Alternating temporary plugging material adding device and process method

Abstract

The invention belongs to the technical field of petroleum and natural gas exploration and development, and particularly provides an alternate temporary plugging material adding device and a technological method.The alternate temporary plugging material adding device comprises a fracturing pipeline, a first adding device and a second adding device, the first adding device comprises a first storage bin, a first feeding pipeline, a first conveying device, a first overflow return pipeline, a first injection pipeline and a first liquid supplementing pipeline; the problems that an existing high-pressure adding device is small in volume, complex in structure, high in labor intensity, low in filling efficiency and high in cost and has high-pressure damage are solved, the risk of high-pressure damage is reduced, operation is easy and convenient, and rapidness and high efficiency are achieved. The labor intensity of personnel is reduced, the filling efficiency is high, the cost is low, and high-pressure end adding of the high-capacity temporary plugging material is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to an alternating temporary plugging material adding device and a process method. Background Art

[0002] Temporary plugging fracturing can achieve the diversity and complexity of reservoir fractures, improve reservoir permeability, and increase production effects. It is widely used in the production enhancement and transformation operations of oil and gas reservoirs. There are three main ways to add temporary plugging materials: the first is to add them manually through the mixing tank of the sand mixer, which is mainly suitable for granular temporary plugging agents. The addition speed depends on experience, the labor intensity is high, the operation requirements are high, and there are safety hazards such as high-pressure damage and falling from heights. It is easy to cause the pump head of the fracturing truck to stick and suffocate, causing the risk of construction interruption; the second is to connect the side branch of the storage pipe pre-loaded with temporary plugging materials to the high-pressure manifold at the rear end of the pump truck, which is mainly suitable for temporary plugging balls. When filling is required, the valve of the side branch manifold is manually opened. This method has the risk of high-pressure damage, the total amount added is small, and the addition speed and concentration are uncontrollable; the third is to run a special temporary plugging material pumping system in the high-pressure manifold. The characteristics are that the temporary plugging material pumping system equipment is large and the cost is high, which is not suitable for low-cost development strategies.

[0003] The Chinese patent document with publication number CN112878976 A discloses a remote-controlled temporary plugging material injection system and application method. The remote-controlled temporary plugging material injection device includes a temporary plugging agent injection system, a temporary plugging agent storage system and a pressure isolation system, which is mainly used to inject temporary plugging agents and temporary plugging balls into the high-pressure manifold to prevent the temporary plugging agent from being unable to enter the manifold smoothly due to insufficient gravity to overcome resistance. The device in the document adopts remote control operation, relying on electric-controlled hydraulic power to control the temporary plugging agent injection system and the switch pressure isolation system, so as to avoid construction personnel from crossing the high-pressure area to ensure the safety of on-site construction personnel, so as to avoid possible high-pressure leakage injuries. It realizes the temporary plugging agent and temporary plugging ball that are continuously pumped into the high-pressure manifold, greatly improving the continuity of temporary plugging fracturing operation; shortening the construction time and reducing the construction cost; however, the device in the document still has a special temporary plugging material pumping system in the high-pressure manifold, which is characterized by large equipment and high cost of the temporary plugging material pumping system, which is not suitable for low-cost development strategy; at the same time, when the temporary plugging material is pushed from the temporary plugging material storage chamber into the high-pressure manifold by the push rod, firstly, the temporary plugging material cannot be pushed in when the push rod is stretched, which prolongs the injection time; secondly, the temporary plugging material exists in the storage chamber, and is limited by the storage chamber space, and cannot meet the injection of large-capacity temporary plugging materials; since the device in the document is a high-pressure device, a pressure sealing system needs to be set up, which has a complex structure and high cost.

[0004] Aiming at the high labor intensity and high experience requirement of low-pressure addition in sand mixing truck, the problems of high-pressure injury, falling from height, pump head sticking, pump blocking, as well as the high-pressure injury of temporary plugging materials pre-placed in the side branch pipe of the high-pressure manifold, small addition amount, uncontrollable addition speed and concentration, an alternating large-capacity temporary plugging material high-pressure addition device and process method are proposed to realize remote control of automatic addition of large-capacity high-pressure end of multiple types of temporary plugging materials. Summary of the invention

[0005] The invention provides an alternating temporary plugging material adding device and process method to overcome the problems of small volume, complex structure, high pressure damage, high labor intensity, low filling efficiency and high cost of the high pressure adding device in the prior art.

[0006] To this end, the present invention provides an alternating temporary plugging material adding device, comprising a fracturing pipeline, an adding device 1 and an adding device 2, wherein the adding device 1 comprises a storage bin 1, a feeding pipeline 1, a conveying device 1, a backflow pipeline 1, an injection pipeline 1 and a liquid replenishment pipeline 1, wherein the conveying device 1 is respectively connected to one end of the feeding pipeline 1, one end of the backflow pipeline 1 and one end of the injection pipeline 1, the other end of the backflow pipeline 1 and the other end of the feeding pipeline 1 are both connected to the storage bin 1, the other end of the injection pipeline 1 and one end of the liquid replenishment pipeline 1 are both connected to the fracturing pipeline; the other end of the liquid replenishment pipeline 1 is connected to one end of the injection pipeline 1;

[0007] The second adding device comprises a second storage bin, a second feeding pipeline, a second conveying device, a second overflow pipeline, a second injection pipeline and a second liquid replenishment pipeline. The second conveying device is respectively 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 end of the second overflow pipeline and the other end of the second feeding pipeline are both connected to the second storage bin, the other end of the second injection pipeline and one end of the second liquid replenishment pipeline are both connected to the fracturing pipeline, and the other end of the second liquid replenishment pipeline is connected to one end of the second injection pipeline.

[0008] Preferably, the bottom surface of the first storage bin and the bottom surface of the second storage bin are both inclined surfaces.

[0009] Preferably, the feeding pipeline is provided with a feeding valve, the overflow pipeline is provided with a overflow valve, the injection pipeline is provided with an injection valve, and the liquid replenishment pipeline is provided with a liquid replenishment valve;

[0010] The second feeding pipeline is provided with a second feeding valve, the second overflow pipeline is provided with a second overflow valve, the second injection pipeline is provided with a second injection valve, and the second liquid replenishment pipeline is provided with a second liquid replenishment valve.

[0011] Preferably, the feeding valve 1, the overflow valve 1, the injection valve 1, the liquid replenishing valve 1, the feeding valve 2, the overflow valve 2, the injection valve 2, and the liquid replenishing valve 2 are all electrically controlled hydraulic plug valves.

[0012] Preferably, the conveying device comprises a motor, a conveying pipe and an auger, the conveying pipe is arranged at an angle, the conveying pipe is connected to an auger inside, one end of the auger passes through the upper end surface of the conveying pipe and is connected to the power output end of the motor, a backflow port, an injection port and a feeding port are successively opened on the upper end part, below the upper end part and above the lower end part of the conveying pipe, the backflow port is connected to one end of the backflow pipeline, the injection port is connected to one end of the injection pipeline, and the feeding port is connected to one end of the feeding pipeline.

[0013] Preferably, the second conveying device includes a second motor, a second conveying pipe and a second auger. The second conveying pipe is arranged at an angle. The second auger is connected inside the second conveying pipe. One end of the second auger passes through the upper end surface of the second conveying pipe and is connected to the power output end of the second motor. A second overflow port, a second injection port and a second feeding port are successively opened on the upper end portion, below the upper end portion and above the lower end portion of the second conveying pipe. The second overflow port is connected to one end of the second overflow pipeline, the second injection port is connected to one end of the second injection pipeline, and the second feeding port is connected to one end of the second feeding pipeline.

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

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

[0016] Preferably, a first feeding port is provided on the top of the first storage bin, and a second feeding port is provided on the top of the second storage bin.

[0017] A process method based on the alternating temporary plugging material adding device comprises 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 pipeline 1, injection pipeline 2, liquid replenishment pipeline 1 and liquid replenishment pipeline 2, close overflow pipeline 1, overflow pipeline 2, feed pipeline 1 and feed pipeline 2, and perform pressure test on the alternating temporary plugging material adding device until it is qualified;

[0020] 3) Close the recovery port 1 and the recovery port 2, add temporary plugging material into the storage bin 1 from the feeding port 1, and add temporary plugging material into the storage bin 2 from the feeding port 2;

[0021] 4) Injection pipeline 1, injection pipeline 2, fluid replenishment pipeline 1 and fluid replenishment pipeline 2 are closed, and fracturing fluid is used to perform fracturing construction through the fracturing pipeline;

[0022] 5) When temporary plugging material needs to be added, add material into the adding device 1, specifically: open the feeding pipeline 1 and the overflow pipeline 1, the temporary plugging material falls to the lower end of the conveying pipe 1 through the feeding pipeline 1, start the motor 1, the motor 1 drives the auger 1 to rotate, and the temporary plugging material in the lower end of the conveying pipe 1 is conveyed upward until the temporary plugging material fills the conveying pipe 1, and the temporary plugging material overflowing from the conveying pipe 1 is returned to the storage bin 1 through the overflow pipeline 1;

[0023] 6) Adding device 1 to inject material into the fracturing pipeline, specifically: turn off motor 1, feeding pipeline 1 and overflow pipeline 1, turn on motor 1, injection pipeline 1 and fluid replenishment pipeline 1, push the temporary plugging material in the delivery pipe 1 into the fracturing pipeline through injection pipeline 1, and replenish the fracturing fluid upstream of the fracturing pipeline into the lower end of the delivery pipe through fluid replenishment pipeline 1. When the temporary plugging material in the delivery pipe 1 is transported, close injection pipeline 1 and fluid replenishment pipeline 1, and repeat step 5) to add material to the adding device 1;

[0024] 7) Adding materials into the second adding device, specifically: opening the second feeding pipeline and the second overflow pipeline, the temporary blocking material falls to the lower end of the second conveying pipe through the second feeding pipeline, starting the second motor to drive the second auger to rotate, and the temporary blocking material in the lower end of the second conveying pipe is transported upward until the temporary blocking material fills the second conveying pipe, and the temporary blocking material overflowing from the second conveying pipe is returned to the second storage bin through the second overflow pipeline;

[0025] 8) Adding device 2 to inject material into the fracturing pipeline, specifically: turn off motor 2, feeding pipeline 2 and overflow pipeline 2, turn on motor 2, injection pipeline 2 and replenishment pipeline 2, push the temporary plugging material in the delivery pipe 2 into the fracturing pipeline through injection pipeline 2, and replenish the fracturing fluid in the upstream of the fracturing pipeline to the lower end of the delivery pipe 2 through replenishment pipeline 2. When the temporary plugging material in the delivery pipe 2 is delivered, close injection pipeline 2 and replenishment pipeline 2;

[0026] 9) Repeat step 7) to add material to the adding device 2, and repeat step 6) to add material to the adding device 1 to inject material into the fracturing pipeline; when the injection of material into the fracturing pipeline by the adding device 1 is completed, repeat step 5) to add material to the adding device 1, and repeat step 8) to add material to the adding device 2 to inject material into the fracturing pipeline; complete the injection of all temporary plugging materials according to the above cycle.

[0027] Beneficial effects of the present invention:

[0028] 1. The alternating temporary plugging material adding device and process method provided by the present invention include adding device 1 and adding device 2. The two sets of adding devices adopt an alternating feeding and injection method to solve the contradiction between large volume and low pressure, overcome the deficiency of small volume of existing high-pressure adding devices, and achieve the goal of large-capacity addition of temporary plugging materials.

[0029] 2. The alternating temporary plugging material adding device and process method provided by the present invention, the feeding valve 1, the overflow valve 1, the injection valve 1, the liquid replenishing valve 1, the feeding valve 2, the overflow valve 2, the injection valve 2 and the liquid replenishing valve 2 are all electrically-controlled hydraulic plug valves. The electrically-controlled hydraulic plug valve has the advantages of large torque, rapid switching and convenient control. The electrically-controlled hydraulic plug valve realizes remote control of automatic addition of temporary plugging materials, avoids the risk of high-pressure injury caused by direct addition of existing high-pressure manifolds, is easy to operate, fast and efficient, and reduces the labor intensity of personnel.

[0030] 3. The alternating temporary plugging material adding device and process method provided by the present invention timely replenishes the deficit volume of delivery pipe one through liquid replenishment pipeline one, and timely replenishes the deficit volume of delivery pipe two through liquid replenishment pipeline two, thereby ensuring continuous and stable addition of temporary plugging material and avoiding interference of temporary plugging material delivery caused by liquid reflux in delivery pipes one and two. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0034] Figure 3 yes Figure 2 Bottom view at middle AA position.

[0035] Explanation of the accompanying drawings: 1. overflow pipeline one; 2. overflow pipeline two; 3. cover plate one; 4. cover plate two; 5. feeding port one; 6. feeding port two; 7. storage bin one; 8. storage bin two; 9. overflow valve one; 10. overflow valve two; 11. motor one; 12. motor two; 13. injection pipeline one; 14. injection pipeline two; 15. injection valve one; 16. injection valve two; 17. feeding valve one; 18. feeding valve two; 19. delivery pipe one; 20. delivery pipe two; 21. auger one; 22. auger two; 23. recovery port one; 24. recovery port two; 25. fracturing pipeline; 26. inlet; 27. outlet; 28. fluid replenishment pipeline one; 29. ​​fluid replenishment pipeline two; 30. feeding pipeline one; 31. feeding pipeline two; 32. fluid replenishment valve one; 33. fluid replenishment valve two. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 3 As shown, an alternating temporary plugging material adding device includes a fracturing pipeline 25, an adding device 1 and an adding device 2, wherein the adding device 1 includes a storage bin 7, a feeding pipeline 30, a conveying device 1, a backflow pipeline 1, an injection pipeline 13 and a liquid replenishing pipeline 28, the conveying device 1 is respectively connected to one end of the feeding pipeline 30, one end of the backflow pipeline 1, and one end of the injection pipeline 13, the other end of the backflow pipeline 1 and the other end of the feeding pipeline 30 are both connected to the storage bin 7, the other end of the injection pipeline 13 and one end of the liquid replenishing pipeline 28 are both connected to the fracturing pipeline 25; the other end of the liquid replenishing pipeline 28 is connected to one end of the injection pipeline 13;

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

[0040] The alternating temporary plugging material adding device provided by the present invention includes adding device 1 and adding device 2. The two adding devices adopt an alternating feeding and injection method to solve the contradiction between large volume and low pressure bearing, overcome the deficiency of small volume of existing high-pressure adding devices, and achieve the goal of adding large volume of temporary plugging materials. The conveying device 1 is replenished with liquid in time through the replenishing pipeline 1 28, and the deficit volume of the conveying device 2 is replenished with liquid in time through the replenishing pipeline 2 29, so as to ensure the continuous and stable addition of temporary plugging materials and avoid the interference of liquid reflux in the conveying device 1 and the conveying device 2 on the temporary plugging material transportation. The excess temporary plugging material in the conveying device 1 is returned to the storage bin 1 7 in time through the overflow pipeline 1, so as to ensure that the conveying device 1 is full of temporary plugging materials when adding materials; the excess temporary plugging material in the conveying device 2 is returned to the storage bin 2 8 in time through the overflow pipeline 2, so as to ensure that the conveying device 2 is full of temporary plugging materials when adding materials.

[0041] Preferably, the bottom surface of the storage bin 1 7 and the bottom surface of the storage bin 2 8 are both inclined surfaces.

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

[0043] Preferably, the storage bin 1 7 and the storage bin 2 8 are a box body, which includes a top surface, a front surface, a back 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 front surface, the right surface, the back surface and the left surface are circumferentially connected between the top surface and the bottom surface, and the front surface, the back surface, the left surface and the right surface are all vertically arranged, and the bottom surface is in an inclined state, sloping downward from the upper front corner of the box body to the lower rear corner.

[0044] The storage bin 1 7 and the storage bin 2 8 of this structure are simple in structure and occupy a small space. The inclined surface prevents the temporary plugging materials entering the storage bin 1 7 and the storage bin 2 8 from being easily accumulated on the bottom surface, making it easier for the temporary plugging materials to enter the injection pipeline.

[0045] Preferably, the storage bin 1 7 and the storage bin 2 8 are made of a box body welded by steel plates, and the storage bin 1 7 and the storage bin 2 8 are arranged side by side. It is convenient to obtain materials, economical and practical.

[0046] Preferably, a feeding port 1 5 is provided on the top of the storage bin 1 7, and a feeding port 2 6 is provided on the top of the storage bin 2 8. The feeding port 1 5 and the feeding port 2 6 are convenient for feeding.

[0047] Preferably, the feeding port 1 5 is provided with a cover plate 1 3, and the feeding port 2 6 is provided with a cover plate 2 4; the cover plate 1 3 facilitates the opening and closing of the feeding port 1 5, and the cover plate 2 4 facilitates the opening and closing of the feeding port 2 6. Specifically, the cover plate 1 3 and the cover plate 2 4 are both caps, and one end of the cap is hingedly connected to the upper surface of the storage bin 1 7 or the storage bin 2 8.

[0048] Preferably, the feeding pipeline 130 is provided with a feeding valve 17, the overflow pipeline 1 is provided with a overflow valve 9, the injection pipeline 13 is provided with an injection valve 15, and the liquid replenishment pipeline 28 is provided with a liquid replenishment valve 32;

[0049] The second feeding pipeline 31 is provided with a second feeding valve 18 , the second overflow pipeline 2 is provided with a second overflow valve 10 , the second injection pipeline 14 is provided with a second injection valve 16 , and the second liquid replenishment pipeline 29 is provided with a second liquid replenishment valve 33 .

[0050] The switch of the feeding pipeline 30 is conveniently controlled by the feeding valve 17, the switch of the overflow pipeline 1 is conveniently controlled by the overflow valve 9, the switch of the injection pipeline 13 is conveniently controlled by the injection valve 15, the switch of the replenishment pipeline 28 is conveniently controlled by the replenishment valve 32, the switch of the feeding pipeline 31 is conveniently controlled by the feeding valve 18, the switch of the overflow pipeline 2 is conveniently controlled by the overflow valve 10, the switch of the overflow pipeline 2 is conveniently controlled by the injection valve 16, and the switch of the injection pipeline 14 is conveniently controlled by the replenishment valve 33. Specifically, each valve is connected to its corresponding pipeline through a union.

[0051] Preferably, the feeding valve 17, the overflow valve 9, the injection valve 15, the liquid replenishing valve 32, the feeding valve 18, the overflow valve 10, the injection valve 16 and the liquid replenishing valve 33 are all electrically controlled hydraulic plug valves.

[0052] The electric-hydraulic plug valve has the advantages of large torque, rapid switching and convenient control. The electric-hydraulic plug valve realizes remote control of automatic addition of temporary plugging materials, avoiding the risk of high-pressure injury caused by direct addition of existing high-pressure manifolds. It is easy to operate, fast and efficient, and reduces the labor intensity of personnel.

[0053] Preferably, the conveying device comprises a motor 11, a conveying pipe 19 and an auger 21. The conveying pipe 19 is arranged at an angle. The conveying pipe 19 is connected to the auger 21. One end of the auger 21 passes through the upper end surface of the conveying pipe 19 and is connected to the power output end of the motor 11. A backflow port 1, an injection port 1 and a feeding port 1 are successively provided on the upper end portion, below the upper end portion and above the lower end portion of the conveying pipe 19. The backflow port 1 is connected to one end of the backflow pipeline 1, the injection port 1 is connected to one end of the injection pipeline 13, and the feeding port 1 is connected to one end of the feeding pipeline 30.

[0054] Specifically, the conveying pipe 19 is connected to the auger 21, and the two are matched with free clearance, with the front higher and the back lower, and are installed at an angle, which can increase the volume of the conveying pipe 19. The auger 21 is a right-handed spiral structure with an axis. 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, and the front end of the core shaft of the auger 21 extends out of the round hole and is connected to the output shaft of the motor 11. The connection method can be flange, sleeve, spline, etc. The conveying device of this structure can smoothly convey the temporary blocking solution during stirring, prevent the temporary blocking liquid from sedimentation and blockage during transportation, 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 arranged at an angle. The second auger 22 is connected inside the second conveying pipe 20. One end of the second auger 22 passes through the upper end surface of the second conveying pipe 20 and is connected to the power output end of the second motor 12. A second overflow port, a second injection port and a second feeding port are successively opened on the upper end part, below the upper end part and above the lower end part of the second conveying pipe 20. The second overflow port is connected to one end of the overflow pipeline 22, the second injection port is connected to one end of the injection pipeline 14, and the second feeding port is connected to one end of the feeding pipeline 31.

[0056] Specifically, the conveying pipe 20 is connected to the auger 22, and the two are matched with free clearance, with the front higher and the back lower, and are installed at an angle, which can increase the volume of the conveying pipe 20. The auger 22 is a right-handed spiral structure with an axis. 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 core shaft of the auger 22 extends out of the round hole and is connected to the output shaft of the motor 12. The connection method can be flange, sleeve, spline, etc. The conveying device 2 of this structure can smoothly convey the temporary blocking solution during stirring, prevent the temporary blocking liquid from sedimentation and blockage during transportation, and improve the conveying efficiency.

[0057] Preferably, the motor 1 11 and the motor 2 12 are both frequency-modulated motors.

[0058] By using a frequency-modulated motor to control the spiral speed, the speed of adding temporary plugging materials can be adjusted at any time, the amount of temporary plugging materials can be effectively controlled, and temporary plugging fracturing operations of different scales can be realized.

[0059] Preferably, the pitch and tooth height of the spiral are greater than the diameter of the largest temporary plugging ball currently on site, which is 25 mm, to meet the requirements of sequential addition of temporary plugging balls with larger diameters.

[0060] Preferably, a recovery port 1 23 is provided at the bottom of the storage bin 1 7 , and a recovery port 2 24 is provided at the bottom of the storage bin 2 8 .

[0061] After the construction is completed, if there is any temporary plugging material left in the storage bin or the construction is interrupted due to other reasons, the excess temporary plugging material can be recovered through the recovery port 1 23 and the recovery port 2 24 .

[0062] Preferably, the recycling port 1 23 and the recycling port 2 24 are both provided with a recycling cover plate, which switches the recycling port 1 23 or the recycling port 2 24 .

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

[0064] Specifically, the lower end side of the feeding pipeline 30 is connected to the replenishing pipeline 28, and the fracturing fluid is used to replenish the filler deficit at the lower end of the delivery pipe 19 through the replenishing pipeline 28;

[0065] The lower end side of the feeding pipeline 2 31 is connected to the replenishing pipeline 2 29 , and the fracturing fluid is used to replenish the filler deficit at the lower end of the delivery pipe 2 20 through the replenishing pipeline 29 .

[0066] Embodiment 2:

[0067] On the basis of Example 1, a process method based on the alternating temporary plugging material adding device comprises the following steps:

[0068] 1) When 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 pipeline 13, injection pipeline 2 14, liquid replenishment pipeline 1 28 and liquid replenishment pipeline 2 29 (i.e., open injection valve 15, injection valve 2 16, liquid replenishment valve 1 32 and liquid replenishment valve 2 33), close overflow pipeline 1 1, overflow pipeline 2 2, feed pipeline 1 30 and feed pipeline 2 31 (i.e., close overflow valve 1 9, overflow valve 2 10, feed valve 1 17 and feed valve 2 18), close the wellhead main valve, perform pressure test synchronously with the surface pipeline, and perform pressure test on the alternating temporary plugging material adding device until it is qualified; after the pressure test is qualified, perform the subsequent steps;

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

[0071] 4) closing the injection pipeline 13, the injection pipeline 2 14, the replenishment pipeline 1 28 and the replenishment pipeline 2 29 (i.e. closing the injection valve 15, the injection valve 2 16, the replenishment valve 1 32 and the replenishment valve 2 33), and the fracturing fluid is used for fracturing construction through the fracturing pipeline 25;

[0072] 5) When temporary plugging material needs to be added, add material into the adding device 1, specifically: open the feeding pipeline 130 and the overflow pipeline 1 (i.e., remotely open the feeding valve 17 and the overflow valve 9), the temporary plugging material falls to the lower end of the conveying pipe 19 through the feeding pipeline 30, start the motor 11, the motor 11 drives the auger 21 to rotate, and the temporary plugging material in the lower end of the conveying pipe 19 is conveyed upward until the temporary plugging material fills the conveying pipe 19, and the temporary plugging material overflowing from the conveying pipe 19 is returned to the storage bin 7 through the overflow pipeline 1;

[0073] 6) Adding device 1 to inject material into fracturing pipeline 25, specifically: close motor 11, feeding pipeline 30 and overflow pipeline 1, open motor 11, injection pipeline 13 and replenishment pipeline 28, push the temporary plugging material in delivery pipe 19 into fracturing pipeline 25 through injection pipeline 13, and replenish the fracturing fluid in the upstream of fracturing pipeline 25 to the lower end of delivery pipe 19 through replenishment pipeline 28. When the temporary plugging material in delivery pipe 19 is transported, close injection pipeline 13 and replenishment pipeline 28, and repeat step 5) to add material into adding device 1;

[0074] 7) Adding materials to the second adding device, specifically: opening the second feeding pipeline 31 and the second overflow pipeline 2, the temporary blocking material falls to the lower end of the second conveying pipe 20 through the second feeding pipeline 31, starting the second motor 12 to drive the second auger 22 to rotate, and the temporary blocking material in the lower end of the second conveying pipe 20 is transported upward until the temporary blocking material fills the second conveying pipe 20, and the temporary blocking material overflowing from the second conveying pipe 20 is returned to the second storage bin 8 through the second overflow pipeline 2;

[0075] 8) Adding device 2 to inject material into the fracturing pipeline 25, specifically: close the motor 212, the feeding pipeline 2131 and the overflow pipeline 22, open the motor 212, the injection pipeline 214 and the replenishment pipeline 2129, push the temporary plugging material in the delivery pipe 212 into the fracturing pipeline 25 through the injection pipeline 214, and replenish the fracturing fluid in the upstream of the fracturing pipeline 212 to the lower end of the delivery pipe 212 through the replenishment pipeline 2129. When the temporary plugging material in the delivery pipe 212 is delivered, close the injection pipeline 214 and the replenishment pipeline 2129;

[0076] 9) Repeat step 7) to add material to the adding device 2, and repeat step 6) to add material to the adding device 1 to inject material into the fracturing pipeline 25; when the adding device 1 is injected into the fracturing pipeline 25, repeat step 5) to add material to the adding device 1, and repeat step 8) to add material to the adding device 2 to inject material into the fracturing pipeline 25; complete the injection of all temporary plugging materials according to the above cycle.

[0077] The closing or opening of the above-mentioned valves is remotely operated, which realizes remote control of automatic addition of temporary plugging materials, avoids the risk of high-pressure injury caused by direct addition of existing high-pressure manifolds, is easy to operate, quick and efficient, reduces the labor intensity of personnel, and achieves the goal of adding temporary plugging materials at the high-pressure end. By adding high-concentration temporary plugging materials through the side branch, the concentration of temporary plugging materials can be significantly increased, the amount of temporary plugging agents can be reduced, and the cost can be reduced. The method of alternating feeding and injection of two sets of small-volume conveying pipes solves the contradiction between large volume and low pressure, overcomes the deficiency of small volume of existing high-pressure adding devices, has a simple structure, and achieves the goal of large-capacity addition of temporary plugging materials with a small volume.

[0078] In the description of the present invention, it is necessary to understand that if there are terms such as "front" and "rear" indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention.

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

Claims

1. An alternating temporary plugging material adding device, characterized in that: The invention comprises a fracturing pipeline (25), a feeding device 1 and a feeding device 2, wherein the feeding device 1 comprises a storage bin 1 (7), a feeding pipeline 1 (30), a conveying device 1, a backflow pipeline 1 (1), an injection pipeline 1 (13) and a liquid replenishment pipeline 1 (28), wherein the conveying device 1 is respectively connected to one end of the feeding pipeline 1 (30), one end of the backflow pipeline 1 (1) and one end of the injection pipeline 1 (13), the other end of the backflow pipeline 1 (1) and the other end of the feeding 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 liquid replenishment pipeline 1 (28) are both connected to the fracturing pipeline (25); the other end of the liquid replenishment pipeline 1 (28) is connected to one end of the injection pipeline 1 (13); The second adding device comprises a second storage bin (8), a second adding pipeline (31), a second conveying device, a second overflow pipeline (2), a second injection pipeline (14) and a second liquid replenishment pipeline (29). The second conveying device is respectively connected to one end of the second adding 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 adding pipeline (31) are both connected to the second storage bin (8). The other end of the second injection pipeline (14) and one end of the second liquid replenishment pipeline (29) are both connected to the fracturing pipeline (25). The other end of the second liquid replenishment pipeline (29) is connected to one end of the second injection pipeline (14).

2. The alternating temporary plugging material adding device according to claim 1, characterized in that: The bottom surface of the first storage bin (7) and the bottom surface of the second storage bin (8) are both inclined surfaces.

3. The alternating temporary plugging material adding device according to claim 1, characterized in that: The feeding pipeline (30) is provided with a feeding valve (17), the overflow pipeline (1) is provided with a overflow valve (9), the injection pipeline (13) is provided with an injection valve (15), and the liquid replenishment pipeline (28) is provided with a liquid replenishment valve (32); The second feeding pipeline (31) is provided with a second feeding valve (18), the second overflow pipeline (2) is provided with a second overflow valve (10), the second injection pipeline (14) is provided with a second injection valve (16), and the second liquid replenishment pipeline (29) is provided with a second liquid replenishment valve (33).

4. The alternating temporary plugging material adding device according to claim 3, characterized in that: The feeding valve 1 (17), the overflow valve 1 (9), the injection valve 1 (15), the liquid replenishing valve 1 (32), the feeding valve 2 (18), the overflow valve 2 (10), the injection valve 2 (16), and the liquid replenishing valve 2 (33) are all electrically controlled hydraulic plug valves.

5. The alternating temporary plugging material adding device according to claim 1, characterized in that: The conveying device comprises a motor (11), a conveying pipe (19) and an auger (21). The conveying pipe (19) is arranged obliquely. The conveying pipe (19) is connected to the auger (21). One end of the auger (21) passes through the upper end surface of the conveying pipe (19) and is connected to the power output end of the motor (11). A backflow port (1), an injection port (1) and a feeding port (1) are sequentially provided on the upper end, the lower end and the upper end of the conveying pipe (19). The backflow port (1) is connected to one end of the backflow pipeline (1), the injection port (1) is connected to one end of the injection pipeline (13), and the feeding port (1) is connected to one end of the feeding pipeline (30).

6. The alternating temporary plugging material adding device according to claim 1, characterized in that: The second conveying device comprises a second motor (12), a second conveying pipe (20) and a second auger (22). The second conveying pipe (20) is arranged obliquely. The second auger (22) is connected inside the second conveying pipe (20). One end of the second auger (22) passes through the upper end surface of the second conveying pipe (20) and is connected to the power output end of the second motor (12). A second overflow port, a second injection port and a second feeding port are sequentially opened on the upper end, the lower end and the upper end of the second conveying pipe (20). The second overflow port is connected to one end of the second overflow pipeline (2), the second injection port is connected to one end of the second injection pipeline (14), and the second feeding port is connected to one end of the second feeding pipeline (31).

7. The alternating temporary plugging material adding device according to claim 6, characterized in that: The motor 1 (11) and the motor 2 (12) are both frequency-modulated motors.

8. The alternating temporary plugging material adding device according to claim 1, characterized in that: The bottom of the first storage bin (7) is provided with a recovery port (23), and the bottom of the second storage bin (8) is provided with a recovery port (24).

9. The alternating temporary plugging material adding device according to claim 1, characterized in that: A first feeding port (5) is provided on the top of the first storage bin (7), and a second feeding port (6) is provided on the top of the second storage bin (8).

10. A process method based on the alternating temporary plugging material adding device according to any one of claims 1 to 9, characterized in that: The steps include: 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 the injection pipeline 1 (13), the injection pipeline 2 (14), the liquid replenishment pipeline 1 (28) and the liquid replenishment pipeline 2 (29), close the overflow pipeline 1 (1), the overflow pipeline 2 (2), the feed pipeline 1 (30) and the feed pipeline 2 (31), and perform a pressure test on the alternating temporary plugging material adding device until it passes the test; 3) Close the recovery port 1 (23) and the recovery port 2 (24), add temporary plugging material into the storage bin 1 (7) from the feed port 1 (5), and add temporary plugging material into the storage bin 2 (8) from the feed port 2 (6); 4) closing the injection pipeline 1 (13), the injection pipeline 2 (14), the fluid replenishment pipeline 1 (28) and the fluid replenishment pipeline 2 (29), and performing fracturing construction with the fracturing fluid through the fracturing pipeline (25); 5) When temporary plugging material needs to be added, add material into the adding device 1, specifically: open the feeding pipeline 1 (30) and the overflow pipeline 1 (1), the temporary plugging material falls to the lower end of the conveying pipe 1 (19) through the feeding pipeline 1 (30), start the motor 1 (11), the motor 1 (11) drives the auger 1 (21) to rotate, and the temporary plugging material in the lower end of the conveying pipe 1 (19) is transported upward until the temporary plugging material fills the conveying pipe 1 (19), and the temporary plugging material overflowing from the conveying pipe 1 (19) is returned to the storage bin 1 (7) through the overflow pipeline 1 (1); 6) Adding device 1 to inject material into the fracturing pipeline (25), specifically: closing motor 1 (11), feeding pipeline 1 (30) and overflow pipeline 1 (1), opening motor 1 (11), injection pipeline 1 (13) and replenishment pipeline 1 (28), pushing the temporary plugging material in the conveying pipe 1 (19) into the fracturing pipeline (25) through injection pipeline 1 (13), and replenishing the lower end of the conveying pipe 1 (19) with fracturing fluid upstream of the fracturing pipeline (25) through replenishment pipeline 1 (28). When the temporary plugging material in the conveying pipe 1 (19) is transported, closing injection pipeline 1 (13) and replenishment pipeline 1 (28), and repeating step 5) to add material into adding device 1; 7) adding material to the second adding device, specifically: opening the second feeding pipeline (31) and the second overflow pipeline (2), allowing the temporary blocking material to fall through the second feeding pipeline (31) to the lower end of the second conveying pipe (20), starting the second motor (12) to drive the second auger (22) to rotate, and transporting 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), and the temporary blocking material overflowing from the second conveying pipe (20) is returned to the second storage bin (8) through the second overflow pipeline (2); 8) Adding device 2 to inject material into the fracturing pipeline (25), specifically: closing motor 2 (12), feeding pipeline 2 (31) and overflow pipeline 2 (2), opening motor 2 (12), injection pipeline 2 (14) and replenishment pipeline 2 (29), pushing the temporary plugging material in the delivery pipe 2 (20) into the fracturing pipeline (25) through injection pipeline 2 (14), replenishing the lower end of the delivery pipe 2 (20) with fracturing fluid upstream of the fracturing pipeline (25) through replenishment pipeline 2 (29), and when the temporary plugging material in the delivery pipe 2 (20) is transported, closing injection pipeline 2 (14) and replenishment pipeline 2 (29); 9) repeating step 7) to add material to the adding device 2, and repeating step 6) to add material to the adding device 1 to inject material into the fracturing pipeline (25); after the injection of material into the fracturing pipeline (25) by the adding device 1 is completed, repeating step 5) to add material to the adding device 1, and repeating step 8) to add material to the adding device 2 to inject material into the fracturing pipeline (25); Complete the filling of all temporary plugging materials according to the above cycle.

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