An alternating temporary plugging material addition device and process

Abstract

This invention belongs to the field of oil and gas exploration and development technology, specifically providing an alternating temporary plugging material addition device and process method, including a fracturing pipeline, an addition device one, and an addition device two. The addition device one includes a storage bin one, a feeding pipeline one, a conveying device one, an overflow pipeline one, an injection pipeline one, and a replenishment pipeline one. The addition device two includes a storage bin two, a feeding pipeline two, a conveying device two, an overflow pipeline two, an injection pipeline two, and a replenishment pipeline two. This invention solves the problems of existing high-pressure addition devices, such as small volume, complex structure, high-pressure injury, high labor intensity, low injection efficiency, and high cost. This invention reduces the risk of high-pressure injury, is simple to operate, quick and efficient, reduces the labor intensity of personnel, has high injection efficiency, low cost, and realizes the high-pressure end addition of large-capacity temporary plugging materials.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas exploration and development technology, specifically relating to an alternating temporary plugging material addition device and process method. Background Technology

[0002] Temporary plugging fracturing can accommodate the diversity and complexity of reservoir fractures, improve reservoir permeability, and enhance production, and is widely used in oil and gas reservoir enhancement operations. There are three main methods for adding temporary plugging materials: The first method involves manual addition via the mixing tank of a sand mixing truck, primarily suitable for granular plugging agents. The addition speed depends on experience, is labor-intensive, requires high operational skills, and poses safety hazards such as high-pressure injuries and falls from heights. It can also cause pump head jamming and pump stalling, leading to operational interruptions. The second method involves connecting a pre-filled temporary plugging material storage pipe to a high-pressure manifold at the rear of the pump truck, primarily suitable for temporary plugging balls. The valve of the bypass manifold is manually opened when injection is needed. This method carries the risk of high-pressure injuries, involves a small total volume, and has uncontrollable addition speed and concentration. The third method involves a dedicated temporary plugging material pumping system within the high-pressure manifold. This system is characterized by its large size and high cost, making it unsuitable for low-cost development strategies.

[0003] Chinese patent document CN112878976 A discloses a remote-controlled temporary plugging material injection system and its application method. This remote-controlled temporary plugging material injection device includes a plugging agent injection system, a plugging agent storage system, and a pressure sealing system. It is mainly used to inject the plugging agent or plugging ball into a high-pressure manifold, preventing the plugging agent from failing to overcome resistance due to its own weight and thus avoiding its inability to smoothly enter the manifold. This device employs remote control operation, relying on electro-hydraulic power to control the plugging agent injection system and the pressure sealing system, thereby preventing construction personnel from traversing high-pressure areas and ensuring the safety of on-site construction personnel from potential high-pressure leak injuries. This invention enables the continuous injection of temporary plugging agent and temporary plugging balls into the high-pressure manifold without interruption of pumping, significantly improving the continuity of temporary plugging fracturing operations, shortening construction time, and reducing construction costs. However, the device described in this paper still requires a dedicated temporary plugging material pumping system within the high-pressure manifold. This system is characterized by its large size and high cost, making it unsuitable for a low-cost development strategy. Furthermore, when pushing the temporary plugging material from the storage chamber into the high-pressure manifold via a pusher, two problems arise: firstly, the pusher cannot push the material in during extension, prolonging the injection time; secondly, the storage chamber limits the injection capacity for large volumes of temporary plugging material due to its limited space. Finally, as this is a high-pressure device, a pressure-sealing system is required, resulting in a complex structure and high cost.

[0004] To address the issues of high labor intensity, high experience requirements, and potential problems such as high-pressure injury, falls from heights, pump head jamming, and pump stalling when adding sand under low pressure, as well as high-pressure injury, small addition volume, and uncontrollable addition speed and concentration of temporary plugging material in the high-pressure manifold pre-installed side branch pipe, an alternating large-capacity high-pressure addition device and process method for temporary plugging material is proposed. This method enables remote control of automatic addition of various types of temporary plugging materials at the high-pressure end of large capacity. Summary of the Invention

[0005] The purpose of the alternating temporary plugging material addition device and process provided by the present invention is to overcome the problems of small volume, complex structure, high pressure injury, high labor intensity, low injection efficiency and high cost of the existing high pressure addition device.

[0006] To address this, the present invention provides an alternating temporary plugging material addition device, comprising a fracturing pipeline, an addition device one, and an addition device two. The addition device one includes a storage silo one, a feeding pipeline one, a conveying device one, an overflow pipeline one, an injection pipeline one, and a replenishment pipeline one. The conveying device one is connected to one end of the feeding pipeline one, one end of the overflow pipeline one, and one end of the injection pipeline one, respectively. The other ends of the overflow pipeline one and the feeding pipeline one are both connected to the storage silo one. The other ends of the injection pipeline one and the replenishment pipeline one are both connected to the fracturing pipeline. The other end of the replenishment pipeline one is connected to one end of the injection pipeline one.

[0007] The second feeding device includes a second storage silo, a second feeding pipeline, a second conveying device, a second overflow pipeline, a second injection pipeline, and a second replenishment pipeline. The second conveying device is connected to one end of the second feeding pipeline, one end of the second overflow pipeline, and one end of the second injection pipeline. The other ends of the second overflow pipeline and the second feeding pipeline are both connected to the second storage silo. The other ends of the second injection pipeline and one end of the second replenishment pipeline are both connected to the fracturing pipeline. The other end of the second replenishment pipeline is connected to one end of the second injection pipeline.

[0008] Preferably, the bottom surfaces of both storage bin one and storage bin two are inclined surfaces.

[0009] Preferably, a feeding valve is connected to the feeding pipeline, an overflow valve is connected to the overflow pipeline, an injection valve is connected to the injection pipeline, and a replenishment valve is connected to the replenishment pipeline.

[0010] Feeding pipe 2 is equipped with feeding valve 2, overflow pipe 2 is equipped with overflow valve 2, injection pipe 2 is equipped with injection valve 2, and replenishment pipe 2 is equipped with replenishment valve 2.

[0011] Preferably, the feeding valve one, overflow valve one, injection valve one, replenishment valve one, feeding valve two, overflow valve two, injection valve two, and replenishment valve two are all electro-hydraulic rotary valves.

[0012] Preferably, the conveying device includes a motor, a conveying pipe, and an auger. The conveying pipe is inclined and connected to the auger. One end of the auger passes through the upper end face of the conveying pipe and is connected to the power output end of the motor. An overflow port, an injection port, and a feeding port are sequentially provided on the upper end, the lower end, and the lower end of the conveying pipe. The overflow port is connected to one end of the overflow pipe, the injection port is connected to one end of the injection pipe, and the feeding port is connected to one end of the feeding pipe.

[0013] Preferably, the second conveying device includes a second motor, a second conveying pipe, and a second auger. The second conveying pipe is inclined and the second auger is connected inside the second conveying pipe. One end of the second auger passes through the upper end face of the second conveying pipe and is connected to the power output end of the second motor. The upper end, the lower end, and the lower end of the second conveying pipe are sequentially provided with an overflow port, an injection port, and a feeding port. The overflow port is connected to one end of the overflow pipe, the injection port is connected to one end of the injection pipe, and the feeding port is connected to one end of the feeding pipe.

[0014] Preferably, both motor one and motor two are frequency-modulated motors.

[0015] Preferably, the bottom of the first storage bin is provided with a first recycling port, and the bottom of the second storage bin is provided with a second recycling port.

[0016] Preferably, the storage bin one is provided with a feeding port one on its top, and the storage bin two is provided with a feeding port two on its top.

[0017] A process method based on the aforementioned alternating temporary plugging material addition device includes the following steps:

[0018] 1) When in use, the inlet of the fracturing pipeline is connected to the upstream of the fracturing pipeline, and the outlet of the fracturing pipeline is connected to the downstream of the fracturing pipeline;

[0019] 2) Open injection line 1, injection line 2, replenishment line 1 and replenishment line 2, close overflow line 1, overflow line 2, feeding line 1 and feeding line 2, and test the pressure of the alternating temporary plugging material adding device until it is qualified.

[0020] 3) Close recovery port one and recovery port two, add temporary blocking material into storage bin one from feeding port one, and add temporary blocking material into storage bin two from feeding port two;

[0021] 4) Close injection line 1, injection line 2, replenishment line 1 and replenishment line 2, and carry out fracturing operation with fracturing fluid through the fracturing pipeline;

[0022] 5) When temporary plugging material needs to be added, add material to the adding device 1. Specifically, open the feeding pipe 1 and the overflow pipe 1. The temporary plugging material falls through the feeding pipe 1 to the lower end of the conveying pipe 1. Start the motor 1. The motor 1 drives the auger 1 to rotate, which conveys the temporary plugging material in the lower end of the conveying pipe 1 upward until the temporary plugging material fills the conveying pipe 1. The temporary plugging material overflowing from the conveying pipe 1 returns to the storage bin 1 through the overflow pipe 1.

[0023] 6) The feeding device is used to inject material into the fracturing pipeline. Specifically, the motor, feed line, and overflow line are turned off. The motor, injection line, and replenishment line are turned on. The temporary plugging material in the delivery line is pushed into the fracturing pipeline through the injection line. The fracturing fluid upstream of the fracturing pipeline is replenished into the lower end of the delivery line through the replenishment line. When the temporary plugging material in the delivery line is delivered, the injection line and replenishment line are turned off. Step 5) is repeated to feed material into the feeding device.

[0024] 7) Adding material to the second feeding device: open the second feeding pipe and the second overflow pipe. The temporary blocking material falls through the second feeding pipe to the lower end of the second conveying pipe. Start the second motor to drive the second auger to rotate, and convey the temporary blocking material in the lower end of the second conveying pipe upward until the temporary blocking material fills the second conveying pipe. The temporary blocking material overflowing from the second conveying pipe returns to the second storage bin through the second overflow pipe.

[0025] 8) Injecting material into the fracturing pipeline of the device two: shut down motor two, feed line two and overflow line two, turn on motor two, injection line two and replenishment line two, push the temporary plugging material in delivery line two into the fracturing pipeline through injection line two, and replenish the lower end of delivery line two with fracturing fluid upstream of the fracturing pipeline through replenishment line two. When the temporary plugging material in delivery line two is delivered, shut down injection line two and replenishment line two.

[0026] 9) Repeat step 7) to add material to the second feeding device, and at the same time repeat step 6) to inject material into the fracturing pipeline through the first feeding device; after the first feeding device has finished injecting material into the fracturing pipeline, repeat step 5) to add material to the first feeding device, and at the same time repeat step 8) to inject material into the fracturing pipeline through the second feeding device; complete the injection of all temporary plugging materials in the above cycle.

[0027] The beneficial effects of this invention are:

[0028] 1. The alternating temporary plugging material addition device and process method provided by the present invention includes an addition device one and an addition device two. By using two sets of addition devices to alternately add material, the contradiction of large volume and low pressure is solved, the shortcomings of small volume of existing high pressure addition devices are overcome, and the goal of large-capacity addition of temporary plugging material is achieved.

[0029] 2. The alternating temporary plugging material adding device and process method provided by this invention uses electro-hydraulic plug valves for the feeding valve 1, overflow valve 1, injection valve 1, replenishment valve 1, feeding valve 2, overflow valve 2, injection valve 2, and replenishment valve 2. Electro-hydraulic plug valves have the advantages of large torque, rapid opening and closing, and convenient control. The electro-hydraulic plug valves realize remote control of automatic addition of temporary plugging material, avoiding the high pressure injury risk of direct addition of existing high pressure manifolds. The operation is simple, fast and efficient, and reduces the labor intensity of personnel.

[0030] 3. The alternating temporary plugging material addition device and process method provided by the present invention replenishes the empty volume of the first delivery pipe in a timely manner through the replenishment pipeline one, and replenishes the empty volume of the second delivery pipe in a timely manner through the replenishment pipeline two, so as to ensure the continuous and stable addition of the temporary plugging material and avoid the interference of liquid backflow in the first and second delivery pipes on the delivery of the temporary plugging material. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] Figure 1 This is a front view of the alternating temporary plugging material addition device;

[0033] Figure 2 This is a right view of the structure of the alternating temporary plugging material addition device;

[0034] Figure 3 yes Figure 2 A bottom view of position AA.

[0035] Explanation of reference numerals in the attached diagram: 1. Overflow pipe 1; 2. Overflow pipe 2; 3. Cover plate 1; 4. Cover plate 2; 5. Feed port 1; 6. Feed port 2; 7. Storage bin 1; 8. Storage bin 2; 9. Overflow valve 1; 10. Overflow valve 2; 11. Motor 1; 12. Motor 2; 13. Injection pipe 1; 14. Injection pipe 2; 15. Injection valve 1; 16. Injection valve 2; 17. Feed valve 1; 18. Feed valve 2; 19. Conveying pipe 1; 20. Conveying pipe 2; 21. Screwdriver 1; 22. Screwdriver 2; 23. Recovery port 1; 24. Recovery port 2; 25. Fracturing pipeline; 26. Inlet; 27. Outlet; 28. Makeup pipe 1; 29. ​​Makeup pipe 2; 30. Feed pipe 1; 31. Feed pipe 2; 32. Makeup valve 1; 33. Makeup valve 2. Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer should be followed. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0037] Example 1:

[0038] like Figures 1-3 As shown, an alternating temporary plugging material addition device includes a fracturing pipeline 25, an addition device one, and an addition device two. The addition device one includes a storage bin one 7, a feeding pipeline one 30, a conveying device one, an overflow pipeline one 1, an injection pipeline one 13, and a replenishment pipeline one 28. The conveying device one is connected to one end of the feeding pipeline one 30, one end of the overflow pipeline one 1, and one end of the injection pipeline one 13. The other ends of the overflow pipeline one 1 and the feeding pipeline one 30 are both connected to the storage bin one 7. The other ends of the injection pipeline one 13 and the replenishment pipeline one 28 are both connected to the fracturing pipeline 25. The other end of the replenishment pipeline one 28 is connected to one end of the injection pipeline one 13.

[0039] The second feeding device includes a second storage bin 8, a second feeding pipeline 31, a second conveying device, a second overflow pipeline 2, a second injection pipeline 14, and a second replenishment pipeline 29. The second conveying device is connected to one end of the second feeding pipeline 31, one end of the second overflow pipeline 2, and one end of the second injection pipeline 14. The other ends of the second overflow pipeline 2 and the second feeding pipeline 31 are both connected to the second storage bin 8. The other ends of the second injection pipeline 14 and the second replenishment pipeline 29 are both connected to the fracturing pipeline 25. The other end of the second replenishment pipeline 29 is connected to one end of the second injection pipeline 14.

[0040] The alternating temporary plugging material adding device provided by this invention includes adding device one and adding device two. By using two sets of adding devices to alternately inject material, the contradiction of large volume and low pressure is solved, and the shortcomings of existing high-pressure adding devices with small volume are overcome, achieving the goal of adding large-capacity temporary plugging material. Liquid replenishment pipeline one 28 replenishes the first conveying device in a timely manner, and liquid replenishment pipeline two 29 replenishes the empty volume of the second conveying device in a timely manner, ensuring continuous and stable addition of temporary plugging material and avoiding interference from liquid backflow in the first and second conveying devices. Excess temporary plugging material in the first conveying device is returned to the storage silo one 7 in a timely manner through overflow pipeline one 1, ensuring that the first conveying device is full of temporary plugging material during addition; excess temporary plugging material in the second conveying device is returned to the storage silo two 8 in a timely manner through overflow pipeline two 2, ensuring that the second conveying device is full of temporary plugging material during addition.

[0041] Preferably, the bottom surface of both the storage bin 7 and the storage bin 8 is an inclined surface.

[0042] The inclined surface facilitates the installation of inclined conveyor device 1 below the bottom surface of storage bin 1 7 and inclined conveyor device 2 below the bottom surface of storage bin 2 8, making full use of space and reducing the size of the device.

[0043] Preferably, the storage bin 7 and the storage bin 8 are boxes, each including a top surface, a front surface, a rear surface, a left surface, a right surface, and a bottom surface. The top surface and the bottom surface are horizontally arranged from top to bottom. The top surface and the bottom surface are circumferentially connected to the front surface, the right surface, the rear surface, and the left surface, and the front surface, the rear surface, the left surface, and the right surface are all vertically arranged. The bottom surface is inclined, sloping downward from the upper front corner to the lower rear corner of the box.

[0044] The structure of storage bins 7 and 8 is simple and occupies little space. The inclined surface design prevents the temporary blocking material entering storage bins 7 and 8 from accumulating on the bottom surface, making it easier for the temporary blocking material to enter the injection pipeline.

[0045] Preferably, the storage bin 7 and the storage bin 8 are made of welded steel plates and are arranged side by side. This method is convenient to use and economical.

[0046] Preferably, the storage bin 7 has a feeding port 5 on its top, and the storage bin 8 has a feeding port 6 on its top. Feeding ports 5 and 6 facilitate feeding.

[0047] Preferably, a cover plate 3 is connected to the feeding port 5, and a cover plate 4 is connected to the feeding port 6; the cover plate 3 facilitates opening and closing the feeding port 5, and the cover plate 4 facilitates opening and closing the feeding port 6. Specifically, both the cover plate 3 and the cover plate 4 are caps, and one end of the cap is connected to the upper hinge of the storage bin 7 or the storage bin 8.

[0048] Preferably, a feeding valve 17 is connected to the feeding pipeline 30, an overflow valve 9 is connected to the overflow pipeline 1, an injection valve 15 is connected to the injection pipeline 13, and a replenishment valve 32 is connected to the replenishment pipeline 28.

[0049] Feeding pipe 2 31 is equipped with feeding valve 2 18, overflow pipe 2 2 is equipped with overflow valve 2 10, injection pipe 2 14 is equipped with injection valve 2 16, and replenishment pipe 2 29 is equipped with replenishment valve 2 33.

[0050] Feed valve 17 facilitates the control of the opening and closing of feed line 30; overflow valve 9 facilitates the control of the opening and closing of overflow line 1; injection valve 15 facilitates the control of the opening and closing of injection line 13; replenishment valve 32 facilitates the control of the opening and closing of replenishment line 28; feed valve 18 facilitates the control of the opening and closing of feed line 31; overflow valve 10 facilitates the control of the opening and closing of overflow line 2; injection valve 16 facilitates the control of the opening and closing of injection line 14; and replenishment valve 33 facilitates the control of the opening and closing of replenishment line 29. Specifically, each valve and its corresponding line are connected via unions.

[0051] Preferably, the feeding valve 17, overflow valve 9, injection valve 15, replenishment valve 32, feeding valve 2 18, overflow valve 2 10, injection valve 2 16, and replenishment valve 2 33 are all electro-hydraulic rotary valves.

[0052] Electro-hydraulic stopcock valves have the advantages of high torque, rapid switching, and convenient control. They enable remote control of the automatic addition of temporary plugging materials, avoiding the high-pressure injury risk associated with direct addition of materials to existing high-pressure manifolds. They are easy to operate, quick and efficient, and reduce the labor intensity of personnel.

[0053] Preferably, the conveying device includes a motor 11, a conveying pipe 19, and an auger 21. The conveying pipe 19 is inclined and the auger 21 is connected inside the conveying pipe 19. One end of the auger 21 passes through the upper end face of the conveying pipe 19 and is connected to the power output end of the motor 11. An overflow port 1, an injection port 1, and a feeding port 1 are sequentially opened on the upper end, the lower end, and the lower end of the conveying pipe 19. The overflow port 1 is connected to one end of the overflow pipe 1, the injection port 1 is connected to one end of the injection pipe 13, and the feeding port 1 is connected to one end of the feeding pipe 30.

[0054] Specifically, the conveying pipe 19 is connected to the auger 21, which is in a free clearance fit with the front higher than the rear and installed at an angle to increase the volume of the conveying pipe 19. The auger 21 is a right-handed helical structure with a shaft. A blind plate is welded to the rear end of the conveying pipe 19, and a cover plate is welded to the front end. A round hole is opened in the center of the cover plate, through which the front end of the auger 21 spindle extends and connects to the output shaft of the motor 11. The connection method can be flange, bushing, spline, etc. This conveying device with this structure can smoothly convey the temporary blockage solution during the stirring process, prevent the temporary blockage solution from settling and blocking during the conveying process, and improve the conveying efficiency.

[0055] Preferably, the second conveying device includes a second motor 12, a second conveying pipe 20, and a second auger 22. The second conveying pipe 20 is inclined and the second auger 22 is connected inside the second conveying pipe 20. One end of the second auger 22 passes through the upper end face of the second conveying pipe 20 and is connected to the power output end of the second motor 12. An overflow port 2, an injection port 2, and a feeding port 2 are sequentially opened on the upper end, the lower end, and the lower end of the second conveying pipe 20. The overflow port 2 is connected to one end of the overflow pipe 22, the injection port 2 is connected to one end of the injection pipe 24, and the feeding port 2 is connected to one end of the feeding pipe 21.

[0056] Specifically, the conveying pipe 20 is connected to the auger 22, which is a free clearance fit between the two. The auger is installed at an angle, with the front higher than the rear, which can increase the volume of the conveying pipe 20. The auger 22 is a right-handed helical structure with a shaft. A blind plate is welded to the rear end of the conveying pipe 20, and a cover plate is welded to the front end. A round hole is opened in the center of the cover plate. The front end of the auger 22 spindle extends out of this round hole and connects to the output shaft of the motor 212. The connection method can be flange, bushing, spline, etc. The conveying device 2 with this structure can smoothly convey the temporary blockage solution during the stirring process, prevent the temporary blockage solution from settling and blocking during the conveying process, and improve the conveying efficiency.

[0057] Preferably, both motor 11 and motor 12 are frequency-modulated motors.

[0058] By using a frequency-modulated motor to control the screw speed, the addition rate of the temporary plugging material can be adjusted at any time, effectively controlling the amount of temporary plugging material used and enabling temporary plugging fracturing operations of different scales.

[0059] Preferably, the pitch and tooth height of the spiral are greater than the diameter of the largest temporary plugging ball currently on site by 25mm, so as to allow for the sequential addition of larger diameter temporary plugging balls.

[0060] Preferably, the bottom of the storage bin 7 is provided with a recycling port 23, and the bottom of the storage bin 8 is provided with a recycling port 24.

[0061] After construction is completed, if there is any remaining temporary blocking material in the storage bin or if construction is interrupted for other reasons, the excess temporary blocking material can be recycled through recycling port 1 23 and recycling port 24.

[0062] Preferably, both the first recycling port 23 and the second recycling port 24 are equipped with recycling covers. The recycling covers switch either the first recycling port 23 or the second recycling port 24.

[0063] Preferably, the diameters of the feeding pipeline 30 and the injection pipeline 13 are both larger than the diameter of the replenishment pipeline 28, and the other end of the replenishment pipeline 28 is connected to one end of the feeding pipeline 30; the diameters of the feeding pipeline 31 and the injection pipeline 14 are both larger than the diameter of the replenishment pipeline 29, and the other end of the replenishment pipeline 29 is connected to one end of the feeding pipeline 31; specifically, the replenishment pipeline 28 first runs horizontally to the right, then turns upward to the vertical direction, and then turns horizontal again, connecting to the lower side of the feeding pipeline 30; the replenishment pipeline 29 first runs horizontally to the right, then turns upward to the vertical direction, and then turns horizontal again, connecting to the lower side of the feeding pipeline 31; this improves the efficiency of feeding and injection, thereby improving construction efficiency.

[0064] Specifically, the lower end of the feed line 30 is connected to the replenishment line 28, and the fracturing fluid replenishes the packing fluid at the lower end of the delivery line 19 through the replenishment line 28.

[0065] The lower end of the feed line 2 31 is connected to the replenishment line 2 29, and the fracturing fluid is replenished to the packing material at the lower end of the delivery line 2 20 through the replenishment line 2 29.

[0066] Example 2:

[0067] Based on Example 1, a process method based on the alternating temporary plugging material addition device includes the following steps:

[0068] 1) In use, the inlet 26 of the fracturing pipeline 25 is connected to the upstream of the fracturing pipeline, and the outlet 27 of the fracturing pipeline 25 is connected to the downstream of the fracturing pipeline;

[0069] 2) Open injection line 13, injection line 24, replenishment line 18, and replenishment line 29 (i.e., open injection valve 15, injection valve 26, replenishment valve 132, and replenishment valve 23), close overflow line 1, overflow line 22, feed line 130, and feed line 21 (i.e., close overflow valve 19, overflow valve 20, feed valve 17, and feed valve 218), close the wellhead main valve, and perform a pressure test simultaneously with the surface pipelines. Test the alternating temporary plugging material addition device until it passes the test; after passing the pressure test, proceed with the subsequent steps.

[0070] 3) Close recovery port 1 23 and recovery port 2 24, add temporary blocking material into storage bin 1 7 from feed port 1 5, and add temporary blocking material into storage bin 2 8 from feed port 2 6;

[0071] 4) Close injection line 13, injection line 24, replenishment line 18 and replenishment line 29 (i.e. close injection valve 15, injection valve 26, replenishment valve 132 and replenishment valve 23), and the fracturing fluid is used for fracturing operation through fracturing line 25;

[0072] 5) When temporary plugging material needs to be added, add material to the adding device: open the feeding pipe 30 and the overflow pipe 1 (i.e., remotely open the feeding valve 17 and the overflow valve 9). The temporary plugging material falls through the feeding pipe 30 to the lower end of the conveying pipe 19. Start the motor 11. The motor 11 drives the auger 21 to rotate, and convey the temporary plugging material in the lower end of the conveying pipe 19 upward until the temporary plugging material fills the conveying pipe 19. The temporary plugging material overflowing from the conveying pipe 19 returns to the storage bin 7 through the overflow pipe 1.

[0073] 6) The feeding device injects material into the fracturing pipeline 25. Specifically, the motor 11, the feeding pipeline 30, and the overflow pipeline 1 are turned off. The motor 11, the injection pipeline 13, and the replenishment pipeline 28 are turned on. The temporary plugging material in the delivery pipeline 19 is pushed into the fracturing pipeline 25 through the injection pipeline 13. The fracturing fluid upstream of the fracturing pipeline 25 replenishes the lower end of the delivery pipeline 19 through the replenishment pipeline 28. When the temporary plugging material in the delivery pipeline 19 is delivered, the injection pipeline 13 and the replenishment pipeline 28 are turned off. Step 5) is repeated to feed material into the feeding device.

[0074] 7) Adding material to the second feeding device: open the second feeding pipe 31 and the second overflow pipe 2. The temporary blocking material falls through the second feeding pipe 31 to the lower end of the second conveying pipe 20. Start the second motor 12 to drive the second auger 22 to rotate, and convey the temporary blocking material in the lower end of the second conveying pipe 20 upward until the temporary blocking material fills the second conveying pipe 20. The temporary blocking material overflowing from the second conveying pipe 20 returns to the second storage bin 8 through the second overflow pipe 2.

[0075] 8) Inject material into the fracturing pipeline 25 of the device, specifically: shut down motor 212, feed line 231 and overflow line 22, turn on motor 212, injection line 214 and replenishment line 29, push the temporary plugging material in delivery line 20 into fracturing pipeline 25 through injection line 214, and replenish the lower end of delivery line 20 with fracturing fluid upstream of fracturing pipeline 25 through replenishment line 29. When the temporary plugging material in delivery line 20 is delivered, shut down injection line 214 and replenishment line 29.

[0076] 9) Repeat step 7) to add material into the second feeding device, and at the same time repeat step 6) to inject material into the fracturing pipeline 25 through the first feeding device; after the first feeding device has injected material into the fracturing pipeline 25, repeat step 5) to add material into the first feeding device, and at the same time repeat step 8) to inject material into the fracturing pipeline 25 through the second feeding device; complete the injection of all temporary plugging materials according to the above cycle.

[0077] The opening and closing of the aforementioned valves are all remotely operated, enabling remote control of the automatic addition of temporary plugging material. This avoids the high-pressure injury risks associated with direct addition through existing high-pressure manifolds. The operation is simple, fast, and efficient, reducing the labor intensity of personnel and achieving the goal of adding temporary plugging material at the high-pressure end. By adding high-concentration temporary plugging material through a side branch, the concentration of the added temporary plugging material can be significantly increased, reducing the amount of plugging agent used and lowering costs. The method of alternating feeding and injection through two sets of small-volume delivery pipes solves the contradiction of large volume and low pressure resistance, overcomes the shortcomings of small volume in existing high-pressure addition devices, and features a simple structure, achieving the goal of large-capacity addition of temporary plugging material in a small volume.

[0078] In the description of this invention, it should be understood that if terms such as "front" or "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the invention.

[0079] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. An alternating temporary plugging material adding device, characterized in that: The system includes a fracturing pipeline (25), an infeeding device 1, and an infeeding device 2. The infeeding device 1 includes a storage bin 1 (7), a feed pipeline 1 (30), a conveying device 1, an overflow pipeline 1 (1), an injection pipeline 1 (13), and a replenishment pipeline 1 (28). The conveying device 1 is connected to one end of the feed pipeline 1 (30), one end of the overflow pipeline 1 (1), and one end of the injection pipeline 1 (13). The other ends of the overflow pipeline 1 (1) and the feed pipeline 1 (30) are both connected to the storage bin 1 (7). The other end of the injection pipeline 1 (13) and one end of the replenishment pipeline 1 (28) are both connected to the fracturing pipeline (25). The other end of the replenishment pipeline 1 (28) is connected to the injection pipeline 1 (13). One end; the conveying device includes a motor (11), a conveying pipe (19) and an auger (21). The conveying pipe (19) is inclined and the auger (21) is connected inside the conveying pipe (19). One end of the auger (21) passes through the upper end face of the conveying pipe (19) and is connected to the power output end of the motor (11). An overflow port is opened on the upper end of the conveying pipe (19), an injection port is opened on the lower end of the upper end of the conveying pipe (19), and a feeding port is opened on the lower end of the conveying pipe (19). The overflow port is connected to one end of the overflow pipe (1), the injection port is connected to one end of the injection pipe (13), and the feeding port is connected to one end of the feeding pipe (30). The second feeding device includes a second storage silo (8), a second feeding pipeline (31), a second conveying device, a second overflow pipeline (2), a second injection pipeline (14), and a second replenishment pipeline (29). The second conveying device is connected to one end of the second feeding pipeline (31), one end of the second overflow pipeline (2), and one end of the second injection pipeline (14). The other end of the second overflow pipeline (2) and the other end of the second feeding pipeline (31) are both connected to the second storage silo (8). The other end of the second injection pipeline (14) and one end of the second replenishment pipeline (29) are both connected to the fracturing pipeline (25). The other end of the second replenishment pipeline (29) is connected to one end of the second injection pipeline (14). The second conveying device includes a second motor (12), a second conveying pipeline (20), and a second auger (22). The second conveying pipeline (20) The conveying pipe is inclined and connected to the auger 2 (22). One end of the auger 2 (22) passes through the upper end face of the conveying pipe 2 (20) and is connected to the power output end of the motor 2 (12). The upper end of the conveying pipe 2 (20) is provided with an overflow port 2, the lower end of the conveying pipe 2 (20) is provided with an injection port 2, and the lower end of the conveying pipe 2 (20) is provided with a feeding port 2. The overflow port 2 is connected to one end of the overflow pipe 2 (2), the injection port 2 is connected to one end of the injection pipe 2 (14), and the feeding port 2 is connected to one end of the feeding pipe 2 (31). The auger 1 (21) is a shafted right-handed spiral structure. The auger 2 (22) is a shafted right-handed spiral structure. The pitch and tooth height of the spiral are greater than the diameter of the largest temporary plugging ball at the current site by 25mm.

2. The alternating temporary plugging material addition device as described in claim 1, characterized in that: The bottom surfaces of both storage bin one (7) and storage bin two (8) are inclined surfaces.

3. The alternating temporary plugging material addition device as described in claim 1, characterized in that: A feeding valve (17) is connected to the feeding pipeline (30), an overflow valve (9) is connected to the overflow pipeline (1), an injection valve (15) is connected to the injection pipeline (13), and a replenishment valve (32) is connected to the replenishment pipeline (28). Feeding pipe 2 (31) is equipped with feeding valve 2 (18), overflow pipe 2 (2) is equipped with overflow valve 2 (10), injection pipe 2 (14) is equipped with injection valve 2 (16), and replenishment pipe 2 (29) is equipped with replenishment valve 2 (33).

4. The alternating temporary plugging material addition device as described in claim 3, characterized in that: The feed valve 1 (17), overflow valve 1 (9), injection valve 1 (15), replenishment valve 1 (32), feed valve 2 (18), overflow valve 2 (10), injection valve 2 (16), and replenishment valve 2 (33) are all electro-hydraulic rotary valves.

5. The alternating temporary plugging material addition device as described in claim 1, characterized in that: Both motor one (11) and motor two (12) are frequency-modulated motors.

6. The alternating temporary plugging material addition device as described in claim 1, characterized in that: The bottom of the first storage bin (7) is provided with a first recycling port (23), and the bottom of the second storage bin (8) is provided with a second recycling port (24).

7. The alternating temporary plugging material addition device as described in claim 6, characterized in that: The storage bin 1 (7) has a feeding port 1 (5) on its top, and the storage bin 2 (8) has a feeding port 2 (6) on its top.

8. A process method based on the alternating temporary plugging material addition device according to claim 7, characterized in that: Includes the following steps: 1) When in use, the inlet of the fracturing pipeline (25) is connected to the upstream of the fracturing pipeline, and the outlet of the fracturing pipeline (25) is connected to the downstream of the fracturing pipeline; 2) Open injection line 1 (13), injection line 2 (14), replenishment line 1 (28) and replenishment line 2 (29), close overflow line 1 (1), overflow line 2 (2), feed line 1 (30) and feed line 2 (31), and test the pressure of the alternating temporary plugging material adding device until it is qualified; 3) Close the first (23) and second (24) recycling ports, add temporary blocking material into the first (7) storage bin from the first (5) feeding port, and add temporary blocking material into the second (8) storage bin from the second (6) feeding port; 4) Close injection line one (13), injection line two (14), fluid replenishment line one (28) and fluid replenishment line two (29), and the fracturing fluid is used for fracturing operation through fracturing line (25); 5) When it is necessary to add temporary blocking material, add material into the first adding device. Specifically, open the first adding pipe (30) and the first overflow pipe (1). The temporary blocking material falls down to the lower end of the first conveying pipe (19) through the first adding pipe (30). Start the first motor (11). The first motor (11) drives the first auger (21) to rotate, and conveys the temporary blocking material in the lower end of the first conveying pipe (19) upward until the temporary blocking material fills the first conveying pipe (19). The temporary blocking material overflowing from the first conveying pipe (19) returns to the first storage bin (7) through the first overflow pipe (1). 6) The feeding device injects material into the fracturing pipeline (25). Specifically, the motor (11), feeding pipeline (30) and overflow pipeline (1) are closed. The motor (11), injection pipeline (13) and replenishment pipeline (28) are opened. The temporary plugging material in the delivery pipeline (19) is pushed into the fracturing pipeline (25) through the injection pipeline (13). The fracturing fluid upstream of the fracturing pipeline (25) replenishes the lower end of the delivery pipeline (19) through the replenishment pipeline (28). When the temporary plugging material in the delivery pipeline (19) is delivered, the injection pipeline (13) and replenishment pipeline (28) are closed. Step 5) is repeated to feed material into the feeding device. 7) Add material to the second feeding device. Specifically, open the second feeding pipe (31) and the second overflow pipe (2). The temporary blocking material falls through the second feeding pipe (31) to the lower end of the second conveying pipe (20). Start the second motor (12) to drive the second auger (22) to rotate, and transport the temporary blocking material in the lower end of the second conveying pipe (20) upward until the temporary blocking material fills the second conveying pipe (20). The temporary blocking material overflowing from the second conveying pipe (20) returns to the second storage bin (8) through the second overflow pipe (2). 8) Add material to the fracturing pipeline (25) of the device, specifically: shut down motor two (12), feed line two (31) and overflow line two (2), turn on motor two (12), injection line two (14) and replenishment line two (29), push the temporary plugging material in delivery line two (20) into fracturing pipeline (25) through injection line two (14), and replenish the lower end of delivery line two (20) with fracturing fluid upstream of fracturing pipeline (25) through replenishment line two (29). When the temporary plugging material in delivery line two (20) is delivered, shut down injection line two (14) and replenishment line two (29). 9) Repeat step 7) add material into the second feeding device, and at the same time repeat step 6) inject material into the fracturing pipeline (25) of the first feeding device; when the injection of material into the fracturing pipeline (25) of the first feeding device is completed, repeat step 5) add material into the first feeding device, and at the same time repeat step 8) inject material into the fracturing pipeline (25) of the second feeding device; complete the injection of all temporary plugging materials according to the above cycle.

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