Detachable PDC (Polycrystalline Diamond Compact) drill bit

Abstract

The utility model provides a detachable PDC (Polycrystalline Diamond Compact) drill bit, which relates to the technical field of drilling equipment, and comprises a drill bit assembly, a drill bit assembly and a drill bit, the hoop assembly is composed of two arc-shaped covers arranged on the outer side of the drill bit base in a sleeving mode, clamping grooves are formed in the arc-shaped covers, the ends, away from each other, of the two arc-shaped covers are slidably connected with concave limiting frames, and due to the fact that the drill bit base is of a split structure, the damaged drill bit base can be directly replaced according to needs in the using process; two adjacent drill bit seats are clamped and limited through limiting grooves and limiting blocks, so that the connecting strength after the drill bit seats are combined is improved, displacement of the four drill bit seats in the rotating process is avoided, the four drill bit seats are further limited under the action of a hoop assembly, and the drilling efficiency is improved. And the multiple drill bit seats can be quickly mounted and dismounted through the hoop assembly, so that the working efficiency during replacement is improved.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, and in particular to a detachable PDC drill bit. Background Technology

[0002] PDC drill bits are widely used in the exploration and extraction of resources such as oil and natural gas due to their high cutting performance.

[0003] Traditional PDC drill bits typically employ an integral structure. During use, if some cutting edges wear out severely due to high-intensity operation, or if a part of the drill bit is accidentally damaged, even if other parts can still function normally, the entire drill bit must be replaced. As a result, a large amount of usable material is discarded, causing a huge waste of resources. Moreover, frequent drill bit replacements significantly increase drilling costs.

[0004] Furthermore, in the transportation and storage stages, integral drill bits occupy too much space due to their large size. This not only causes many inconveniences in logistics management but also increases warehousing costs.

[0005] Therefore, this utility model proposes a detachable PDC drill bit. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies and propose a detachable PDC drill bit.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a detachable PDC drill bit, comprising:

[0008] The drill bit assembly consists of four annularly distributed drill bit seats, one side of which has a limiting groove.

[0009] The clamp assembly consists of two arc-shaped covers fitted onto the outside of the drill bit holder. Each arc-shaped cover has a snap-fit ​​groove inside. Each of the two arc-shaped covers is slidably connected to a concave limiting frame at the ends that are far apart from each other. The concave limiting frame is provided with a fixing bolt that penetrates through the arc-shaped cover.

[0010] Furthermore, a limiting block is provided on the other side of the drill bit holder, and two adjacent drill bit holders are interlocked with each other through a limiting groove and a limiting block. A fixing groove is provided on the top of each of the four drill bit holders, and a locking strip is provided on the outer side of each of the four drill bit holders.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the mutual interlocking of the limiting block and the limiting groove makes the adjacent drill bit seats tightly connected, which greatly improves the overall structural stability, effectively avoids relative shaking during operation, ensures drilling accuracy, the top fixing groove facilitates stable connection with other components, expands the application scenarios, and the outer interlocking strip enhances the connection strength, reduces the risk of component damage, extends the service life of the equipment, and lays a solid foundation for efficient drilling operations.

[0012] Furthermore, the arc-shaped covers are interlocked with each other via snap-fit ​​grooves and snap-fit ​​strips, and the inner diameters of the two arc-shaped covers are adapted to the outer wall diameters of the four drill bit holders.

[0013] The beneficial effects of adopting the above-mentioned further solution are: the arc-shaped cover is snapped into place by the snap-fit ​​groove and the snap-fit ​​strip, making installation convenient and stable; the arc-shaped cover limits the drill bit seat, preventing the four drill bit seats from separating during use; its internal diameter is adapted to the outer wall of the drill bit seat, allowing for a tight fit.

[0014] Furthermore, the connector assembly consists of a limiting sleeve and a connecting sleeve that are snapped into the drill bit holder. The connecting sleeve is fitted onto the outside of the limiting sleeve, and a retaining plate is provided at the bottom of the limiting sleeve. The limiting sleeve is snapped into the fixing groove through the retaining plate.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: the connector assembly is ingeniously designed, the limiting sleeve is securely locked in the fixing groove by the retaining plate to ensure accurate installation and positioning, the connecting sleeve is fitted on the outside and works in conjunction with the limiting sleeve to enhance the connection firmness. This component makes the drill bit seat tightly connected, can effectively transmit power during operation, reduce shaking and deviation, ensure stable drilling operations, improve drilling quality and efficiency, extend the service life of equipment, and provide reliable support for drilling operations.

[0016] Furthermore, a threaded groove is provided on the limiting sleeve above the connecting sleeve, and a fixing sleeve is threadedly connected to the threaded groove.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the threaded groove on the limiting sleeve cooperates with the fixed sleeve, and by rotating the fixed sleeve, the tightness between it and the connecting sleeve can be flexibly adjusted, effectively preventing the connecting sleeve from loosening accidentally. This design enhances the overall stability of the connector assembly, ensures stable power transmission, reduces vibration and displacement caused by loose parts, ensures continuous, accurate and efficient drilling operations, reduces the risk of equipment failure, and extends the service life of the equipment.

[0018] Furthermore, the connecting sleeve and the limiting sleeve are interlocked with each other, the limiting sleeve is provided with a strip block on the outside, and the connecting sleeve is provided with a groove that interlocks with the strip block inside.

[0019] The beneficial effects of adopting the above-mentioned further solution are as follows: the connecting sleeve and the limiting sleeve are engaged by the strip block and the groove, which fits tightly. This design can accurately limit the relative position of the two, avoid misalignment and torsion during operation, ensure stable power transmission, enhance the shear resistance of the connecting structure, effectively reduce component wear, extend the service life of the equipment, and improve the overall reliability of the equipment operation, providing a strong guarantee for the efficient and safe drilling operation.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] 1. In this utility model, since the drill bit holders are of a split structure, damaged drill bit holders can be directly replaced as needed during use. Furthermore, adjacent drill bit holders are mutually locked and limited by limiting grooves and limiting blocks, which improves the connection strength of the drill bit holders after assembly and prevents displacement of the four drill bit holders during rotation. In addition, the four drill bit holders are limited by the sleeve assembly, and the sleeve assembly enables the quick installation and disassembly of multiple drill bit holders, thereby improving the work efficiency during replacement.

[0022] 2. In this utility model, the connector assembly and the drill bit assembly are also separate structures. During the installation process, the limiting sleeve is first snapped onto the top of the four drill bit seats, so that the snapping plate and the fixing groove are snapped together to limit the movement and prevent the limiting sleeve from rotating in the drill bit seat after assembly. Then, the connecting sleeve is put on the limiting sleeve and the connecting sleeve is threadedly connected to the threaded groove to install and fix the connector assembly. Attached Figure Description

[0023] Figure 1 This is a front view of a detachable PDC drill bit according to the present invention;

[0024] Figure 2 This is a disassembled diagram of a detachable PDC drill bit according to the present invention;

[0025] Figure 3 This is a disassembled view of the drill bit assembly in a detachable PDC drill bit according to this utility model;

[0026] Figure 4 This is a disassembled view of the clamp assembly in a detachable PDC drill bit according to this utility model;

[0027] Figure 5 This is a split view of the connector assembly in a detachable PDC drill bit according to this utility model.

[0028] Figure Labels

[0029] 1. Drill bit assembly; 11. Drill bit holder; 12. Limiting groove; 13. Limiting block; 14. Connecting strip; 15. Limiting groove;

[0030] 2. Hoop assembly; 21. Arc-shaped cover; 22. Snap-fit ​​groove; 23. Concave limiting bracket; 24. Fixing bolt;

[0031] 3. Connector assembly; 31. Connecting sleeve; 32. Limiting sleeve; 33. Snap-fit ​​plate; 34. Threaded groove; 35. Fixing sleeve. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1-5 As shown, this utility model provides a technical solution: a detachable PDC drill bit, comprising:

[0034] The drill bit assembly 1 consists of four annularly distributed drill bit seats 11. Each drill bit seat 11 has a limiting groove 12 on one side and a limiting block 13 on the other side. Adjacent drill bit seats 11 are interlocked via the limiting groove 12 and the limiting block 13. Each of the four drill bit seats 11 has a fixing groove 15 on its top and a snap-fit ​​strip 14 on its outer side. Since the drill bit seats 11 are modular, damaged drill bit seats 11 can be directly replaced as needed during use. Furthermore, the interlocking of adjacent drill bit seats 11 via the limiting groove 12 and the limiting block 13 enhances the connection strength of the assembled drill bit seats 11 and prevents displacement of the four drill bit seats 11 during rotation. Additionally, the clamping assembly 2 further limits the positioning of the four drill bit seats 11 and enables rapid installation and removal of multiple drill bit seats 11, thereby improving work efficiency during replacement.

[0035] The sleeve assembly 2 consists of two arc-shaped covers 21 fitted on the outside of the drill bit seat 11. The arc-shaped covers 21 have a snap-fit ​​groove 22 inside. The ends of the two arc-shaped covers 21 that are far apart from each other are slidably connected to concave limiting frames 23. The concave limiting frames 23 are provided with fixing bolts 24 that penetrate the arc-shaped covers 21.

[0036] Furthermore, such as Figure 2 - Figure 5As shown: Connector assembly 3, which consists of a limiting sleeve 32 and a connecting sleeve 31 that are snapped into the drill bit holder 11. The connecting sleeve 31 is fitted onto the outside of the limiting sleeve 32. The bottom of the limiting sleeve 32 is provided with a snap-fit ​​plate 33. The limiting sleeve 32 is snapped into the fixing groove 15 through the snap-fit ​​plate 33. A threaded groove 34 is opened on the limiting sleeve 32 above the connecting sleeve 31. A fixing sleeve 35 is threadedly connected to the threaded groove 34. The connector assembly 3 and the drill bit assembly 1 are also separate structures. During the installation process, the limiting sleeve 32 is first snapped onto the top of the four drill bit holders 11, so that the snap-fit ​​plate 33 and the fixing groove 15 are mutually snapped and limited to prevent the limiting sleeve 32 from rotating in the drill bit holder 11 after assembly. Then, the connecting sleeve 31 is fitted onto the limiting sleeve 32 and threadedly connected to the threaded groove 34 through the fixing sleeve 35, so that the connector assembly 3 is installed and fixed.

[0037] The above solution also has the problem of the four drill bit holders 11 becoming misaligned and separating during rotation, such as... Figure 4 As shown: In this solution, the arc-shaped cover 21 is interlocked with the snap-fit ​​strip 14 through the snap-fit ​​groove 22. The inner diameter of the two arc-shaped covers 21 is adapted to the outer diameter of the four drill bit holders 11. The arc-shaped cover 21 is snapped with the snap-fit ​​strip 14 through the snap-fit ​​groove 22, which is convenient and stable to install. The arc-shaped cover 21 limits the drill bit holder 11 and prevents the four drill bit holders 11 from separating during use. Its inner diameter is adapted to the outer wall of the drill bit holder 11 and can fit tightly.

[0038] The above solutions also have the problem of the connecting sleeve 31 rotating on the limiting sleeve 32 during the rotation process, such as... Figure 5 As shown: In this design, the connecting sleeve 31 and the limiting sleeve 32 are interlocked. A strip block is provided on the outer side of the limiting sleeve 32, and a groove is provided inside the connecting sleeve 31 to interlock with the strip block. The connecting sleeve 31 and the limiting sleeve 32 are interlocked by the strip block and the groove, and fit tightly. This design can accurately limit the relative position of the two, avoid misalignment and torsion during operation, ensure stable power transmission, enhance the shear resistance of the connection structure, effectively reduce component wear, extend the service life of the equipment, and improve the overall reliability of equipment operation, providing a strong guarantee for the efficient and safe drilling operation.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A detachable PDC drill bit, characterized in that, include: The drill bit assembly (1) consists of four annularly distributed drill bit seats (11), and a limiting groove (12) is provided on one side of each drill bit seat (11). The sleeve assembly (2) consists of two arc-shaped covers (21) fitted on the outside of the drill bit seat (11). The arc-shaped covers (21) have a snap-fit ​​groove (22) inside. The two arc-shaped covers (21) are slidably connected to concave limiting frames (23) at their far ends. The concave limiting frames (23) are provided with fixing bolts (24) that penetrate the arc-shaped covers (21).

2. The detachable PDC drill bit according to claim 1, characterized in that: A limiting block (13) is provided on the other side of the drill bit holder (11). Two adjacent drill bit holders (11) are connected to each other by a limiting groove (12) and a limiting block (13). A fixing groove (15) is provided on the top of each of the four drill bit holders (11). A snap-fit ​​strip (14) is provided on the outer side of each of the four drill bit holders (11).

3. The detachable PDC drill bit according to claim 1, characterized in that: The arc-shaped cover (21) is interlocked with the snap-fit ​​strip (14) through the snap-fit ​​groove (22), and the inner diameter of the two arc-shaped covers (21) is adapted to the outer wall diameter of the four drill bit seats (11).

4. The detachable PDC drill bit according to claim 1, characterized in that: The connector assembly (3) consists of a limiting sleeve (32) and a connecting sleeve (31) that are snapped into the drill bit holder (11). The connecting sleeve (31) is sleeved on the outside of the limiting sleeve (32). The bottom of the limiting sleeve (32) is provided with a snap-fit ​​plate (33). The limiting sleeve (32) is snapped into the fixing groove (15) by the snap-fit ​​plate (33).

5. A detachable PDC drill bit according to claim 4, characterized in that: The limiting sleeve (32) has a threaded groove (34) above the connecting sleeve (31), and a fixing sleeve (35) is threadedly connected to the threaded groove (34).

6. A detachable PDC drill bit according to claim 4, characterized in that: The connecting sleeve (31) and the limiting sleeve (32) are engaged with each other. A strip block is provided on the outside of the limiting sleeve (32), and a groove is provided inside the connecting sleeve (31) to engage with the strip block.

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