Fracturing apparatus for supplementing formation energy of a tight oil reservoir and methods of use

Abstract

The application discloses a fracturing device for supplementing formation energy of a tight oil reservoir, comprising a mixing unit, wherein the mixing unit is connected with a fracturing manifold through a pressurizing conveying device. The application also discloses a use method of the fracturing device for supplementing formation energy of a tight oil reservoir. The fracturing device for supplementing formation energy of a tight oil reservoir and the use method thereof solve the problem that in the prior art, due to poor compatibility between the particle size distribution, shape, density and surface characteristics of a proppant and fracturing fluid, the proppant is difficult to be uniformly suspended and dispersed in the fracturing fluid.

Description

Technical Field

[0001] This invention belongs to the technical field of natural gas fracturing equipment, specifically relating to a fracturing device for replenishing the formation energy of tight oil reservoirs, and also relating to a method of using the fracturing device for replenishing the formation energy of tight oil reservoirs. Background Technology

[0002] Fracturing units inject fracturing fluid into the formation using high-pressure pumps, causing fractures. Under high pressure, the fracturing fluid forms a network of fractures. These fractures not only increase reservoir permeability but also provide more flow channels for crude oil. Adding proppant to the injected fluid acts as a support within the fractures, preventing them from closing. Simultaneously, the chemical components of the fracturing fluid can improve formation permeability and increase oil and gas well production. First, proppant (such as quartz sand or ceramsite) is mixed with the fracturing fluid. Then, high-pressure water carries the proppant deep into the formation, forming an artificial fracture system that improves fluid flow channels, thereby increasing oil and gas production and formation energy.

[0003] When proppant is mixed with fracturing fluid, the poor compatibility between the proppant's particle size distribution, shape, density, and surface properties (such as roughness and charge) and the fracturing fluid makes it difficult for the proppant to be uniformly suspended and dispersed in the fracturing fluid. Since conventional mixing equipment usually uses rotary mixing, this often causes the material in the tank to stratify at the bottom and top, thereby reducing the mixing efficiency and affecting the effectiveness of replenishing energy to the tight oil reservoir formation. Summary of the Invention

[0004] The purpose of this invention is to provide a fracturing device for supplementing the formation energy of tight oil reservoirs, which solves the problem in existing fracturing technologies where the proppant is difficult to suspend and disperse uniformly in the fracturing fluid due to poor compatibility between the particle size distribution, shape, density, and surface characteristics of the proppant and the fracturing fluid.

[0005] Another object of the present invention is to provide a method of using a fracturing device to supplement the formation energy of tight oil reservoirs.

[0006] The technical solution adopted in this invention is a fracturing device for replenishing formation energy in tight oil reservoirs, including a mixing unit, which is connected to a fracturing manifold via a pressurization and delivery device.

[0007] The invention is further characterized by: The mixing unit includes a mixing drum, inside which a rotating rod is rotatably mounted. The rotating rod is hollow inside, and one end of the rotating rod passes through the mixing drum and is connected to a power component. The rotating rod is open near the power component. Several guide rods are fixedly mounted on the other end of the rotating rod. These guide rods are hollow inside and communicate with the rotating rod. Each guide rod contains an air supply component, and each guide rod has several air supply pipes at its top, which communicate with the air supply components. Mounting blocks are fixedly mounted on the side walls of each guide rod, and these mounting blocks are fan-shaped. Between several guide rods, several mounting blocks are slidably connected to a flipping plate. Several mounting blocks are vertically rotatably mounted with reciprocating threaded rods on their arc segments. The flipping plate is threadedly connected to the reciprocating threaded rod. Several reciprocating threaded rods are fitted with a second gear at their bottom. A toothed ring is fixedly installed on the inner wall of the mixing barrel along the circumferential direction. Several second gears mesh with the toothed ring. Several top blocks are provided at the bottom of the mixing barrel. Several mounting blocks are slidably connected to several top blocks. Several rolling rods are horizontally fixed to the inner wall of the mixing barrel along the circumferential direction. The other end of several rolling rods is fixedly connected to a bearing, which is fitted on the outer wall of the rotating rod.

[0008] Several guide rods are arranged in a circle, and one end of each guide rod is fixedly connected to a rotating rod.

[0009] The flip plate is made of elastic material and has several filter holes.

[0010] The power assembly includes a drive motor, which is fixedly installed on the top of the mixing tank. A drive wheel is sleeved on the output shaft of the drive motor, and a driven wheel is also included. The driven wheel is sleeved on the outer wall of the rotating rod, and the drive wheel and the driven wheel are connected by a belt.

[0011] The air supply assembly includes several top pressure plates, which are slidably installed on the inner walls of several guide rods. Several top pressure rods arranged in a row are fixedly connected to the bottom of the top pressure plates. The top pressure rods all pass through the guide rods and are slidably connected to the guide rods. Several air bladders are provided at the top of the top pressure plates. The air bladders are fixedly installed inside the guide rods and are connected to several air supply pipes. Each air supply pipe is equipped with a one-way valve. Top pressure springs are fixedly connected to the top of the top pressure plates between the air bladders. Ball joints are rotatably installed inside each air bladder. Air vents are opened in the ball joints. Cross valves are provided inside the air vents. A first baffle plate is fixedly installed at the port of the air vent near the inside of the air bladder. A second baffle plate is fixedly installed inside the air bladder. Both the first and second baffle plates are semi-circular. A first gear is fixedly installed on the outer wall of the ball joint away from the air bladder. A toothed plate is fixedly installed at the top of the top pressure plate. The first gear meshes with the toothed plate.

[0012] Several top blocks are semi-cylindrical in shape, and are arranged in concentric circles. Several top pressure rods are arranged one-to-one on the circumference of the concentric circles where the top blocks are distributed.

[0013] Another technical solution adopted in this invention is a method for using a fracturing device to replenish formation energy in tight oil reservoirs, comprising the following steps: S1. Place the fracturing fluid and proppant into the mixing tank, and start the drive motor to control the rotary rod to mix the fracturing fluid and proppant; S2. The rotating rod drives the guide rod to rotate, and the top pressure rod drives the top pressure plate to slide up inside the guide rod under the action of the top block, pressing the air bag and spraying the gas out through the air delivery pipe. S3. The rotating rod drives the mounting block to rotate, and the second gear set at the bottom of the reciprocating threaded rod rotates under the action of the gear ring, causing the flipping plate to slide and cooperate with the crushing rod to crush the clumps.

[0014] The beneficial effects of this invention are: The fracturing device and its method for supplementing tight oil reservoir formation energy provided by this invention, through the start of the drive motor, drives the rotating rod to rotate. At this time, the top pressure rod extending from the bottom of the guide rod, under the pressure of the top block, can drive the top pressure plate to slide upward inside the guide rod, squeezing the gas bag, so that the gas inside is discharged into the interior of the mixing tank through the gas delivery pipe, forming a large number of small bubbles. These small bubbles will drive the surrounding liquid phase to generate rotation and shear force during the rising process, making the mixing more uniform. When the guide rod is driven to rotate by the rotating rod, the mounting block will be driven to rotate in the same direction at the same time. At this time, the second gear at the bottom of the mounting block will engage with the toothed ring inside the mixing tank, which can drive the reciprocating threaded rod to rotate, causing the flipping plate to slide up and down on the outer wall of the reciprocating threaded rod. When the flipping plate inside the mounting block slides upward, it can push the liquid at the bottom upward, further improving the mixing efficiency. Through the downward movement of the flipping plate, the liquid will undergo local flow and deformation due to compression, improving the flow of the liquid and further improving the mixing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the fracturing device for supplementing formation energy in tight oil reservoirs according to the present invention; Figure 2 This is a cross-sectional view of the mixing tank of the present invention; Figure 3 This is the invention Figure 2 A magnified view of part A in the image; Figure 4 This is the invention Figure 2 A magnified view of part B in the image; Figure 5 This is a connection diagram of the air delivery assembly of the present invention; Figure 6 This is the invention Figure 5 A magnified view of part C.

[0016] In the diagram, 1. Mixing tank; 2. Fracturing manifold; 3. Rotating rod; 4. Drive motor; 5. Driving wheel; 6. Driven wheel; 7. Guide rod; 8. Mounting block; 9. Tilting plate; 10. Compactor rod; 11. Reciprocating threaded rod; 12. Top pressure rod; 13. Top pressure plate; 14. Gear plate; 15. First gear; 16. Airbag; 17. Air supply pipe; 18. Top pressure spring; 19. Second gear; 20. Gear ring; 21. Top block; 22. Ball joint; 23. Cross valve disc; 24. First baffle plate; 25. Second baffle plate; 26. Vent hole. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] The fracturing device for supplementing formation energy in tight oil reservoirs provided by this invention, such as... Figure 1 As shown, the system includes a mixing unit, which is connected to the fracturing manifold 2 via a pressurized delivery device. After the fracturing fluid and proppant are properly proportioned, they are delivered into the fracturing manifold 2 via the pressurized delivery device and injected into the formation via a high-pressure pump. When the bottom hole pressure exceeds the formation fracturing pressure, fractures will form in the formation rock. These fractures provide additional flow channels for oil and gas, allowing previously difficult-to-flow oil and gas to flow more easily into the wellbore, further improving oil extraction efficiency. Figure 2As shown, the mixing unit includes a mixing tank 1 for mixing fracturing fluid and proppant. A rotating rod 3 is rotatably mounted inside the mixing tank 1. The rotating rod 3 is hollow inside. One end of the rotating rod 3 passes through the mixing tank 1 and is connected to a power assembly. The power assembly controls the rotation of the rotating rod 3. Simultaneously, a tilting plate 9 slides upwards from the bottom of the mixing tank 1, pushing the settled liquid upwards to further improve mixing efficiency. As the tilting plate 9 slides down, the water body undergoes localized flow and deformation due to compression, improving liquid flow and mixing efficiency. The rotating rod 3 is open near the power assembly. Several guide rods 7 are fixedly mounted at the other end of the rotating rod 3. These guide rods 7 are hollow inside and all communicate with the rotating rod 3. Each guide rod 7 has an air supply assembly inside, and each guide rod 7 has several air supply components at its top. A gas delivery pipe 17 is connected to a gas delivery assembly, which is used to transport the gas inside the guide rod 7 to the inside of the mixing tank 1. The gas rises, causing the material stuck at the bottom to float to the top. External gas can enter the inside of the guide rod 7 through the rotating rod 3 and finally be discharged through the gas delivery pipe 17. During the stirring process, the gas enters the mixing tank 1 from the bottom and forms a large number of small bubbles in the liquid. These small bubbles will cause the surrounding liquid phase to rotate and shear as they rise, making the stirring more uniform. The gas delivery assembly can discharge the gas through the gas delivery pipe 17 and form bubbles inside the mixing tank 1. Mounting blocks 8 are fixedly installed on the side walls of the guide rods 7. The mounting blocks 8 are fan-shaped and installed between the guide rods 7. The mounting blocks 8 are slidably connected to the inside of the mounting blocks 8. Figure 3As shown, several mounting blocks 8 are vertically rotatably mounted with reciprocating threaded rods 11 on their arc segments. A flipping plate 9 is threadedly connected to the reciprocating threaded rods 11. A second gear 19 is fitted onto the bottom of each of the reciprocating threaded rods 11. A gear ring 20 is fixedly mounted circumferentially on the inner wall of the mixing drum 1, and the second gears 19 mesh with the gear ring 20. When the guide rod 7 is driven to rotate by the rotating rod 3, it simultaneously drives the mounting blocks 8 to rotate in the same direction. At this time, the second gear 19 at the bottom of the mounting block 8 will engage with the gear ring 20 inside the mixing drum 1. The downward movement of the rotating screw rod 11 causes the flapping plate 9 to slide up and down on the outer wall of the screw rod 11. When the flapping plate 9, located inside the mounting block 8, slides upward, it can push the liquid at the bottom upward, further improving the mixing efficiency. As the flapping plate 9 slides down, the liquid will undergo local flow and deformation due to compression, improving the flow of the liquid and further improving the mixing efficiency. The bottom of the mixing tank 1 is provided with several top blocks 21, and several mounting blocks 8 are slidably connected to several top blocks 21 for mixing. Several rolling rods 10 are horizontally fixed to the inner wall of barrel 1 along the circumferential direction. A bearing is fixed to the other end of each rolling rod 10, and the bearing is sleeved on the outer wall of the rotating rod 3. Several guide rods 7 are distributed circumferentially, and one end of each guide rod 7 is fixed to the rotating rod 3. The tilting plate 9 is made of elastic material and has several filter holes. When the tilting plate 9 slides upwards, larger clumps or particles can be filtered through the filter holes and left above the tilting plate 9 until the top of the tilting plate 9 meets the rolling rods 10. When the bottom end is in contact with the rotating rod 3, the rotating rod 3, while driving the mounting block 8 to rotate, can rub and crush the particles or clumps on the turning plate 9, further reducing the problem of uneven mixing in the mixing tank 1, and at the same time improving the effect of replenishing the formation energy of the tight oil reservoir; the power component includes a drive motor 4, which is fixedly installed at the top of the mixing tank 1. The output shaft of the drive motor 4 is fitted with a drive wheel 5, and it also includes a driven wheel 6, which is fitted on the outer wall of the rotating rod 3. The drive wheel 5 and the driven wheel 6 are connected by a belt. Figure 4 As shown, the air supply assembly includes several top pressure plates 13, which are slidably installed on the inner walls of several guide rods 7. Several top pressure rods 12 arranged in a row are fixedly connected to the bottom ends of the top pressure plates 13. Each top pressure rod 12 passes through one of the guide rods 7 and is slidably connected to the guide rod 7. Figure 5As shown, the top of the pressure plate 13 is provided with several air bladders 16, which are all fixedly installed inside the guide rod 7. Each air bladder 16 is connected to a corresponding air delivery pipe 17. Each air delivery pipe 17 is equipped with a one-way valve, which can prevent the liquid in the mixing tank 1 from entering the interior of the guide rod 7 through the air delivery pipe 17. By controlling the pressure plate 13 to slide upward inside the guide rod 7, the air bladders 16 can be pressed down, causing them to deform. The gas stored inside can then be delivered through the air delivery pipe. Pipe 17 is inserted into the mixing tank 1; several airbags 16 are each fixed to the top of the pressure plate 13 with a pressure spring 18. The pressure springs 18 maintain pressure on the pressure plate 13, keeping it at the bottom of the guide rod 7. When the pressure plate 13 slides upward and squeezes the airbags 16, causing them to deform, the pressure springs 18 also deform. By releasing elastic potential energy through the pressure springs 18, the pressure plate 13 is controlled to slide downward. The airbags 16, no longer squeezed, also release elastic potential energy to reset and re-inhale the gas; Figure 6 As shown, each of the several airbags 16 has a ball joint 22 rotatably mounted inside. Each ball joint 22 has a vent hole 26, and a cross valve 23 is installed inside the vent hole 26. A first baffle plate 24 is fixedly installed at the port of the vent hole 26 near the inside of the airbag 16. A second baffle plate 25 is fixedly installed inside the airbag 16. Both the first baffle plate 24 and the second baffle plate 25 are semi-circular. A first gear 15 is fixedly installed on the outer wall of the end of the ball joint 22 away from the airbag 16. The top of the pressure plate 13... A toothed plate 14 is fixedly installed, and a first gear 15 meshes with the toothed plate 14. A cross valve 23 can block the vent hole 26. When the airbag 16 is compressed, the gas inside the airbag 16 is squeezed out through the air delivery pipe 17. When the airbag 16 returns to its original position, the gas outside the airbag 16 can be deformed by pressing against the cross valve 23 and enter the interior of the airbag 16, completing inflation. When both the first baffle plate 24 and the second baffle plate 25 can block half of the vent hole 26, therefore, when the first... When the baffle plate 24 and the second baffle plate 25 are aligned vertically, the vent 26 can be blocked, reducing the amount of gas passing through it. Therefore, the gas inside the airbag 16 cannot easily escape through the vent 26, and the gas outside the airbag 16 cannot easily enter it through the vent 26. This ensures that when the airbag 16 is compressed, gas can still be released through the air delivery pipe 17. When the top pressure plate 13 drives the toothed plate 14 to slide upwards and compress the airbag 16, it will drive the first gear 15 to rotate. This causes the first blocking plate 24 inside the ball joint 22 to rotate and, together with the second blocking plate 25, to block the vent 26. When the top pressure plate 13 is located at the bottom of the inside of the guide rod 7, the positions of the first blocking plate 24 and the second blocking plate 25 correspond, and the blockage of the vent 26 can be released. Several top blocks 21 are all semi-cylindrical and are arranged in concentric circles. Several top pressure rods 12 are arranged one-to-one on the concentric circles of the top blocks 21.

[0019] The fracturing device for supplementing tight oil reservoir formation energy provided by the present invention works as follows: by starting the drive motor 4, the drive wheel 5 can be driven to rotate, and under the action of the belt, the driven wheel 6 can be driven to rotate, thus driving the rotating rod 3 to rotate, and at the same time causing the guide rod 7 to rotate. At this time, the top pressure rod 12 extending from the bottom of the guide rod 7, under the pressure of the top block 21, can drive the top pressure plate 13 to slide upward inside the guide rod 7, squeezing the air bag 16, so that the gas inside it is discharged into the interior of the mixing tank 1 through the air delivery pipe 17, and forming a large number of small bubbles. During the rising process, these small bubbles will drive the surrounding liquid phase to generate rotation and shear force, making the mixing more uniform. When the guide rod 7 is rotated by the rotating rod 3, the mounting block 8 will rotate in the same direction. At this time, the second gear 19 at the bottom of the mounting block 8 will cooperate with the toothed ring 20 inside the mixing barrel 1, which can drive the reciprocating threaded rod 11 to rotate, so that the flipping plate 9 slides up and down on the outer wall of the reciprocating threaded rod 11. When the flipping plate 9 inside the mounting block 8 slides upward, it can push the liquid at the bottom upward, further improving the mixing efficiency. As the flipping plate 9 slides down, the liquid will undergo local flow and deformation due to compression, improving the flow of the liquid and further improving the mixing efficiency. Example 1 The fracturing device for supplementing tight oil reservoir formation energy proposed in this embodiment, such as... Figure 1 As shown, it includes a mixing unit, which is connected to a fracturing manifold 2 via a pressurized conveying device.

[0020] Example 2 The fracturing device for supplementing tight oil reservoir formation energy proposed in this embodiment, such as... Figure 1 As shown, it includes a mixing unit, which is connected to a fracturing manifold 2 via a pressurized conveying device. Figure 2 As shown, the mixing unit includes a mixing tank 1. A rotating rod 3 is rotatably mounted inside the mixing tank 1. The rotating rod 3 is hollow inside. One end of the rotating rod 3 passes through the mixing tank 1 and is connected to a power component. The rotating rod 3 is open near the power component. Several guide rods 7 are fixedly mounted on the other end of the rotating rod 3. Each guide rod 7 is hollow inside and connected to the rotating rod 3. Each guide rod 7 has an air supply component inside. Several air supply pipes 17 are located at the top of each guide rod 7 and are connected to the air supply pipes 17. Mounting blocks 8 are fixedly mounted on the side walls of each guide rod 7. Each mounting block 8 is fan-shaped and is installed between the guide rods 7. A flipping plate 9 is slidably connected inside each mounting block 8. Figure 3As shown, several mounting blocks 8 are vertically rotatably mounted with reciprocating threaded rods 11 on their arc segments. The flipping plate 9 is threadedly connected to the reciprocating threaded rods 11. The bottom of several reciprocating threaded rods 11 is fitted with a second gear 19. The inner wall of the mixing barrel 1 is fixedly mounted with a toothed ring 20 along the circumferential direction. Several second gears 19 mesh with the toothed ring 20. The bottom of the mixing barrel 1 is provided with several top blocks 21. Several mounting blocks 8 are slidably connected to several top blocks 21. Several rolling rods 10 are horizontally fixed to the inner wall of the mixing barrel 1 along the circumferential direction. The other end of several rolling rods 10 is fixedly connected with a bearing. The bearing is fitted on the outer wall of the rotating rod 3.

[0021] Example 3 The fracturing device for supplementing tight oil reservoir formation energy proposed in this embodiment, such as... Figure 1 As shown, it includes a mixing unit, which is connected to a fracturing manifold 2 via a pressurized conveying device. Figure 2 As shown, the mixing unit includes a mixing tank 1. A rotating rod 3 is rotatably mounted inside the mixing tank 1. The rotating rod 3 is hollow inside. One end of the rotating rod 3 passes through the mixing tank 1 and is connected to a power component. The rotating rod 3 is open near the power component. Several guide rods 7 are fixedly mounted on the other end of the rotating rod 3. Each guide rod 7 is hollow inside and connected to the rotating rod 3. Each guide rod 7 has an air supply component inside. Several air supply pipes 17 are located at the top of each guide rod 7 and are connected to the air supply pipes 17. Mounting blocks 8 are fixedly mounted on the side walls of each guide rod 7. Each mounting block 8 is fan-shaped and is installed between the guide rods 7. A flipping plate 9 is slidably connected inside each mounting block 8. Figure 3 As shown, several mounting blocks 8 are vertically rotatably mounted with reciprocating threaded rods 11 on their arc segments. A flipping plate 9 is threadedly connected to the reciprocating threaded rods 11. A second gear 19 is fitted onto the bottom of each of the reciprocating threaded rods 11. A gear ring 20 is fixedly mounted on the inner wall of the mixing drum 1 along the circumferential direction. Several second gears 19 mesh with the gear ring 20. Several top blocks 21 are provided at the bottom of the mixing drum 1. Several mounting blocks 8 are slidably connected to several top blocks 21. Several rolling rods 10 are horizontally fixed to the inner wall of the mixing drum 1 along the circumferential direction. Several rolling rods 10 are fixedly connected to bearings at their other ends, and the bearings are sleeved on the outer wall of the rotating rod 3; several guide rods 7 are distributed in a circle, and one end of each guide rod 7 is fixedly connected to the rotating rod 3; the flipping plate 9 is made of elastic material and has several filter holes; the power assembly includes a drive motor 4, which is fixedly installed on the top of the mixing tank 1. The output shaft of the drive motor 4 is sleeved with a drive wheel 5, and also includes a driven wheel 6, which is sleeved on the outer wall of the rotating rod 3. The drive wheel 5 and the driven wheel 6 are connected by a belt.

[0022] Example 4 The fracturing device for supplementing tight oil reservoir formation energy proposed in this embodiment, such as... Figure 1 As shown, it includes a mixing unit, which is connected to a fracturing manifold 2 via a pressurized conveying device. Figure 2 As shown, the mixing unit includes a mixing tank 1. A rotating rod 3 is rotatably mounted inside the mixing tank 1. The rotating rod 3 is hollow inside. One end of the rotating rod 3 passes through the mixing tank 1 and is connected to a power component. The rotating rod 3 is open near the power component. Several guide rods 7 are fixedly mounted on the other end of the rotating rod 3. Each guide rod 7 is hollow inside and connected to the rotating rod 3. Each guide rod 7 has an air supply component inside. Several air supply pipes 17 are located at the top of each guide rod 7 and are connected to the air supply pipes 17. Mounting blocks 8 are fixedly mounted on the side walls of each guide rod 7. Each mounting block 8 is fan-shaped and is installed between the guide rods 7. A flipping plate 9 is slidably connected inside each mounting block 8. Figure 3 As shown, several mounting blocks 8 are vertically rotatably mounted with reciprocating threaded rods 11 on their arc segments. A flipping plate 9 is threadedly connected to the reciprocating threaded rods 11. A second gear 19 is fitted onto the bottom of each of the reciprocating threaded rods 11. A gear ring 20 is fixedly mounted on the inner wall of the mixing drum 1 along the circumferential direction. Several second gears 19 mesh with the gear ring 20. Several top blocks 21 are provided at the bottom of the mixing drum 1. Several mounting blocks 8 are slidably connected to several top blocks 21. Several rolling rods 10 are horizontally fixed to the inner wall of the mixing drum 1 along the circumferential direction. Several rolling rods 10 have bearings fixedly connected to their other ends, and the bearings are sleeved on the outer wall of the rotating rod 3; several guide rods 7 are distributed circumferentially, and one end of each guide rod 7 is fixedly connected to the rotating rod 3; the flipping plate 9 is made of elastic material and has several filter holes; the power assembly includes a drive motor 4, which is fixedly installed at the top of the mixing tank 1. The output shaft of the drive motor 4 is sleeved with a drive wheel 5, and it also includes a driven wheel 6, which is sleeved on the outer wall of the rotating rod 3. The drive wheel 5 and the driven wheel 6 are connected by a belt. Figure 4 As shown, the air supply assembly includes several top pressure plates 13, which are slidably installed on the inner walls of several guide rods 7. Several top pressure rods 12 arranged in a row are fixedly connected to the bottom ends of the top pressure plates 13. Each top pressure rod 12 passes through one of the guide rods 7 and is slidably connected to the guide rod 7. Figure 5 As shown, the top of the pressure plate 13 is provided with several airbags 16, which are all fixedly installed inside the guide rod 7. Each airbag 16 is connected to a corresponding air delivery pipe 17, and each air delivery pipe 17 is equipped with a one-way valve. Each airbag 16 is connected to a pressure spring 18 at the top of the pressure plate 13. Figure 6As shown, a ball joint 22 is rotatably installed inside several airbags 16. A vent hole 26 is opened inside the ball joint 22. A cross valve 23 is provided inside the vent hole 26. A first baffle plate 24 is fixedly installed at the port of the vent hole 26 near the inside of the airbag 16. A second baffle plate 25 is fixedly installed inside the airbag 16. Both the first baffle plate 24 and the second baffle plate 25 are semi-circular. A first gear 15 is fixedly installed on the outer wall of the end of the ball joint 22 away from the airbag 16. A toothed plate 14 is fixedly installed on the top of the pressure plate 13. The first gear 15 meshes with the toothed plate 14.

[0023] Example 5 The fracturing device for supplementing tight oil reservoir formation energy proposed in this embodiment, such as... Figure 1 As shown, it includes a mixing unit, which is connected to a fracturing manifold 2 via a pressurized conveying device. Figure 2 As shown, the mixing unit includes a mixing tank 1. A rotating rod 3 is rotatably mounted inside the mixing tank 1. The rotating rod 3 is hollow inside. One end of the rotating rod 3 passes through the mixing tank 1 and is connected to a power component. The rotating rod 3 is open near the power component. Several guide rods 7 are fixedly mounted on the other end of the rotating rod 3. Each guide rod 7 is hollow inside and connected to the rotating rod 3. Each guide rod 7 has an air supply component inside. Several air supply pipes 17 are located at the top of each guide rod 7 and are connected to the air supply pipes 17. Mounting blocks 8 are fixedly mounted on the side walls of each guide rod 7. Each mounting block 8 is fan-shaped and is installed between the guide rods 7. A flipping plate 9 is slidably connected inside each mounting block 8. Figure 3 As shown, several mounting blocks 8 are vertically rotatably mounted with reciprocating threaded rods 11 on their arc segments. A flipping plate 9 is threadedly connected to the reciprocating threaded rods 11. A second gear 19 is fitted onto the bottom of each of the reciprocating threaded rods 11. A gear ring 20 is fixedly mounted on the inner wall of the mixing drum 1 along the circumferential direction. Several second gears 19 mesh with the gear ring 20. Several top blocks 21 are provided at the bottom of the mixing drum 1. Several mounting blocks 8 are slidably connected to several top blocks 21. Several rolling rods 10 are horizontally fixed to the inner wall of the mixing drum 1 along the circumferential direction. Several rolling rods 10 have bearings fixedly connected to their other ends, and the bearings are sleeved on the outer wall of the rotating rod 3; several guide rods 7 are distributed circumferentially, and one end of each guide rod 7 is fixedly connected to the rotating rod 3; the flipping plate 9 is made of elastic material and has several filter holes; the power assembly includes a drive motor 4, which is fixedly installed at the top of the mixing tank 1. The output shaft of the drive motor 4 is sleeved with a drive wheel 5, and it also includes a driven wheel 6, which is sleeved on the outer wall of the rotating rod 3. The drive wheel 5 and the driven wheel 6 are connected by a belt. Figure 4As shown, the air supply assembly includes several top pressure plates 13, which are slidably installed on the inner walls of several guide rods 7. Several top pressure rods 12 arranged in a row are fixedly connected to the bottom ends of the top pressure plates 13. Each top pressure rod 12 passes through one of the guide rods 7 and is slidably connected to the guide rod 7. Figure 5 As shown, the top of the pressure plate 13 is provided with several airbags 16, which are all fixedly installed inside the guide rod 7. Each airbag 16 is connected to a corresponding air delivery pipe 17, and each air delivery pipe 17 is equipped with a one-way valve. Each airbag 16 is connected to a pressure spring 18 at the top of the pressure plate 13. Figure 6 As shown, each of the several airbags 16 has a rotatable ball joint 22 inside. The ball joint 22 has a vent hole 26 inside. The vent hole 26 has a cross valve 23 inside. A first baffle plate 24 is fixedly installed at the port of the vent hole 26 near the inside of the airbag 16. A second baffle plate 25 is fixedly installed inside the airbag 16. Both the first baffle plate 24 and the second baffle plate 25 are semi-circular. A first gear 15 is fixedly installed on the outer wall of the end of the ball joint 22 away from the airbag 16. A toothed plate 14 is fixedly installed at the top of the top pressure plate 13. The first gear 15 meshes with the toothed plate 14. Each of the several top blocks 21 is semi-cylindrical and arranged in concentric circles. Several top pressure rods 12 are arranged one-to-one on the circumference of the concentric circles of the several top blocks 21.

[0024] Example 6 The method for using the fracturing device to supplement the formation energy of tight oil reservoirs proposed in this embodiment includes the following steps: S1. Place the fracturing fluid and proppant into the mixing tank, and start the drive motor to control the rotary rod to mix the fracturing fluid and proppant; S2. The rotating rod drives the guide rod to rotate, and the top pressure rod drives the top pressure plate to slide up inside the guide rod under the action of the top block, pressing the air bag and spraying the gas out through the air delivery pipe. S3. The rotating rod drives the mounting block to rotate, and the second gear set at the bottom of the reciprocating threaded rod rotates under the action of the gear ring, causing the flipping plate to slide and cooperate with the crushing rod to crush the clumps.

Claims

1. A fracturing device for replenishing formation energy in tight oil reservoirs, characterized in that, It includes a mixing unit, which is connected to a fracturing manifold (2) via a pressurized conveying device.

2. The fracturing device for replenishing tight oil reservoir formation energy according to claim 1, characterized in that, The mixing unit includes a mixing tank (1), inside which a rotating rod (3) is rotatably installed. The rotating rod (3) is hollow inside. One end of the rotating rod (3) passes through the mixing tank (1) and is connected to a power component. The rotating rod (3) is open near the power component. The other end of the rotating rod (3) is fixedly installed with several guide rods (7). The guide rods (7) are hollow inside and connected to the rotating rod (3). Each guide rod (7) has an air supply component inside. Each guide rod (7) has several air supply pipes (17) at its top. The air supply components are connected to the air supply pipes (17). Each guide rod (7) has a mounting block (8) fixedly installed on its side wall. Each mounting block (8) is fan-shaped and is mounted on several... Between the guide rods (7), a flipping plate (9) is slidably connected inside several mounting blocks (8). A reciprocating threaded rod (11) is vertically rotatably mounted on the arc segment of several mounting blocks (8). The flipping plate (9) is threadedly connected to the reciprocating threaded rod (11). A second gear (19) is sleeved at the bottom of several reciprocating threaded rods (11). A toothed ring (20) is fixedly installed on the inner wall of the mixing barrel (1) along the circumferential direction. Several second gears (19) mesh with the toothed ring (20). Several top blocks (21) are provided at the bottom of the mixing barrel (1). Several mounting blocks (8) are slidably connected to several top blocks (21). Several rolling rods (10) are horizontally fixed on the inner wall of the mixing barrel (1) along the circumferential direction. A bearing is fixedly connected to the other end of several rolling rods (10). The bearing is sleeved on the outer wall of the rotating rod (3).

3. The fracturing device for replenishing tight oil reservoir formation energy according to claim 2, characterized in that, Several of the guide rods (7) are arranged in a circle, and one end of each of the guide rods (7) is fixedly connected to the rotating rod (3).

4. The fracturing device for replenishing tight oil reservoir formation energy according to claim 3, characterized in that, The flip plate (9) is made of elastic material and has several filter holes.

5. The fracturing device for replenishing tight oil reservoir formation energy according to claim 4, characterized in that, The power assembly includes a drive motor (4), which is fixedly installed on the top of the mixing tank (1). The output shaft of the drive motor (4) is fitted with a drive wheel (5) and a driven wheel (6). The driven wheel (6) is fitted on the outer wall of the rotating rod (3). The drive wheel (5) and the driven wheel (6) are connected by a belt.

6. The fracturing device for replenishing tight oil reservoir formation energy according to claim 5, characterized in that, The air supply assembly includes several top pressure plates (13), which are slidably installed on the inner walls of several guide rods (7) in a corresponding manner. Several top pressure rods (12) arranged in a row are fixedly connected to the bottom end of each top pressure plate (13). Each top pressure rod (12) penetrates the guide rod (7) and is slidably connected to it. Several air bladders (16) are provided at the top of each top pressure plate (13), and are fixedly installed inside the guide rod (7). Each air bladder (16) is connected to one of the air supply pipes (17) in a corresponding manner. Each air supply pipe (17) is equipped with a one-way valve. The air bladders (16) are connected to each other at the top pressure plate (13). 13) Each of the top ends is fixedly connected to a top pressure spring (18), and each of the several airbags (16) is rotatably installed with a ball joint (22). The ball joint (22) is provided with a vent hole (26), and the vent hole (26) is provided with a cross valve (23). The port of the vent hole (26) near the inside of the airbag (16) is fixedly installed with a first baffle plate (24), and the airbag (16) is fixedly installed with a second baffle plate (25). The first baffle plate (24) and the second baffle plate (25) are both set as semi-circles. The outer wall of the ball joint (22) away from the airbag (16) is fixedly installed with a first gear (15), and the top of the top pressure plate (13) is fixedly installed with a toothed plate (14). The first gear (15) meshes with the toothed plate (14).

7. The fracturing device for replenishing tight oil reservoir formation energy according to claim 6, characterized in that, The top blocks (21) are all semi-cylindrical in shape, and the top blocks (21) are arranged in concentric circles. The top pressure rods (12) are arranged one-to-one on the circumference of the concentric circles distributed among the top blocks (21).

8. A method for using a fracturing device to replenish formation energy in tight oil reservoirs, characterized in that, Using the fracturing apparatus for replenishing tight oil reservoir formation energy as described in claim 7 includes the following steps: S1. Place the fracturing fluid and proppant into the mixing tank, and start the drive motor to control the rotary rod to mix the fracturing fluid and proppant; S2. The rotating rod drives the guide rod to rotate, and the top pressure rod drives the top pressure plate to slide up inside the guide rod under the action of the top block, pressing the air bag and spraying the gas out through the air delivery pipe. S3. The rotating rod drives the mounting block to rotate, and the second gear set at the bottom of the reciprocating threaded rod rotates under the action of the gear ring, causing the flipping plate to slide and cooperate with the crushing rod to crush the clumps.

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