Packing tools for small diameter oil wells

Abstract

The present invention discloses a filling tool suitable for small-diameter oil wells, and relates to the technical field of oil well filling tools. It comprises a filling pipe, wherein a down-pressing assembly is provided inside the outer wall of the filling pipe, and a plurality of stabilizing rings are provided on the down-pressing assembly, and the plurality of stabilizing rings are used to stably position the filling pipe inside the oil well; a stabilizing groove is provided on the outer side surface of the filling pipe, and a positioning assembly arranged in an annular manner is provided inside the stabilizing groove; an auxiliary assembly is provided inside the outer wall of the filling pipe and below the down-pressing assembly, and the stability of the filling pipe in the oil well is improved by the auxiliary assembly, and the down-pressing assembly includes a driving groove provided inside the outer wall of the filling pipe. This invention ensures the fixation, stability and sealing of the filling pipe in the oil well through the coordinated use of the down-pressing assembly, the positioning assembly and the auxiliary assembly, avoids loosening and leakage during the filling process, and improves the overall performance and safety of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of well filling tools, in particular to a filling tool suitable for small-diameter oil wells. Background Art

[0002] Oil well packing tools are used during oil and gas production, particularly during well repair, restart, shutdown, or wellhead sealing operations, to help seal the well, control fluid flow within the well, and prevent foreign matter from entering the well. These tools are typically used to seal off different parts of an oil and gas well, such as the wellhead, reservoir, and casing, to ensure the safety and effectiveness of the operation.

[0003] In the prior art, a Chinese patent with authorization announcement number CN218030156U discloses a filling tool suitable for small-diameter oil wells. The tool connects a coupling to a screen pipe and lowers the device into the casing according to downhole operation procedures until the designed depth is reached. After reaching the designed depth, the valve ball is put into the oil pipe so that the valve ball is seated on the valve ball sealing surface of the ball seat. The tool is pressurized. As the pressure increases, the first shear pin is sheared off, the ball seat moves down and contacts the seat sleeve. At this time, the inner filling hole is facing the outer filling hole, the filling channel is opened, and the filling operation is carried out. After the filling operation is completed, the tool is pressurized again to shear off the second shear pin, and the ball seat and the seat sleeve move down together until the lower end of the seat sleeve contacts the inner step seat. At this time, the upper part of the ball seat closes the inner end of the outer filling hole, and the filling channel is closed, which solves the problem that the filling valve of the existing filling tool is not tightly closed and fine sand leaks after the filling is completed.

[0004] As in the scheme described above, by using the cooperation of the first shear pin and the second shear pin, the filling operation can be completed quickly without lifting or lowering the tubing string or inserting other tools. However, in this scheme, since the filling tube needs to be placed inside the oil well, the volume of the filling tube is smaller than the oil well, and it is easy to deviate or shake inside the oil well. If its stability cannot be maintained, it will lead to uneven contact between the filling tube and the inner wall of the oil well during the filling process, thereby affecting the filling effect, and may even cause incomplete filling or equipment failure. Although some existing filling tools can be installed with corresponding positioning mechanisms on the filling tube, the positioning mechanism cannot make different positions of the filling tube fit with the inner wall of the oil well. In this way, the stability of the filling tube in the oil well cannot be guaranteed, which will affect the filling effect of the filling tube. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a filling tool suitable for small-diameter oil wells, which solves the problems mentioned in the above background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A filling tool suitable for small-diameter oil wells includes a filling pipe, a down-holding assembly is provided inside the outer wall of the filling pipe, and a plurality of stabilizing rings are provided on the down-holding assembly. The plurality of stabilizing rings are used to stably position the filling pipe inside the oil well.

[0008] The outer side of the filling tube is provided with a stabilizing groove, and the interior of the stabilizing groove is provided with an annularly arranged positioning assembly;

[0009] An auxiliary component is provided inside the outer wall of the filling pipe and below the pressing component, and the auxiliary component improves the stability of the filling pipe in the oil well;

[0010] The downward pressure assembly includes a driving groove opened inside the outer wall of the filling tube, an electric push rod is fixedly installed inside the driving groove, a downward pressure rod is fixedly installed at the output end of the electric push rod, a U-shaped rod is fixedly installed at the bottom end of the downward pressure rod, and an extrusion block is opened on the inner side surface of the U-shaped rod.

[0011] Preferably, an installation groove is provided inside the outer wall of the filling tube and below the driving groove, a limiting slide groove is provided inside the installation groove, a limiting slider is slidably installed inside the limiting slide groove, a return spring is fixedly connected to the limiting slider, and a first receiving groove is provided on the outer side surface of the filling tube.

[0012] Preferably, the U-shaped rod is slidably installed inside the mounting groove, the first receiving groove is connected to the mounting groove, the stabilizing ring is fixedly installed on the limiting slider, the stabilizing ring is slidably installed with the first receiving groove, and the end of the return spring away from the limiting slider is fixedly connected to the inside of the limiting slide groove.

[0013] Preferably, the positioning assembly includes a pushing rod fixedly mounted on the U-shaped rod, a lower pressure ring fixedly mounted on the bottom end of the pushing rod, an upper connecting frame fixedly mounted on the lower end surface of the lower pressure ring, an upper connecting frame is provided on the upper connecting frame, a first rotating shaft is rotatably mounted inside the upper connecting groove, an active rotating rod is fixedly mounted on the first rotating shaft, a lower connecting frame is fixedly mounted on the inner bottom of the stabilizing groove, a lower connecting frame is provided inside the lower connecting frame, a second rotating shaft is rotatably mounted inside the lower connecting groove, and a driven rotating rod is fixedly mounted on the second rotating shaft.

[0014] Preferably, the other ends of the active rotating rod and the driven rotating rod are fixedly installed with a connecting shaft, a stabilizing block is provided between the active rotating rod and the driven rotating rod, both ends of the stabilizing block are provided with a middle connecting groove, and the side end surface of the stabilizing block is fixedly installed with a stabilizing arc block.

[0015] Preferably, the active rotating rod and the driven rotating rod are in the same vertical direction, the active rotating rod and the driven rotating rod are both arranged obliquely, and the active rotating rod and the driven rotating rod are both rotatably installed through the connecting shaft and the middle connecting groove.

[0016] Preferably, the auxiliary component includes a concentrated airbag fixedly installed at the bottom of the installation groove, the concentrated airbag is fixedly connected to a connecting pipe, and the connecting pipe is fixedly connected to an extrusion airbag at one end away from the concentrated airbag.

[0017] Preferably, a connecting rod is fixedly mounted on the lower end surface of the U-shaped rod, an extrusion ring is fixedly mounted on the bottom end of the connecting rod, and a second receiving groove is provided on the side end surface of the filling tube.

[0018] Preferably, the connecting tube extends to the inside of the second receiving groove at one end away from the concentrated airbag, the extrusion ring is slidably installed inside the installation groove, and the extrusion ring is above the concentrated airbag, and the extrusion airbag is inside the second receiving groove.

[0019] The present invention provides a filling tool suitable for small-diameter oil wells. Compared with the prior art, it has the following advantages:

[0020] 1. In the present invention, after the filling pipe enters the oil well, the electric push rod drives the lower pressure rod to descend, and the U-shaped rod on the lower pressure rod passes through the limit of the installation groove and moves downward at the same time. The extrusion block on the U-shaped rod squeezes and pushes the stabilizing ring, and the stabilizing ring slides within the limit sliding groove through the limit slider, thereby extending from the first receiving groove. The stabilizing ring is in contact with the inner wall of the oil well, thereby ensuring that the filling pipe maintains a stable and firm position in the oil well, preventing any unnecessary movement or loosening, and ensuring that the filling process proceeds smoothly.

[0021] 2. In the present invention, when the U-shaped rod is descending, it will synchronously drive the push rod to descend synchronously. The lower pressure ring on the push rod will drive the upper connecting frame to descend. When the upper connecting frame is descending, it will drive the active rotating rod to descend synchronously through the first rotating shaft. At the same time, the stabilizing block on the active rotating rod will cooperate with the driven rotating rod and the lower connecting frame to achieve outward movement. The stabilizing arc block on the stabilizing block fits with the inner wall of the oil well, so that the filling pipe is further fixed on the basis of the stabilizing ring.

[0022] 3. In the present invention, when the U-shaped rod descends, it drives the extrusion ring to move vertically downward in the installation groove through the connecting rod. During the descent, the extrusion ring squeezes the concentrated airbag. The gas in the concentrated airbag enters the extrusion airbag through the connecting pipe. The extrusion airbag in the second receiving groove expands due to the filling of gas. The expanded extrusion airbag adheres to the inner wall of the oil well, achieving a supporting and sealing effect on the inner wall of the oil well, ensuring the stability and sealing performance of the filling pipe during operation.

[0023] 4. The present invention ensures the fixation, stability and sealing of the filling pipe in the oil well through the coordinated use of the pressing component, the positioning component and the auxiliary component, avoids loosening and leakage during the filling process, and improves the overall performance and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 Schematic diagram of the structure of the stabilizing tank in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the downward pressure component in the present invention;

[0029] Figure 6 Schematic diagram of the structure of the U-shaped rod in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the positioning component in the present invention;

[0031] Figure 8 Schematic diagram of the structure of the auxiliary components in the present invention;

[0032] Figure 9 It is a cross-sectional view of the stabilizing block in the present invention.

[0033] In the figure: 1. Filling tube; 2. Stabilizing ring; 3. Stabilizing groove; 4. Driving groove; 5. Electric push rod; 6. Pressing rod; 7. U-shaped rod; 8. Extrusion block; 9. Mounting groove; 10. Limiting slide groove; 11. Limiting slider; 12. Return spring; 13. First receiving groove; 14. Push rod; 15. Pressing ring; 16. Upper connecting frame; 17. Upper connecting groove; 18. First rotating shaft; 19. Active rotating rod; 20. Lower connecting frame; 21. Lower connecting groove; 22. Second rotating shaft; 23. Driven rotating rod; 24. Connecting shaft; 25. Stabilizing block; 26. Middle connecting groove; 27. Stabilizing arc block; 28. Central airbag; 29. ​​Connecting pipe; 30. Extrusion airbag; 31. Connecting rod; 32. Extrusion ring; 33. Second receiving groove. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1-9 The present invention is a filling tool suitable for small-diameter oil wells, comprising a filling tube 1, a pressing assembly provided inside the outer wall of the filling tube 1, and a plurality of stabilizing rings 2 provided on the pressing assembly. The plurality of stabilizing rings 2 are used to stably position the filling tube 1 inside the oil well, wherein an external filling port is provided on the filling tube 1. Since this technology is well known to those skilled in the art, a detailed description thereof will not be given here.

[0036] The pressing component includes a driving groove 4 provided inside the outer wall of the filling tube 1, an electric push rod 5 is fixedly installed inside the driving groove 4, a pressing rod 6 is fixedly installed on the output end of the electric push rod 5, a U-shaped rod 7 is fixedly installed on the bottom end of the pressing rod 6, an extrusion block 8 is provided on the inner side of the U-shaped rod 7, a mounting groove 9 is provided inside the outer wall of the filling tube 1 and below the driving groove 4, a limiting slide groove 10 is provided inside the mounting groove 9, a limiting slider 11 is slidably installed inside the limiting slide groove 10, a reset spring 12 is fixedly connected to the limiting slider 11, a first receiving groove 13 is provided on the outer side of the filling tube 1, and the U-shaped rod 7 is slidably installed Inside the mounting groove 9, the first receiving groove 13 is connected with the mounting groove 9, the stabilizing ring 2 is fixedly mounted on the limiting slider 11, the stabilizing ring 2 is slidably mounted with the first receiving groove 13, and the end of the return spring 12 away from the limiting slider 11 is fixedly connected to the inside of the limiting slide groove 10. When the electric push rod 5 drives the lower pressure rod 6 to rise, the extrusion block 8 on the U-shaped rod 7 will not continue to squeeze and push the stabilizing ring 2. The stabilizing ring 2 will return to its original position through the reaction force of the return spring 12, and the limiting slider 11 is used to slide in the limiting slide groove 10 to ensure that the stabilizing ring 2 will not fall off when sliding in the first receiving groove 13.

[0037] In this embodiment, after the filling pipe 1 enters the oil well, the electric push rod 5 drives the lower pressure rod 6 to descend, and the U-shaped rod 7 on the lower pressure rod 6 will pass through the limit of the installation groove 9 and move downward at the same time. The extrusion block 8 on the U-shaped rod 7 will squeeze and push the stabilizing ring 2, and the stabilizing ring 2 will slide in the limit slide groove 10 through the limit slider 11, thereby extending from the first receiving groove 13, and the stabilizing ring 2 is in contact with the inner wall of the oil well to ensure that the filling pipe 1 maintains a stable and firm position in the oil well, preventing any unnecessary movement or loosening, and ensuring that the filling process proceeds smoothly.

[0038] The outer side of the filling tube 1 is provided with a stable groove 3, and the interior of the stable groove 3 is provided with a ring-shaped positioning assembly, which includes a push rod 14 fixedly mounted on the U-shaped rod 7, and a lower pressure ring 15 is fixedly mounted on the bottom end of the push rod 14. The lower end surface of the lower pressure ring 15 is fixedly mounted with an upper connecting frame 16, and an upper connecting groove 17 is provided on the upper connecting frame 16. A first rotating shaft 18 is rotatably mounted inside the upper connecting groove 17, and an active rotating rod 19 is fixedly mounted on the first rotating shaft 18. A lower connecting frame 20 is fixedly mounted on the inner bottom of the stable groove 3, and a lower connecting frame 20 is provided with a lower connecting groove 21. A second rotating shaft 22 is rotatably mounted inside the lower connecting groove 21, and a second rotating shaft 22 is fixed on the second rotating shaft 22. A driven rotating rod 23 is installed, and the other ends of the active rotating rod 19 and the driven rotating rod 23 are fixedly installed with a connecting shaft 24. A stabilizing block 25 is provided between the active rotating rod 19 and the driven rotating rod 23. Both ends of the stabilizing block 25 are provided with a middle connecting groove 26. The side end surface of the stabilizing block 25 is fixedly installed with a stabilizing arc block 27. The active rotating rod 19 and the driven rotating rod 23 are in the same vertical direction. The active rotating rod 19 and the driven rotating rod 23 are both inclined. The active rotating rod 19 and the driven rotating rod 23 are rotatably installed by connecting the rotating shaft 24 and the middle connecting groove 26. The lower pressure ring 15 is slidably installed with the surface of the filling pipe 1 to ensure that the lower pressure ring 15 is in a stable state when lifting.

[0039] In this embodiment, when the U-shaped rod 7 is descending, it will synchronously drive the push rod 14 to descend synchronously, and the lower pressure ring 15 on the push rod 14 will drive the upper connecting frame 16 to descend. When the upper connecting frame 16 is descending, it will drive the active rotating rod 19 to descend synchronously through the first rotating shaft 18. At the same time, the stabilizing block 25 on the active rotating rod 19 will cooperate with the lower connecting frame 20 through the driven rotating rod 23 to achieve outward movement. The stabilizing arc block 27 on the stabilizing block 25 fits with the inner wall of the oil well, so that the filling pipe 1 is further fixed on the basis of the stabilizing ring 2.

[0040] An auxiliary component is provided inside the outer wall of the filling tube 1 and below the downward pressure component, which improves the stability of the filling tube 1 in the oil well. The auxiliary component includes a concentrated air bag 28 fixedly installed at the bottom of the mounting groove 9, and a connecting pipe 29 is fixedly connected to the concentrated air bag 28. The end of the connecting pipe 29 away from the concentrated air bag 28 is fixedly connected to the extrusion air bag 30. A connecting rod 31 is fixedly installed on the lower end face of the U-shaped rod 7, and an extrusion ring 32 is fixedly installed on the bottom end face of the connecting rod 31. A second receiving groove 33 is provided on the side end face of the filling tube 1, and the end of the connecting pipe 29 away from the concentrated air bag 28 extends to the inside of the second receiving groove 33. The extrusion ring 32 is slidably installed inside the mounting groove 9, and the extrusion ring 32 is above the concentrated air bag 28, and the extrusion air bag 30 is inside the second receiving groove 33. The shape of the second receiving groove 33 is annular, ensuring that the ring-shaped extrusion air bag 30 can be received by the second receiving groove 33.

[0041] In this embodiment, when the U-shaped rod 7 is descending, it will drive the extrusion ring 32 to move vertically downward in the installation groove 9 through the connecting rod 31. The extrusion ring 32 will squeeze the concentrated airbag 28 during the descent. The gas in the concentrated airbag 28 will enter the extrusion airbag 30 through the connecting tube 29. The extrusion airbag 30 in the second receiving groove 33 will expand due to the filling of gas. The expanded extrusion airbag 30 will fit with the inner wall of the oil well, thereby achieving a supporting and sealing effect on the inner wall of the oil well, ensuring the stability and sealing performance of the filling tube 1 during operation.

[0042] Working principle: When in use, after the filling pipe 1 enters the oil well, the electric push rod 5 drives the pressing rod 6 to descend, and the U-shaped rod 7 on the pressing rod 6 passes through the limit of the installation groove 9 and moves downward at the same time. The squeezing block 8 on the U-shaped rod 7 squeezes and pushes the stabilizing ring 2, and the stabilizing ring 2 slides within the limit sliding groove 10 through the limit slider 11, thereby extending from the first receiving groove 13. The stabilizing ring 2 is in contact with the inner wall of the oil well, thereby ensuring that the filling pipe 1 maintains a stable and firm position in the oil well.

[0043] When the U-shaped rod 7 is in the process of descending, it will synchronously drive the push rod 14 to descend synchronously, and the lower pressure ring 15 on the push rod 14 will drive the upper connecting frame 16 to descend. When the upper connecting frame 16 is in the process of descending, it will drive the active rotating rod 19 to descend synchronously through the first rotating shaft 18. At the same time, the stabilizing block 25 on the active rotating rod 19 will cooperate with the lower connecting frame 20 through the driven rotating rod 23 to achieve the movement to the outside. The stabilizing arc block 27 on the stabilizing block 25 fits with the inner wall of the oil well, so that the filling pipe 1 is further fixed on the basis of the stabilizing ring 2.

[0044] When the U-shaped rod 7 is descending, it will drive the extrusion ring 32 to move vertically downward in the installation groove 9 through the connecting rod 31. The extrusion ring 32 will squeeze the concentrated airbag 28 during the descent. The gas in the concentrated airbag 28 will enter the extrusion airbag 30 through the connecting pipe 29. The extrusion airbag 30 in the second receiving groove 33 will expand due to the filling of gas. The expanded extrusion airbag 30 will fit with the inner wall of the oil well, thereby achieving a supporting and sealing effect on the inner wall of the oil well, ensuring the stability and sealing performance of the filling tube 1 during operation.

[0045] In this technical solution, the down-press rod 6, the U-shaped rod 7 and the push rod 14 are cast as one piece, and the extrusion airbag 30 is made of a polyamide fabric with excellent crack-proof performance, ensuring that after the extrusion airbag 30 is expanded, when the inner wall of the oil well fits with the extrusion airbag 30, the inner wall of the oil well will not cause damage to the extrusion airbag 30.

[0046] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A filling tool suitable for small diameter oil wells, comprising a filling pipe (1), characterized in that: A pressing assembly is provided inside the outer wall of the filling pipe (1), and a plurality of stabilizing rings (2) are provided on the pressing assembly. The filling pipe (1) is stably positioned inside the oil well by utilizing the plurality of stabilizing rings (2); The outer side surface of the filling tube (1) is provided with a stabilizing groove (3), and an annular positioning assembly is provided inside the stabilizing groove (3). The positioning assembly includes a push rod (14) fixedly mounted on the U-shaped rod (7), and a lower pressure ring (15) is fixedly mounted on the bottom end of the push rod (14); An auxiliary component is provided inside the outer wall of the filling pipe (1) and below the pressing component, and the auxiliary component is used to improve the stability of the filling pipe (1) in the oil well; The pressing assembly comprises a driving groove (4) provided inside the outer wall of the filling tube (1), an electric push rod (5) is fixedly installed inside the driving groove (4), a pressing rod (6) is fixedly installed at the output end of the electric push rod (5), a U-shaped rod (7) is fixedly installed at the bottom end of the pressing rod (6), and an extrusion block (8) is provided on the inner side surface of the U-shaped rod (7); A connecting rod (31) is fixedly mounted on the lower end surface of the U-shaped rod (7), and an extrusion ring (32) is fixedly mounted on the bottom end of the connecting rod (31).

2. The filling tool for small diameter oil wells according to claim 1, characterized in that: An installation groove (9) is provided inside the outer wall of the filling tube (1) and below the driving groove (4), a limiting slide groove (10) is provided inside the installation groove (9), a limiting slider (11) is slidably installed inside the limiting slide groove (10), a return spring (12) is fixedly connected to the limiting slider (11), and a first receiving groove (13) is provided on the outer side surface of the filling tube (1).

3. The filling tool for small diameter oil wells according to claim 2, characterized in that: The U-shaped rod (7) is slidably mounted inside the mounting groove (9), the first receiving groove (13) is communicated with the mounting groove (9), the stabilizing ring (2) is fixedly mounted on the limiting slider (11), the stabilizing ring (2) is slidably mounted with the first receiving groove (13), and the end of the return spring (12) away from the limiting slider (11) is fixedly connected to the inside of the limiting slide groove (10).

4. The filling tool for small diameter oil wells according to claim 2, characterized in that: An upper connecting frame (16) is fixedly mounted on the lower end surface of the lower pressure ring (15), an upper connecting groove (17) is provided on the upper connecting frame (16), a first rotating shaft (18) is rotatably mounted inside the upper connecting groove (17), an active rotating rod (19) is fixedly mounted on the first rotating shaft (18), a lower connecting frame (20) is fixedly mounted on the inner bottom of the stabilizing groove (3), a lower connecting frame (20) is provided with a lower connecting groove (21), a second rotating shaft (22) is rotatably mounted inside the lower connecting groove (21), and a driven rotating rod (23) is fixedly mounted on the second rotating shaft (22).

5. The filling tool for small diameter oil wells according to claim 4, characterized in that: The other ends of the active rotating rod (19) and the driven rotating rod (23) are both fixedly mounted with a connecting shaft (24), a stabilizing block (25) is provided between the active rotating rod (19) and the driven rotating rod (23), both ends of the stabilizing block (25) are provided with a middle connecting groove (26), and a stabilizing arc block (27) is fixedly mounted on the side end surface of the stabilizing block (25).

6. The filling tool for small diameter oil wells according to claim 5, characterized in that: The active rotating rod (19) and the driven rotating rod (23) are in the same vertical direction, the active rotating rod (19) and the driven rotating rod (23) are both arranged obliquely, and the active rotating rod (19) and the driven rotating rod (23) are both rotatably mounted via a connecting shaft (24) and a middle connecting groove (26).

7. The filling tool for small diameter oil wells according to claim 4, characterized in that: The auxiliary component comprises a concentrated airbag (28) fixedly mounted on the bottom of the mounting groove (9), a connecting pipe (29) fixedly connected to the concentrated airbag (28), and an end of the connecting pipe (29) away from the concentrated airbag (28) fixedly connected to an extrusion airbag (30).

8. The filling tool for small diameter oil wells according to claim 7, characterized in that: A second receiving groove (33) is provided on the side end surface of the filling tube (1).

9. The filling tool for small diameter oil wells according to claim 8, characterized in that: One end of the connecting tube (29) away from the concentrated airbag (28) extends to the inside of the second receiving groove (33), the extrusion ring (32) is slidably installed inside the mounting groove (9), and the extrusion ring (32) is located above the concentrated airbag (28), and the extrusion airbag (30) is located inside the second receiving groove (33).

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