension of the inner wall of the mixing cylinder 1 to make it smoother and less likely to adsorb liquid or solid particles. During the fracturing fluid mixing process, even if the tiny particles or droplets in the fracturing fluid come into contact with the inner wall of the mixing cylinder 1, they are difficult to adhere due to the low surface energy property, thus keeping the inner wall of the mixing cylinder 1 clean. Fluorocarbon additive has good chemical stability and can resist the erosion of various chemical substances in the fracturing fluid, ensuring the long-term effectiveness and durability of the inner wall of the mixing cylinder 1. The application of the fluorocarbon additive anti-adhesion coating significantly reduces the adhesion and deposition of the fracturing fluid on the inner wall of the mixing cylinder 1, avoiding problems such as a decrease in mixing efficiency and difficult cleaning caused by the accumulation of adherents. Since the inner wall of the mixing cylinder 1 remains clean, the fracturing fluid can flow and mix more smoothly during the mixing process, thereby improving the mixing efficiency and ensuring the quality of the fracturing fluid. The fluorocarbon additive anti-adhesion coating has good wear resistance and corrosion resistance, protecting the inner wall of the mixing cylinder 1 from the damage of the fracturing fluid and mechanical wear, thus extending the service life of the equipment. Since the generation of adhesion and deposits is reduced, the cleaning and maintenance work of the mixing cylinder 1 becomes simpler and more efficient, reducing the maintenance cost and time cost. The application of the fluorocarbon additive anti-adhesion coating also helps to reduce the environmental pollution caused by wastewater and waste generated during the cleaning process, improving the environmental performance of the entire production process.

[0026] The working principle provided by the present utility model is as follows. First, dry powder is added through the feeding hopper 302. Subsequently, the dry powder enters the dry powder docking pipe 103 along the connecting pipe 301. At the same time, clear water enters the clear water chamber 102 of the mixing cylinder 1 through the clear water pipe 2. When the dry powder is ejected from the output end of the dry powder docking pipe 103, it directly enters the mixing area formed by the hydraulic orifice plate 107. At this time, the clear water in the clear water chamber 102 is ejected through the inclined flow holes 108 on the hydraulic orifice plate 107, forming one or more turbulent flows. These turbulent flows collide and mix violently with the dry powder in the conical mixing part 104, promoting the rapid dissolution of the dry powder and its uniform dispersion in the clear water. The fracturing fluid after preliminary mixing continues to flow towards the smooth part 105 to further eliminate possible undissolved particles or agglomerates. Finally, the uniformly mixed fracturing fluid is smoothly output through the trumpet-shaped outflow part 106 for subsequent construction use.

[0027] The present utility model covers any substitutions, modifications, equivalent methods, and solutions made within the essence and scope of the present utility model. To enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the following preferred embodiments of the present utility model. However, those skilled in the art can fully understand the present utility model without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present utility model.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A fracturing fluid mixing device, comprising a mixing cylinder (1), characterized in that: A clean water pipe (2) is provided at the top of the mixing cylinder (1), and a dry powder pipe (3) is provided at one end of the mixing cylinder (1); A mixing component, the mixing component is used for mixing clean water and dry powder in the preparation of fracturing fluid, and the mixing component is connected to a mixing barrel (1).

2. The fracturing fluid mixing device according to claim 1, characterized in that: The mixing cylinder (1) comprises a partition (101), a conical mixing portion (104) is provided on one side of the partition (101), a smooth portion (105) is provided at one end of the conical mixing portion (104), and a trumpet-shaped outflow portion (106) is provided at one end of the smooth portion (105).

3. The fracturing fluid mixing device according to claim 2, characterized in that: The mixing assembly comprises an annular hydraulic orifice plate (107) fixedly connected between the conical mixing portion (104) and the partition portion (101); the other end of the partition portion (101) is fixedly connected to a dry powder butt joint pipe (103); the output end of the dry powder butt joint pipe (103) penetrates and extends to the outside of the hydraulic orifice plate (107).

4. The fracturing fluid mixing device according to claim 3, characterized in that: An annular clean water chamber (102) is formed between the dry powder butt joint tube (103) and the partition (101), and the clean water chamber (102) is fixedly connected to the clean water pipe (2).

5. The fracturing fluid mixing device according to claim 4, characterized in that: The inner wall of the hydraulic orifice plate (107) is provided with obliquely arranged flow holes (108), the flow holes (108) being equidistantly distributed in a circular pattern inside the hydraulic orifice plate (107) with the center of the hydraulic orifice plate (107) as the center of the circle, and the extended path of the flow holes (108) intersects with the extended path of the dry powder butt joint tube (103).

6. The fracturing fluid mixing device according to claim 5, characterized in that: The dry powder tube (3) comprises a connecting tube (301) bolted to the dry powder butt tube (103), and an upper hopper (302) is provided at the other end of the connecting tube (301).

7. The fracturing fluid mixing device according to claim 1, characterized in that: The inner wall of the mixing cylinder (1) is sprayed with an anti-adhesion coating, and the material of the anti-adhesion coating is a fluorocarbon additive.

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