Well drilling buckling device with damping buffer device and use method

Abstract

The invention discloses a buckling device with a damping buffer device for well drilling and a using method, and belongs to the technical field of oil exploration equipment, a damping device is arranged on the side wall of a shell, compressed air in a piston cavity is discharged through a damping hole in the descending process of a piston, the air discharging process is the buffer process, and the damping buffer device is arranged on the side wall of the shell. And the situation that drilling tool threads are damaged due to collision of drilling tool joints in the buckling process can be avoided to a great extent. The process of exhausting gas through the damping device is equivalent to providing a gas spring for the piston, thread soft landing in the buckling process of the drilling tool can be achieved, the buffering effect is achieved, finally the effect of protecting the threads of the drilling tool is achieved, and the problem that in the prior art, the threads of the drilling tool are damaged due to the fact that the buffering effect is not achieved in the buckling process is solved. From the angle of the drilling tool buckling process, the buckling device with the damping buffer device is designed, the buckling efficiency is improved, the probability of thread damage in the buckling process is greatly reduced, and therefore the effects of speed increasing and efficiency increasing are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum exploration equipment, and in particular relates to a buckle device with a damping buffer device for drilling and a use method thereof. Background Art

[0002] During the drilling process, the drill bit fastener is one of the tools used to connect the drill bit in the drilling operation. It plays the role of aligning the drill bit with the drill bit in the well, facilitating the fastening operation and reducing the fastening time. The traditional fastening method has the problems of difficulty in fastening and low precision. In addition, the collision of the drill bit's own weight during the fastening process causes damage to the internal and external threads and sealing surfaces of the drill bit. If it is not discovered in time, the failure probability of the threads and sealing surfaces will increase in subsequent drilling operations. At the least, the drill bit will have slight cracks, and at the worst, it will cause the drill bit to leak and break. The accident handling not only delays the construction period, but also consumes a lot of manpower, material and financial resources.

[0003] A Chinese patent with publication number CN2047711U discloses a guide fastening device for drilling operations, which includes a guide bucket, a suspension body with an inner hook groove, a contact lever, etc. However, the fastening device cannot effectively protect the sealing surface of the box buckle, and does not play a buffering role during the fastening process, which may cause damage to the thread of the drill tool. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a drilling fastener with a damping buffer device and a method of use, so as to solve the technical problems in the prior art that the fastener cannot effectively protect the sealing surface of the female buckle and does not play a buffering role during the fastening process, which may cause damage to the drill bit thread.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A drilling rivet with a damping buffer device comprises a damping device, wherein the damping device is arranged on the side wall of a shell of the rivet, and a damping hole inside the damping device communicates a piston chamber inside the shell with the outside of the shell.

[0007] Preferably, there are two shells, and the two shells are symmetrical with each other and can be closed or opened by being matched or separated; an inverted triangular step is provided on the inner wall surface of the shell, and the triangular bottom surface of the inverted triangular step contacts the sealing surface of the drill bit female joint.

[0008] Preferably, a locking mechanism is also provided on the shell, and the locking mechanism includes: a first connecting seat and a second connecting seat, the first connecting seat and the second connecting seat are respectively arranged on the two shells, one end of the bolt is hinged on the first connecting seat, and a screw sleeve is arranged on the other end, a small opening groove into which the bolt can be inserted is provided on the second connecting seat near one end of the first connecting seat, and a large opening groove that can accommodate the screw sleeve is provided on the other end, and a locking surface is provided between the small opening groove and the large opening groove.

[0009] Preferably, a piston chamber is provided at the upper end of the shell, a plurality of limit block mounting grooves are provided at the upper end of the piston chamber, a piston chamber connecting hole for connecting to the damping device is provided at the lower end, and a limit hole for guiding is also provided at the lower end.

[0010] Preferably, a guide bucket is arranged above the shell, a bearing structure is arranged in the middle of the inner side of the guide bucket, a piston matching with the piston chamber is fixed at the lower end of the guide bucket, a plurality of limit rods are arranged at the lower end of the piston, and a return spring is arranged on the outer sleeve of the limit rod.

[0011] Preferably, a sealing groove is circumferentially provided on the outer side of the piston, and a sealing ring is arranged in the sealing groove.

[0012] Preferably, the damping device also includes: a valve sleeve; the valve sleeve is installed on the side wall of the shell, and the valve sleeve is provided with a damping hole passing through it along the axis, a plug is provided at one end of the damping hole close to the side wall of the shell, and a cone core is provided at the other end, the cone core and the plug are connected by an adjusting rod, and the adjusting rod passes through the plug, and a spring is also sleeved on the outside between the cone core and the plug, and an exhaust hole is provided along the axis at one end of the adjusting rod close to the plug, and a connecting hole for connecting the damping hole and the exhaust hole is also provided in the radial direction.

[0013] Preferably, a damping device sealing ring is further provided between the housing and the valve sleeve.

[0014] Preferably, a handle portion is also provided on the outer wall of the shell.

[0015] The present invention also discloses a method for using a fastener with a damping buffer device for drilling, comprising the following steps:

[0016] The drill bit starts to buckle, and the air in the piston chamber is compressed under the action of gravity;

[0017] The compressed gas is discharged to the external environment through the damping hole in the damping device;

[0018] Under the effect of gas buffering, the drill bit is buckled. Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses a drilling rivet with a damping buffer device. A damping device is arranged on the side wall of the shell, so that the compressed air in the piston chamber is discharged through the damping hole during the downward process of the piston. The process of air being discharged from the damping hole is the buffering process, which can largely avoid the situation where the drill tool thread is damaged due to the collision of the drill tool joint during the rivet process. The process of discharging gas through the damping device is equivalent to providing a gas spring for the piston, which can achieve a soft landing of the thread during the rivet process of the drill tool, play a buffering role, and finally achieve the effect of protecting the drill tool thread, solving the technical problem that the drill tool thread is damaged due to the lack of buffering effect in the rivet process in the prior art. In drilling engineering, the situation of drilling tools breaking into the well often occurs, and the subsequent salvage operation is time-consuming and costly. One of the reasons for the breakage is that the thread has cracks or other damage. Therefore, the present invention designs a rivet with a damping buffer device from the perspective of the rivet process of the drill tool, improves the efficiency of rivet, greatly reduces the probability of thread damage during rivet, and thus plays a role in speeding up and increasing efficiency.

[0020] Furthermore, an inverted triangular step is provided on the inner wall surface of the shell, and the inverted triangular structure on the inner surface of the shell sits on the sealing surface of the female buckle, thereby protecting the sealing surface of the female buckle end and solving the technical problem in the prior art that the buckle device cannot effectively protect the sealing surface of the female buckle.

[0021] Furthermore, the compressed gas in the piston chamber can act on the cone core surface through the damping hole. When the pressure is greater than the thrust provided by the spring, the valve core starts to work, and the compressed gas entering from the damping hole can enter the exhaust hole through the connecting hole and be discharged to the external environment. Through this process, a gas spring is provided for the piston, so that the thread can land softly during the drilling tool fastening process, play a buffering role, and finally protect the drilling tool thread.

[0022] Furthermore, the drill bit is aligned with the drilling bit in the well through the guide bucket on the upper part of the piston. The aligned drill bit acts on the bearing surface on the upper part of the piston, driving the piston downward. The limit rod connected to the piston ensures that the piston will not tilt during the downward movement and also ensures that the seal on the piston is intact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention when it is in a closed state;

[0024] Figure 2 It is a schematic diagram of the structure of the present invention when the drilling tool is buckled (half);

[0025] Figure 3 It is a structural schematic diagram of the assembly relationship between the piston and the housing in the present invention;

[0026] Figure 4 A cross-sectional view of the damping device assembly of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the locking mechanism of the present invention.

[0028] In the figure: 1-guide bucket; 2-shell; 3-handle; 4-damping device; 5-bolt; 6-screw sleeve; 7-second connecting seat; 8-first connecting seat; 9-bearing structure; 10-positioning block; 11-drilling tool male joint; 12-inverted triangle step; 13-drilling tool female joint; 14-drilling tool female joint sealing surface; 15-reset spring; 16-piston; 17-sealing groove and sealing ring; 18-limiting rod; 19-limiting hole; 20-damping device mounting hole; 21-piston chamber; 22-limiting block mounting groove; 23-piston chamber connecting hole; 24-conical core; 25-damping hole; 26-damping device sealing ring; 27-valve sleeve; 28-blocking; 29-adjusting rod; 30-exhaust hole; 31-connecting hole; 32-spring; 33-locking surface. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0032] The present invention discloses a drilling clasp with a damping buffer device. Different from the prior art, the clasp disclosed in the present invention is provided with a damping device 4 on the side wall of the shell 2, and the damping hole 25 inside the damping device 4 connects the piston chamber 21 inside the shell 2 with the external environment of the shell 2; during the downward process of the piston, the compressed air in the piston chamber 21 is discharged through the damping hole 25, and the process of air being discharged from the damping hole 25 is the buffering process, which can greatly avoid the situation where the drill tool thread is damaged due to the collision of the drill tool joint during the clasp process. The process of discharging gas through the damping device 4 is equivalent to providing a gas spring for the piston, which can realize the soft landing of the thread during the clasp process of the drill tool, play a buffering role, and finally achieve the role of protecting the drill tool thread, solving the technical problem that the prior art does not play a buffering role during the clasp process, which will cause the drill tool thread to be damaged. In drilling projects, drill bits often break and enter the well, and subsequent salvage operations are time-consuming and costly. One of the reasons for the breakage is cracks or other damage to the threads. Therefore, from the perspective of the drill bit fastening process, the present invention designs a fastener with a damping buffer device to improve the fastening efficiency and greatly reduce the probability of thread damage during the fastening process, thereby playing a role in speeding up and increasing efficiency.

[0033] A method for using a fastener with a damping buffer device for drilling, comprising the following steps:

[0034] S1: The drill bit starts to buckle, and the air in the piston chamber 21 is compressed under the action of gravity;

[0035] S2: The compressed gas is discharged to the external environment through the damping hole 25 in the damping device 4;

[0036] S3: Under the action of gas buffer, the drill bits are fastened together.

[0037] As a preferred solution, there are two shells 2, and the two shells 2 are symmetrical to each other and can be closed or opened by being matched or separated; the inner wall surface of the shell 2 is provided with an inverted triangular step 12, and the triangular bottom surface of the inverted triangular step 12 contacts the sealing surface 14 of the drill bit female joint. The inverted triangular step 12 on the inner surface of the shell 2 sits on the female buckle sealing surface, protecting the female buckle end sealing surface, solving the technical problem that the buckle in the prior art cannot effectively protect the female buckle sealing surface.

[0038] As a preferred solution, the damping device 4 further includes: a valve sleeve 27; the valve sleeve 27 is mounted on the side wall of the housing 2, and the valve sleeve 27 is provided with a damping hole 25 penetrating therethrough along the axis, a plug 28 is provided at one end of the damping hole 25 near the side wall of the housing 2, and a cone core 24 is provided at the other end, the cone core 24 and the plug 28 are connected by an adjusting rod 29, and the adjusting rod 29 penetrates the plug 28, and a spring 32 is sleeved on the outer portion between the cone core 24 and the plug 28, and an exhaust hole 30 is provided along the axis at one end of the adjusting rod 29 near the plug 28, and a connecting hole 31 for connecting the damping hole 25 and the exhaust hole 30 is also provided in the radial direction. The compressed gas in the piston chamber 21 can act on the surface of the cone core 24 through the damping hole 25, and when the pressure is greater than the thrust provided by the spring 32, the valve core starts to work, and the compressed gas entering from the damping hole 25 can enter the exhaust hole 30 through the connecting hole 31 and be discharged to the external environment. Through this process, a gas spring is provided for the piston 16, so that the threads can land softly during the fastening process of the drill bit, play a buffering role, and finally protect the threads of the drill bit.

[0039] As a preferred solution, a guide bucket 1 is arranged above the shell 2, and a bearing structure 9 is arranged in the middle of the inner side of the guide bucket 1. A piston 16 matching the piston chamber 21 is fixed at the lower end of the guide bucket 1, and a plurality of limit rods 18 are arranged at the lower end of the piston 16. A return spring 15 is arranged on the outer sleeve of the limit rod 18. The drilling tool is aligned with the drilling tool in the well through the guide bucket on the upper part of the piston. The centered drilling tool acts on the bearing surface on the upper part of the piston to drive the piston downward. The limit rod connected to the piston ensures that the piston will not tilt during the downward movement, and also ensures that the seal on the piston is intact.

[0040] As a preferred solution, see Figure 1 to Figure 5 The present invention provides a device that has both the function of guiding the centering and buffering of the drill tool, and provides a drilling tool with a damping buffer device, which can reduce the drilling tool buckling time and protect the drilling tool thread and sealing surface. It includes a housing 2, a piston 16, a piston chamber 21, a sealing ring 17, a limit rod 18, a reset spring 15, a damping hole 25, a damping device and a locking mechanism.

[0041] Two shells 2, the two shells are symmetrical, and the two shells can be closed or opened by being joined or separated;

[0042] Two pistons 16, the two pistons 16 are detachably connected to the piston chamber 21, and the pistons 16 can move downward or upward in the piston chamber 21;

[0043] A piston chamber 21 corresponding to the piston 16, wherein the piston chamber 21 is a space with a smooth inner wall axially processed on the housing 2, and the piston chamber 21 provides a stroke for the piston 16 when it moves up / down;

[0044] Four sealing rings, the four sealing rings being installed in sealing grooves on the corresponding pistons;

[0045] Six return springs 15, the six return springs 15 are spaced 60 degrees apart from each other and connected to the housing 2 and the piston 16;

[0046] A limiting rod 18 corresponding to the return spring 15, wherein the limiting rod 18 is a cylindrical rod connected to the piston 16 and a limiting hole 19 on the housing 2;

[0047] Two damping holes 25, the damping holes 25 are opened at the bottom of the piston chamber 21 and lead out from the outer surface of the housing 2;

[0048] A damping device 4 corresponding to the damping hole 25, wherein the damping device 4 is connected to the damping hole 25 extending from the outer surface of the housing 2;

[0049] The locking mechanism is symmetrically distributed on both sides of the shell 2, and is used to lock and connect the two ends of the two shells when the two shells are matched to a closed state.

[0050] Optionally, a connection method is provided between the housing 2 and the sealing surface of the drill bit joint female buckle, and an inverted triangular step is provided on the inner surface of the housing, and the step surface of the inverted triangular step is vulcanized or inlaid with a rubber layer.

[0051] Optionally, for easy taking, a handle 3 is provided on each of the two shells 2 .

[0052] Optionally, the upper part of the piston 16 includes a guide bucket 1, which can be selectively connected to the piston by welding or pinning, and its taper is about 60°;

[0053] The bearing structure 9 where the guide bucket 1 is located contacts with the male buckle sealing surface of the drilling tool, and the bearing structure 9 needs to be vulcanized or inlaid with a rubber layer.

[0054] Optionally, a specific limit is provided for the piston 16 and the housing 2, and a circumferential positioning block 10 is provided on the top outer edge of the housing 2, and the positioning block 10 is installed in the installation groove 22 of the housing and connected by a pin.

[0055] Optionally, a connection method is provided for the piston 16 and the limiting rod 18, and a circumferential connection hole is provided at the bottom of the piston 16, which is connected by threads.

[0056] Optionally, a connection method is provided between the limiting rod 18 and the housing 2 , and a circumferential connection hole connected to the limiting rod 18 is provided at the bottom of the piston chamber.

[0057] Optionally, the damping device comprises a valve sleeve 27, a valve core, and a plug 28;

[0058] The valve core comprises a cone core 24, a spring 32 and an adjusting rod 29;

[0059] The valve sleeve 27 is provided with a damping hole 25, so that the piston chamber 21 is connected with the assembly hole of the valve core of the damping device 4;

[0060] The valve sleeve 27 is connected to the valve sleeve matching hole through threads to achieve the connection between the damping device 4 and the piston chamber communicating hole 23;

[0061] The cone core 24 and the spring 32 are installed in the valve core assembly hole;

[0062] The adjusting rod 29 is connected to the cone core 24 by threads, and the adjusting rod 29 is hollow, with a plurality of small holes on the side, forming a one-way valve core that conducts one-way from the piston chamber to the valve core;

[0063] The plug 28 is connected to the sleeve via threads.

[0064] Optionally, a sealing method is provided for the installation of the damping device, a sealing groove is provided on the surface of the damping hole countersunk hole, and a matching damping device sealing ring 26 is installed when the damping device is connected to the damping hole.

[0065] Optionally, a specific structure is provided for the locking mechanism, wherein the locking mechanism comprises four connecting seats, two bolts and two screw sleeves;

[0066] The four connection seats are connected to the housing in pairs, and the two groups of connection seats are symmetrically distributed.

[0067] The group of connection seats includes a first connection seat 8 and a second connection seat 7;

[0068] One end of the bolt is hinged on the first connecting seat 8;

[0069] The second connecting seat 7 is provided with a small opening groove for the bolt 5 to be inserted into;

[0070] The screw sleeve 6 is provided with an external hexagonal structure;

[0071] The screw sleeve 6 is connected to the bolt 5 by threads, and the bolt 5 is rotated to make the bolt 5 fit into the small opening groove, and the screw sleeve 6 is screwed against the second connecting seat 7 to lock the housing 2.

[0072] like Figure 2As shown, the guide bucket 1 plays a guiding role and can quickly realize the centering of the drill tool male joint 11 and the female joint 13; the surface of the bearing structure 9 is vulcanized or inlaid with a rubber layer, which can protect the sealing surface of the drill tool male joint 11 from being damaged when the drill tool male joint 11 sits on the bearing structure 9;

[0073] like Figure 3 As shown, a sealing groove is provided on the piston body 16, and a sealing ring 17 is provided in the sealing groove. After installation, the piston body 16 is connected to the piston chamber 21 and is sealed by the sealing ring 17; when the drill tool is centered, when the drill tool male joint 11 sits on the bearing structure 9, the bearing structure 9 transmits the gravity of the drill tool downward, and at the same time, under the action of the limiting rod 18 and the limiting hole 19, it is ensured that the piston body 16 does not tilt during the downward process; the reset spring 15 mainly plays the role of resetting the piston body 16 upward during the working process.

[0074] like Figure 1 As shown, the piston body 16 is fixed to the housing 2 by means of screws using a positioning block 10, thereby limiting the maximum height of the piston's upward movement.

[0075] like Figure 2 As shown, the inner surface of the shell 2 is provided with the inverted triangle step 12, and the surface is vulcanized or inlaid with a rubber layer, so that the shell 2 can sit on the sealing surface 14 of the drill bit female joint 13; at the same time, the two shells 2 are respectively connected with handles 3.

[0076] like Figure 4 As shown, the damping device 4 includes a cone core 24, a spring 32, an adjustment rod 29 and a plug 28;

[0077] The cone core 24 is not an upper cone and a lower cylinder, but a certain portion of material is cut off from both sides to ensure that the piston chamber communication hole 23 and the exhaust hole 30 remain in a communication state when the drill male connector 11 and the female connector 13 are aligned;

[0078] The compressed gas in the piston chamber 21 can act on the surface of the cone core 24 through the damping hole. When the pressure is greater than the thrust provided by the spring 32, the valve core starts to work, and the compressed gas entering from the damping hole 25 can enter the exhaust hole 30 through the connecting hole 31 and be discharged to the external environment.

[0079] like Figure 5 As shown, the locking device includes a first connecting seat 8, a second connecting seat 7, a bolt 5, a threaded sleeve 6 and a locking surface 33;

[0080] The bolt 5 is connected to the first connecting seat 8 by a hinge, and the bolt 5 is connected to the screw sleeve 6 by a thread. When the screw sleeve 6 is rotated to the vicinity of the locking surface 33 of the second connecting seat 7, the screw sleeve 6 is rotated so that the screw sleeve 6 can press against the locking surface 33 to achieve a locking effect.

[0081] In summary, when the two shells 2 are closed, the two shells 2 sit on the sealing surface 14 of the drill female joint 13 through the inverted triangle step 12, and the two shells 2 are locked by adjusting the screw sleeve 6 to fix the two shells 2 on the drill female joint 13; when buckled, the male joint 11 is quickly aligned with the female joint 13 through the guide bucket 1 and sits on the bearing structure 9, and the gravity of the upper drill is transmitted downward through the bearing structure 9 to cause the piston body 16 to move downward, and the air in the piston chamber 21 is compressed. When the pressure acting on the surface of the cone core 24 is greater than the thrust provided by the spring 32, the air in the piston chamber 21 passes through the damping hole 25 and then through the connecting hole 31 into the exhaust hole 30 to be discharged to the external environment. In addition, the exhaust speed of the damping device can also be adjusted by the adjusting rod 29. The process of exhausting gas through the damping device is equivalent to providing a gas spring for the piston, which can achieve soft landing of the thread during the buckling process of the drill, play a buffering role, and finally achieve the effect of protecting the drill thread.

[0082] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A fastener with a damping buffer device for drilling, characterized in that: include: The damping device (4) is arranged on the side wall of the shell (2) of the buckle device, and the damping hole (25) inside the damping device (4) communicates with the piston chamber (21) inside the shell (2) and the outside of the shell (2).

2. The buckle device with damping buffer device for drilling according to claim 1, characterized in that: There are two shells (2), and the two shells (2) are symmetrical to each other and can be closed or opened by being joined or separated; an inverted triangular step (12) is provided on the inner wall surface of the shell (2), and the triangular bottom surface of the inverted triangular step (12) contacts the sealing surface (14) of the drill bit female joint.

3. The buckle device with damping buffer device for drilling according to claim 2, characterized in that: The housing (2) is also provided with a locking mechanism, which comprises: a first connecting seat (8) and a second connecting seat (7), the first connecting seat (8) and the second connecting seat (7) being respectively arranged on the two housings (2), one end of the bolt (5) being hingedly connected to the first connecting seat (8), and a screw sleeve (6) being arranged on the other end, a small opening groove into which the bolt (5) can be inserted is provided on the second connecting seat (7) at one end close to the first connecting seat (8), and a large opening groove capable of accommodating the screw sleeve (6) is provided at the other end, and a locking surface (33) is provided between the small opening groove and the large opening groove.

4. The buckle device with damping buffer device for drilling according to claim 1, characterized in that: The housing (2) has a piston chamber (21) at the upper end thereof, a plurality of limit block mounting grooves (22) at the upper end thereof, a piston chamber connecting hole (23) for connecting with the damping device (4) at the lower end thereof, and a limit hole (19) for guiding at the lower end thereof.

5. The buckle device with damping buffer device for drilling according to claim 4, characterized in that: A guide bucket (1) is arranged above the shell (2), a bearing structure (9) is arranged in the middle of the inner side of the guide bucket (1), a piston (16) matched with the piston chamber (21) is fixed at the lower end of the guide bucket (1), a plurality of limit rods (18) are arranged at the lower end of the piston (16), and a return spring (15) is arranged on the outer sleeve of the limit rod (18).

6. A fastener with a damping buffer device for drilling according to claim 5, characterized in that: A sealing groove is circumferentially formed on the outer side of the piston (16), and a sealing ring (17) is arranged in the sealing groove.

7. The buckle device with damping buffer device for drilling according to claim 1, characterized in that: The damping device (4) further comprises: a valve sleeve (27); the valve sleeve (27) is mounted on the side wall of the housing (2); a damping hole (25) is provided in the valve sleeve (27) along the axis thereof and passes through the valve sleeve (27); a plug (28) is provided at one end of the damping hole (25) close to the side wall of the housing (2); a cone core (24) is provided at the other end; the cone core (24) and the plug (28) are connected via an adjusting rod (29); the adjusting rod (29) passes through the plug (28); a spring (32) is sleeved on the outside between the cone core (24) and the plug (28); an exhaust hole (30) is provided at one end of the adjusting rod (29) close to the plug (28) along the axis thereof; and a connecting hole (31) is provided in the radial direction thereof for connecting the damping hole (25) and the exhaust hole (30).

8. The buckle device with damping buffer device for drilling according to claim 7, characterized in that: A damping device sealing ring (26) is also provided between the housing (2) and the valve sleeve (27).

9. The buckle device with damping buffer device for drilling according to claim 1, characterized in that: A handle portion (3) is also provided on the outer wall of the shell (2).

10. A method for using a fastener with a damping buffer device for drilling according to any one of claims 1 to 9, characterized in that: The following steps are involved: The drill tools begin to lock together, and the air in the piston chamber (21) is compressed under the action of gravity; The compressed gas is discharged to the external environment through the damping hole (25) in the damping device (4); Under the action of gas buffer, the drill bits are fastened together.

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