Diamond drill bit with expandable aperture

Abstract

The diamond drill bit comprises a supporting rod and a first drill bit body, a connecting assembly is installed at the top end of the supporting rod, the connecting assembly comprises a connecting rod and a bayonet, a reaming assembly is installed on the outer side of the supporting rod and comprises a second drill bit body and a lantern ring, a lifting assembly is installed at the top of the second drill bit body, and the lifting assembly is connected with the connecting rod. The lifting assembly comprises a nut and a connecting ring, the fixing assembly is installed on the outer side of the supporting rod and comprises a clamping sleeve and a supporting plate, the diamond drill bit with the expandable hole diameter can conduct drilling work through the first drill bit and the second drill bit or conduct small-hole-diameter drilling work through the first drill bit, the diamond drill bit with the expandable hole diameter can adapt to drilling work of different hole diameters, and the drilling efficiency is improved. The adaptability of equipment is improved, loosening of the nut and the second drill bit is avoided, work safety of the first drill bit and the second drill bit is guaranteed, the second drill bit is prevented from affecting drilling work of the first drill bit, stability of drilling work is guaranteed, and the drilling device is suitable for drilling work of different hole diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of diamond drill bit equipment, in particular to a diamond drill bit with expandable aperture. Background Art

[0002] When drilling, it is often necessary to use drill bit equipment, among which diamond drill bits are commonly used drilling equipment. The utility model patent with patent application number CN201820633417.5 discloses a diamond drill bit for large-diameter drilling construction. The sharp serrated cutting teeth first contact the formation rock, incisively and grind the formation rock to crack the rock to achieve the purpose of rock breaking, and first drill a small wellbore to serve the purpose of the pilot drill bit; at this time, the cutting block further cuts and crushes the rock broken by the sharp serrated cutting teeth, and continuously expands the hole for drilling; at the drill bit Under high-speed rotating working conditions, the sharp serrated cutting teeth are constantly worn and smoothed, and the broken rock debris can be circulated back to the wellhead with the drilling fluid mud. This arrangement can increase the service life of the drill bit and at the same time improve the drilling rate. According to the disclosed technical solution, when the existing diamond drill bit equipment is in use, on the one hand, it is impossible to adjust the aperture of the drill hole as needed, which reduces the adaptability of the drill bit. On the other hand, when the drill bit is adjusted, it is easy to cause the expansion mechanism to loosen and affect the drilling work of the drill bit, which is not conducive to ensuring the working stability of the drill bit.

[0003] Therefore, how to design a diamond drill bit with expandable aperture has become our current problem to be solved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a diamond drill bit with expandable aperture to solve the problems raised in the above-mentioned background technology. The utility model has a reasonable design, is relatively convenient to use, and is suitable for drilling holes with different apertures.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a diamond drill bit with expandable aperture, comprising a support rod and a drill bit, a connecting assembly is installed on the top of the support rod, and the connecting assembly includes a connecting rod and a bayonet, a hole expansion assembly is installed on the outside of the support rod, and the hole expansion assembly includes a drill bit 2 and a collar, a lifting assembly is installed on the top of the drill bit 2, and the lifting assembly includes a nut and a connecting ring, a fixing assembly is installed on the outside of the support rod, and the fixing assembly includes a jacket and a support plate, a locking assembly is installed on the inside of the nut, and the locking assembly includes a latch and a spring 2, and a limiting assembly is arranged on the outside of the support rod, and the limiting assembly includes a section and a plane.

[0006] Furthermore, the drill bit is integrally formed on the outer side of the bottom end of the support rod, the connecting rod is integrally formed on the top end of the support rod, and the bayonet is opened on the inner side of the connecting rod.

[0007] Furthermore, the section is opened on the outer side of the support rod, the second drill bit is sleeved on the outer side of the support rod, the plane is opened on the inner side of the second drill bit, and the plane is sleeved on the outer side of the section.

[0008] Furthermore, the sleeve ring is welded to the top of the drill bit 2, the connecting ring is integrally formed at the bottom of the nut, and the connecting ring is installed on the inner side of the sleeve ring through a bearing.

[0009] Furthermore, both sides of the support rod are provided with external threads, and the inner side of the nut is provided with internal threads, and the external threads match the internal threads.

[0010] Furthermore, the support plate is welded to the outer side of the support rod, the top of the jacket is connected to the bottom of the support plate through a spring, the jacket is sleeved on the outer side of the support rod, and the jacket cooperates with the nut.

[0011] Furthermore, a through opening is provided on the inner side of the nut, the top end of the insertion rod is clamped on the top of the nut, and a socket is provided on the top of the collar.

[0012] Furthermore, the bottom end of the insertion rod passes through the through opening and extends to the inner side of the socket, the socket is evenly distributed on the ring, and the insertion rod is connected to the inner wall of the through opening through a second spring.

[0013] Beneficial effects: 1. When the aperture-expandable diamond drill bit is working, when large-diameter drilling is required, the nut is rotated, and the nut moves downward through the cooperation of the internal thread and the external thread, and then drives the drill bit 2 to move downward to the top of the drill bit 1 through the link and the ring, and the drill bit 1 and the drill bit 2 are used to perform drilling work, which is convenient for large-diameter drilling work. When small-diameter drilling work is required, the nut is rotated in the opposite direction, and the nut drives the drill bit 2 to move upward to the top of the support rod, and the drill bit 1 is used to perform small-diameter drilling work. It can adapt to drilling work of different apertures and improve the adaptability of the equipment.

[0014] 2. The aperture-expandable diamond drill bit provides torque through the cut surface on the support rod and the plane inside the drill bit when the drill bit is working, so as to prevent the drill bit from rotating. The pin on the nut is clamped on the inner side of the socket on the collar under the elastic force of the spring two, thereby effectively preventing the nut from rotating, and further preventing the nut and the drill bit from loosening, thereby ensuring the working safety of the drill bit one and the drill bit two. When it is necessary to move the drill bit two upward to the top of the support rod, first pull the pin upward, turn the nut, and then squeeze the sleeve upward. After the nut moves upward to the top of the support rod, release the sleeve, and the spring one pushes the sleeve downward under the support of the support plate. The sleeve is arranged on the outer side of the nut to prevent the nut from loosening, thereby effectively preventing the drill bit two from affecting the drilling work of the drill bit one, thereby ensuring the stability of the drilling work.

[0015] 3. The diameter-expandable diamond drill bit is reasonably designed, efficient and convenient to use, and is suitable for drilling holes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a diamond drill bit with expandable aperture according to the utility model;

[0017] Figure 2 This is a cross-sectional view of a diamond drill bit with expandable aperture according to the utility model;

[0018] Figure 3 This is a cross-sectional view of a pin of a diamond drill bit with expandable aperture according to the utility model;

[0019] Figure 4 This is a structural schematic diagram of a drill bit 2 of a diamond drill bit with expandable aperture according to the utility model;

[0020] In the figure: 1. support rod; 2. drill bit 1; 3. connecting rod; 4. bayonet; 5. drill bit 2; 6. section; 7. plane; 8. collar; 9. link; 10. nut; 11. external thread; 12. internal thread; 13. jacket; 14. support plate; 15. spring 1; 16. plug rod; 17. spring 2; 18. socket. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4The utility model provides a technical solution: a diamond drill bit with expandable aperture, comprising a support rod 1 and a drill bit 2, a connecting assembly is installed at the top of the support rod 1, the connecting assembly comprises a connecting rod 3 and a bayonet 4, a hole reaming assembly is installed on the outside of the support rod 1, the hole reaming assembly comprises a drill bit 2 5 and a collar 8, a lifting assembly is installed on the top of the drill bit 2 5, the lifting assembly comprises a nut 10 and a link 9, a fixing assembly is installed on the outside of the support rod 1, the fixing assembly comprises a jacket 13 and a support plate 14, a locking assembly is installed on the inside of the nut 10, the locking assembly comprises a latch 16 and a spring 2 17, a limiting assembly is arranged on the outside of the support rod 1, the limiting assembly comprises a cutting surface 6 and a plane 7, the cutting surface 6 is opened on the outer side of the support rod 1, the drill bit 2 5 is sleeved on the outer side of the support rod 1, the plane 7 is opened on the inner side of the drill bit 2 5, and the plane 7 is sleeved on the outer side of the cutting surface 6 The collar 8 is welded on the top of the drill bit 2 5, and the link 9 is integrally formed at the bottom of the nut 10. The link 9 is installed on the inner side of the collar 8 through a bearing. External threads 11 are provided on both sides of the support rod 1, and an internal thread 12 is provided on the inner side of the nut 10. The external threads 11 cooperate with the internal threads 12. During work, when large-diameter drilling is required, the nut 10 is rotated, and the nut 10 moves downward through the cooperation of the internal thread 12 and the external thread 11, and then the drill bit 2 5 is driven downward to the top of the drill bit 1 2 through the link 9 and the collar 8, and the drill bit 1 2 and the drill bit 2 5 are used to perform drilling work, which is convenient for large-diameter drilling work. When small-diameter drilling work is required, the nut 10 is rotated in the opposite direction, and the nut 10 drives the drill bit 2 5 to move upward to the top of the support rod 1, and the drill bit 2 is used to perform small-diameter drilling work, which can adapt to drilling work of different diameters and improve the adaptability of the equipment.

[0023] In this embodiment, the drill bit 2 is integrally formed on the outer side of the bottom end of the support rod 1, the connecting rod 3 is integrally formed on the top end of the support rod 1, the bayonet 4 is opened on the inner side of the connecting rod 3, the support plate 14 is welded on the outer side of the support rod 1, the top of the jacket 13 is connected to the bottom of the support plate 14 through a spring 15, the jacket 13 is sleeved on the outer side of the support rod 1, the jacket 13 cooperates with the nut 10, a through opening is opened on the inner side of the nut 10, the top of the insertion rod 16 is stuck in the top of the nut 10, the top of the collar 8 is opened with a socket 18, the bottom end of the insertion rod 16 passes through the through opening and extends to the inner side of the socket 18, the socket 18 is evenly distributed on the collar 8, the insertion rod 16 is connected to the inner wall of the through opening through a spring 2 17, when the drill bit 2 5 is moved downward to the top of the drill bit 2, the drill bit 2 5 is working, through The cut surface 6 on the support rod 1 and the plane 7 inside the drill bit 2 5 provide torque to prevent the drill bit 2 5 from rotating. The pin 16 on the nut 10 is clamped on the inner side of the socket 18 on the collar 8 under the elastic force of the spring 2 17, thereby effectively preventing the nut 10 from rotating, and further preventing the nut 10 and the drill bit 2 5 from loosening, thereby ensuring the working safety of the drill bit 1 2 and the drill bit 2 5. When it is necessary to move the drill bit 2 5 upward to the top of the support rod 1, first pull the pin 16 upward, rotate the nut 10, and then squeeze the sleeve 13 upward. When the nut 10 moves upward to the top of the support rod 1, release the sleeve 13, and the spring 15 pushes the sleeve 13 downward under the support of the support plate 14. The sleeve 13 is sleeved on the outer side of the nut 10 to prevent the nut 10 from loosening, thereby effectively preventing the drill bit 2 5 from affecting the drilling work of the drill bit 2, thereby ensuring the stability of the drilling work.

[0024] When the aperture-expandable diamond drill bit is in use, when it is necessary to drill a large aperture, the nut 10 is rotated, and the nut 10 moves downward through the cooperation of the internal thread 12 and the external thread 11, and then drives the drill bit 2 5 to move downward to the top of the drill bit 1 2 through the link 9 and the collar 8, and the drill bit 1 2 and the drill bit 2 5 are used to perform drilling work, which is convenient for drilling a large aperture. When it is necessary to drill a small aperture, the nut 10 is rotated in the opposite direction, and the nut 10 drives the drill bit 2 5 to move upward to the top of the support rod 1, and the drill bit 2 is used to perform drilling work of a small aperture. It can adapt to drilling work of different apertures and improve the adaptability of the equipment. When the drill bit 2 5 is moved downward to the top of the drill bit 2, when the drill bit 2 5 is working, the cut surface 6 on the support rod 1 and the plane 7 inside the drill bit 2 5 provide Torque, to prevent the drill bit 2 5 from rotating, the pin 16 on the nut 10 is clamped on the inner side of the socket 18 on the collar 8 under the elastic force of the spring 2 17, thereby effectively preventing the nut 10 from rotating, and then preventing the nut 10 and the drill bit 2 5 from loosening, ensuring the working safety of the drill bit 1 2 and the drill bit 2 5. When it is necessary to move the drill bit 2 5 upward to the top of the support rod 1, first pull the pin 16 upward, rotate the nut 10, and then squeeze the sleeve 13 upward. When the nut 10 moves upward to the top of the support rod 1, release the sleeve 13, and the spring 15 pushes the sleeve 13 downward under the support of the support plate 14. The sleeve 13 is sleeved on the outer side of the nut 10 to prevent the nut 10 from loosening, thereby effectively preventing the drill bit 2 5 from affecting the drilling work of the drill bit 2, and ensuring the stability of the drilling work.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A diamond drill bit with expandable aperture, comprising a support rod (1) and a drill bit (2), wherein a connecting assembly is installed at the top of the support rod (1), and the connecting assembly comprises a connecting rod (3) and a bayonet (4), characterized in that: The outer side of the support rod (1) is provided with a hole reaming assembly, the hole reaming assembly comprises a drill bit 2 (5) and a collar (8), the top of the drill bit 2 (5) is provided with a lifting assembly, the lifting assembly comprises a nut (10) and a link (9), the outer side of the support rod (1) is provided with a fixing assembly, the fixing assembly comprises a jacket (13) and a support plate (14), the inner side of the nut (10) is provided with a locking assembly, the locking assembly comprises an insert rod (16) and a spring 2 (17), and the outer side of the support rod (1) is provided with a limiting assembly, the limiting assembly comprises a section (6) and a plane (7).

2. The diamond drill bit with expandable aperture according to claim 1, characterized in that: The drill bit 1 (2) is integrally formed on the outer side of the bottom end of the support rod (1), the connecting rod (3) is integrally formed on the top end of the support rod (1), and the bayonet (4) is arranged on the inner side of the connecting rod (3).

3. The diamond drill bit with expandable aperture according to claim 2, characterized in that: The cut surface (6) is formed on the outer side of the support rod (1), the second drill bit (5) is sleeved on the outer side of the support rod (1), the plane (7) is formed on the inner side of the second drill bit (5), and the plane (7) is sleeved on the outer side of the cut surface (6).

4. The diamond drill bit with expandable aperture according to claim 3, characterized in that: The sleeve ring (8) is welded to the top of the drill bit 2 (5), and the connecting ring (9) is integrally formed at the bottom of the nut (10). The connecting ring (9) is installed on the inner side of the sleeve ring (8) through a bearing.

5. The diamond drill bit with expandable aperture according to claim 1, characterized in that: External threads (11) are provided on both sides of the support rod (1), and internal threads (12) are provided on the inner side of the nut (10), and the external threads (11) match the internal threads (12).

6. The diamond drill bit with expandable aperture according to claim 5, characterized in that: The support plate (14) is welded to the outer side of the support rod (1), the top of the jacket (13) is connected to the bottom of the support plate (14) through a spring (15), the jacket (13) is sleeved on the outer side of the support rod (1), and the jacket (13) is matched with the nut (10).

7. The diamond drill bit with expandable aperture according to claim 6, characterized in that: A through opening is provided on the inner side of the nut (10), the top end of the insertion rod (16) is clamped on the top of the nut (10), and a socket (18) is provided on the top of the collar (8).

8. The diamond drill bit with expandable aperture according to claim 7, characterized in that: The bottom end of the insertion rod (16) passes through the through opening and extends to the inner side of the socket (18), and the socket (18) is evenly distributed on the collar (8). The insertion rod (16) is connected to the inner wall of the through opening via a second spring (17).

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