Liquid preparation device for fracturing

Abstract

The utility model relates to a liquid preparation device for fracturing. The liquid preparation device comprises a feeding cylinder, a stirring pipe and a stirring cabin, a crushing part driven by a motor is arranged in the feeding cylinder and is used for grinding and crushing solid raw materials; the stirring pipe is connected with the feeding cylinder through a smooth pipe, the stirring pipe can be rotatably inserted into the stirring cabin through a driving part, the stirring pipe is hollow, and a plurality of small round holes are formed in a pipe body; a plurality of fan blades are arranged on the stirring pipe, and solid dry powder water is stirred and mixed uniformly in the stirring cabin; during working, solid raw materials in the feeding cylinder are crushed into dry powder by the crushing part, then dry powder is directly conveyed into the stirring pipe, the driving part is started to enable the stirring pipe to rotate in the stirring cabin filled with water, and the dry powder is brought into the water through the small round holes in the pipe body and is uniformly stirred and mixed with the water to form fracturing fluid. The device has the beneficial effects that the working efficiency is high, waste is avoided, and the device is convenient to disassemble and clean.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing fluid preparation equipment, in particular to a liquid preparation device for fracturing. Background Art

[0002] Fracturing fluid is a mixed liquid used for fracturing construction of oil reservoirs. It is made from a variety of solid and liquid additives according to a certain ratio. These additive components must be mixed evenly according to a certain ratio to form qualified fracturing fluid. In this mixing process, there is a step of solid-liquid mixing. Currently, usually, a crushing and grinding device is first used to crush the solid raw materials to a suitable size, and then a stirring device is used for solid-liquid stirring and mixing.

[0003] However, there are some high-molecular compounds in the solid raw materials for preparing fracturing fluid. Because their density is less than that of water, when they are poured into a stirring tank filled with liquid, they often float on the water surface or absorb water and form lumps. When the stirring rod is inserted into them for stirring, it is very difficult to stir the lumps on the surface, and their dissolution rate is relatively slow, resulting in a time-consuming and low-efficiency whole stirring and mixing process. Moreover, when too much solid powder is poured, the formed lumps may adhere to the side wall and bottom of the stirring tank, affecting the mixing quality and being not convenient for subsequent cleaning.

[0004] Therefore, based on the deficiencies of the existing device feedback from customers, the inventor made further improvements according to the proposed defects and deficiencies to overcome the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a liquid preparation device for fracturing with high working efficiency, avoiding waste, and being convenient for installation, disassembly and cleaning.

[0006] The purpose of the utility model is realized through the following technical solutions: A liquid preparation device for fracturing, including a base and a stirring chamber; the base is arranged on the ground, and the stirring chamber is arranged on the base; its characteristics are: it further includes a feeding tube and a stirring tube;

[0007] A crushing component driven by a motor A is arranged in the feeding tube to grind and crush the solid raw materials;

[0008] The stirring tube is connected to the feeding tube through a smooth tube, and the stirring tube can be rotatably inserted into the stirring chamber through a driving component. The inside of the stirring tube is hollow and there are a plurality of small round holes on the tube body;

[0009] A plurality of fan blades are arranged on the stirring tube to stir and mix the solid dry powder and water in the stirring chamber;

[0010] When working, the crushing components in the feed barrel crush the solid raw materials into dry powder, and then transport the dry powder directly to the mixing tube. The driving components are started to make the mixing tube rotate in the mixing chamber filled with water. The dry powder is brought into the water through multiple small circular holes on the tube body, and mixed with the water to form fracturing fluid.

[0011] As a preferred technical solution of the present application, the driving component includes gear A and gear B; gear A is sleeved on the stirring tube, and gear A is meshed with gear B arranged on the left side of the base, and gear B is driven by motor B.

[0012] As a preferred technical solution of the present application, the fan blades are arranged on the tube body of the stirring tube, and the fan blades are rectangular frames, the rectangular frame edges of which are in contact with the side walls of the stirring chamber to clean the side walls, and multiple short rods are arranged in the fan blades for stirring.

[0013] As a preferred technical solution of the present application, a cleaning brush is provided at the tail of the stirring tube, and the cleaning brush is in contact with the bottom of the stirring chamber. When the stirring tube rotates, the cleaning brush scrapes and cleans the bottom of the stirring chamber.

[0014] As the preferred technical solution of the present application, the feed barrel and the stirring tube are connected by a conical groove, the upper groove of the conical groove is connected to the bottom of the feed barrel, and the lower groove is connected to the smooth tube. The upper groove is much larger than the lower groove, and the ground dry powder is directly slid into the stirring tube through the inclined surface of the conical groove.

[0015] As the preferred technical solution of the present application, it also includes a lifting part; the lifting part includes a lifting screw and a connecting block; the lifting screw is cooperated with a connecting block, and the connecting block is connected to the conical groove. The lifting screw is driven by a lifting motor to rotate, driving the connecting block to move up and down, thereby causing the stirring tube connected to the conical groove to move up and down, so that a structure that is convenient for disassembly and cleaning is formed between the stirring tube and the stirring chamber.

[0016] The utility model has the following advantages:

[0017] (1) Prevent solid dry powder from absorbing water and agglomerating, resulting in low mixing efficiency;

[0018] In the existing fracturing fluid preparation device, during the solid-liquid mixing process, the density of the solid raw materials ground into powder is usually smaller than that of water. Therefore, when directly poured into the mixing tank, the solid raw materials will float on the water surface and absorb water to form lumps, which slows down the dissolution time, prolongs the mixing process time, and has low work efficiency. The device designed in this scheme has a hole in the stirring rod and designs the stirring rod as a hollow tube. The powder directly enters the tube and then is inserted into the liquid. When the stirring tube rotates, the dry powder is brought out and mixed with the water, which effectively prevents the dry powder from absorbing water and agglomerating on the surface.

[0019] (2) Effectively avoid the waste of raw materials;

[0020] When too much solid dry powder is poured into the mixing tank at one time, it will cause too many lumps to form, which are likely to adhere to the side walls and bottom corners of the mixing tank. They are not easy to clean and may lead to unqualified fracturing fluid; in this solution, a frame-shaped fan blade is provided on the mixing tank to scrape and clean the side walls of the mixing chamber when rotating, re-stir the lumps, and avoid wasting raw materials; at the same time, a cleaning brush is provided at the tail of the mixing pipe to drive the possible lump sediment at the bottom of the mixing chamber to be stirred and mixed again.

[0021] (3) The overall structure is simple, facilitating installation and disassembly.

[0022] This solution also provides a lifting part for the mixing component. The lifting lead screw structure is used to enable the mixing pipe to move up and down. When stirring is required, it moves downward into the mixing chamber, and after completion, it can move upward to disengage from the mixing chamber, facilitating cleaning; the overall structure design is simple, facilitating installation, disassembly, and cleaning. Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of the first perspective of the present utility model.

[0024] Figure 2 It is a structural schematic diagram of the front view semi-section perspective of the present utility model.

[0025] Figure 3 It is a structural schematic diagram of the top view perspective of the present utility model.

[0026] Figure 4 It is a structural schematic diagram of the transmission component of the mixing pipe of the present utility model.

[0027] Figure 5 It is a structural schematic diagram of the lifting part of the present utility model.

[0028] In the figure: 1 - base, 2 - feed cylinder, 3 - mixing chamber, 4 - lifting lead screw, 5 - connecting block, 6 - upper support plate, 7 - lower support plate, 8 - crushing roller, 9 - motor A, 10 - conical groove, 11 - smooth pipe, 12 - mixing pipe, 13 - gear A, 14 - gear B, 15 - small round hole, 16 - fan blade, 17 - short rod, 18 - cleaning brush, 19 - top cover, 20 - delivery pipe, 21 - valve, 22 - motor B, 23 - vertical rod, 24 - lifting motor. Detailed Embodiment

[0029] The following further describes the present utility model with reference to the drawings, but the protection scope of the present utility model is not limited to the following.

[0030] It should be noted that the orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0032] Therefore, based on the above problems, referring to Figure 1 , the present utility model provides a liquid preparation device for fracturing to solve the problems.

[0033] (Embodiment 1)

[0034] Referring to Figures 1 to 5 , a liquid preparation device for fracturing proposed in this implementation scheme includes a base 1, a feeding cylinder 2, a long pipe, a stirring chamber 3, and a lifting part;

[0035] Among them, referring to Figure 1 , the base 1 is arranged on the ground, and the stirring chamber 3 is arranged on the base 1;

[0036] Among them, referring to Figures 2 to 3 , a rotatable crushing roller 8 is inserted in the feeding cylinder 2. One end of the crushing roller 8 is connected to the feeding cylinder 2, and the other end penetrates through the feeding cylinder 2 and is connected to a motor A9. The bottom surface of the feeding cylinder 2 is open and connected to a conical groove 10, and the bottom opening of the conical groove 10 is connected to the long pipe;

[0037] Among them, referring to Figure 4 , the long pipe includes a smooth pipe 11 and a stirring pipe 12; the top end of the smooth pipe 11 is connected to the bottom opening of the conical groove 10, the stirring pipe 12 is rotatably connected to the smooth pipe 11, a gear A13 is sleeved on the upper part of the stirring pipe 12, the gear A13 meshes with a gear B14 arranged on the left side surface of the base 1, and the gear B14 is driven by a motor B22; a plurality of small round holes 15 are opened on the lower pipe body, and a fan blade 16 is also arranged on the pipe body. The lower part of the stirring pipe 12 extends into the stirring chamber 3;

[0038] Among them, referring to Figure 1 and Figure 5, the lifting part is arranged on the right side of the base 1. The lifting part includes a lifting lead screw 4 and a connecting block 5. The lifting lead screw 4 is arranged in the bracket on the right side of the base 1. The top end of the lifting lead screw 4 is connected with a lifting motor 24. A connecting block 5 is arranged on the lifting lead screw 4. The connecting block 5 can move up and down on the lifting lead screw 4. The end face of the connecting block 5 is connected with the end face of the conical groove 10.

[0039] During operation, first start the lifting motor 24. The lifting lead screw 4 rotates and drives the connecting block 5 to move up and down along the lifting lead screw 4, which can drive the conical groove 10 connected to the connecting block 5 to move up and down - so that the long tube can move up and down and be inserted into the mixing chamber 3. Pour the solid material into the feeding tube 2, start the motor A9, and crush the material into dry powder by the crushing roller 8. The material enters the long tube through the conical groove 10. At the same time, add liquid into the mixing chamber 3, start the motor B22. Through the meshing of the gear B14 and the gear A13, the mixing tube 12 rotates in the mixing chamber 3, and the dry powder in the tube is taken out through the small round holes 15 and mixed and stirred with the liquid.

[0040] At present, when the existing liquid preparation device for fracturing mixes solid and liquid in a certain proportion and stirs them evenly, since there are some high molecular compounds (with a density lower than that of water) in the solid material, it is easy to float on the liquid surface when poured into the mixing tank filled with water, and absorb water and agglomerate, resulting in a longer mixing and stirring time - that is, the working efficiency is not high, and it is easy to cause poor quality of the mixed liquid obtained after liquid preparation. And there will be a lot of liquid remaining attached to the inside of the tank and the stirring rod after liquid preparation is completed, but the current liquid preparation device is not easy to clean and disassemble. In this solution, a liquid preparation device for fracturing is designed. The stirring rod designed for stirring is a hollow round tube, and a plurality of small round holes 15 are opened on the mixing tube 12. The mixing tube 12 is inserted into the mixing chamber 3. The solid material is directly poured into the inside of the mixing tube 12. When stirring, the material enters the liquid through the small round holes 15 and is mixed, avoiding floating on the liquid surface or absorbing water and agglomerating due to the low density of the solid. At the same time, this solution is designed with a lifting part, and the lifting part controls the up and down movement of the mixing tube 12, so that the mixing tube 12 and the mixing chamber 3 can be easily disassembled, facilitating the cleaning of the inside of the mixing chamber 3 and the mixing tube 12.

[0041] In this embodiment, refer to Figures 1 to 3, for the design of the feed cylinder 2, the feed cylinder 2 is a cylinder with openings at both the top and bottom. A rotatable crushing roller 8 is disposed through the feed cylinder 2. Two crushing rollers 8 are arranged adjacent to each other, and sawteeth for grinding and crushing solid materials are provided on the roller bodies of the crushing rollers 8. One end of each of the two crushing rollers 8 is connected to a motor A9 respectively. By starting the motor A9, the crushing rollers 8 rotate to crush the solid raw materials entering the feed cylinder 2; the feed cylinder 2 is connected to a conical groove 10. The conical groove 10 is disposed through the inside of a rectangular plate. The upper notch of the conical groove 10 is connected to the bottom surface of the feed cylinder 2. The diameter of the lower notch of the conical groove 10 is much smaller than that of the upper notch. The material can slide down to the lower notch through the inclined surface of the conical groove 10 and then enter the long tube accordingly.

[0042] In this embodiment, referring to Figure 4 , for the design of the long tube, the long tube includes a smooth tube 11 and a stirring tube 12. The smooth tube 11 is a short tube. One end of the smooth tube 11 is fixedly connected to the lower notch of the conical groove 10, and the diameter of the smooth tube 11 is larger than that of the stirring tube 12. The stirring tube 12 is rotatably inserted into the smooth tube 11; the upper part of the stirring tube 12 is located outside the stirring chamber 3, and a gear A13 is sleeved on the upper tube body. The gear A13 meshes with a gear B14 provided on the side surface of the setting base 1. By driving the gear B14 to rotate with the motor B22, the gear A13 is driven to rotate - so that the stirring tube 12 rotates, thereby realizing stirring; a plurality of small round holes 15 are provided on the tube body of the stirring tube 12 extending into the stirring chamber 3. When the dry powder material enters the stirring tube 12, the stirring tube 12 rotates in the stirring chamber 3, and the dry powder enters the liquid through the small round holes 15 for mixing. Compared with the method of directly pouring the dry powder from above the stirring chamber 3 and using a stirring rod for stirring in the market, it can be more fully mixed. And because the solid material is likely to float and agglomerate on the water surface, the stirring tube 12 with small round holes 15 can directly let the dry powder enter the interior of the liquid and be stirred evenly, avoiding being blocked due to dry powder agglomeration during the liquid preparation and stirring process; two groups of symmetrically arranged fan blades 16 are installed on the tube body of the stirring tube 12. The fan blades 16 are in a rectangular frame structure. A plurality of short rods 17 are vertically arranged inside the fan blades 16 and perpendicular to the stirring tube 12. The outer frame edge of the frame of the fan blades 16 can contact the side wall of the stirring chamber 3. When rotating, the fan blades 16 can scrape the possible residual solid attachments on the side wall and continue to stir and mix, avoiding waste of materials and making the stirring more sufficient, and also making the subsequent cleaning more convenient.

[0043] Furthermore, referring to Figure 4 , a cleaning brush 18 is further provided at the tail end of the long tube. The cleaning brush 18 is also perpendicular to the long tube. When the stirring rod rotates, the cleaning brush 18 rotates at the bottom of the stirring chamber 3, and can stir up the possible agglomerated solids at the bottom, making the mixing and stirring more sufficient.

[0044] In this embodiment, referring to Figure 1 andFigure 3 For the design of the stirring tank 3, a top cover 19 is provided on the top surface of the stirring tank 3. A liquid delivery pipe 20 for delivering liquid is installed on the top cover 19. The delivery pipe 20 is controlled by a valve 21 to open and close. At the same time, an opening for inserting the stirring pipe 12 is provided at the center position of the top cover 19, so that the stirring pipe 12 can be directly inserted into the stirring tank 3 through lifting, which facilitates the installation and disassembly of the entire device.

[0045] In this embodiment, for the design of the base 1, the base 1 is a concave frame, and the stirring tank 3 is arranged inside the concave frame. An upper support plate 6 and a lower support plate 7 are provided on the right side surface of the base 1, and the lifting part is arranged between the upper support plate 6 and the lower support plate 7; a straight rod vertically extends from the left side surface of the base 1, and a motor B22 is installed on the straight rod. The motor B22 is a double-output shaft motor, the upper motor shaft of which is rotatably inserted into the straight rod, and the lower motor shaft thereof is provided with a gear B14, and the gear B14 meshes with the gear A13.

[0046] In this embodiment, referring to Figure 5 For the design of the lifting part, it further includes a vertical rod 23; the lifting motor 24 is arranged on the upper support plate 6 on the right side of the base 1. The upper support plate 6 is provided with a through hole and the motor shaft of the lifting motor 24 passes through the through hole and is connected to the lifting lead screw 4 through a coupling. One end of the lifting lead screw 4 is connected to the lifting motor 24, and the other end is connected to the lower support plate 7; two vertical rods 23 (the vertical rods 23 are located on the left and right sides of the lifting lead screw 4) are also connected between the upper support plate 6 and the lower support plate 7, which play a role in stabilizing and supporting the device. A connecting block 5 penetrates through the three of the two vertical rods 23 and the lifting lead screw 4. Three holes are opened on the connecting block 5 for inserting into the vertical rods 23 and the lifting lead screw 4, and the middle hole of the connecting block 5 is a threaded hole that cooperates with the lifting lead screw 4. When the lifting motor 24 is started, the lifting lead screw 4 drives the connecting block 5 to move up and down along the lifting lead screw 4. At the same time, the end face of the connecting block 5 is connected to the end face of the rectangular plate with a tapered groove 10 - that is, when the connecting block 5 moves up and down, the rectangular plate moves up and down to drive the connected long pipe to move up and down.

[0047] The utility model relates to a liquid preparation device for fracturing. First, the solid raw materials for preparing the fracturing fluid are poured into the feeding cylinder 2, the motor A9 is started, and the solid raw materials are ground and crushed into dry powder by the crushing roller 8. The dry powder enters the long pipe through the following tapered groove 10; at the same time, the liquid for solid-liquid mixing should be added to the stirring tank 3 first, and then the lifting motor 24 is started. The lifting lead screw 4 drives the connecting block 5 to drive the long pipe to move up and down, so that the stirring pipe 12 is inserted into the stirring tank 3. Then the motor B22 is started, and the stirring pipe 12 is rotated through the meshing transmission of the gear B14 and the gear A13. The dry powder in the pipe is carried out through the small round holes 15 on the pipe and stirred and mixed with the liquid.

[0048] At present, the existing liquid preparation devices for preparing fracturing fluids need to mix and stir raw materials in solid and liquid forms in a certain proportion. Usually, the solid dry powder is directly poured into the stirring tank to be mixed with the liquid, and then stirred and mixed evenly by a stirring rod to form the fracturing fluid. However, since there are some high-molecular compounds in the solid, whose density is smaller than that of water, they are prone to floating on the surface when poured into the tank from top to bottom. And when too much dry powder is poured at one time, it is easy to absorb water and form lumps, which makes the stirring and mixing time longer, resulting in low work efficiency. Moreover, the formed lumps are prone to adhering to the bottom or side walls of the tank without being stirred, which not only wastes materials but also is not convenient for cleaning. The liquid preparation device designed in this solution has the stirring rod designed as a hollow circular tube with multiple small round holes 15 opened, and the solid materials directly enter the stirring tube 12 after being ground. When the stirring tube 12 rotates, the dry powder enters the liquid through the small round holes 15 and is stirred evenly due to the rotation, avoiding the lump formation problem caused by the solid density. And in this solution, frame-shaped fan blades 16 and cleaning brushes 18 are provided on the stirring tube 12, which can scrape the possible residues on the side walls and the bottom during rotation, making the solid-liquid mixing more uniform and reducing the waste of materials. There is also a lifting part provided to make the stirring tube 12 detachable from the stirring chamber 3, with a simple structure, convenient for installation, disassembly and cleaning.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A liquid preparation device for fracturing, comprising a base (1) and a stirring chamber (3); the base (1) is arranged on the ground, and the stirring chamber (3) is arranged on the base (1); it is characterized in that: It also includes a feed cylinder (2) and a stirring tube (12); A crushing component driven by a motor A (9) is arranged in the feed cylinder (2) to grind and crush solid raw materials; The stirring tube (12) is connected to the feed cylinder (2) through a smooth tube (11), and the stirring tube (12) can be rotatably inserted into the stirring chamber (3) by a driving component. The inside of the stirring tube (12) is hollow and there are a plurality of small round holes (15) on the tube body; A plurality of fan blades (16) are arranged on the stirring tube (12) to stir and mix the solid dry powder and water in the stirring chamber (3); When working, first the crushing component in the feed cylinder (2) crushes the solid raw materials into dry powder, and then directly conveys the dry powder into the stirring tube (12). Start the driving component to make the stirring tube (12) rotate in the stirring chamber (3) filled with water. The dry powder is brought into the water through a plurality of small round holes (15) on the tube body and stirred and mixed with the water to form a fracturing fluid.

2. The liquid preparation device for fracturing according to claim 1, characterized in that: The driving component includes a gear A (13) and a gear B (14); the gear A (13) is sleeved on the stirring tube (12), and the gear A (13) meshes with the gear B (14) arranged on the left side of the base (1). The gear B (14) is driven by a motor B (22).

3. The fluid preparation device for fracturing according to claim 2, characterized in that: The fan blades (16) are arranged on the tube body of the stirring tube (12), and the fan blades (16) are rectangular frames. The rectangular frame edges are in contact with the side wall of the stirring chamber (3) to clean the side wall, and a plurality of short rods (17) are arranged inside the fan blades (16) for stirring.

4. A liquid preparation device for fracturing according to claim 3, characterized in that: A cleaning brush (18) is arranged at the tail of the stirring tube (12). The cleaning brush (18) is in contact with the bottom of the stirring chamber (3). When the stirring tube (12) rotates, the cleaning brush (18) scrapes and cleans the bottom of the stirring chamber (3).

5. The liquid preparation device for fracturing according to claim 1, wherein: The feed cylinder (2) and the stirring tube (12) are docked by a conical groove (10). The upper notch of the conical groove (10) is connected to the bottom of the feed cylinder (2), and the lower notch is connected to the smooth tube (11). The upper notch is much larger than the lower notch, and the ground dry powder slides directly into the stirring tube (12) through the inclined surface of the conical groove (10).

6. The liquid preparation device for fracturing according to claim 5, wherein: It also includes a lifting part; the lifting part includes a lifting lead screw (4) and a connecting block (5); the lifting lead screw (4) is cooperatively arranged with the connecting block (5). The connecting block (5) is connected to the conical groove (10). The lifting lead screw (4) is rotated by a lifting motor (24) to drive the connecting block (5) to move up and down, so as to move the stirring tube (12) connected to the conical groove (10) up and down, forming a structure convenient for disassembly and cleaning between the stirring tube (12) and the stirring chamber (3).

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