Vibration reduction drill bit for oil and gas exploitation

Abstract

The utility model discloses a vibration reduction drill bit for oil and gas exploitation, which relates to the field of petroleum and geological drilling tools, and comprises a joint main body and a drill bit main body which are sleeved with each other, a vibration reduction element is arranged in an axial gap between the joint main body and the drill bit main body, and an anti-falling structure is arranged on the joint main body and the drill bit main body together. The anti-falling structure enables the connector body and the drill bit body to be mutually twisted but not separated. The damping device not only can realize axial damping, but also can perform damping on torsional impact, and is simple in structure, convenient to process and convenient to disassemble and assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of petroleum and geological drilling tool, specifically, relate to a kind of oil and gas exploitation shock-absorbing drill bit. BACKGROUND

[0002] Drill bit is the main tool for breaking rock in the process of oil drilling, and its rock breaking mode mainly has three kinds: cutting, shearing, chipping and shearing.

[0003] Among them, PDC drill bit has higher mechanical drilling speed and longer service life, and has become the most used oil drilling bit on site, but PDC drill bit is extremely sensitive to formation conditions, and is more suitable for drilling in soft to medium-hard homogeneous formation, when PDC drill bit drills in hard formation or special formation (such as conglomerate), the cutting teeth are easy to be impacted by large impact load and collapse to lose cutting ability.

[0004] During drilling, due to the complexity of bottom hole conditions, especially in the operation of high angle deviated wells, horizontal wells and small boreholes, the operation conditions of the drill string are very bad, therefore, the drill bit and drill pipe will definitely vibrate, not only causing the PDC drill bit to deviate in the horizontal direction, but also easily leading to the collapse of PDC drill bit, and further leading to the early failure of PDC drill bit, increasing the cost of drilling.

[0005] Although there are similar function shock-absorbing drill bits on the market now, for example, the PDC drill bit with shock-absorbing function disclosed in the utility model patent with application number 202420934166.X, the PDC drill bit can effectively avoid the jump drilling phenomenon of PDC drill bit, but the connection main body and drill bit main body in the drill bit are mainly connected by key connection to prevent the two from falling off, so that the drill bit main body and the connection main body cannot rotate relatively, when the PDC drill bit drills in conglomerate formation, hard formation and soft and hard alternating formation and torsional impact vibration occurs, it will also cause the fragmentation and collapse of the diamond layer of PDC cutting teeth, causing damage and failure of PDC cutting teeth and PDC drill bit.

[0006] Therefore, there is an urgent need for a shock-absorbing drill bit for oil and gas exploitation that can reduce torsional impact vibration. UTILITY MODEL CONTENT

[0007] The utility model aims to provide a kind of shock-absorbing drill bit for oil and gas exploitation, which can not only realize axial vibration reduction, but also reduce torsional impact, and has simple structure, easy processing and convenient disassembly and assembly.

[0008] The utility model discloses a kind of vibration reduction drill bits for oil and gas exploitation, including mutually sleeved joint main body and drill bit main body, vibration reduction element is installed in the axial clearance of joint main body and drill bit main body, and anti-drop structure is jointly installed on joint main body and drill bit main body, and anti-drop structure makes joint main body and drill bit main body can be mutually twisted but not separate.

[0009] Further, the anti-drop structure is multiple, and the multiple anti-drop structures are uniformly spaced along the circumferential direction of the drill bit main body.

[0010] Further, the anti-drop structure includes an arc-shaped groove formed on the inner wall of the joint main body or / and the outer wall of the drill bit main body, the joint main body and the drill bit main body cooperate to form an arc-shaped cavity, and an anti-drop piece is jointly installed on the drill bit main body and the joint main body, one end of the anti-drop piece or one side of the anti-drop piece is located in the arc-shaped cavity.

[0011] Further, the arc-shaped cavity is formed by the arc-shaped grooves corresponding to each other on the outer wall of the joint main body and the inner wall of the drill bit main body, and the anti-drop piece is a ball installed in the arc-shaped cavity, the length of the ball occupying in the arc-shaped cavity is less than the length of the arc-shaped cavity.

[0012] Further, the joint main body is further provided with a mounting port for installing the ball into the arc-shaped cavity, and a detachable plug is installed in the mounting port.

[0013] Further, the outer wall of the drill bit main body has a first outer step, the joint main body further has a first inner step, and the vibration reduction element is fixed between the first outer step and the first inner step.

[0014] Further, the vibration reduction element is a spring, and the vibration reduction element is sleeved on the drill bit main body.

[0015] Further, the first outer step is located in the joint main body.

[0016] Further, the joint main body further has a second inner step, the drill bit main body has a second outer step, and the end face of the joint main body insertion end cooperates with the second inner step, and the second outer step cooperates with the first inner step.

[0017] Further, a plurality of sealing rings are arranged on the mating surfaces of the joint main body and the drill bit main body.

[0018] Further, the outer wall of the drill bit main body further has a taper surface gradually expanding in diameter towards the joint main body, and the end face of the joint main body insertion end is connected with the taper surface on the joint main body.

[0019] The utility model discloses the beneficial effect is:

[0020] In the utility model, when the drill bit produces axial vibration, the damping element can buffer the axial vibration; when the drill bit produces torsion, the relative torsion between the joint main body and the drill bit main body can be used to eliminate it. That is, the utility model not only can play the axial and circumferential damping, but also can guarantee the safety of the drill bit in the downhole operation, so that the drill bit can effectively reduce the influence of the drill bit vibration on the rotary guide tool during directional operation; meanwhile, the utility model has the advantages of simple structure, convenient processing and convenient disassembly and assembly.

[0021] In the utility model, the spring is used as the damping element, so that when the joint main body drives the drill bit main body to rotate, the joint main body can transmit the torque to the drill bit main body through the spring, which can not only eliminate the circumferential vibration of the drill bit main body, but also automatically reset after the drill bit main body is twisted, thereby guaranteeing the drilling of the drill bit. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings illustrate exemplary embodiments of the present utility model and together with the general description given above, and explained below, serve to explain the principles of the present utility model. These drawings are included to provide a further understanding of the present utility model and are incorporated in and constitute a part of this specification.

[0023] Figure 1 is the structure diagram of the damping drill bit for oil and gas exploitation provided by the utility model;

[0024] Figure 2 is the sectional view of the damping drill bit for oil and gas exploitation provided by the utility model Figure One ;

[0025] Figure 3 is the sectional view of the damping drill bit for oil and gas exploitation provided by the utility model Figure Two ;

[0026] Figure 4 is the structure diagram of the drill bit main body.

[0027] Markings in the drawings and corresponding names of parts:

[0028] 1, joint main body, 2, drill bit main body, 3, damping element, 4, anti-drop structure, 5, sealing ring;

[0029] 11, mounting port, 12, first inner step, 13, second inner step;

[0030] 21, arc-shaped groove, 22, first outer step, 23, second outer step, 24, taper surface;

[0031] 41, arc-shaped cavity, 42, ball, 43, plug. DETAILED DESCRIPTION

[0032] The utility model will be made further detailed explanation below combining with the drawings and implementation. It can be understood that the specific implementation described here is only used for explaining the related content, and is not limited to the utility model. In addition, it needs to be explained that only the part related to the utility model is shown in the drawings for the convenience of description.

[0033] It needs to be explained that the implementation in the utility model and the features in the implementation can be combined with each other without conflict. The utility model will be explained in detail below combining with the drawings and implementation.

[0034] As Figures 1 to 4 The utility model provides a kind of vibration reduction drill bit for oil and gas exploitation, including joint body 1 and drill bit body 2, joint body 1 is set on drill bit body 2, the inner hole of joint body 1 is communicated with the inner hole of drill bit body 2, and joint body 1 is used to connect drill bit body 2 and transmission shaft assembly, after joint body 1 is set on drill bit body 2, drill bit body 2 can be moved along its axial direction on joint body 1.

[0035] To ensure the movement of drill bit body 2, after drill bit body 2 is inserted in joint body 1, damping element 3 is installed in the axial gap between drill bit body 2 and joint body 1, damping element 3 can absorb and consume the vibration generated by drill bit body 2 on the one hand, and on the other hand, damping element 3 can also push drill bit body 2 back to its original position after drill bit body 2 generates displacement, so that drill bit body 2 is always in contact with the formation during cutting, and the cutting effect of the formation is guaranteed.

[0036] Since the drill bit needs to spray mud while cutting during drilling, in order to prevent mud from leaking between joint body 1 and drill bit body 2, a seal is needed between drill bit body 2 and joint body 1.

[0037] In order to prevent drill bit body 2 and joint body 1 from separating, anti-drop structure 4 is also installed on joint body 1 and drill bit body 2, which not only prevents drill bit body 2 and joint body 1 from separating during drilling, but also allows drill bit body 2 and joint body 1 to twist at a certain angle during drilling, and automatically resets after drill bit body 2 and joint body 1 are twisted, so that the twist impact can be absorbed and consumed by the twist of drill bit body 2 and joint body 1 during the twist impact vibration of the drill bit during drilling, thereby reducing the twist impact.

[0038] It should be noted that, in the utility model, the relative torsion between the joint main body 1 and the drill bit main body 2 does not mean that the drill bit main body 2 can rotate relative to the joint main body 1, but means that the drill bit main body 2 can only rotate within a certain angle range on the joint main body 1, and the drill bit main body 2 and the joint main body 1 cannot continue to rotate relative to each other after exceeding the range.

[0039] In order to make the joint main body 1 more stable in the process of driving the drill bit main body 2 to rotate, the anti-falling structure 4 in the utility model is multiple, the multiple anti-falling structures 4 are uniformly and interval arranged along the circumferential direction of the drill bit main body 2, so that the drill bit main body 2 is subjected to more uniform force distribution in the process of being pulled by the anti-falling structure 4, not only can the drill bit main body 2 and the joint main body 1 be further prevented from separating, but also the drill bit main body 2 can be more stable in the process of being twisted.

[0040] In the utility model, the anti-falling structure 4 comprises an arc-shaped groove 21 formed on the inner wall of the joint main body 1 and the outer wall of the drill bit main body 2, the arc-shaped groove 21 extends along the circumferential direction of the drill bit main body 2, and the arc-shaped groove 21 on the joint main body 1 corresponds to the arc-shaped groove 21 on the drill bit main body 2; when the drill bit main body 2 is inserted into the joint main body 1, the two arc-shaped grooves 21 corresponding to each other on the drill bit main body 2 and the joint main body 1 jointly form an arc-shaped cavity 41, the anti-falling piece is installed in the arc-shaped cavity 41, a part of the anti-falling piece is located in the arc-shaped groove 21 on the drill bit main body 2, and another part of the anti-falling piece is located in the arc-shaped groove 21 on the joint main body 1, that is, the anti-falling piece is located in the two arc-shaped grooves 21 corresponding to each other on the drill bit main body 2 and the joint main body 1 at the same time, at this time, since the drill bit main body 2 and the joint main body 1 are simultaneously limited by the anti-falling piece, the drill bit main body 2 and the joint main body 1 cannot be separated.

[0041] In addition, by installing the anti-falling piece in the arc-shaped cavity 41 formed by the two arc-shaped grooves 21, the drill bit main body 2 and the joint main body 1 cannot continue to be twisted after being twisted to a certain angle in the process of being twisted relative to each other, so that the relative rotation between the drill bit main body 2 and the joint main body 1 can be effectively prevented.

[0042] In order to prevent the drill bit main body 2 and the joint main body 1 from being separated while reducing the friction between the drill bit main body 2 and the joint main body 1 when the relative torsion is generated, the anti-falling piece can be a ball 42 installed in the arc-shaped cavity 41, at this time, the depth of the arc-shaped groove 21 on the outer wall of the joint main body 1 and the depth of the arc-shaped groove 21 on the inner wall of the drill bit main body 2 are both less than the diameter of the ball 42, so that after the ball 42 is installed in the arc-shaped cavity 41, a part of the ball 42 is located in the arc-shaped groove 21 on the outer wall of the joint main body 1, and another part of the ball 42 is located in the arc-shaped groove 21 on the inner wall of the drill bit main body 2, so that the ball 42 can prevent the drill bit main body 2 and the joint main body 1 from being separated.

[0043] In order to ensure that the drill bit body 2 and the joint body 1 can be relatively twisted at the same time, after the ball 42 is installed in the arc cavity 41, the arc cavity 41 is still in a state of vacancy, that is, the length of the ball 42 in the arc cavity 41 is less than the length of the arc cavity 41, so that after the ball 42 is installed in the arc cavity 41, the ball 42 can be fully rolled along the length direction of the arc cavity 41, so that the drill bit body 2 and the joint body 1 can be relatively twisted.

[0044] In the utility model, the ball 42 in the arc cavity 41 can be one or more, and the specific number of the ball 42 in the arc cavity 41 can be determined according to the length of the arc cavity 41, the stability of the connection between the drill bit body 2 and the joint body 1 and the like.

[0045] In the utility model, in order to facilitate the installation of the ball 42, the outer circular surface of the joint body 1 is further provided with the installation port 11 which is in communication with the arc cavity 41, the diameter of the installation port 11 is greater than the diameter of the ball 42, so that the ball 42 can be directly put into the arc cavity 41 through the installation port 11 when it needs to be installed, and the installation of the ball 42 is more convenient; in order to prevent the installed ball 42 from rolling out of the installation port 11, and in order to prevent the mud from entering the arc cavity 41 through the installation port 11 during the drilling process, the plug 43 is installed in the installation port 11, the plug 43 is in threaded cooperation with the installation port 11, so that the installation and dismounting of the plug 43 are more convenient.

[0046] In the utility model, in order to further prevent the disengagement between drill bit main body 2 and joint main body 1, the tail of plug 43 can also be extended into the arc-shaped groove 21 on the outer wall of drill bit main body 2 when designing plug 43.When this design is adopted, in order to prevent the tail of plug 43 from colliding with ball 42 in the process of relative torsion of drill bit main body 2 and joint main body 1, the arc-shaped groove 21 on the outer wall of drill bit main body 2 and the arc-shaped groove 21 on the inner wall of joint main body 1 are both set to be wide at one end and narrow at the other end, so that the arc-shaped cavity 41 formed by the two arc-shaped grooves 21 after installation of drill bit main body 2 and joint main body 1 is also wide at one end and narrow at the other end, the wider end of arc-shaped groove 21 to the narrower end of arc-shaped groove 21 is transitioned by a slope, the mounting port 11 corresponds to the wider end of arc-shaped groove 21, and the diameter of plug 43 is adapted to the width of the wider end of arc-shaped groove 21.This design, on the one hand, enables ball 42 to roll in arc-shaped cavity 41 fully after ball 42 enters arc-shaped cavity 41 through mounting port 11, thereby avoiding affecting the installation of the next ball 42; on the other hand, enables plug 43 to push ball 42 into the narrower end of arc-shaped cavity 41 when drill bit main body 2 and joint main body 1 are relatively twisted, and the tail of plug 43 is limited by the transition between the wider end of arc-shaped cavity 41 and the narrower end of arc-shaped cavity 41 when plug 43 pushes ball 42 into the narrower end of arc-shaped cavity 41, thereby avoiding the tail of plug 43 from colliding with ball 42 and avoiding damage to ball 42.

[0047] In the utility model, whether the width of arc-shaped groove 21 is consistent or arc-shaped groove 21 is wide at one end and narrow at the other end, in order to ensure the damping of drill bit axial direction, the minimum width of arc-shaped groove 21 should be slightly larger than the diameter of ball 42; of course, when the damping of drill bit axial direction is not considered, the minimum width of arc-shaped groove 21 can also be adapted to the diameter of ball 42.

[0048] In the utility model, in addition to adopting above anti -drop structure 4, in not considering the friction condition when joint main body 1 and drill bit main body 2 are relatively twisted, anti -drop structure 4 can also include only the arc -shaped groove 21 set up on the outer wall of drill bit main body 2, at this time, the installation of ball 42 can be cancelled, and the tail of plug 43 is extended into arc -shaped groove 21 on the outer wall of drill bit main body 2. Although this structure cannot reduce the friction when joint main body 1 and drill bit main body 2 are relatively twisted, when joint main body 1 and drill bit main body 2 are twisted, the tail of plug 43 and arc -shaped groove 21 are matched, and the separation between drill bit main body 2 and joint main body 1 can also be prevented, and the relative rotation between drill bit main body 2 and joint main body 1 is prevented by the cooperation of the tail of plug 43 and arc -shaped groove 21 at both ends. Of course, without considering the difficulty of installation and processing, the installation positions of arc -shaped groove 21 and plug 43 can be exchanged here, that is, arc -shaped groove 21 is only set up on the inner wall of joint main body 1, plug 43 is installed on drill bit main body 2, and the tail of plug 43 is extended into arc -shaped groove 21 of joint main body 1.

[0049] In the utility model, in order to facilitate the installation of damping element 3, the outer wall of drill bit main body 2 has first outer step 22, and joint main body 1 has first inner step 12, when drill bit main body 2 is inserted on joint main body 1, first outer step 22 and first inner step 12 have a certain spacing, at this time, damping element 3 is installed between first outer step 22 and first inner step 12, and the both ends of damping element 3 are fixed or embedded with first outer step 22 and first inner step 12 respectively, when drill bit main body 2 produces axial vibration, damping element 3 can absorb axial vibration, when drill bit main body 2 and joint main body 1 relatively twist, damping element 3 can be twisted and absorbed, and after the twist of drill bit main body 2 and joint main body 1, damping element 3 can drive the twist of drill bit main body 2 and joint main body 1 to reset by the elasticity of damping element 3.

[0050] The damping element 3 in the utility model is a spring, the spring is sleeved on the drill bit main body 2, and the two ends of the spring are fixed or embedded on the first outer step 22 and the first inner step 12 respectively, so that the stress of the spring is more uniform when the drill bit main body 2 produces axial vibration; at the same time, in order to ensure that the vibration of the drill bit main body 2 and the joint main body 1 when producing relative torsion can be absorbed by the spring, when the spring is installed, the torsion direction of the drill bit main body 2 relative to the joint main body 1 is the spiral direction of the spring, so that the spring is in a torsion state when the drill bit main body 2 and the joint main body 1 produce torsion, at the same time, the joint main body 1 can transmit the torque to the drill bit main body 2 through the cooperation of the spring 3 and the anti-drop structure 4, so that the drill bit main body 2 can rotate; at the same time, the spring can drive the drill bit main body 2 and the joint main body 1 to reset after relative torsion through the torsion of the spring itself. Of course, in the utility model, since the joint main body 1 transmits the torque to the drill bit main body 2 through the spring 3, the spring can also be selected as two or more when the spring is selected, and the spiral directions of the two springs are the same when the two springs are installed.

[0051] In order to avoid the exposure of the damping element 3, after the joint main body 1 and the drill bit main body 2 are installed, the damping element 3 is covered in the joint main body 1, that is, after the joint main body 1 and the drill bit main body 2 are installed, the first outer step 22 is located in the joint main body 1, so that the drill bit surface is more flat after the installation of the drill bit main body 2 and the joint main body 1, the damage of the damping element 3 caused by the mud in the drilling process can be avoided, and the compression and torsion of the damping element 3 caused by the mud in the drilling process can be avoided.

[0052] In the utility model, the joint main body 1 also has a second inner step 13, and the drill bit main body 2 also has a second outer step 23, when the drill bit main body 2 is inserted on the joint main body 1, the insertion end face of the drill bit main body 2 cooperates with the second inner step 13 on the joint main body 1, and the second outer step 23 on the drill bit main body 2 cooperates with the first inner step 12 on the joint main body 1. In order to ensure that the drill bit can realize axial damping, when the drill bit main body 2 is installed, there can be a certain gap between the second outer step 23 on the drill bit main body 2 and the first inner step 12 on the joint main body 1, and between the insertion end face of the drill bit main body 2 and the second inner step 13 on the joint main body 1.

[0053] In the utility model, in order to prevent the drilling head from entering the gap between the outer wall of drilling head main body 2 and the inner wall of joint main body 1 in the drilling process, the end face of the plug-in end of drilling head main body 2 and the outer cylindrical surface of the plug-in end of drilling head main body 2 are all embedded with sealing rings 5; at the same time, the sealing rings 5 on the outer cylindrical surface of the plug-in end of drilling head main body 2 are arranged on the upper and lower sides of the upper arc-shaped groove 21 of drilling head main body 2, and at least one sealing ring 5 is located at the opening of the plug-in end of joint main body 1 close to drilling head main body 2, avoiding the influence of mud entering the gap between the first outer step 22 and the first inner step 12 through the opening of the plug-in end of joint main body 1 on the damping element 3.

[0054] In the utility model, in order to avoid the plug-in end face of joint main body 1 from hindering the drilling of the drilling head, the outer wall of the joint main body further has a tapered surface 24, the diameter of the tapered surface 24 close to one end of joint main body 1 is greater than the diameter of the tapered surface 24 away from one end of joint main body 1, and the end face of the plug-in end of joint main body 1 is connected with the tapered surface 24 on joint main body 1, so that the end face of the plug-in end of joint main body 1 and the tapered surface 24 on joint main body 1 form a complete surface.

[0055] In the utility model, the drilling head main body 2 can also be sleeved on the joint main body 1, at this time, the arc-shaped grooves 21 in the anti-falling structure 4 are respectively arranged on the inner wall of drilling head main body 2 and the outer wall of joint main body 1, the mounting port 11 is arranged on the circumferential surface of drilling head main body 2, the first outer step 22 and the second outer step 23 are arranged on the outer wall of joint main body 1, the first inner step 12 and the second inner step 13 are arranged on the inner wall of drilling head main body 2, and the damping element 3 is sleeved on joint main body 1.

[0056] In the utility model, through the compression and torsion of the damping element 3, the damping element 3 can absorb the axial vibration of the drilling head, the torsion of the damping element 3 can absorb the circumferential vibration of the drilling head, and after the relative torsion of drilling head main body 2 and joint main body 1, the elastic force of the damping element 3 can drive the torsion of drilling head main body 2 and joint main body 1 to reset.

[0057] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples, without contradiction.

[0058] Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present application, and not for limiting the scope of the present application. Based on the above disclosure, other changes or modifications can be made by those skilled in the art, and these changes or modifications are still within the scope of the present application.

Claims

1. A vibration-damping drill bit for use in oil and gas exploration, characterized in that, The drill bit body (2) and the joint body (1) are connected through a joint structure, and the joint structure comprises a joint body (1) and a drill bit body (2) which are connected with each other, a damping element (3) is arranged in the axial gap between the joint body (1) and the drill bit body (2), and a falling prevention structure (4) is arranged on the joint body (1) and the drill bit body (2).

2. The vibration-damping drill bit for use in oil and gas exploration according to claim 1, characterized in that, The falling prevention structure (4) is arranged in multiple numbers, and the multiple falling prevention structures (4) are arranged uniformly along the circumferential direction of the drill bit body (2).

3. The vibration-damping drill bit for use in oil and gas exploration according to claim 1 or 2, characterized in that, The falling prevention structure (4) comprises an arc-shaped groove (21) arranged on the inner wall of the joint body (1) and the outer wall of the drill bit body (2), the joint body (1) and the drill bit body (2) are matched to form an arc-shaped cavity (41) through the arc-shaped groove (21), and a falling prevention element is arranged on the joint body (1) and the drill bit body (2) and located in the arc-shaped cavity (41).

4. The vibration-damping drill bit for use in oil and gas exploration according to claim 3, characterized in that, The arc-shaped cavity (41) is formed by the arc-shaped grooves (21) corresponding to each other on the outer wall of the joint body (1) and the inner wall of the drill bit body (2), and the falling prevention element is a ball (42) arranged in the arc-shaped cavity (41), the length of the ball (42) in the arc-shaped cavity (41) is less than the length of the arc-shaped cavity (41).

5. The vibration-damping drill bit for use in oil and gas exploration according to claim 4, characterized in that, The joint body (1) is further provided with a mounting port (11) for mounting the ball (42) into the arc-shaped cavity (41), and a detachable plug (43) is arranged in the mounting port (11).

6. The vibration-damping drill bit of claims 1 or 2, wherein, The drill bit body (2) is provided with a first outer step (22) on the outer wall, and the joint body (1) is further provided with a first inner step (12), and the damping element (3) is fixed between the first outer step (22) and the first inner step (12).

7. The vibration-damping drill bit of claim 6, wherein, The damping element (3) is a spring, and the damping element (3) is sleeved on the drill bit body (2).

8. The vibration-damping drill bit of claim 6, wherein, The first outer step (22) is located in the joint body (1).

9. The vibration-damping drill bit for use in oil and gas exploration according to claim 6, characterized in that, The joint body (1) is further provided with a second inner step (13), the drill bit body (2) is provided with a second outer step (23), and the end face of the joint end of the drill bit body (2) is matched with the second inner step (13), and the second outer step (23) is matched with the first inner step (12).

10. The vibration-damping drill bit of claim 4, wherein, The drill bit body (2) is further provided with a taper surface (24) which gradually expands in diameter towards the joint body (1), and the end face of the joint end of the joint body (1) is connected with the taper surface (24) on the joint body (1).

Images