Multi-parallel assisted boosting type temporary plugging material adding device and process method

Abstract

The application belongs to the technical field of oil and gas exploration, and specifically provides a multi-path parallel boosting type temporary plugging material adding device and process method, which comprises an input pipeline, an output pipeline, multiple injection pipelines and multiple adding units, multiple valve I are connected to the left side of the input pipeline, the right side of the input pipeline is connected to the inlet of the multiple injection pipelines, the outlet of the multiple injection pipelines is connected to the left side of the output pipeline, multiple valve II are connected to the right side of the output pipeline, and each injection pipeline is connected to one adding unit. The application solves the problems of small volume, complex structure, high-pressure injury, high labor intensity, low efficiency and high cost of the existing high-pressure adding device, and has the advantages of large volume, simple structure, avoidance of high-pressure injury, low labor intensity, high efficiency and low cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas exploration, and particularly relates to a multi-path parallel boosting type temporary plugging material adding device and process method. BACKGROUND

[0002] Temporary plugging and fracturing can realize the diversity and complexity of reservoir fractures, improve reservoir permeability, and improve stimulation effect, and is widely used in stimulation and reconstruction operations of oil and gas reservoirs. There are three main types of existing temporary plugging material adding methods: the first type is manually added through the mixing tank of a sand mixing truck, mainly suitable for granular temporary plugging agents, the adding speed depends on experience, the labor intensity is high, the operation requirements are high, there are safety hazards such as high pressure injury and high place falling, and phenomena such as pump head sticking and pump choking of the fracturing truck are easily caused, which causes the risk of construction interruption; the second type is to connect a preloaded temporary plugging material storage pipe branch to the high-pressure manifold at the rear end of the pump truck, mainly suitable for temporary plugging balls, and the valve of the branch manifold is manually opened when adding is needed. This method has the risk of high pressure injury, the total amount added is small, and the adding speed and concentration are uncontrollable; the third type is to run a special temporary plugging material pumping system in the high-pressure manifold, and the characteristic is that the temporary plugging material pumping system is large in equipment and high in cost, which is not suitable for low-cost development strategies.

[0003] Chinese patent document with publication number CN112878976 A discloses a remote control temporary plugging material injection system and application method. The remote control 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 a high-pressure manifold to avoid the temporary plugging agents from failing to enter the manifold smoothly due to insufficient gravity to overcome the resistance. The device adopts remote control operation, relies on electrically controlled hydraulic power to control the temporary plugging agent injection system and the switch pressure isolation system, thereby avoiding the construction personnel from passing through the high-pressure area to ensure the safety of the on-site construction personnel and prevent them from being injured by possible high-pressure leakage. The device realizes the injection of temporary plugging agents and temporary plugging balls into the high-pressure manifold without stopping the pump, greatly improves the continuity of temporary plugging and fracturing construction operations, shortens the construction time, and reduces the construction cost. However, the device still runs a special temporary plugging material pumping system in the high-pressure manifold, and the characteristic is that the temporary plugging material pumping system is large in equipment and high in cost, which is not suitable for low-cost development strategies. At the same time, when the temporary plugging material is pushed into the high-pressure manifold by the push rod, the push rod cannot push the temporary plugging material when it is stretched, which prolongs the injection time. The temporary plugging material is stored in the storage cavity, which is limited by the space of the storage cavity and cannot meet the injection of large-capacity temporary plugging material. Since the device of the document is a high-pressure device, a pressure isolation system needs to be set, which is complex in structure and high in cost.

[0004] Aiming at the problems of high labor intensity, high experience requirement, high pressure injury, high place falling, pump head sticking, pump choking and the problems of high pressure injury of high pressure manifold temporary plugging material pre-setting side branch pipe, small adding amount, uncontrollable adding speed and concentration, a multi-parallel assisted temporary plugging material adding device and process method are provided, and remote control of multi-type temporary plugging material large capacity high pressure end is realized. SUMMARY

[0005] The multi-parallel assisted temporary plugging material adding device and process method provided by the application aims to overcome the problems of small volume, complex structure, high pressure injury, high labor intensity, low adding efficiency and high cost of the high pressure adding device in the prior art.

[0006] Therefore, the application provides a multi-parallel assisted temporary plugging material adding device, which comprises an input pipeline, an output pipeline, a plurality of injection pipelines and a plurality of adding units.

[0007] Preferably, each adding unit comprises a funnel, a storage bin, a valve three and a valve four, and the funnel, the valve three, the storage bin, the valve four and the injection pipeline are sequentially connected from top to bottom.

[0008] Preferably, each adding unit further comprises a displacement pipe, one end of the displacement pipe is connected to the injection pipeline, and the other end of the displacement pipe is connected to the upper side of the storage bin.

[0009] Preferably, an adjuster is connected to the displacement pipe.

[0010] Preferably, each adding unit further comprises a rectifier, which is connected to the injection pipeline between the displacement pipe and the valve four.

[0011] Preferably, an emptying valve is connected to the upper end of the displacement pipe.

[0012] Preferably, a rotor is connected in the storage bin.

[0013] Preferably, the rotor comprises a mandrel, an impeller and a spiral, the upper end of the mandrel is connected to the impeller, and the lower end of the mandrel is connected to the spiral.

[0014] Preferably, the valve four is a remote control valve.

[0015] A process method of a multi-parallel assisted temporary plugging material adding device, comprising the following steps:

[0016] 1) the input pipeline is connected to the upstream of the multiple fracturing pipelines through multiple valves one, and the output pipeline is connected to the downstream of the multiple fracturing pipelines through multiple valves two;

[0017] 2) the valves three in the multiple adding units and the exhaust valves are opened, the valves four in the multiple adding units are closed, the target amount of temporary plugging materials is added into the storage bin through the funnel, and the air in the storage bin replaced by the temporary plugging materials is discharged through the exhaust valve;

[0018] 3) the valves three in the multiple adding units and the exhaust valves are closed, the valves two connected with the fracturing pipelines are opened, and the remaining valves two are closed, and the fracturing operation is performed;

[0019] 4) when the temporary plugging materials need to be added, the valves four of the corresponding number are opened according to the temporary plugging material addition concentration, the temporary plugging materials fall to the injection pipeline through the valves four, and the temporary plugging materials falling are carried into the wellbore by the fracturing fluid, the valves four are closed after the temporary plugging materials are added, and the fracturing operation is continued;

[0020] 5) when the operation is completed, the fracturing pipelines connected to the valves one and the valves two are removed.

[0021] The beneficial effects of the present application are as follows:

[0022] 1) the multiple parallel assisted temporary plugging material adding device and process method provided by the present application connect multiple adding units in parallel through an input pipeline, an output pipeline and multiple injection pipelines, solve the contradiction between large volume and low pressure bearing, overcome the small volume of the existing high-pressure adding device, and realize the large-capacity addition target of temporary plugging materials.

[0023] 2) the multiple parallel assisted temporary plugging material adding device and process method provided by the present application adds temporary plugging materials through multiple adding units, significantly improves the addition concentration of temporary plugging materials, reduces the amount of temporary plugging agent, and reduces the cost.

[0024] 3) the multiple parallel assisted temporary plugging material adding device and process method provided by the present application adopts a structure form of multiple parallel storage bins, and the selective switch of each path can adjust the addition concentration of temporary plugging materials at any time, and optimizes the temporary plugging material construction parameters of temporary plugging and fracturing.

[0025] 4) the multiple parallel assisted temporary plugging material adding device and process method provided by the present application is a remote control valve, realizes remote control of automatic addition of temporary plugging materials, avoids the high-pressure damage risk of direct addition of the existing high-pressure manifold, is simple and convenient to operate, efficient and fast, and reduces the labor intensity of personnel.

[0026] 5、The multi-parallel assisted pushing type temporary plugging material adding device and process method provided by the application can not only make up the vacancy caused by the falling of the temporary plugging material in the storage bin, but also can assist the rapid falling of the temporary plugging material in the storage bin through the displacement pipe.

[0027] 6、The multi-parallel assisted pushing type temporary plugging material adding device and process method provided by the application can improve the displacement of the fracturing fluid in the displacement pipe through the pressure difference formed by the pressure regulating valve at the upper and lower ends of the storage bin, and can assist the falling speed of the temporary plugging material in the storage bin, so as to improve the adding speed and adding concentration.

[0028] 7、The multi-parallel assisted pushing type temporary plugging material adding device and process method provided by the application can simultaneously connect multiple high-pressure fracturing pipelines to the device, so as to ensure the adding concentration, adding speed and uniformity of the temporary plugging material.

[0029] 8、The multi-parallel assisted pushing type temporary plugging material adding device and process method provided by the application can drive the rotor in the storage bin to rotate through the fracturing fluid in the displacement pipe, and the spiral at the lower end of the rotor can ensure the sequential and stable addition of the temporary plugging material, so as to prevent the blocking of the temporary plugging agent in the storage bin.

[0030] 9、The multi-parallel assisted pushing type temporary plugging material adding device and process method provided by the application can ensure the sequential and stable delivery of the temporary plugging balls due to the large outer diameter of the temporary plugging balls and the spiral, so the device can add the temporary plugging balls and the temporary plugging agent, and is a multi-purpose temporary plugging material adding device. BRIEF DESCRIPTION OF DRAWINGS

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

[0032] Figure 1 is a structural schematic view of the multi-parallel assisted pushing type temporary plugging material adding device;

[0033] Figure 2 is Figure 1 the cross-sectional view of A-A in FIG.

[0034] The reference signs are explained as follows: 1, input pipeline; 2, output pipeline; 3, injection pipeline; 4, valve one; 5, valve two; 6, hopper; 7, storage bin; 8, valve three; 9, valve four; 10, displacement pipe; 11, regulator; 12, rectifier; 13, emptying valve; 14, rotor; 141, mandrel; 142, impeller; 143, spiral. DETAILED DESCRIPTION

[0035] Example 1:

[0036] As Figure 1 and Figure 2As shown, a multi-parallel boosting type temporary plugging material adding device includes an input pipeline 1, an output pipeline 2, a plurality of injection pipelines 3, and a plurality of adding units. The left side of the input pipeline 1 is respectively connected with a plurality of valves one 4, and the right side of the input pipeline 1 is respectively connected with the inlets of the plurality of injection pipelines 3. The outlets of the plurality of injection pipelines 3 are all connected with the left side of the output pipeline 2, and the right side of the output pipeline 2 is respectively connected with a plurality of valves two 5. Each injection pipeline 3 is connected with one adding unit.

[0037] Specifically, the input pipeline 1, the output pipeline 2, and the plurality of injection pipelines 3 are all horizontally arranged, and the plurality of adding units are all vertically arranged. The number of the valves one 4, the valves two 5, and the adding units is selected according to actual conditions, and can meet the needs. Preferably, the number of the valves one 4 and the valves two 5 is 6 specifications, and the number of the adding units is 3. The structure is simple, the operation is convenient, the land occupation is small, the use requirements are maximally met, and the cost is reduced. A plurality of high-pressure fracturing pipelines can be simultaneously connected to the multi-parallel boosting type temporary plugging material adding device, so as to ensure the adding concentration, the adding speed, and the uniformity of the temporary plugging material. At most, 6 fracturing pipelines can be connected, so as to meet the maximum number of the fracturing pipelines. The plurality of adding units are connected in parallel through the input pipeline 1, the output pipeline 2, and the plurality of injection pipelines 3. The selective switch of each path can adjust the adding concentration of the temporary plugging material at any time, and the construction parameters of the temporary plugging material for temporary plugging and fracturing are optimized. The temporary plugging material is added through the plurality of adding units, so as to significantly improve the adding concentration compared with the sand mixing truck, and to reduce the plugging risk of the temporary plugging material compared with the straight-through type adding. The contradiction between large volume and low pressure bearing is solved, the deficiency of small volume of the existing high-pressure adding device is overcome, and the large-capacity adding target of the temporary plugging material is achieved.

[0038] Embodiment 2:

[0039] On the basis of embodiment 1, each adding unit includes a funnel 6, a storage bin 7, a valve three 8, and a valve four 9. The funnel 6, the valve three 8, the storage bin 7, the valve four 9, and the injection pipeline 3 are sequentially connected from top to bottom.

[0040] The valve three 8 controls the feeding of the storage bin 7, and the valve four 9 controls the discharging of the storage bin 7. The structure is simple, and the operation is convenient.

[0041] Specifically, the funnel 6 is a horn-shaped thin-walled pipe fitting with a large upper end and a small lower end. The lower end of the funnel 6 is connected with the valve three 8 by a hinge.

[0042] The upper part of the storage bin 7 is in a cylindrical shape, and the lower part is in a conical barrel shape. The upper end of the cylindrical shape is provided with a cover plate having a hole in the center. The upper end of the storage bin 7 is connected with the valve three 8 by a hinge. The lower part of the conical barrel has a hole, and the lower end of the storage bin 7 is connected with the valve four 9 by a hinge.

[0043] Preferably, each adding unit further comprises a displacement pipe 10, one end of the displacement pipe 10 is connected to the injection pipeline 3, and the other end of the displacement pipe 10 is connected to the upper side of the storage bin 7.

[0044] Specifically, the upper side of the storage bin 7 is provided with a through hole, and the displacement pipe 10 is welded or threaded to the through hole; the displacement pipe 10 is used for supplementing and displacing the storage bin 7, preventing the liquid at the lower end of the storage bin 7 from flowing back, solving the problem that the upper part of the storage bin 7 is empty due to the falling of the temporary plugging material, forcing the liquid below to flow back, causing the temporary plugging material to float and swirl, leading to continuous attenuation of the concentration of the temporary plugging material, prolonging the adding time of the temporary plugging material, and affecting the temporary plugging effect.

[0045] Specifically, the input pipeline 1, the output pipeline 2, the plurality of injection pipelines 3, and the displacement pipe 10 are all in a circular pipe structure, and the two ends of the circular pipe are provided with nipples, which are convenient to obtain materials and connect.

[0046] The input pipeline 1 and the plurality of injection pipelines 3, the plurality of injection pipelines 3 and the output pipeline 2, and the displacement pipe 10 and the injection pipeline 3 are all connected through T-shaped nipples.

[0047] Preferably, the displacement pipe 10 is provided with a regulator 11.

[0048] Specifically, the regulator 11 is a straight pipe threaded structure; due to the dimensional error of parts, the vertical installation size of the adding unit cannot be accurately controlled, and the regulator 11 can be used to adjust the vertical installation position of the adding unit.

[0049] Preferably, each adding unit further comprises a rectifier 12, which is connected to the injection pipeline 3 between the displacement pipe 10 and the valve 4.

[0050] The rectifier 12 is a straight pipe threaded throttle nozzle structure, the threads are used to adjust the horizontal assembly position of the displacement pipe 10, and the throttle nozzle can form a pressure difference between the upstream and downstream, forcing more fracturing fluid to flow through the displacement pipe, and boosting the adding speed of the temporary plugging material.

[0051] Preferably, the upper end of the displacement pipe 10 is provided with a vent valve 13.

[0052] The vent valve 13 is used to discharge the air in the storage bin, ensuring the smoothness of adding the temporary plugging material to the storage bin through the hopper 6.

[0053] Preferably, the storage bin 7 is provided with a rotor 14.

[0054] The fracturing fluid in the displacement pipe 10 drives the rotor 14 in the storage bin 7 to rotate, and the helix 143 at the lower end of the rotor can ensure the smooth addition of the temporary plugging material, preventing the temporary plugging agent in the storage bin 7 from being blocked by agglomeration or the temporary plugging ball from being blocked by bridging.

[0055] Preferably, the rotor 14 comprises a core shaft 141, an impeller 142 and a spiral 143, the upper end of the core shaft 141 is connected with the impeller 142, and the lower end of the core shaft 141 is connected with the spiral 143.

[0056] Since the temporary plugging ball has a large outer diameter, it is easy to form a bridge at the outlet of the storage bin, and the spiral can ensure the sequential and stable conveying of the temporary plugging ball, so that the device can add both temporary plugging balls and particle temporary plugging agents, and is a device compatible with multiple temporary plugging materials. The rotor structure of the device is simple and easy to operate, and has good rotating effect.

[0057] Preferably, the horizontal pipe at the upper part of the displacement pipe 10 is connected with the upper side cut surface of the storage bin 7.

[0058] The water flow from the displacement pipe 10 can better push the rotation of the impeller 142.

[0059] Preferably, the valve four 9 is a remote control valve.

[0060] The valve four 9 is a remote control valve, which realizes remote control of automatic addition of temporary plugging materials, avoids the risk of high-pressure damage caused by direct addition of the existing high-pressure manifold, is easy to operate, efficient and fast, and reduces the labor intensity of personnel. The remote control valve has a large diameter, which avoids the plugging of temporary plugging balls caused by the bridging of three balls, and thus meets the sequential addition of temporary plugging balls with a large diameter.

[0061] Preferably, the remote control valve is an electric control hydraulic plug valve.

[0062] The electric control hydraulic plug valve is used for remote control of the opening and closing of the pipeline flow passage, and has the advantages of quick opening and closing, light weight, large torque, simple structure, small relative volume, light weight, easy maintenance, good sealing performance, etc.

[0063] Preferably, the valve two 5 and the valve three 8 are plug valves. The plug valve is a kind of ball valve, which has a compact structure and quick action, and is used for controlling the opening and closing of the pipeline flow passage.

[0064] Preferably, the valve one 4 is a check valve, which ensures the flow of the fracturing fluid in the construction direction and avoids backflow.

[0065] Example 3:

[0066] On the basis of example 2, a process method of a multi-path parallel boost type temporary plugging material adding device comprises the following steps:

[0067] 1) The input pipeline 1 is connected with the upstream of the multiple fracturing pipelines through multiple valve ones 4, and the output pipeline 2 is connected with the downstream of the multiple fracturing pipelines through multiple valve twos 5;

[0068] The high-pressure manifold of large-scale fracturing generally has multiple fracturing pipelines connected with wellheads. The multiple valve one 4 (one-way valve) of the input pipeline 1 of the device is connected with the upstream of the multiple fracturing pipelines, and the multiple valve two 5 of the output pipeline of the device is connected with the downstream of the multiple fracturing pipelines. At most, 6 fracturing pipelines can be connected. The idle valve one 4 is not used, and the idle valve two 5 needs to be closed.

[0069] 2) Open the valve three 8 and the emptying valve 13 in the multiple addition units, close the valve four 9 in the multiple addition units, add the target amount of temporary plugging material into the storage bin 7 through the hopper 6, and the air in the storage bin 7 replaced by the temporary plugging material is discharged through the emptying valve 13;

[0070] 3) Close the valve three 8 and the emptying valve 13 in the multiple addition units, open the valve two connected with the fracturing pipeline, and close the remaining valve two, and then perform fracturing operation.

[0071] 4) When the temporary plugging material needs to be added, open the valve four 9 according to the addition concentration of the temporary plugging material (the more the number of opened valve four, the greater the concentration, and the faster the addition speed), and the temporary plugging material falls to the injection pipeline 3 through the valve four 9. The falling temporary plugging material is carried into the wellbore by the fracturing fluid, and at the same time, the fracturing fluid is supplemented into the storage bin 7 through the displacement pipe 10. The fracturing fluid impacts the impeller 141 at the upper end of the rotor 14 in the storage bin 7 to rotate, drives the screw 143 at the lower end of the rotor to rotate, and pushes the temporary plugging material to fall smoothly. The function of the flow regulator is to form sufficient pressure difference between the upper and lower parts of the storage bin, so that more fracturing fluid flows through the displacement pipe to boost the addition speed of the temporary plugging material.

[0072] Until the addition is completed, the valve four 9 is closed, and the fracturing operation is continued. Avoiding the carrier fluid flowing through the storage bin to cause the rotor 14 in the storage bin 7 to be worn.

[0073] 5) When the operation is completed, the fracturing pipeline connected with the valve one 4 and the valve two 5 is disassembled.

[0074] The application realizes the target of remotely controlling the addition of temporary plugging material in high-pressure pipelines, and avoids the problems of high labor intensity, high-pressure injury, falling from a high place, pump head sticking, and pump choking in the addition of the sand mixing truck. The structure of small-volume storage bin multi-parallel connection is adopted to solve the contradiction between large volume and low pressure bearing, overcome the deficiency of small volume of the existing high-pressure addition device, and realize the large-capacity addition target of the temporary plugging material. The selective opening of multiple addition units can adjust the addition concentration and addition speed of the temporary plugging material. The side branch addition of the temporary plugging material can significantly improve the addition concentration compared with the addition of the sand mixing truck, and can reduce the risk of temporary plugging material blockage compared with the straight-through addition. The displacement pipe can not only help the rapid addition of the temporary plugging material, but also drive the rotor in the storage bin to ensure the smooth and sequential addition of the temporary plugging material. The full-number addition of the fracturing pipeline can not only meet the large-displacement fracturing construction, but also guarantee the addition concentration of the temporary plugging material and the uniformity of the temporary plugging material in the fracturing fluid. Since the temporary plugging ball has a large outer diameter, it is easy to form a bridge when it is freely accumulated at the outlet of the storage bin. The spiral can ensure the smooth and stable transportation of the temporary plugging ball, so the device can add temporary plugging balls and particle temporary plugging agents, and is a compatible addition device for multiple temporary plugging materials.

[0075] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "left", "inner", "right" and the like is based on the orientation or positional relationship shown in the drawings, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation on the application.

[0076] The above examples are only illustrative of the application and do not constitute a limitation on the protection scope of the application, and any design identical or similar to the application falls within the protection scope of the application.

Claims

1. A multiplexed, parallel, booster-type, temporary-plugging material-adding device, characterized by: The application relates to a temporary plugging material adding device for hydraulic fracturing, which comprises an input pipeline (1), an output pipeline (2), a plurality of injection pipelines (3) and a plurality of adding units, the left side of the input pipeline (1) is connected with a plurality of valves I (4) respectively, the right side of the input pipeline (1) is connected with the inlets of the plurality of injection pipelines (3) respectively, the outlets of the plurality of injection pipelines (3) are connected with the left side of the output pipeline (2), the right side of the output pipeline (2) is connected with a plurality of valves II (5) respectively, and each injection pipeline (3) is connected with one adding unit; each adding unit comprises a funnel (6), a storage bin (7), a valve III (8), a valve IV (9), the funnel (6), the valve III (8), the storage bin (7), the valve IV (9) and the injection pipeline (3) are sequentially connected from top to bottom, the adding unit further comprises a displacement pipe (10), one end of the displacement pipe (10) is connected with the injection pipeline (3), and the other end of the displacement pipe (10) is connected with the upper side of the storage bin (7); the displacement pipe (10) is used for supplementing and displacing the storage bin (7); the upper end of the displacement pipe (10) is provided with a vent valve (13); the storage bin (7) is provided with a rotor (14); the rotor (14) comprises a mandrel (141), an impeller (142) and a spiral (143), the upper end of the mandrel (141) is connected with the impeller (142), and the lower end of the mandrel (141) is connected with the spiral (143).

2. The multiparallel assisted-boost temporary-plugging material feeding device of claim 1, wherein: The displacement pipe (10) is provided with an adjuster (11).

3. The multiparallel assisted-boost temporary-plugging material feeding device of claim 1, wherein: The adding unit further comprises a rectifier (12), which is connected to the injection pipeline (3) between the displacement pipe (10) and the valve IV (9).

4. The multiparallel assisted boost-type bridging material feeding device of claim 1, wherein: The valve IV (9) is a remote control valve.

5. A process based on the multiparallel-parallel assisted-boost type temporary plugging material adding device according to any one of claims 1-4, characterized in that: The application further discloses a temporary plugging material adding method for hydraulic fracturing, which comprises the following steps: 1) the input pipeline (1) is connected with the upstream of a plurality of fracturing pipelines through a plurality of valves I (4), and the output pipeline (2) is connected with the downstream of the plurality of fracturing pipelines through a plurality of valves II (5); 2) the valve III (8) and the vent valve (13) in the plurality of adding units are opened, the valve IV (9) in the plurality of adding units is closed, a target amount of temporary plugging material is added into the storage bin (7) through the funnel (6), and the air in the storage bin (7) replaced by the temporary plugging material is discharged through the vent valve (13); 3) the valve III (8) and the vent valve (13) in the plurality of adding units are closed, the valve II (5) connected with the fracturing pipeline is opened, the remaining valve II (5) is closed, and fracturing construction is carried out; 4) when the temporary plugging material needs to be added, a corresponding number of valve IV (9) is opened according to the adding concentration of the temporary plugging material, the temporary plugging material falls to the injection pipeline (3) through the valve IV (9), meanwhile, the fracturing fluid in the displacement pipe (10) and the rotor (14) drive the temporary plugging material in the storage bin (7) to quickly descend, the descending temporary plugging material is carried into the wellbore by the fracturing fluid, the adding of the temporary plugging material is completed, the valve IV (9) is closed, and the fracturing construction is continuously carried out; 5) when the construction is completed, the fracturing pipelines connected with the valve I (4) and the valve II (5) are removed.

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