High-temperature-resistant oil and gas drilling circumferential impact speed increasing device

Abstract

The invention relates to the technical field of drilling tools, in particular to a high-temperature-resistant oil gas drilling circumferential impact speed increasing device which comprises a connecting outer barrel, a lower connector and a circumferential impact device, the lower connector is fixedly mounted at the lower end of the connecting outer barrel, and a first partition plate, a second partition plate, a third partition plate and a fourth partition plate are sequentially and fixedly mounted on the inner side of the connecting outer barrel from top to bottom; the circumferential impact device comprises an impact driving assembly, an impact transmission assembly and an impact execution assembly, an upper mounting hole penetrating vertically is eccentrically formed in the first partition plate, and a lower mounting hole penetrating vertically is formed in the position, corresponding to the upper mounting hole, of the second partition plate. The device is reasonable and compact in structure and convenient to use, and circumferential impact of converting liquid energy into momentum is achieved through periodic reciprocating rotation of the impact hammer in the impact cylinder; by arranging the left arc-shaped groove and the right arc-shaped groove, the strokes of the left arc-shaped boss and the right arc-shaped boss are increased, and the beneficial effects of being stable, reliable and efficient are achieved.

Description

Technical Field

[0001] This invention relates to the field of drilling tool technology, and is a high-temperature resistant circumferential impact speed-up device for oil and gas drilling. Background Technology

[0002] In oilfield exploration and development, improving the rate of penetration (RLP) is a perpetual goal pursued by the oilfield development industry. Currently, numerous different types of drilling speed-up tools have been developed and put into field testing both domestically and internationally, achieving good results. Existing drilling speed-up tools mainly achieve this effect by applying impact to the drill bit. Based on the form of impact, they can be divided into axial impact speed-up devices and circumferential impact speed-up tools. Circumferential impact speed-up tools improve the working condition of PDC (Potentially Densified Controller) drill bits by applying periodic, high-frequency circumferential impact forces to the drill bit, increasing the rock-breaking efficiency of the PDC drill bit and thus improving the RLP; they also protect ODC (Optical Densified Controller) drill bits and extend their service life.

[0003] Currently, torsion impactors that employ circumferential impact typically have a multi-layered nested structure of distribution plate, impact hammer, and anvil. They achieve periodic reciprocating oscillation to provide circumferential impact force through flow channel changes. This results in a complex flow channel design for the interaction between components. Under the long-term action of drilling fluid, the flow channels between these components are eroded, thus affecting the tool's service life. Summary of the Invention

[0004] This invention provides a high-temperature resistant circumferential impact acceleration device for oil and gas drilling, which overcomes the shortcomings of the prior art and can effectively solve the problem of complex flow channel design and easy erosion of existing torsion impactors.

[0005] The technical solution of this invention is achieved through the following measures: A high-temperature resistant oil and gas drilling circumferential impact acceleration device includes a connecting outer cylinder, a lower connector, and a circumferential impact device. A lower connector is fixedly installed at the lower end of the connecting outer cylinder. A first partition, a second partition, a third partition, and a fourth partition are sequentially fixedly installed on the inner side of the connecting outer cylinder from top to bottom. The circumferential impact device includes an impact drive assembly, an impact transmission assembly, and an impact execution assembly. An upper mounting hole is eccentrically provided on the first partition, and a lower mounting hole is provided on the second partition corresponding to the position of the upper mounting hole. The distance between the first partition and the second partition... The connecting outer cylinder at the intermediate position is equipped with an impact drive assembly that can be rotated by hydraulic power. The upper and lower ends of the impact drive assembly are respectively installed in the upper mounting hole and the lower mounting hole. The first partition corresponding to the position of the impact drive assembly is equipped with a jet hole. The connecting outer cylinder corresponding to the position between the third and fourth partitions is equipped with an impact actuator that can provide circumferential impact force. The connecting outer cylinder corresponding to the position between the second and third partitions is equipped with an impact transmission assembly that can make the impact actuator rotate periodically with the impact drive assembly. The second partition is equipped with an upper flow hole, and the third partition is equipped with a lower flow hole.

[0006] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned impact drive assembly may include a rotating shaft, a drive impeller, an upper bearing, and a lower bearing. The upper part of the rotating shaft is located in the upper mounting hole, and the lower part of the rotating shaft is located in the lower mounting hole. A mounting ring platform is provided on the outer side of the middle part of the rotating shaft. The drive impeller is fixedly mounted on the outer side of the mounting ring platform. An upper bearing is provided on the outer side of the rotating shaft corresponding to the position between the first partition and the mounting ring platform, and a lower bearing is provided on the outer side of the rotating shaft corresponding to the position between the mounting ring platform and the second partition.

[0007] The aforementioned impact transmission assembly may include a drive gear, a driven gear, and a transmission cylinder. The lower end of the rotating shaft is located below the second partition plate. A drive gear is fixedly installed on the outer side of the lower end of the rotating shaft. The drive gear is an incomplete gear. A transmission cylinder is provided on the outer side of the drive gear. A driven gear is provided on the inner side of the transmission cylinder. The inner side of the driven gear meshes with the outer side of the drive gear at the corresponding position. The upper end of the impact execution assembly is connected to the central transmission on the lower side of the transmission cylinder.

[0008] The aforementioned impact actuator may include a central tube, an impact hammer, an impact cylinder, a connecting neck, an upper return spring, and a lower return spring. A central tube, whose upper end is connected to the central lower side of the transmission cylinder, is fixedly mounted on the inner side of the upper end of the impact hammer. A left arc-shaped boss is provided on the outer left side of the impact hammer, and a right arc-shaped boss is provided on the outer right side of the impact hammer. An impact cylinder, located below the impact hammer, is fitted onto the outer side of the impact hammer. A left arc-shaped groove, allowing the left hammer to swing within the inner upper part of the impact cylinder corresponding to the position of the left arc-shaped boss, and a right arc-shaped groove, allowing the right hammer to swing within the inner upper part of the impact cylinder corresponding to the position of the right arc-shaped boss, are provided on the inner upper upper part of the impact cylinder. A connecting neck, with its lower end located within the lower connector, is fixedly mounted on the lower side of the impact cylinder. An upper return spring is installed on the outer side of the central tube corresponding to the position between the third partition and the impact hammer, and a lower return spring is installed on the outer side of the connecting neck corresponding to the position between the impact cylinder and the fourth partition. The impact hammer has several internally and externally penetrating flow holes on its outer side, and the impact cylinder has several externally and internally penetrating flow holes on its outer side.

[0009] The impact hammer may be provided with an upper slot on its upper side, the upper end of the upper return spring is fixedly installed together with the third partition, and the lower end of the upper return spring is limited and installed in the upper slot; the impact cylinder is provided with a lower slot on its lower side, the upper end of the lower return spring is limited and installed in the lower slot, and the lower end of the lower return spring is fixedly installed together with the fourth partition.

[0010] The above may also include a left straightening protrusion and a right straightening protrusion, with the left arc-shaped protrusion having a left straightening protrusion in the middle of the left side and the right arc-shaped protrusion having a right straightening protrusion in the middle of the right side.

[0011] The lower inner side of the aforementioned impact cylinder may be provided with a support ring platform, and the upper inner side of the support ring platform is provided with a support ring groove. The lower sides of the left arc-shaped boss and the right arc-shaped boss are both seated on the upper side of the support ring platform, and the lower end of the impact hammer is seated in the support ring groove.

[0012] The present invention has a reasonable and compact structure and is easy to use. It realizes the circumferential impact by converting liquid energy into momentum through the periodic reciprocating rotation of the impact hammer in the impact cylinder. By setting the left and right arc grooves, the stroke of the left and right arc bosses is increased, which has the characteristics of stability, reliability and high efficiency. Attached Figure Description

[0013] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments 1 to 7 of the present invention.

[0014] Appendix Figure 2 For the appendix Figure 1 Enlarged structural schematic diagram of the main view section of the connecting outer cylinder.

[0015] Appendix Figure 3 For the appendix Figure 1 A top-view enlarged cross-sectional schematic diagram of the impact transmission component.

[0016] Appendix Figure 4 For the appendix Figure 1 A three-dimensional structural diagram of a medium-sized impact hammer.

[0017] Appendix Figure 5 For the appendix Figure 1 A three-dimensional structural diagram of the impact cylinder.

[0018] The codes in the attached diagram are as follows: 1 is the connecting outer cylinder, 2 is the lower connector, 3 is the first partition, 4 is the second partition, 5 is the third partition, 6 is the fourth partition, 7 is the rotating shaft, 8 is the drive impeller, 9 is the upper bearing, 10 is the lower bearing, 11 is the drive gear, 12 is the driven gear, 13 is the transmission cylinder, 14 is the central tube, 15 is the impact hammer, 16 is the impact cylinder, 17 is the connecting neck, 18 is the upper return spring, and 19 is the lower return spring. Position spring, 20 is upper slot, 21 is left arc-shaped boss, 22 is right arc-shaped boss, 23 is left straightening boss, 24 is right straightening boss, 25 is jet hole, 26 is upper mounting hole, 27 is lower mounting hole, 28 is upper flow hole, 29 is lower flow hole, 30 is inner flow hole, 31 is outer flow hole, 32 is mounting ring platform, 33 is support ring platform, 34 is support ring groove, 35 is left arc-shaped groove, 36 is right arc-shaped groove. Detailed Implementation

[0019] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0020] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0021] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2 As shown in Figures 3, 4, and 5, the high-temperature resistant oil and gas drilling circumferential impact acceleration device includes a connecting outer cylinder 1, a lower connector 2, and a circumferential impact device. The lower connector 2 is fixedly installed at the lower end of the connecting outer cylinder 1. A first partition 3, a second partition 4, a third partition 5, and a fourth partition 6 are fixedly installed sequentially from top to bottom on the inner side of the connecting outer cylinder 1. The circumferential impact device includes an impact drive assembly, an impact transmission assembly, and an impact execution assembly. An upper mounting hole 26 is eccentrically provided on the first partition 3, and a lower mounting hole 27 is provided on the second partition 4 corresponding to the position of the upper mounting hole 26. The connection between the first partition 3 and the second partition 4 is... The outer cylinder 1 houses an impact drive assembly capable of hydraulic rotation. The upper and lower ends of the impact drive assembly are respectively installed in the upper mounting hole 26 and the lower mounting hole 27. A jet hole 25 is provided on the first partition 3 corresponding to the position of the impact drive assembly. An impact actuator assembly capable of providing circumferential impact force is located within the connecting outer cylinder 1 between the third partition 5 and the fourth partition 6. An impact transmission assembly capable of causing the impact actuator assembly to periodically reciprocate with the impact drive assembly is located within the connecting outer cylinder 1 between the second partition 4 and the third partition 5. An upper flow hole 28 is provided on the second partition 4, and a lower flow hole 29 is provided on the third partition 5. During operation, drilling fluid enters the connecting outer cylinder 1 and flows under pressure through the jet hole 25 into the area between the first partition 3 and the second partition 4, causing the impact drive assembly to rotate. This rotation of the impact drive assembly, through the impact transmission assembly, causes the impact actuator assembly to periodically reciprocate, thereby achieving circumferential impact acceleration of the drill bit.

[0022] The above-mentioned high-temperature resistant oil and gas drilling circumferential impact acceleration device can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 , 2As shown, the impact drive assembly includes a rotating shaft 7, a drive impeller 8, an upper bearing 9, and a lower bearing 10. The upper part of the rotating shaft 7 is located in the upper mounting hole 26, and the lower part of the rotating shaft 7 is located in the lower mounting hole 27. A mounting ring platform 32 is provided on the outer side of the middle part of the rotating shaft 7. The drive impeller 8 is fixedly mounted on the outer side of the mounting ring platform 32. The upper bearing 9 is provided on the outer side of the rotating shaft 7 corresponding to the position between the first partition 3 and the mounting ring platform 32, and the lower bearing 10 is provided on the outer side of the rotating shaft 7 corresponding to the position between the mounting ring platform 32 and the second partition 4. During use, by setting the hydraulically driven drive impeller 8, the rotation of the impact actuator is realized, applying periodic high-frequency circumferential impact force to the drill bit to improve the working condition of the PDC drill bit, increase the rock breaking efficiency of the PDC drill bit, and thus increase the mechanical drilling speed. At the same time, it also protects the ODC drill bit, extends the service life of the drill bit, and avoids the use of complex flow channels.

[0023] Example 3: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the impact transmission assembly includes a drive gear 11, a driven gear 12, and a transmission cylinder 13. The lower end of the rotating shaft 7 is located below the second partition 4. The drive gear 11 is fixedly installed on the outer side of the lower end of the rotating shaft 7. The drive gear 11 is an incomplete gear. The transmission cylinder 13 is located on the outer side of the drive gear 11, and the driven gear 12 is located on the inner side of the transmission cylinder 13. The inner side of the driven gear 12 meshes with the corresponding position on the outer side of the drive gear 11. The upper end of the impact execution assembly is connected to the lower center of the transmission cylinder 13. During use, when the corresponding position on the outer side of the drive gear 11 meshes with the inner side of the driven gear 12, the impact execution assembly rotates with the impact drive assembly. When the corresponding position on the outer side of the drive gear 11 does not mesh with the inner side of the driven gear 12, the impact execution assembly does not rotate with the impact drive assembly, thereby realizing the periodic reciprocating rotation of the impact execution assembly.

[0024] Example 4: As shown in the appendix Figure 1 , 4As shown in Figure 5, the impact actuator includes a central tube 14, an impact hammer 15, an impact cylinder 16, a connecting neck 17, an upper return spring 18, and a lower return spring 19. A central tube 14, whose upper end is connected to the central lower side of the transmission cylinder 13, is fixedly mounted on the inner side of the upper end of the impact hammer 15. A left arc-shaped boss 21 is provided on the outer left side of the impact hammer 15, and a right arc-shaped boss 22 is provided on the outer right side of the impact hammer 15. An impact cylinder 16, located below the impact hammer 15, is fitted onto the outer side of the impact hammer 15. A left arc-shaped groove 3, corresponding to the position of the left arc-shaped boss 21, is provided on the inner side of the upper part of the impact cylinder 16, allowing the left hammer body to swing within it. 5. The upper inner side of the impact cylinder 16 corresponding to the position of the right arc-shaped boss 22 is provided with a right arc-shaped groove 36 that allows the right hammer to swing within it; a connecting neck 17 with its lower end located in the lower connector 2 is fixedly installed on the lower side of the impact cylinder 16; an upper return spring 18 is installed on the outer side of the central tube 14 corresponding to the position between the third partition 5 and the impact hammer 15; a lower return spring 19 is installed on the outer side of the connecting neck 17 corresponding to the position between the impact cylinder 16 and the fourth partition 6; the outer side of the impact hammer 15 is provided with several internally and externally penetrating internal flow holes 30; the outer side of the impact cylinder 16 is provided with several internally and externally penetrating external flow holes 31. During use, when the drive gear 11 and driven gear 12 are engaged, the impact hammer 15 rotates with the transmission cylinder 13 via the central tube 14, causing the left arc-shaped boss 21 to swing within the left arc-shaped groove 35 and the right arc-shaped boss 22 to swing within the right arc-shaped groove 36. This provides the drill bit connected to the lower connector 2 with circumferential impact force, improving the rock-breaking efficiency of the PDC drill bit and thus increasing the mechanical drilling speed. When the drive gear 11 and driven gear 12 are not engaged, the impact hammer 15 is held in place by the upper return spring 18 and the lower return spring 19. The reverse rotation resets the left arc-shaped boss 21, causing it to swing in the left arc-shaped groove 35 and the right arc-shaped boss 22 to swing in the right arc-shaped groove 36. This allows the drill bit connected to the lower connector 2 to obtain circumferential impact force, improving the rock-breaking efficiency of the PDC drill bit and thus increasing the mechanical drilling speed. The impact hammer 15 rotates periodically within the impact cylinder 16, converting hydraulic energy into momentum for circumferential impact. The stroke of the left arc-shaped boss 21 and the right arc-shaped boss 22 is increased by setting the left arc-shaped groove 35 and the right arc-shaped groove 36.

[0025] Example 5: As shown in the attached document Figure 4 , 5 As shown, the impact hammer 15 has an upper slot 20 on its upper side. The upper end of the upper return spring 18 is fixedly installed with the third partition 5, and the lower end of the upper return spring 18 is limited and installed in the upper slot 20. The impact cylinder 16 has a lower slot on its lower side. The upper end of the lower return spring 19 is limited and installed in the lower slot, and the lower end of the lower return spring 19 is fixedly installed with the fourth partition 6. During use, this design improves the stability of the impact hammer 15 when it swings within the impact cylinder 16.

[0026] Example 6: As shown in the appendix Figure 4As shown, it also includes a left straightening boss 23 and a right straightening boss 24. The left straightening boss 23 is located in the middle of the left side of the left arc-shaped boss 21, and the right straightening boss 24 is located in the middle of the right side of the right arc-shaped boss 22. During use, this arrangement improves the stability of the impact hammer 15 when it swings inside the impact cylinder 16.

[0027] Example 7: As attached Figure 1 As shown, a support ring platform 33 is provided on the inner side of the lower end of the impact cylinder 16, and a support ring groove 34 is provided on the inner side of the upper end of the support ring platform 33. The lower sides of the left arc-shaped boss 21 and the right arc-shaped boss 22 are both seated on the upper side of the support ring platform 33, and the lower end of the impact hammer 15 is seated in the support ring groove 34. During use, this arrangement improves the stability of the impact hammer 15 when it swings within the impact cylinder 16.

[0028] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0029] The specific usage process of this invention embodiment can be as follows: (1) Drilling fluid flows into the connecting outer cylinder 1, and then through the jet hole 25 provided on the first partition 3, it is pressurized and flows to the drive impeller 8 to make the drive impeller 8 rotate. Under the rotation of the drive impeller 8, the rotating shaft 7 drives the drive gear 11 to rotate. (2) The drive gear 11 drives the driven gear 12 and the transmission cylinder 13 to rotate through gear meshing, thereby driving the central tube 14 and the impact hammer 15 to rotate, so that the left arc-shaped boss 21 swings and impacts in the left arc-shaped groove 35 and the right arc-shaped boss 22 swings and impacts in the right arc-shaped groove 36. At this time, the upper return spring 18 and the lower return spring 19 undergo torsional deformation. (3) When the drive gear 11 and the driven gear 12 are not meshed, the upper return spring 18 and the lower return spring 19, which have undergone torsional deformation, quickly return to their original positions, so that the left arc-shaped boss 21 is in the left arc-shaped groove 35 and the right arc-shaped boss 22 is in the right arc-shaped groove 36, swinging in opposite directions and impacting each other. (4) The drill bit connected to the lower connector 2 obtains a periodic reciprocating circumferential impact force, which improves the rock breaking efficiency of the PDC drill bit and thus improves the mechanical drilling speed.

Claims

1. A high-temperature resistant circumferential impact acceleration device for oil and gas drilling, characterized in that... The device includes a connecting outer cylinder, a lower connector, and a circumferential impact device. The lower connector is fixedly installed at the lower end of the connecting outer cylinder. From top to bottom, a first partition, a second partition, a third partition, and a fourth partition are fixedly installed on the inner side of the connecting outer cylinder. The circumferential impact device includes an impact drive assembly, an impact transmission assembly, and an impact execution assembly. An upper mounting hole is eccentrically provided on the first partition, and a lower mounting hole is provided on the second partition corresponding to the upper mounting hole. An impact drive assembly capable of rotating hydraulically is located inside the connecting outer cylinder between the first and second partitions. The upper and lower ends of the impact drive assembly are respectively installed in the upper and lower mounting holes. A jet hole is provided on the first partition corresponding to the impact drive assembly. An impact execution assembly capable of providing circumferential impact force is located inside the connecting outer cylinder between the third and fourth partitions. An impact transmission assembly capable of causing the impact execution assembly to periodically reciprocate with the impact drive assembly is located inside the connecting outer cylinder between the second and third partitions. An upper flow hole is provided on the second partition, and a lower flow hole is provided on the third partition.

2. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 1, characterized in that... The impact drive assembly includes a rotating shaft, a drive impeller, an upper bearing, and a lower bearing. The upper part of the rotating shaft is located in the upper mounting hole, and the lower part of the rotating shaft is located in the lower mounting hole. A mounting ring platform is provided on the outer side of the middle part of the rotating shaft. The drive impeller is fixedly mounted on the outer side of the mounting ring platform. An upper bearing is provided on the outer side of the rotating shaft corresponding to the position between the first partition and the mounting ring platform, and a lower bearing is provided on the outer side of the rotating shaft corresponding to the position between the mounting ring platform and the second partition.

3. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 2, characterized in that... The impact transmission assembly includes a drive gear, a driven gear, and a transmission cylinder. The lower end of the rotating shaft is located below the second partition plate. The drive gear is fixedly installed on the outer side of the lower end of the rotating shaft. The drive gear is an incomplete gear. The transmission cylinder is located on the outer side of the drive gear. The driven gear is located on the inner side of the transmission cylinder. The inner side of the driven gear meshes with the outer side of the drive gear at the corresponding position. The upper end of the impact actuator is connected to the central transmission of the lower side of the transmission cylinder.

4. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 3, characterized in that... The impact actuator assembly includes a central tube, an impact hammer, an impact cylinder, a connecting neck, an upper return spring, and a lower return spring. A central tube, whose upper end is connected to the central lower side of the transmission cylinder, is fixedly mounted on the inner side of the upper end of the impact hammer. A left arc-shaped boss is located on the outer left side of the impact hammer, and a right arc-shaped boss is located on the outer right side of the impact hammer. An impact cylinder, located below the impact hammer, is fitted onto the outer side of the impact hammer. A left arc-shaped groove, allowing the left hammer to swing within the groove, is located on the inner upper side of the impact cylinder corresponding to the position of the left arc-shaped boss, and a right arc-shaped groove, allowing the right hammer to swing within the groove, is located on the inner upper upper side of the impact cylinder corresponding to the position of the right arc-shaped boss. A connecting neck, with its lower end located within the lower connector, is fixedly mounted on the lower side of the impact cylinder. An upper return spring is installed on the outer side of the central tube corresponding to the position between the third partition and the impact hammer, and a lower return spring is installed on the outer side of the connecting neck corresponding to the position between the impact cylinder and the fourth partition. The impact hammer has several internally and externally penetrating flow holes on its outer side, and the impact cylinder has several externally and internally penetrating flow holes on its outer side.

5. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 4, characterized in that... The upper side of the impact hammer is provided with an upper slot, the upper end of the upper return spring is fixedly installed together with the third partition, and the lower end of the upper return spring is limited and installed in the upper slot; the lower side of the impact cylinder is provided with a lower slot, the upper end of the lower return spring is limited and installed in the lower slot, and the lower end of the lower return spring is fixedly installed together with the fourth partition.

6. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 4 or 5, characterized in that... It also includes a left straightening protrusion and a right straightening protrusion. The left arc-shaped protrusion has a left straightening protrusion in the middle of the left side, and the right arc-shaped protrusion has a right straightening protrusion in the middle of the right side.

7. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 4 or 5, characterized in that... The lower inner side of the impact cylinder is provided with a support ring platform, and the upper inner side of the support ring platform is provided with a support ring groove. The lower sides of the left arc-shaped boss and the right arc-shaped boss are both seated on the upper side of the support ring platform, and the lower end of the impact hammer is seated in the support ring groove.

8. The high-temperature resistant oil and gas drilling circumferential impact acceleration device according to claim 6, characterized in that... The lower inner side of the impact cylinder is provided with a support ring platform, and the upper inner side of the support ring platform is provided with a support ring groove. The lower sides of the left arc-shaped boss and the right arc-shaped boss are both seated on the upper side of the support ring platform, and the lower end of the impact hammer is seated in the support ring groove.

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