Temporary plugging agent feeder for acid fracturing segmented plugging of horizontal well

Abstract

The invention relates to the technical field of acidizing and fracturing of oil fields, in particular to a temporary plugging agent feeder for acidizing and fracturing segmented plugging of a horizontal well. Comprising a shell, annular air bags, a connecting pipe, an installing plate, a fixing pipe, a throwing pipe, a valve and the like, the two annular air bags are symmetrically installed on the shell, the connecting pipe is connected between the two annular air bags, the installing plate is connected to the inner wall of the shell, the fixing pipe is connected to the installing plate, the throwing pipe is symmetrically connected to the fixing pipe, and the valve is installed on the fixing pipe. The shell is conveyed to the designated crack in a well through the continuous oil pipe, then the temporary plugging agent is poured into the shell through the continuous oil pipe, the two annular air bags can be expanded to be attached to the inner wall of the well, and therefore the left side and the right side of the designated crack can be plugged, and then the valve can be automatically opened; the temporary plugging agent in the shell is accurately put into the designated crack through the putting pipe to complete temporary plugging work, operation is easy, the working efficiency is high, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield acid fracturing, and in particular to a temporary plugging agent feeder for staged plugging of horizontal well acid fracturing. Background Art

[0002] In the field of oil and gas extraction, as the difficulty of resource development increases, horizontal well technology has been widely adopted because it can significantly increase reservoir production. Especially in deep and ultra-deep reservoirs, in order to effectively exploit the oil and gas resources in these reservoirs, complex completion technologies and production enhancement measures, such as acid fracturing, are often required. This process forms or expands fractures by injecting liquid containing proppants at high pressure, thereby optimizing the fluid flow path and improving recovery efficiency.

[0003] However, in the acid fracturing process of horizontal wells, how to effectively and accurately place temporary plugging agents at the predetermined location has become a major technical challenge. The function of temporary plugging agents is to temporarily close the treated fracture entrance after the fracturing operation, prevent the subsequent treatment fluid from flowing back, ensure the fracturing effect and reduce unnecessary resource waste. To achieve this goal, not only precise engineering calculations and designs are required, but also efficient and reliable mechanical equipment.

[0004] At present, the commonly used methods in the industry include multi-stage isolation systems, ball seat systems, and soluble bridge plugs. The multi-stage isolation system provides reliable isolation effects and adapts to a variety of well conditions, but its complex operating procedures and high costs limit its application in certain projects. The ball seat system is known for its simple and fast operation. It supports continuous multi-stage fracturing and shortens the total operation time, but it also faces size limitations and potential blockage risks. As an emerging isolation tool, the soluble bridge plug overcomes the problem that traditional mechanical bridge plugs must be recovered, but its dissolution rate and performance are affected by many factors, which brings uncertainty to actual operations. In summary, it is very important to develop a temporary plugging agent feeder for staged plugging of horizontal well acid fracturing that can meet the needs of precise delivery and has high efficiency and economic advantages. Summary of the invention

[0005] In view of this, the present invention provides a temporary plugging agent feeder for staged plugging of horizontal well acid fracturing, which can overcome the shortcomings of existing temporary plugging agent feeding equipment, which usually have low efficiency and high cost.

[0006] The technical solution is: a temporary plugging agent feeder for staged plugging of horizontal well acid fracturing, including an outer shell, an annular airbag, a connecting pipe, a mounting plate, a fixed pipe, a delivery pipe, a valve, a control component and an opening and closing component. Two annular airbags are symmetrically installed on the outer shell, and a connecting pipe is connected between the two annular airbags. The mounting plate is connected to the inner wall of the outer shell, the fixed pipe is connected to the mounting plate, the delivery pipe is symmetrically connected to the fixed pipe, the valve is installed on the fixed pipe, the control component is used to control the annular airbag to expand or contract, and the opening and closing component is used to control the valve to open or close.

[0007] As an improvement of the above-mentioned scheme, the control component includes a fixed frame, an arc tube, a first piston cylinder, a first piston plate, a return spring and an oil filling pipe. The fixed frame is connected to the inner wall of the outer shell, the arc tube connects the fixed frame and the mounting plate, the first piston cylinder is connected to the fixed frame, the first piston plate is slidably connected in the first piston cylinder, the return spring connects the first piston cylinder and the first piston plate, and the oil filling pipe connects the first piston cylinder and one of the annular airbags.

[0008] As an improvement of the above scheme, the opening and closing assembly includes a second piston cylinder, a diverter pipe, a piston rod and a connecting spring. The second piston cylinder is connected to the fixed tube, the diverter pipe connects the second piston cylinder and the connecting tube, the piston rod is slidably connected to the second piston cylinder, and the end of the piston rod is hinged to the valve stem of the valve, and the connecting spring connects the piston rod and the second piston cylinder.

[0009] As an improvement of the above scheme, a locking assembly is also included, which includes a protective tube, a fixed rod, a guide cylinder, a lifting rod, a second piston plate, a compression spring and a clamping block. The protective tube is connected to the fixed frame, the fixed rod is connected to the side of the first piston plate, and the fixed rod is located in the protective tube. The bottom of the fixed rod is separated by a clamping groove, the guide cylinder is connected to the protective tube, the lifting rod is slidably connected to the guide cylinder, the second piston plate is connected to one end of the lifting rod, and the second piston plate is in contact with the inner wall of the guide cylinder, the compression spring connects the second piston plate and the guide cylinder, and the clamping block is symmetrically connected to the other end of the lifting rod.

[0010] As an improvement of the above scheme, it also includes a mounting block and a roller, wherein the mounting block is symmetrically connected to the housing, and the roller is rotatably connected to the mounting block.

[0011] As an improvement of the above solution, it also includes a connecting column and a tapered block, wherein the connecting column is connected to the side of the shell, and the tapered block is connected to the side of the connecting column.

[0012] As an improvement of the above solution, an edge of the conical block away from the housing is a curved surface.

[0013] As an improvement of the above solution, a one-way valve is also included, and the one-way valve is installed on the delivery pipe.

[0014] Beneficial effects: 1. The present invention delivers the outer shell to the designated crack in the well through a continuous oil pipe, and then injects a temporary plugging agent into the outer shell through the continuous oil pipe, which can make the two annular airbags expand and fit the inner wall of the well, thereby sealing the left and right sides of the designated crack. Then the valve can open automatically to accurately deliver the temporary plugging agent in the outer shell into the designated crack through the delivery pipe to complete the temporary plugging work. The operation is simple, the work efficiency is high, and the cost is low.

[0015] 2. The present invention can lock the first piston plate when the valve is opened through the cooperation of the fixing rod and the clamping block, thereby preventing the annular airbag from shrinking during the temporary plugging agent delivery process, ensuring that the annular airbag can achieve a good plugging effect, that is, ensuring accurate temporary plugging of the crack.

[0016] 3. The present invention can assist the outer shell to move more smoothly in the well through the cooperation of the roller and the conical block, and under the action of the one-way valve, it can prevent the temporary plugging agent in the well from flowing back into the delivery pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the housing of the present invention.

[0019] Figure 3 It is a cross-sectional view of the fixing frame, the arc tube and the first piston cylinder of the present invention.

[0020] Figure 4 It is a schematic diagram of the specific structure of the opening and closing component of the present invention.

[0021] Figure 5 It is a schematic diagram of the specific structure of the locking assembly of the present invention.

[0022] Figure 6 It is a schematic diagram of the bottom slot of the fixing rod of the present invention and a schematic diagram of the installation of the clamping block.

[0023] Figure 7 It is a schematic diagram of the installation of the mounting block, roller, connecting column and tapered block of the present invention.

[0024] Figure 8 It is a schematic diagram of the installation of the one-way valve of the present invention.

[0025] The numbers in the figure are as follows: 001-in the well, 002-crack, 1-shell, 2-annular airbag, 201-connecting pipe, 3-mounting plate, 4-fixing pipe, 5-delivery pipe, 6-valve, 601-valve stem, 7-fixing frame, 8-arc pipe, 9-first piston cylinder, 10-first piston plate, 11-reset spring, 12-oil filling pipe, 13-second piston cylinder, 14-diverter pipe, 15-piston rod, 16-connecting spring, 17-protection tube, 18-fixing rod, 1801-slot, 19-guide cylinder, 20-lifting rod, 21-second piston plate, 22-compression spring, 23-block, 24-mounting block, 25-roller, 26-connecting column, 27-conical block, 28-check valve. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example: Figure 1 The cracks 002 shown are arranged relatively compactly, mainly for the purpose of illustrating the diagram. In actual situations, the length of the shell 1 is smaller than the distance between two adjacent cracks 002 in the well 001.

[0031] A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing, such as Figure 1-Figure 4 As shown, it includes a shell 1, an annular airbag 2, a connecting pipe 201, a mounting plate 3, a fixing pipe 4, a delivery pipe 5, a valve 6, a control component and an opening and closing component. The shell 1 is hollow, and the right end of the shell 1 is closed, while the left end of the shell 1 is a threaded interface for connecting with the end of a continuous oil pipe. The shell 1 can be sent to any position in the well 001 through the continuous oil pipe. The continuous oil pipe is a very important tool used in the horizontal well acid fracturing project, and will not be described in detail here; annular airbags 2 are installed on both sides of the outer wall of the shell 1. The number of the annular airbags 2 is two, and the material of the annular airbags 2 is the same as that of the rubber tire Similarly, a connecting tube 201 is connected between the two annular airbags 2, and the connecting tube 201 is located inside the outer shell 1. A mounting plate 3 is connected to the left side of the inner shell 1, and a fixed tube 4 is connected to the upper part of the mounting plate 3. The right end of the fixed tube 4 is in a closed state, and the left end of the fixed tube 4 is in an open state, and the left end of the fixed tube 4 is vertically flush with the left side of the mounting plate 3. Four delivery tubes 5 are symmetrically connected to the fixed tube 4, and the ends of the four delivery tubes 5 all pass through the outer wall of the outer shell 1 and are circumferentially flush with the shape of the outer wall of the outer shell 1. A valve 6 is installed on the fixed tube 4, and the control component is used to control the annular airbag 2 to expand or contract, and the opening and closing component is used to control the valve 6 to open or close.

[0032] like Figure 2 and Figure 3 As shown, the control component includes a fixed frame 7, an arc tube 8, a first piston cylinder 9, a first piston plate 10, a return spring 11 and an oil injection pipe 12. The fixed frame 7 is connected to the right side of the shell 1. The fixed frame 7 is hollow, and the lower left part of the fixed frame 7 is connected to the arc tube 8. The left end of the arc tube 8 is connected to the lower part of the mounting plate 3 and is vertically flush with the left side of the mounting plate 3. A liquid supply channel is formed between the inner wall of the arc tube 8 and the inner wall of the shell 1, and the liquid supply channel is connected to the inside of the fixed frame 7. The first piston cylinder 9 is connected to the right side of the fixed frame 7. The right end of the first piston cylinder 9 is in a closed state, the left end of the first piston cylinder 9 is in an open state, and the inside of the first piston cylinder 9 is connected to the inside of the fixed frame 7. The first piston plate 10 is slidably connected to the inside of the first piston cylinder 9. The return spring 11 is arranged in the first piston cylinder 9, and the two ends of the return spring 11 are respectively connected to the first piston cylinder 9 and the first piston plate 10. An oil injection pipe 12 is connected between the annular airbag 2 on the right and the right part of the first piston cylinder 9.

[0033] like Figure 2 and Figure 4As shown, the opening and closing assembly includes a second piston cylinder 13, a shunt pipe 14, a piston rod 15 and a connecting spring 16. The second piston cylinder 13 is connected to the front side of the fixed tube 4, and the shunt pipe 14 is connected between the right side of the second piston cylinder 13 and the connecting pipe 201 and maintains communication. The piston rod 15 is slidably connected in the second piston cylinder 13, and the left end of the piston rod 15 slides through the left side surface of the second piston cylinder 13, and the left end of the piston rod 15 is hinged to the valve stem 601 of the valve 6, and the connecting spring 16 is wound around the outside of the piston rod 15, and the two ends of the connecting spring 16 are respectively connected to the piston rod 15 and the second piston cylinder 13.

[0034] In the preparation stage, ensure that the valve 6 is in a closed state and that the first piston cylinder 9 is filled with a proper amount of hydraulic oil.When the target crack 002 is determined, the left end of the shell 1 is connected to the continuous oil pipe, and the continuous oil pipe is used to accurately transport the equipment to the specified position in the well to ensure that the annular airbags 2 on both sides are accurately aligned with the two sides of the crack 002; then the temporary plugging agent is poured into the shell 1 through the continuous oil pipe. Since the valve 6 is in a closed state, the temporary plugging agent will flow into the fixed frame 7 through the liquid supply channel formed between the arc tube 8 and the shell 1. As the temporary plugging agent in the fixed frame 7 increases, the temporary plugging agent will squeeze the first piston plate 10 and gradually move to the right, and the return spring 11 will be compressed. The return spring 11 will push the hydraulic oil in the first piston cylinder 9 into the oil injection pipe 12, and the hydraulic oil in the oil injection pipe 12 will enter the annular airbag 2 on the right. At the same time, in the guide tube 201 of the connecting pipe, the hydraulic oil in the oil injection pipe 12 will enter the annular airbag 2 on the right. Under the action of the flow passage, the hydraulic oil will also enter the annular airbag 2 on the left side, so that the annular airbags 2 on the left and right sides can expand. During the expansion process of the annular airbags 2, part of the hydraulic oil in the connecting pipe 201 will enter the shunt pipe 14. Since the elastic force of the connecting spring 16 is very large, the hydraulic oil in the shunt pipe 14 cannot enter the second piston cylinder 13 temporarily (but when the pressure in the shunt pipe 14 reaches a certain threshold, the hydraulic oil can still overcome the resistance of the connecting spring 16 and enter the second piston cylinder 13). When the annular airbags 2 on the left and right sides expand to fit the inner wall of the well 001, the annular airbags 2 cannot continue to expand. At this time, the annular airbags 2 can block the left and right sides of the designated crack 002 in the well 001, and the hydraulic oil in the connecting pipe 201 will Gradually enters the shunt pipe 14, increasing the pressure in the shunt pipe 14, so that the hydraulic oil in the shunt pipe 14 can gradually enter the second piston cylinder 13, and push the piston rod 15 to move to the left, the connecting spring 16 is compressed, and the piston rod 15 can drive the valve stem 601 of the valve 6 to rotate, so that the valve 6 can be automatically opened. At this time, the continuous oil pipe is still continuously conveying the temporary plugging agent to the shell 1, so that the temporary plugging agent in the shell 1 can enter the fixed pipe 4, and the temporary plugging agent can be conveyed to the well 001 through the delivery pipe 5. Under the plugging effect of the annular airbag 2, the temporary plugging agent can enter the designated crack 002 to complete the temporary plugging work; then the continuous oil pipe is controlled to stop the injection of the temporary plugging agent, and the connecting spring 16 will gradually return to its original state to drive the piston rod 15 to move to the right. Reset, the piston rod 15 can drive the valve stem 601 of the valve 6 to reverse, so that the valve 6 can be automatically closed, so that the delivery pipe 5 no longer delivers the temporary plugging agent to the well 001, and the piston rod 15 can also push the hydraulic oil back into the shunt pipe 14, and at the same time the reset spring 11 will gradually return to its original state to drive the first piston plate 10 to move to the left and reset, so that the hydraulic oil in the annular airbag 2, the connecting pipe 201, the shunt pipe 14 and the oil injection pipe 12 can be drawn back into the first piston cylinder 9. At this time, the annular airbag 2 will shrink due to its own elasticity and separate from the inner wall of the well 001, and then the shell 1 can be driven by the continuous oil pipe to move to the next crack 002 that needs to be temporarily blocked, and the above operation can be repeated to accurately block the next crack 002 that needs to be temporarily blocked.

[0035] When the valve 6 is suddenly opened, the temporary plugging agent in the housing 1 will enter the fixed tube 4, so the pressure in the fixed frame 7 will be reduced. At this time, the hydraulic oil may flow back into the first piston cylinder 9, causing the annular airbag 2 to shrink, resulting in the annular airbag 2 being unable to achieve a good plugging effect. Therefore, a locking component is designed; Figure 5 and Figure 6 As shown, the locking assembly includes a protection tube 17, a fixing rod 18, a guide cylinder 19, a lifting rod 20, a second piston plate 21, a compression spring 22 and a clamping block 23. The inner wall of the fixing frame 7 is connected to the protection tube 17, and the left side of the first piston plate 10 is connected to the fixing rod 18, and the fixing rod 18 is located in the protection tube 17. The bottom of the fixing rod 18 is evenly spaced with clamping grooves 1801. The left side of the inner wall of the clamping groove 1801 is an inclined surface, and the right side of the inner wall of the clamping groove 1801 is a vertical plane. The bottom of the protection tube 17 is connected to the fixing rod 18. A guide cylinder 19 is connected to the right side of the lifting rod 20, and a lifting rod 20 is slidably connected to the upper part of the guide cylinder 19. A second piston plate 21 is connected to the lower end of the lifting rod 20. The second piston plate 21 is in contact with the inner wall of the guide cylinder 19. A compression spring 22 is wound around the outside of the lifting rod 20, and the two ends of the compression spring 22 are respectively connected to the second piston plate 21 and the guide cylinder 19. Two clamping blocks 23 are symmetrically connected to the upper end of the lifting rod 20. The left side surface of the clamping block 23 is an inclined surface, and the right side surface of the clamping block 23 is a vertical plane.

[0036] When the temporary plugging agent in the fixed frame 7 becomes more and more, the temporary plugging agent will first push the second piston plate 21 to move upward, the compression spring 22 is compressed, and the second piston plate 21 can drive the lifting rod 20 and the block 23 to move upward, so that the block 23 is stuck in the groove 1801 of the fixed rod 18; then the temporary plugging agent in the fixed frame 7 will squeeze the first piston plate 10 to gradually move to the right, and the first piston plate 10 can drive the fixed rod 18 to move to the right. At this time, the inclined surface in the groove 1801 will contact the inclined surface of the block 23, so that the block 23 can be squeezed to move downward, so that the block 23 will not affect the rightward movement of the fixed rod 18, and then the block 23 will be stuck in the next groove 1801 of the fixed rod 18; until the valve 6 When opened, the vertical plane in the slot 1801 will contact the vertical plane of the block 23, thereby locking the fixing rod 18 and the first piston plate 10, preventing the fixing rod 18 and the first piston plate 10 from moving to the left and resetting, thereby ensuring that the annular airbag 2 will not shrink, so that the annular airbag 2 can achieve a good blocking effect; when the coiled tubing no longer injects the temporary plugging agent into the housing 1, the pressure in the fixing frame 7 will return to normal, and the compression spring 22 will return to its original state, driving the lifting rod 20, the second piston plate 21 and the block 23 to move downward and reset, so that the block 23 is separated from the slot 1801, thereby automatically releasing the lock on the fixing rod 18 and the first piston plate 10.

[0037] like Figure 7 and Figure 8 As shown, it also includes a mounting block 24 and a roller 25. Four mounting blocks 24 are circumferentially connected to the left and right sides of the shell 1. Each mounting block 24 is rotatably connected to a roller 25. In the horizontal direction, the outer edge of the roller 25 protrudes from the outer wall of the shell 1; it also includes a connecting column 26 and a conical block 27. The connecting column 26 is connected to the right side of the shell 1, and the conical block 27 is connected to the right side of the connecting column 26. The outer wall of the conical block 27 is an arc surface, and the edge of the right side of the conical block 27 is also an arc surface; it also includes a one-way valve 28. A one-way valve 28 is installed on each delivery pipe 5.

[0038] When the continuous oil pipe drives the outer shell 1 to move in the well 001, the roller 25 can roll on the inner wall of the well 001, which can prevent the outer shell 1 from directly contacting the inner wall of the well 001, reduce friction, assist the outer shell 1 to move more smoothly in the well 001, and prevent the outer shell 1 from being worn. The arc surface design of the conical block 27 can also prevent the outer shell 1 from getting stuck when moving in the well 001; the design of the one-way valve 28 can prevent the temporary plugging agent in the well 001 from flowing back into the delivery pipe 5, thereby ensuring the temporary plugging effect on the crack 002.

[0039] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing, Its characteristics are: The invention comprises a shell (1), an annular airbag (2), a connecting pipe (201), a mounting plate (3), a fixing pipe (4), a delivery pipe (5), a valve (6), a control component and an opening and closing component. Two annular airbags (2) are symmetrically mounted on the shell (1), and a connecting pipe (201) is connected between the two annular airbags (2). The mounting plate (3) is connected to the inner wall of the shell (1), the fixing pipe (4) is connected to the mounting plate (3), the delivery pipe (5) is symmetrically connected to the fixing pipe (4), and the valve (6) is mounted on the fixing pipe (4). The control component is used to control the annular airbag (2) to expand or contract, and the opening and closing component is used to control the valve (6) to open or close.

2. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 1, Its characteristics are: The control component comprises a fixed frame (7), an arc tube (8), a first piston cylinder (9), a first piston plate (10), a return spring (11) and an oil injection pipe (12); the fixed frame (7) is connected to the inner wall of the housing (1); the arc tube (8) is connected to the fixed frame (7) and the mounting plate (3); the first piston cylinder (9) is connected to the fixed frame (7); the first piston plate (10) is slidably connected in the first piston cylinder (9); the return spring (11) is connected to the first piston cylinder (9) and the first piston plate (10); and the oil injection pipe (12) is connected to the first piston cylinder (9) and one of the annular air bags (2).

3. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 2, Its characteristics are: The opening and closing assembly comprises a second piston cylinder (13), a shunt pipe (14), a piston rod (15) and a connecting spring (16); the second piston cylinder (13) is connected to a fixed pipe (4); the shunt pipe (14) communicates with the second piston cylinder (13) and a connecting pipe (201); the piston rod (15) is slidably connected to the second piston cylinder (13); and the end of the piston rod (15) is hinged to a valve stem (601) of a valve (6); and the connecting spring (16) connects the piston rod (15) and the second piston cylinder (13).

4. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 3, Its characteristics are: The invention also comprises a locking assembly, which comprises a protection tube (17), a fixing rod (18), a guide cylinder (19), a lifting rod (20), a second piston plate (21), a compression spring (22) and a clamping block (23). The protection tube (17) is connected to the fixing frame (7). The fixing rod (18) is connected to the side of the first piston plate (10), and the fixing rod (18) is located in the protection tube (17). A clamping groove (1801) is spaced apart at the bottom of the fixing rod (18). The guide cylinder (19) is connected to the protection tube (17). The lifting rod (20) is slidably connected to the guide cylinder (19). The second piston plate (21) is connected to one end of the lifting rod (20), and the second piston plate (21) is in contact with the inner wall of the guide cylinder (19). The compression spring (22) connects the second piston plate (21) and the guide cylinder (19). The clamping block (23) is symmetrically connected to the other end of the lifting rod (20).

5. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 4, Its characteristics are: It also includes a mounting block (24) and a roller (25), wherein the mounting block (24) is symmetrically connected to the housing (1), and the roller (25) is rotatably connected to the mounting block (24).

6. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 5, Its characteristics are: It also includes a connecting column (26) and a tapered block (27), wherein the connecting column (26) is connected to the side of the housing (1), and the tapered block (27) is connected to the side of the connecting column (26).

7. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 6, Its characteristics are: The edge of one side of the conical block (27) away from the housing (1) is a curved surface.

8. A temporary plugging agent feeder for staged plugging of horizontal well acid fracturing as claimed in claim 7, Its characteristics are: It also includes a one-way valve (28), which is installed on the delivery pipe (5).

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