Controllable liquid preparation device and method for large-scale volume fracturing fluid of oil and gas well

Abstract

The invention provides a controllable liquid preparation device and method for large-scale volume fracturing fluid of an oil and gas well, and belongs to the technical field of fracturing fluid preparation. Comprising a main frame, a stirring tank is fixedly connected to the top of the main frame, an upper connecting pipe and a lower connecting pipe are fixedly connected to the two sides of the stirring tank correspondingly, sealing rings are fixedly connected to the interiors of the upper connecting pipe and the lower connecting pipe correspondingly, and the interiors of the two sealing rings are rotationally connected with the same rotating rod. By arranging the driving assembly and the side rotating assembly, when the rotating rod drives the stirring assembly to perform vertical stirring, the rotating rod can drive the driving assembly to perform synchronous rotation, so that the driving assembly can drive the side rotating assembly to perform transverse rotation under the limiting of the limiting seat, and the device can perform vertical stirring under the condition of not adding redundant power; the raw materials can be stirred in two directions at the same time, so that the raw materials do irregular movement in the stirring tank, the common caking phenomenon in solid-liquid mixing is effectively avoided, and the working efficiency of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing fluid preparation, and in particular to a controllable liquid distribution device and method for large-scale volume fracturing fluid for oil and gas wells. Background Art

[0002] In the exploitation of modern oil and gas wells, there are many steps to facilitate safe exploitation. One of the steps is to inject fracturing fluid into the formation through a high-pressure pump so that the high-pressure energy of the ground equipment can be transferred to the formation, causing cracks in the formation rock under pressure. The formation of these cracks provides a channel for the subsequent flow of oil and gas. The fracturing fluid is composed of many raw materials, which are divided into two categories: liquid and solid. The liquid is specifically composed of water and other liquid additives, and the solid is composed of quartz sand and ceramic particles. When working, it is usually necessary to prepare the fracturing fluid through a controllable liquid distribution device to facilitate work. Among water-based fracturing fluids, low-cost slick water fracturing fluids account for more than 90%. The core component of slick water fracturing fluids is drag reducers, including three types: synthetic emulsions, suspensions and powdered particles.

[0003] When preparing fracturing fluid, the existing controllable fracturing fluid dispensing device generally pours the raw materials into a mixing tank, and then drives the stirring blades inside the mixing tank to rotate through a motor to mix the raw materials. After stirring, the fracturing fluid is discharged through a high-pressure pump and transported to the oil and gas well. However, in actual work, it can only drive the stirring blades to stir vertically through the motor, which makes the efficiency of stirring the raw materials not high enough. Since oil and gas wells are generally large in volume and depth, a large amount of fracturing fluid needs to be input. Since it is difficult for the device to quickly prepare fracturing fluid, the time required for fracturing work is relatively long, which greatly reduces the work efficiency.

[0004] Therefore, the present invention provides a controllable liquid distribution device and method for large-scale volume fracturing fluid in oil and gas wells to meet the needs. Summary of the invention

[0005] The present invention provides a controllable liquid distribution device and method for large-scale volume fracturing fluid in oil and gas wells, which can solve the problem that in the prior art, in actual work, the stirring blades can only be driven by a motor to perform vertical stirring, which makes the stirring efficiency of the raw materials not high enough. Since oil and gas wells are generally large in volume and depth, a large amount of fracturing fluid needs to be input. Since it is difficult for the device to quickly prepare the fracturing fluid, the time required for the fracturing work is relatively long, which greatly reduces the work efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A controllable liquid distribution device for large-scale volume fracturing fluid in oil and gas wells, comprising a main frame, the top of which is fixedly connected to a stirring tank, the two sides of which are respectively fixedly connected to an upper connecting pipe and a lower connecting pipe, the interiors of the upper connecting pipe and the lower connecting pipe are fixedly connected to sealing rings, the interiors of the two sealing rings are rotatably connected to the same rotating rod, the outer side of the rotating rod is fixedly connected to a plurality of mounting rings, the top and bottom of the mounting rings are fixedly connected to a limiting seat; a stirring assembly, the stirring assembly is used for vertical stirring, and the stirring assembly is connected to the rotating rod; a side-rotation assembly, the side-rotation assembly is used for horizontal stirring, and the side-rotation assembly is connected to the limiting seat; a driving assembly, the driving assembly is used to drive the side-rotation assembly to rotate, and the driving assembly is connected to the rotating rod.

[0007] Optionally, the number of the stirring components is three, all of which are located inside the stirring tank, the number of the driving components and the limiting seats are two each, all of which are staggered with the stirring components, and the driving components are located on the inner sides of the two limiting seats.

[0008] Optionally, the stirring assembly includes a fixed ring fixedly connected to the outside of the rotating rod, a plurality of stirring blades are fixedly connected to the outside of the fixed ring, a plurality of flow grooves are sequentially opened on one side of the stirring blade from top to bottom, and a plurality of guide holes are sequentially opened inside the stirring blade from top to bottom.

[0009] Optionally, the number of the stirring blades is four, which are distributed in a ring outside the fixed ring, the flow groove is an arc shape bent outward, the number of guide holes inside the same stirring blade is three, and the diameter of the guide hole increases the farther away from the fixed ring.

[0010] Optionally, the driving assembly includes a connecting disk fixedly connected to the rotating rod, and the inner parts of the two connecting disks away from each other are fixedly connected with inner gear rings, and the side rotation assembly includes a rotating shaft rotatably connected to the limit seat, and the outer side of the rotating shaft close to one end of the limit seat is fixedly connected with a driven gear, and the side of the rotating shaft away from the limit seat is fixedly connected with a side rotation blade.

[0011] Optionally, the rotating shaft is located inside the limit seat and fixedly connected to the limit block, the upper and lower ends of the inner gear ring are respectively meshed with the corresponding two driven gears, a locking groove is opened inside the mounting ring, and the contact surface between the rotating rod and the mounting ring is fixedly connected with a locking ring whose position and shape are matched with the locking groove.

[0012] Optionally, limiting rods are fixedly connected to both sides of the mounting ring, sliding seats are fixedly connected to both sides of the inner cavity of the stirring tank, one end of the limiting rod away from the mounting ring is slidably connected to the inside of the corresponding sliding seat, and one end of the limiting rod located inside the sliding seat is fixedly connected to a sliding block.

[0013] Optionally, a telescopic assembly is fixed to the end of the lower connecting tube away from the stirring tank, and the telescopic assembly includes a telescopic motor fixedly connected to the outside of the lower connecting tube, the output end of the telescopic motor is fixedly connected to a screw rod, the outer side of the screw rod is threadedly connected to a shift plate, the middle part of the shift plate is fixedly connected to the rotating rod, the shift plate is internally slidingly connected to an end of the screw rod, and the side sliding rod is fixedly connected to the outside of the lower connecting tube, the side of the upper connecting tube away from the stirring tank is fixedly connected to a limiting structure, the limiting structure is fixedly connected to a stirring motor on a side close to the rotating rod, and the output end of the stirring motor is fixedly connected to the rotating rod.

[0014] Optionally, the top of the stirring tank is fixedly connected to a feeding pipe, the inside of the feeding pipe is coated with an anti-adhesion coating, the end of the lower connecting pipe away from the stirring tank is fixedly connected to a discharge pipe, the inside of the main frame is fixedly connected to a discharge pump, the discharge pipe is fixedly connected to the input end of the discharge pump through a connecting pipe, and the output end of the discharge pump is fixedly connected to a discharge pipe.

[0015] A method for a large-scale volume fracturing fluid controllable dispensing device for oil and gas wells comprises the following steps: S1: The device is installed on top of the external equipment through the main frame and transported. The required fracturing fluid raw materials are added into the mixing tank through the feeding pipe. The stirring motor located on one side of the upper connecting pipe is started to drive the rotating rod to rotate, so that the stirring assembly starts to rotate. The flow grooves and guide holes on the stirring blades help the liquid to mix and flow better, realizing vertical stirring.

[0016] S2: When the rotating rod rotates, it will drive the driving assembly to rotate synchronously. The connecting plate drives the driven gear and the rotating shaft to rotate through the meshing of the inner gear ring and the driven gear, so that the side rotating blades start to rotate to achieve lateral stirring. The telescopic motor is started to drive the screw rod to rotate forward and reverse repeatedly, so that the shift plate drives the rotating rod to move back and forth repeatedly, and the limiting structure assists the rotating rod and the stirring motor at one end of the upper connecting pipe to move, so as to stir the fracturing fluid more fully.

[0017] S3: After the mixing is completed, the discharge pump is started to extract the fracturing fluid inside the mixing tank through the discharge pipe, and then discharged into the oil and gas well through the discharge pipe to work.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a driving assembly and a side-rotating assembly, when the rotating rod drives the stirring assembly to perform vertical stirring, the rotating rod will drive the driving assembly to rotate synchronously, so that the driving assembly will drive the side-rotating assembly to rotate horizontally under the limit of the limit seat, so that the device can stir the raw materials in two directions at the same time without adding excess power, and make the raw materials move irregularly inside the stirring tank, effectively avoiding the common agglomeration phenomenon of solid-liquid mixing, facilitating the rapid production of evenly stirred fracturing fluid, and improving the working efficiency of the device. Combined with the anti-adhesion coating on the inside of the feeding tube, the material is prevented from adhering to the inside of the feeding tube, which greatly improves the fluidity of the material.

[0019] By arranging flow grooves and guide holes inside the stirring component, when the stirring blade stirs the raw materials, the flow groove can guide the raw materials to flow outward while being stirred through its own arc design of bending outward. Combined with multiple guide holes with gradually increasing diameters, the device can guide raw materials with larger particles to flow outward when stirring the raw materials, making their rotation trajectory longer and achieving better stirring effect. In addition, a bolt-shaped vortex pointing outward is formed inside the stirring tube, which further increases the direction of force on the raw materials and improves the stirring effect.

[0020] By setting up the telescopic component, the motor and the screw can drive the moving rod to perform reciprocating motion. In combination with the stirring component and the side-rotating component, the device can achieve stirring of every part inside the stirring tank with fewer stirring blades, and when the moving rod moves, it will further disrupt the movement pattern of the raw materials, so as to achieve more comprehensive stirring of the raw materials, greatly improving the stirring efficiency and the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a large-scale volume fracturing fluid controllable dispensing device for oil and gas wells; Figure 2 for Figure 1 A magnified schematic diagram of point A; Figure 3 It is a schematic diagram of the three-dimensional structure of the stirring tank; Figure 4 for Figure 3 An enlarged schematic diagram of point B; Figure 5 A schematic diagram of the three-dimensional structure of the mixing tank and the rotating rod; Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating rod and the stirring assembly; Figure 7 It is a schematic diagram of the three-dimensional structure of the driving assembly and the side-rotating assembly; Figure 8 It is a schematic diagram of the three-dimensional structure of the stirring component.

[0022] [Reference Signs] 1. Main frame; 2. Mixing tank; 3. Upper connecting pipe; 4. Lower connecting pipe; 5. Rotating rod; 6. Mixing assembly; 601. Fixed ring; 602. Mixing blade; 603. Flow groove; 604. Guide hole; 7. Driving assembly; 701. Connecting plate; 702. Inner gear ring; 8. Mounting ring; 9. Side rotation assembly; 901. Rotating shaft; 902. Driven gear; 903. Side rotation blade; 10. Limiting rod; 11. Positioning groove; 12. Limiting seat; 13. Sliding seat; 14. Sealing ring; 15. Drain pipe; 16. Discharge pump; 17. Discharge pipe; 18. Feeding pipe; 19. Telescopic assembly; 1901. Telescopic motor; 1902. Screw rod; 1903. Shift plate; 1904. Side sliding rod; 20. Limiting structure. DETAILED DESCRIPTION

[0023] The following is a detailed description of a large-scale volume fracturing fluid controllable dispensing device and method for oil and gas wells provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are preferred embodiments, and for some known technologies, those skilled in the art may also adopt other alternatives.

[0024] like Figures 1 to 8 As shown, an embodiment of the present invention provides a large-scale volume fracturing fluid controllable dispensing device for oil and gas wells, comprising a main frame 1, a stirring tank 2 is fixedly connected to the top of the main frame 1, an upper connecting pipe 3 and a lower connecting pipe 4 are fixedly connected to the two sides of the stirring tank 2, a sealing ring 14 is fixedly connected to the interior of the upper connecting pipe 3 and the lower connecting pipe 4, a rotating rod 5 and a stirring assembly 6 are rotatably connected to the interior of the two sealing rings 14, and the stirring assembly 6 is used for vertical stirring. The stirring assembly 6 is connected to the rotating rod 5. There are three stirring assemblies 6, which are all located inside the stirring tank 2. 6 comprises a fixing ring 601 fixedly connected to the outer side of the rotating rod 5, a plurality of stirring blades 602 are fixedly connected to the outer side of the fixing ring 601, a plurality of flow grooves 603 are sequentially opened on one side of the stirring blade 602 from top to bottom, a plurality of guide holes 604 are sequentially opened inside the stirring blade 602 from top to bottom, the number of stirring blades 602 is four, which are annularly distributed on the outer side of the fixing ring 601, the flow grooves 603 are in the shape of an arc bent outward, the number of guide holes 604 inside the same stirring blade 602 is three, and the diameter of the guide holes 604 is larger as it is farther away from the fixing ring 601.

[0025] The flow groove 603 is embedded in the form of an arc curved outward along the edge of the stirring blade 602. It adopts the principle of fluid dynamics and can effectively guide the flow direction of the raw materials during the stirring process. When the stirring blade 602 rotates, the arc shape of the flow groove 603 will produce a centripetal force, which prompts the raw materials to not only be mixed internally under the action of the stirring blade 602, but also be guided to flow outward at the same time. This two-way flow mode breaks the single path of traditional stirring, making the distribution of the raw materials in the stirring tank 2 more uniform and reducing the mixing dead angle; the guide hole 604 adopts a design of gradually expanding diameter to simulate the effect of fluid acceleration. During the stirring process, as the stirring blade 602 rotates, the raw materials are sucked into the guide hole 604 under the action of the pressure difference. 04, and undergoes an acceleration process in the channel. Due to the gradual expansion of the diameter of the guide hole 604, the raw materials obtain a higher speed and a wider dispersion angle when flowing out, which further promotes the mixing and collision between the raw materials; the flow groove 603 and the guide hole 604 can cooperate with each other to form a unique bolt-shaped vortex extending outward inside the stirring tank 2, which not only increases the force direction and force frequency of the raw materials during the stirring process, but also makes the movement trajectory of the raw materials in the stirring tank 2 more complex and changeable. The raw materials with larger particles are forced to rotate along a longer path under the impetus of the vortex, thereby obtaining more sufficient mixing opportunities. At the same time, the existence of the vortex also promotes turbulent mixing between the raw materials, further improving the uniformity and efficiency of stirring.

[0026] like Figures 1 to 7As shown, a plurality of mounting rings 8 are fixedly connected to the outer side of the rotating rod 5, and the top and bottom of the mounting ring 8 are fixedly connected to the limit seat 12, a side rotation component 9, the side rotation component 9 is used for lateral stirring, the side rotation component 9 is connected to the limit seat 12, a driving component 7, the driving component 7 is used to drive the side rotation component 9 to rotate, the driving component 7 is connected to the rotating rod 5, the number of the driving components 7 and the limit seat 12 are both two, and they are staggered with the stirring component 6. The driving component 7 is located on the inner side of the two limit seats 12, the driving component 7 includes a connecting disk 701 fixedly connected to the rotating rod 5, and the inner parts of the two connecting disks 701 away from each other are fixedly connected with an inner gear ring 702, the side rotation component 9 includes a rotating shaft 901 rotatably connected to the limit seat 12, and the rotating shaft 901 is close to the limit A driven gear 902 is fixedly connected to the outer side of one end of the positioning seat 12, and a side rotating vane 903 is fixedly connected to the side of the rotating shaft 901 away from the limiting seat 12. The rotating shaft 901 is located inside the limiting seat 12 and is fixedly connected to a limiting block. The upper and lower ends of the inner gear ring 702 are respectively meshed with the two corresponding driven gears 902. A locking groove 11 is opened inside the mounting ring 8, and a locking ring whose position and shape are matched with the locking groove 11 is fixedly connected to the contact surface between the rotating rod 5 and the mounting ring 8. Limiting rods 10 are fixedly connected to both sides of the mounting ring 8, and sliding seats 13 are fixedly connected to both sides of the inner cavity of the mixing tank 2. The end of the limiting rod 10 away from the mounting ring 8 is slidably connected to the inside of the corresponding sliding seat 13, and the end of the limiting rod 10 located inside the sliding seat 13 is fixedly connected to a sliding block.

[0027] As the rotating rod 5 rotates, the connecting disk 701 rotates accordingly, and then the power is transmitted to the rotating shaft 901 through the precise meshing of the inner ring gear 702 and the driven gear 902. This process does not require an additional power source, and completely relies on the inertia of the rotation of the rotating rod 5 and the ingenious design of the mechanical structure to achieve efficient energy conversion and transmission. After the side-rotating component 9 receives the power from the driving component 7, the rotating shaft 901 begins to rotate horizontally under the precise limit of the limit seat 12. The limit seat 12 not only ensures the stability of the rotating shaft 901, but also limits its rotation range, avoiding mechanical damage or uneven stirring caused by excessive rotation. The side-rotating blade 903 rotates rapidly with the rotation of the rotating shaft 901, complementing the vertical stirring of the stirring component 6, and together constructing a Multi-dimensional stirring environment. In this dual stirring mode, the raw materials no longer simply flow in a certain direction inside the stirring tank 2, but present an irregular, multi-directional transportation state. This movement mode greatly increases the contact area and collision frequency between the raw materials, and promotes the rapid mixing and uniform distribution of various components. Compared with the traditional unidirectional stirring method, this multi-dimensional stirring technology significantly improves the mixing efficiency and shortens the stirring time, thereby accelerating the output rate of the fracturing fluid, and realizing efficient miscibility of polymer dry powder and water. It effectively solves the technical problems of uneven dispersion, easy generation of "fish eyes", uncontrollable viscosity and other technical problems in the solid-liquid mixing process of the existing process, avoids the common agglomeration phenomenon of solid-liquid mixing, and enables the polymer and water to achieve perfect hydration to meet the technical requirements of on-site construction.

[0028] like Figures 1 to 6 As shown, a telescopic assembly 19 is fixed to one end of the lower connecting tube 4 away from the stirring tank 2, and the telescopic assembly 19 includes a telescopic motor 1901 fixedly connected to the outer side of the lower connecting tube 4, and the output end of the telescopic motor 1901 is fixedly connected to a screw rod 1902, and the outer side of the screw rod 1902 is threadedly connected to a shift plate 1903, and the middle part of the shift plate 1903 is fixedly connected to the rotating rod 5, and the shift plate 1903 is slidably connected to the inner side of the end away from the screw rod 1902 with a side sliding rod 1904, and the side sliding rod 1904 is fixedly connected to the outer side of the lower connecting tube 4, and the side of the upper connecting tube 3 away from the stirring tank 2 is fixedly connected to a limiting structure 20, and the limiting structure The structure 20 includes a mounting plate, both ends of which are slidably connected to limit rods, the two limit rods are fixedly connected to the upper connecting pipe 3, the side of the limiting structure 20 close to the rotating rod 5 is fixedly connected to a stirring motor, the output end of the stirring motor is fixedly connected to the rotating rod 5, the top of the stirring tank 2 is fixedly connected to a feeding pipe 18, the inside of the feeding pipe 18 is coated with an anti-adhesion coating, the end of the lower connecting pipe 4 away from the stirring tank 2 is fixedly connected to a discharge pipe 15, the inside of the main frame 1 is fixedly connected to a discharge pump 16, the discharge pipe 15 is fixedly connected to the input end of the discharge pump 16 through a connecting pipe, and the output end of the discharge pump 16 is fixedly connected to a discharge pipe 17.

[0029] The anti-adhesion coating provided inside the feeding pipe 18 greatly improves the fluidity of the material, ensures the feeding amount of the material, further improves the working efficiency of the device, and facilitates the device to quickly produce the processed fracturing fluid.

[0030] Working in coordination with the stirring assembly 6 and the side-rotating assembly 9, the role of the telescopic assembly 19 is more prominent. Although the number of stirring blades 602 and side-rotating blades 903 is limited, they can cover most of the positions inside the stirring tank 2 through the repeated movement of the rotating rod 5. When the rotating rod 5 moves, it not only directly promotes the flow of the surrounding raw materials, but also further disrupts the movement pattern of the raw materials by changing the relative position with the raw materials. This dynamic stirring method makes the movement trajectory of the raw materials in the stirring tank 2 more complex and changeable, promotes the full mixing and collision between the raw materials, improves the comprehensiveness and efficiency of the stirring of the device, and also breaks the movement pattern of the raw materials through dynamic stirring, realizes a more thorough mixing of the raw materials, and greatly improves the practicability of the device.

[0031] A method for a large-scale volume fracturing fluid controllable dispensing device for oil and gas wells comprises the following steps: S1: The device is installed on top of the external equipment through the main frame 1 and transported. The required fracturing fluid raw materials are added into the stirring tank 2 through the feeding pipe 18. The stirring motor located on one side of the upper connecting pipe 3 is started to drive the rotating rod 5 to rotate, so that the stirring assembly 6 starts to rotate. The flow groove 603 and the guide hole 604 on the stirring blade 602 help the liquid to mix and flow better, thereby realizing vertical stirring.

[0032] S2: When the rotating rod 5 rotates, it will drive the driving assembly 7 to rotate synchronously. The connecting disk 701 drives the driven gear 902 and the rotating shaft 901 to rotate through the meshing of the inner ring gear 702 and the driven gear 902, so that the side rotating blades 903 start to rotate to achieve horizontal stirring. The telescopic motor 1901 is started to drive the screw rod 1902 to rotate forward and reverse repeatedly, so that the moving plate 1903 drives the rotating rod 5 to move back and forth repeatedly, and the limiting structure 20 assists the rotating rod 5 and the stirring motor located at one end of the upper connecting pipe 3 to move, so as to stir the fracturing fluid more fully.

[0033] S3: After the stirring is completed, the discharge pump 16 is started to extract the fracturing fluid in the stirring tank 2 through the discharge pipe 15, and then the fracturing fluid is discharged into the oil and gas well through the discharge pipe 17 to work.

[0034] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0035] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A controllable liquid dispensing device for large-scale volume fracturing fluid in oil and gas wells, comprising a main frame (1), characterized in that: The top of the main frame (1) is fixedly connected to a stirring tank (2), and the two sides of the stirring tank (2) are respectively fixedly connected to an upper connecting pipe (3) and a lower connecting pipe (4), and the interiors of the upper connecting pipe (3) and the lower connecting pipe (4) are fixedly connected to sealing rings (14), and the interiors of the two sealing rings (14) are rotatably connected to the same rotating rod (5), and the outer side of the rotating rod (5) is fixedly connected to a plurality of mounting rings (8), and the top and bottom of the mounting ring (8) are fixedly connected to a limiting seat (12); A stirring assembly (6), the stirring assembly (6) being used for vertical stirring, the stirring assembly (6) being connected to the rotating rod (5); A side-rotating component (9), the side-rotating component (9) being used for performing lateral stirring, the side-rotating component (9) being connected to a limiting seat (12); A driving assembly (7), wherein the driving assembly (7) is used to drive the side-spinning assembly (9) to rotate, and the driving assembly (7) is connected to the rotating rod (5).

2. A controllable liquid distribution device for large-scale fracturing fluid in oil and gas wells according to claim 1, characterized in that: The number of the stirring components (6) is three, and they are all located inside the stirring tank (2). The number of the driving components (7) and the limiting seats (12) are both two, and they are staggered with the stirring components (6). The driving components (7) are located on the inner sides of the two limiting seats (12).

3. The large-scale volume fracturing fluid controllable dispensing device for oil and gas wells according to claim 1, characterized in that: The stirring assembly (6) comprises a fixing ring (601) fixedly connected to the outside of the rotating rod (5), a plurality of stirring blades (602) being fixedly connected to the outside of the fixing ring (601), a plurality of flow grooves (603) being sequentially provided on one side of the stirring blade (602) from top to bottom, and a plurality of flow guide holes (604) being sequentially provided inside the stirring blade (602) from top to bottom.

4. A controllable liquid distribution device for large-scale fracturing fluid in oil and gas wells according to claim 3, characterized in that: The number of the stirring blades (602) is four, and they are distributed in a ring shape outside the fixing ring (601). The flow groove (603) is an arc shape that bends outward. The number of the guide holes (604) inside the same stirring blade (602) is three, and the diameter of the guide hole (604) increases as it is farther away from the fixing ring (601).

5. The large-scale volume fracturing fluid controllable dispensing device for oil and gas wells according to claim 1, characterized in that: The driving assembly (7) comprises a connecting disk (701) fixedly connected to the rotating rod (5), and the inner parts of the two connecting disks (701) at the ends away from each other are fixedly connected to inner gear rings (702). The side rotation assembly (9) comprises a rotating shaft (901) rotatably connected to the limit seat (12), and the outer side of the rotating shaft (901) close to the limit seat (12) is fixedly connected to a driven gear (902), and the side of the rotating shaft (901) away from the limit seat (12) is fixedly connected to a side rotation blade (903).

6. A controllable liquid distribution device for large-scale fracturing fluid in oil and gas wells according to claim 5, characterized in that: The rotating shaft (901) is located inside the limiting seat (12) and is fixedly connected to the limiting block. The upper and lower ends of the inner gear ring (702) are respectively meshed with the corresponding two driven gears (902). A locking groove (11) is provided inside the mounting ring (8). The contact surface between the rotating rod (5) and the mounting ring (8) is fixedly connected with a locking ring whose position and shape are compatible with the locking groove (11).

7. A controllable liquid distribution device for large-scale fracturing fluid in oil and gas wells according to claim 6, characterized in that: Limit rods (10) are fixedly connected to both sides of the mounting ring (8), sliding seats (13) are fixedly connected to both sides of the inner cavity of the stirring tank (2), one end of the limit rod (10) away from the mounting ring (8) is slidably connected to the inside of the corresponding sliding seat (13), and one end of the limit rod (10) located inside the sliding seat (13) is fixedly connected to a sliding block.

8. The large-scale volume fracturing fluid controllable dispensing device for oil and gas wells according to claim 1, characterized in that: A telescopic assembly (19) is fixed to one end of the lower connecting tube (4) away from the stirring tank (2), the telescopic assembly (19) comprising a telescopic motor (1901) fixedly connected to the outside of the lower connecting tube (4), the output end of the telescopic motor (1901) is fixedly connected to a screw rod (1902), the outer side of the screw rod (1902) is threadedly connected to a shift plate (1903), the middle part of the shift plate (1903) is fixedly connected to the rotating rod (5), the inner part of the shift plate (1903) away from one end of the screw rod (1902) is slidably connected to a side sliding rod (1904), the side sliding rod (1904) is fixedly connected to the outside of the lower connecting tube (4), the side of the upper connecting tube (3) away from the stirring tank (2) is fixedly connected to a limiting structure (20), the side of the limiting structure (20) close to the rotating rod (5) is fixedly connected to the stirring motor, and the output end of the stirring motor is fixedly connected to the rotating rod (5).

9. The large-scale volume fracturing fluid controllable dispensing device for oil and gas wells according to claim 1, characterized in that: The top of the stirring tank (2) is fixedly connected to a feeding pipe (18), the interior of the feeding pipe (18) is coated with an anti-adhesion coating, the end of the lower connecting pipe (4) away from the stirring tank (2) is fixedly connected to a discharge pipe (15), the interior of the main frame (1) is fixedly connected to a discharge pump (16), the discharge pipe (15) is fixedly connected to the input end of the discharge pump (16) through a connecting pipe, and the output end of the discharge pump (16) is fixedly connected to a discharge pipe (17).

10. The present invention also provides a method for a large-scale volume fracturing fluid controllable dispensing device for oil and gas wells, comprising the following steps: S1: The device is installed above the external equipment through the main frame (1) and transported, and the required fracturing fluid raw materials are added into the stirring tank (2) through the feeding pipe (18), and the stirring motor located on one side of the upper connecting pipe (3) is started to drive the rotating rod (5) to rotate, so that the stirring assembly (6) starts to rotate, and the flow groove (603) and the guide hole (604) on the stirring blade (602) help the liquid to mix and flow better, thereby realizing vertical stirring; S2: When the rotating rod (5) rotates, it drives the driving assembly (7) to rotate synchronously. The connecting plate (701) drives the driven gear (902) and the rotating shaft (901) to rotate through the meshing of the inner gear ring (702) and the driven gear (902), so that the side rotating blade (903) starts to rotate to achieve horizontal stirring. The telescopic motor (1901) is started to drive the screw rod (1902) to rotate forward and reverse repeatedly, so that the moving plate (1903) drives the rotating rod (5) to move back and forth repeatedly, and the limiting structure (20) assists the rotating rod (5) and the stirring motor located at one end of the upper connecting pipe (3) to move, so as to more fully stir the fracturing fluid; S3: After the stirring is completed, the discharge pump (16) is started to extract the fracturing fluid in the stirring tank (2) through the discharge pipe (15), and then the fracturing fluid is discharged into the oil and gas well through the discharge pipe (17) to carry out the work.

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