Shaft torsion coupling impact speed-up tool

Abstract

The present application relates to the technical field of impactor, and is a shaft-torsion coupling impact speed-up tool, which comprises an impact hammer, a first short section is sleeved on the upper outer side of the impact hammer, the upper end of the first short section is located above the impact hammer, a first inner ring table is arranged on the lower inner side of the first short section corresponding to the position above the impact hammer, at least two guide ears are uniformly distributed on the outer side of the upper end of the impact hammer, a guide groove is arranged on the inner side of the first inner ring table corresponding to the position of each guide ear, and the outer end of the guide ear is located in the guide groove corresponding to the position. The present application has reasonable and compact structure and is convenient to use. The present application realizes axial impact by injecting drilling fluid from the upper joint to push the impact hammer to move downward, simultaneously drives the circumferential hammer to rotate to transmit circumferential impact to the second short section and the drill head joint, and the spring pushes the impact hammer to move upward after the pressure becomes smaller, so as to realize reciprocating motion. The present application has the characteristics of safety, labor saving, simplicity and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impactor, and is a shaft-torsion coupling impact speed-up tool. BACKGROUND

[0002] With the continuous exploration and development of oil, the oil in shallow strata has been developed, and the oil exploitation technology gradually develops to deep hard strata. With the increase of strata pressure in deep well and super deep well, the drilling technology difficulty is also increasing, and the unknown situation is increasing, which puts forward higher requirements for oil drilling tools. Deep high-hardness difficult-to-drill strata greatly affect the drilling speed, which not only reduces the drilling efficiency and the service life of drilling tools, but also prolongs the drilling time, and greatly increases the drilling cost compared with shallow strata.

[0003] The composite impactor can produce axial impact and torsional impact at the same time. The axial impact can make the plastic rock at the bottom of the well brittle and broken, and the torsional impact can reduce the stick-slip effect in the drilling process, which can improve the drilling speed of deep hard strata, improve the drilling efficiency, and save the drilling cost. The effective measure of the composite impactor in the difficult-to-drill strata is to increase the impact frequency and the single impact energy. Under the action of high-frequency impact, the number of cutting teeth impacting the rock in the same time is increased, the stick-slip effect is reduced, and the degree of rock damage is also increased. The beneficial effect of large single impact energy is that the degree of rock breaking is greater, and the cracks are more, which is beneficial to the further breaking of the rock at the bottom of the well.

[0004] At present, the axial impact of the composite impactor mainly changes the flow direction of the liquid to impact different structural surfaces, generates high and low pressure in the upper and lower areas of the impact hammer, and then moves up and down to produce axial impact. Then the axial impact drives the torsional impact. However, it should be noted that part of the hydraulic energy will be offset by the inertia of the impact hammer moving up and down, which reduces the impact efficiency and the impact force transmitted to the drill bit, so the expected effect may not be achieved. In addition, the liquid impact can be used to drive the rotor to rotate continuously to achieve torsional impact, but this impact requires high erosion resistance of the impact surface. Then the axial impact is realized by designing the structure, such as designing multiple sawtooth structures on the top of the cylinder, thereby realizing the transition from circumferential rotation to axial impact. By changing the number of sawteeth, a higher impact frequency can be achieved, but the increase of the number of sawteeth will limit the height of the sawteeth, and a larger axial impact force cannot be obtained. SUMMARY

[0005] The present application provides a shaft-torsion coupling impact speed-up tool, which overcomes the shortcomings of the prior art and effectively solves the problem of low impact efficiency of the existing composite impactor.

[0006] The technical scheme of the present application is realized by the following measures: a shaft torsion coupling impact accelerating tool, comprising an impact hammer, a first short section sleeved on the upper outer side of the impact hammer, a first inner ring table arranged on the lower inner side of the first short section corresponding to the position above the impact hammer, at least two guide ears arranged on the outer side of the upper end of the impact hammer in a circumferential distribution, a guide groove arranged on the inner side of the first inner ring table corresponding to the position of each guide ear, the outer end of the guide ear located in the guide groove corresponding to the position, a first flow channel arranged on the middle of the impact hammer and penetrating through the upper and lower ends, a sink groove arranged on the inner side of the upper end of the first flow channel, a central shaft arranged on the inner side of the first flow channel and located above the upper end, a second flow channel penetrating through the upper and lower ends arranged on the middle of the central shaft, a limiting outer ring table arranged on the outer side of the upper end of the central shaft and located in the sink groove, a limiting outer ring groove with an opening downward arranged on the inner side of the first flow channel, a stop table arranged on the outer side of the lower end of the central shaft and located in the limiting outer ring groove, a helical boss fixedly arranged on the outer side of the upper end of the central shaft, a rotating valve arranged on the upper side of the first inner ring table, a rotating groove with an opening downward and matching the helical boss arranged on the lower middle of the rotating valve, the upper end of the central shaft located in the rotating groove, a fixed valve arranged on the upper side of the rotating valve and fixedly installed together with the first short section, at least two first flow-through holes and second flow-through holes penetrating through the upper and lower ends and arranged on the outer part of the fixed valve and the rotating valve in a circumferential distribution, respectively, an upper connector fixedly arranged on the inner side of the upper end of the first short section and abutting against the upper side of the fixed valve, a second short section sleeved on the outer side of the lower end of the impact hammer and threadedly connected together with the outer side of the lower end of the first short section, a second inner ring table and a third inner ring table arranged on the inner side of the middle of the second short section from top to bottom and with the inner diameters decreasing in sequence, an installation ring groove arranged on the outer side of the upper part of the impact hammer corresponding to the position above the second inner ring table, a spring sleeved on the outer side of the impact hammer corresponding to the position between the lower side of the installation ring groove and the upper side of the second inner ring table, the lower end of the impact hammer being helical corresponding to the position of the second inner ring table, a circumferential hammer arranged on the lower side of the third inner ring table and matching the outer side of the lower end of the impact hammer, and a drill connector threadedly connected on the inner side of the lower end of the second short section and abutting against the lower side of the circumferential hammer, the middle of the drill connector being provided with a third flow channel penetrating through the upper and lower ends.

[0007] The following is a further optimization or / and improvement of the above technical scheme of the application:

[0008] The above further comprises a hollow shaft, a fixed outer ring groove with an opening upward arranged on the outer side of the upper end of the third flow channel, the hollow shaft fixedly arranged on the inner side of the fixed outer ring groove and located above the upper end, the hollow shaft being in communication with the third flow channel, and the lower part of the impact hammer located between the outer side of the hollow shaft and the inner side of the fixed outer ring groove.

[0009] The middle of the drill connector is arranged with at least one third flow-through hole in a circumferential distribution, which is in communication with the inner side of the fixed outer ring groove and the third flow channel.

[0010] The above further comprises a thrust bearing, the fixed valve middle part is provided with an installation slot opening downward, the rotating valve middle part is provided with a limiting boss corresponding to the installation slot position, the limiting boss upper end is located in the installation slot, and the thrust bearing is arranged between the limiting boss upper end and the installation slot lower side.

[0011] The above blocking table is a blocking ring, and at least two tool holes opening downward are arranged on the lower side of the blocking ring along the circumference.

[0012] The outer side of the central shaft between the position of the limiting outer ring table and the blocking table is uniformly distributed with at least two guide strips along the circumference, and the upper inner side of the impact hammer corresponding to each guide strip position is provided with a sliding groove, and the outer end of the guide strip is located in the sliding groove corresponding to the position.

[0013] The above further comprises a sealing ring, and at least one sealing ring is arranged between the inner side of the impact hammer and the outer side of the central circumference in an up-down interval.

[0014] The present application has the advantages of reasonable structure, compactness, convenience, injection of drilling fluid from the upper joint, driving of the impact hammer to move downward through the first and second flow-through holes to realize axial impact, driving of the circumferential hammer to rotate to transmit circumferential impact to the second short section and the drill head joint, upward movement of the impact hammer by the spring when the pressure becomes smaller, and reciprocating motion, safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a schematic diagram of the front view of the sectional structure of the best embodiment of the present application. Figure 1

[0016] FIG. 2 is a schematic diagram of the enlarged structure of the upper part of the impact hammer after a distance of downward movement in FIG. 1. Figure 2 Figure 1 FIG. 3 is a schematic diagram of the enlarged sectional structure at A-A in FIG. 1.

[0017] FIG. 4 is a schematic diagram of the enlarged sectional structure at B-B in FIG. 1. Figure 3 Figure 1 FIG. 5 is a schematic diagram of the enlarged sectional structure at C-C in FIG. 1.

[0018] FIG. 6 is a schematic diagram of the three-dimensional structure of the central shaft in FIG. 1. Figure 4 Figure 1 FIG. 7 is a schematic diagram of the three-dimensional structure of the impact hammer in FIG. 1.

[0019] FIG. 8 is a schematic diagram of the three-dimensional structure of the rotating valve in FIG. 1. Figure 5 Figure 1 FIG. 9 is a schematic diagram of the three-dimensional structure of the fixed valve in FIG. 1.

[0020] FIG. 10 is a schematic diagram of the three-dimensional structure of the upper joint in FIG. 1. Figure 6 Figure 1 FIG. 11 is a schematic diagram of the three-dimensional structure of the lower joint in FIG. 1.

[0021] FIG. 12 is a schematic diagram of the three-dimensional structure of the second short section in FIG. 1. Figure 7 Figure 1 FIG. 13 is a schematic diagram of the three-dimensional structure of the drill head joint in FIG. 1. ​​​​​​​

[0022] The codes in the drawings are as follows: 1 is an upper joint, 2 is a fixed valve, 3 is a rotating valve, 4 is an impact hammer, 5 is a first short section, 6 is a first inner ring table, 7 is a guide ear, 8 is a first flow channel, 9 is a second flow channel, 10 is a center shaft, 11 is a limiting outer ring table, 12 is a spiral boss, 13 is a sunken groove, 14 is a rotating groove, 15 is a sealing ring, 16 is a first flow-through hole, 17 is a second flow-through hole, 18 is a second short section, 19 is a second inner ring table, 20 is a limiting outer ring groove, 21 is a spring, 22 is a circumferential hammer, 23 is a drill bit joint, 24 is a third flow channel, 25 is a hollow shaft, 26 is a fixed outer ring groove, 27 is a third flow-through hole, 28 is a thrust bearing, 29 is a blocking ring, 30 is a tool hole, 31 is a guide strip, and 32 is a sliding groove. DETAILED DESCRIPTION

[0023] The present application is not limited by the following examples, and the specific implementation can be determined according to the technical solution of the present application and the actual situation.

[0024] In the present application, in order to facilitate the description, the relative position relationship of each component is described according to the layout mode of the drawings attached to the specification, such as the position relationship of front, back, up, down, left, right, etc. is determined according to the layout direction of the drawings attached to the specification. Figure 1

[0025] The present application will be further described below in conjunction with the examples and the drawings:

[0026] As shown in the drawings attached to the specification, the present application is described in detail as follows: Figures 1 to 7 ​As shown, the shaft torsion coupling impact acceleration tool comprises an impact hammer 4, an upper outer side of the impact hammer 4 is sleeved with a first short section 5, an upper end of the first short section 5 is located above the impact hammer 4, a lower inner side of the first short section 5 corresponding to the position above the impact hammer 4 is provided with a first inner ring table 6, an outer side of an upper end of the impact hammer 4 is uniformly distributed with at least two guide ears 7, an inner side of the first inner ring table 6 corresponding to the position of each guide ear 7 is provided with a guide groove, an outer end of the guide ear 7 is located in the guide groove corresponding to the position, a middle part of the impact hammer 4 is provided with a first flow channel 8 penetrating from top to bottom, an inner side of an upper end of the first flow channel 8 is provided with a sunken groove 13, an inner side of the first flow channel 8 is provided with a central shaft 10, an upper end of the central shaft 10 is located above the first flow channel 8, a middle part of the central shaft 10 is provided with a second flow channel 9 penetrating from top to bottom, an outer side of an upper part of the central shaft 10 is provided with a limiting outer ring table 11 located in the sunken groove 13, an inner side of the first flow channel 8 is provided with a limiting outer ring groove 20 opening downward, an outer side of a lower part of the central shaft 10 is detachably provided with a stop table located in the limiting outer ring groove 20, an outer side of an upper end of the central shaft 10 is fixedly provided with a spiral boss 12, an upper side of the first inner ring table 6 is provided with a rotating valve 3, a lower side of the rotating valve 3 is provided with a rotating groove 14 opening downward and matching with the spiral boss 12 in the inner side, an upper end of the central shaft 10 is located in the rotating groove 14, an upper side of the rotating valve 3 is provided with a fixed valve 2 fixedly installed together with the first short section 5, an outer side of the fixed valve 2 and the rotating valve 3 is respectively uniformly distributed with at least two first flow-through holes 16 and second flow-through holes 17 penetrating from top to bottom in the circumferential direction, an inner side of an upper end of the first short section 5 is fixedly provided with an upper joint 1 abutting against an upper side of the fixed valve 2, an outer side of a lower end of the impact hammer 4 is sleeved with a second short section 18, an inner side of an upper end of the second short section 18 is threadedly connected together with an outer side of a lower end of the first short section 5, an inner side of a middle part of the second short section 18 is provided with a second inner ring table 19, an outer side of an upper part of the impact hammer 4 corresponding to the position above the second inner ring table 19 is provided with a mounting ring groove, an outer side of the impact hammer 4 corresponding to the position between a lower side of the mounting ring groove and an upper side of the second inner ring table 19 is sleeved with a spring 21, an outer side of a lower end of the impact hammer 4 corresponding to the position of an upper side of the second inner ring table 19 is in a spiral shape, a lower side of the second inner ring table 19 is provided with a circumferential hammer 22 matching with the outer side of the lower end of the impact hammer 4 in the inner side, an inner side of a lower end of the second short section 18 is threadedly connected with a drill joint 23 abutting against a lower side of the circumferential hammer 22, a middle part of the drill joint 23 is provided with a third flow channel 24 penetrating from top to bottom.

[0027] In use, the initial position of the impact hammer 4 is the upper limit position, that is, the state that the second flow-through holes 17 and the first flow-through holes 16 on the rotating valve 3 and the fixed valve 2 are communicated, the upper end of the central shaft 10 abuts against the middle part of the rotating valve 3, and the second flow channel 9 and the first flow channel 8 of the middle part of the central shaft 10 are blocked.

[0028] According to the requirement, the fixed valve 2 and the first short section 5 are fixedly installed together by a screw, so as to avoid the rotation of the fixed valve 2, the spiral boss 12 and the rotating groove 14 have a gap of 2mm to 3mm in the circumferential direction, so that the gap has a play when they are matched and moved, a small part of fluid passes through the gap, and the gap has a buffering effect when they are matched and rotated.

[0029] The use process of the present application is as follows:

[0030] Downward process: drilling fluid is injected from the middle hole of the upper joint 1, and flows to the upper side of the impact hammer 4 through the first flow-through hole 16 and the second flow-through hole 17, the drilling fluid pushes the impact hammer 4 to move downward, the guide lug 7 on the upper end of the impact hammer 4 moves downward along the guide groove, until the guide lug 7 abuts against the lower side of the guide groove, then the impact hammer 4 stops moving downward, the lower end of the impact hammer 4 impacts the drill bit joint 23, and generates axial impact on the drill bit in the drill bit joint 23, the impact hammer 4 drives the circumferential hammer 22 to rotate when moving downward, the circumferential hammer 22 generates circumferential impact on the second short section 18 and the drill bit joint 23, the spring 21 stores energy when the impact hammer 4 moves downward, and the upper side of the limiting outer ring groove 20 on the inner side of the impact hammer 4 abuts against the upper side of the stop when the impact hammer 4 moves downward for a distance, which pushes the central shaft 10 to move downward, the helical boss 12 on the upper end of the central shaft 10 cooperates with the rotating groove 14 to rotate the rotating valve 3, so that the second flow-through hole 17 is misaligned with the first flow-through hole 16 and no longer communicates, but the first flow channel 8, the second flow channel 9 and the third flow channel 24 communicate with the first flow-through hole 16 and the second flow-through hole 17, the drilling fluid flows out along the first flow channel 8, the second flow channel 9 and the third flow channel 24, which causes the pressure at the upper end of the impact hammer 4 to decrease, and the central hammer also slides downward relative to the impact hammer 4 under the action of gravity, until the limiting outer ring table 11 on the outer side of the central hammer falls into the counterbore, at this time the central hammer also completes the axial impact and the circumferential impact;

[0031] Upward process: after the impact hammer 4 reaches the limit position at the lowermost end, the drilling fluid flows out, the pressure decreases, and the spring 21 pushes the impact hammer 4 to move upward under the action of the restoring force, the sink groove 13 of the impact hammer 4 then pushes the limiting outer ring table 11 to make the central shaft 10 move upward together, when the central shaft 10 moves upward to the rotating groove 14 in the rotating valve 3, the helical boss 12 on the upper end of the central shaft 10 pushes the rotating valve 3 to rotate, so that the first flow-through hole 16 communicates with the second flow-through hole 17, when the guide lug 7 reaches the upper end position of the guide groove, it stops moving upward, and returns to the initial state of the impact hammer 4, preparing for the next impact.

[0032] Repeating the injection of drilling fluid can realize the repeated action of the impact hammer 4 and the circumferential hammer 22, realize the axial and circumferential double impact, reduce the stick-slip effect, and increase the degree of damage to the rock at the same time, make the plastic rock at the bottom of the well brittle and broken, improve the drilling speed of the hard formation at the deep part, and improve the drilling efficiency, by setting the spring 21, the spring 21 stores energy when the impact hammer 4 moves downward, which is used to restore the impact hammer 4, reduces unnecessary energy loss, and improves the impact efficiency.

[0033] The axial-torsional coupling impact speed-up tool can be further optimized or / and improved according to actual needs:

[0034] As shown in the accompanying drawings Figure 1 , 2, 6, further comprising a hollow shaft 25, the third flow channel 24 upper end outside is provided with an upwardly open fixed outer ring groove 26, the fixed outer ring groove 26 lower side middle part is fixedly installed with the hollow shaft 25, the hollow shaft 25 is communicated with the third flow channel 24, the impact hammer 4 lower part is located between the hollow shaft 25 outside and the fixed outer ring groove 26 inside. In use, by setting the hollow shaft 25 can provide guidance for the impact hammer 4 lower part, make its movement more stable.

[0035] As shown in the accompanying drawings Figure 1 , 2 , the drill bit connector 23 middle part is evenly distributed with at least one third flow hole 27, which makes the fixed outer ring groove 26 lower side communicated with the third flow channel 24. In use, when the impact hammer 4 moves upward, the third flow hole 27 can prevent the generation of negative pressure so that the impact hammer 47 is difficult to be separated from the fixed drill bit connector 23, and the third flow hole 27 can also be used as a small flow channel to discharge the liquid flowing down from the gap between the fixed outer ring groove 26 and the impact hammer 4.

[0036] As shown in the accompanying drawings Figure 1 , 2 , further comprising a thrust bearing 28, the fixed valve 2 middle part is provided with a downwardly open mounting groove, the rotating valve 3 middle part is provided with a limiting boss corresponding to the position of the mounting groove, the limiting boss upper end is located in the mounting groove, and the thrust bearing 28 is arranged between the limiting boss upper end and the mounting groove lower side. In use, by setting the thrust bearing 28 to reduce the friction of the pressure bearing part, the service life is prolonged.

[0037] As shown in the accompanying drawings Figure 6 , the stop table is a stop ring 29, the stop ring 29 lower side is provided with at least two downwardly open tool holes 30 along the circumference, and the stop ring 29 is connected with the central shaft 10 through threads. In use, the tool is inserted into the tool hole 30, the stop ring 29 is installed into the central shaft 10 from the inside of the lower end of the impact hammer 4 and rotated, so that it is firmly connected with the central shaft 10 through threads.

[0038] As shown in the accompanying drawings Figure 6 , the central shaft 10 outside is evenly distributed with at least two guide strips 31 corresponding to the position between the limiting outer ring table 11 and the stop table, and the impact hammer 4 upper part inside is provided with a sliding groove 32 corresponding to the position of each guide strip 31, and the guide strip 31 outer end is located in the sliding groove 32 of the corresponding position. In use, the relative movement between the impact hammer 4 and the central shaft 10 is guided by setting the guide strip 31.

[0039] As shown in the accompanying drawings Figure 1 , 2 , further comprising a sealing ring 15, at least one sealing ring 15 is arranged between the impact hammer 4 inside and the central circumference outside in an up-down interval. In use, by setting the sealing ring 15, the drilling fluid can be reduced to flow into the fixed outer ring groove 26, the friction between the lower end of the impact hammer 4 and the impurities in the drilling fluid is reduced, and the wear is further reduced.

[0040] The above technical features constitute the best embodiments of the present application, which have strong adaptability and best implementation effects. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A shaft torsion coupling impact speed-up tool characterized by The impact hammer is sleeved with the first short section on the upper outer side of the impact hammer, the first inner ring table is arranged on the lower inner side of the first short section corresponding to the position above the impact hammer, at least two guide ears are uniformly distributed on the outer side of the upper end of the impact hammer, the guide groove is arranged on the inner side of the first inner ring table corresponding to the position of each guide ear, the outer end of the guide ear is located in the guide groove corresponding to the position, the first flow channel is arranged in the middle of the impact hammer and penetrates the upper and lower ends, the sunken groove is arranged on the inner side of the upper end of the first flow channel, the central shaft is arranged on the inner side of the first flow channel and located above the upper end, the second flow channel is arranged in the middle of the central shaft and penetrates the upper and lower ends, the limiting outer ring table is arranged on the outer side of the upper end of the central shaft and located in the sunken groove, the limiting outer ring groove is arranged on the inner side of the first flow channel and opens downward, the stop table is detachably mounted on the outer side of the lower end of the central shaft and located in the limiting outer ring groove, the spiral boss is fixedly mounted on the outer side of the upper end of the central shaft, the rotating valve is arranged on the upper side of the first inner ring table, the rotating groove is arranged on the lower side of the rotating valve and opens downward and matches the spiral boss on the inner side, the central shaft is located in the rotating groove on the upper end, the fixed valve is fixedly installed together with the first short section on the upper side of the rotating valve, at least two first flow-through holes and second flow-through holes which penetrate the upper and lower ends are respectively and uniformly distributed on the outer part of the fixed valve and the rotating valve in a circle, the upper connector is fixedly installed on the inner side of the upper end of the first short section and abuts against the upper side of the fixed valve, the second short section is sleeved on the outer side of the lower end of the impact hammer and is connected together with the outer side of the lower end of the first short section through threads on the inner side of the upper end, the second inner ring table and the third inner ring table with gradually decreasing inner diameters from top to bottom are arranged on the inner side of the middle of the second short section, the installation ring groove is arranged on the outer side of the upper part of the impact hammer corresponding to the position above the second inner ring table, the spring is sleeved on the outer side of the impact hammer corresponding to the position between the lower side of the installation ring groove and the upper side of the second inner ring table, the lower end of the impact hammer is in a spiral shape corresponding to the position of the second inner ring table, the circumferential hammer is arranged on the lower side of the third inner ring table and matches the outer side of the lower end of the impact hammer on the inner side, the drill connector is connected through threads on the inner side of the lower end of the second short section and abuts against the lower side of the circumferential hammer on the upper end, the third flow channel is arranged in the middle of the drill connector and penetrates the upper and lower ends.

2. The shaft torsion coupling impact speed-up tool according to claim 1, characterized in that The hollow shaft is arranged on the outer side of the lower part of the impact hammer and between the outer side of the hollow shaft and the inner side of the fixed outer ring groove, the fixed outer ring groove is arranged on the outer side of the upper end of the third flow channel and opens upward, the hollow shaft is fixedly installed on the inner side of the lower side of the fixed outer ring groove and located above the upper end, the hollow shaft is communicated with the third flow channel, the lower part of the impact hammer is located between the outer side of the hollow shaft and the inner side of the fixed outer ring groove.

3. The shaft torsion coupling impact speed-up tool according to claim 2, characterized in that At least one third flow-through hole is uniformly distributed in a circle on the outer side of the central shaft corresponding to the position between the limiting outer ring table and the stop table and is arranged on the inner side of the lower side of the fixed outer ring groove and communicated with the third flow channel.

4. The shaft torsion coupling impact speed-up tool according to claim 1 or 2 or 3, characterized in that The thrust bearing is arranged on the inner side of the lower side of the fixed outer ring groove corresponding to the position between the limiting outer ring table and the stop table, the installation groove is arranged on the lower side of the fixed valve and opens downward, the limiting boss is arranged on the middle of the rotating valve corresponding to the position of the installation groove, the outer end of the limiting boss is located in the installation groove, and the thrust bearing is arranged between the upper end of the limiting boss and the lower side of the installation groove.

5. The shaft torsion coupling impact speed-up tool according to claim 1 or 2 or 3, characterized in that The stop table is a stop ring, at least two tool holes which open downward are arranged in a circle on the lower side of the stop ring.

6. The shaft torsion coupling impact speed-up tool according to claim 4, characterized in that The stop table is a stop ring, at least two tool holes which open downward are arranged in a circle on the lower side of the stop ring, and the stop ring is connected together with the central shaft through threads.

7. The shaft-coupling impact speed-up tool according to claim 1 or 2 or 3 or 6, characterized in that At least two guide strips are uniformly distributed in a circle on the outer side of the central shaft corresponding to the position between the limiting outer ring table and the stop table, the sliding groove is arranged on the inner side of the upper part of the impact hammer corresponding to the position of each guide strip, and the outer end of the guide strip is located in the sliding groove corresponding to the position.

8. The shaft torsion coupling impact speed-up tool according to claim 4, characterized in that Corresponding to the position between the limiting outer ring platform and the stop platform, at least two guide strips are evenly distributed along the circumference outside the central axis, and a sliding groove is arranged on the inner side of the upper part of the impact hammer corresponding to the position of each guide strip. The outer end of the guide strip is located in the sliding groove corresponding to the position.

9. The shaft torsion coupling impact speed-up tool of claim 5, wherein Corresponding to the position between the limiting outer ring platform and the stop platform, at least two guide strips are evenly distributed along the circumference outside the central axis, and a sliding groove is arranged on the inner side of the upper part of the impact hammer corresponding to the position of each guide strip. The outer end of the guide strip is located in the sliding groove corresponding to the position.

10. The shaft-coupling impact speed-up tool of claim 2 or 3, wherein Further comprising a sealing ring, at least one sealing ring is arranged between the inner side of the impact hammer and the outer side of the central circumference in an up-down interval.

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