PDC drill bit with damping function

Abstract

The utility model discloses a PDC drill bit with a damping function, and relates to the technical field of PDC drill bits, the PDC drill bit comprises a joint main body, a drill bit main body is arranged in the joint main body in a sliding mode, a damping disc is rotatably installed at the position, close to the top, in the joint main body, and a plurality of sets of sliding blocks are fixed to the side wall of the damping disc. Sliding columns are arranged at the bottoms of the sliding blocks in a penetrating mode, multiple sets of damping springs are arranged at the upper end of the damping disc, dampers are arranged in the damping springs in a sleeved mode, and multiple sets of guide blocks are installed at the bottom of the interior of the connector body. The PDC drill bit has the advantages that the PDC drill bit can reduce vibration generated during operation of the drill bit main body and the drill bit end, so that the PDC drill bit cannot be damaged or shifted, the service life of the PDC drill bit is prolonged, the PDC drill bit can quickly assemble and disassemble the joint main body and the drill bit main body, and the drill bit main body is convenient to maintain and replace.

Description

Technical Field

[0001] This utility model relates to the field of PDC drill bit technology, specifically a PDC drill bit with shock absorption function. Background Technology

[0002] Drilling is an important means and link in the exploration and development of oil and gas. PDC drill bits are an indispensable drilling tool in the geological drilling industry. The proper selection of drill bits has a huge impact on the quality of oil drilling, drilling speed and drilling cost. PDC drill bits are short for polycrystalline diamond composite drill bits, also called polycrystalline diamond cutting block drill bits or composite tooth drill bits.

[0003] A search revealed that PDC drill bits, disclosed in publication number CN112302542B, can be used in oil and gas exploration and development in deep wells, ultra-deep wells, and large-diameter well sections to improve drilling speed and extend drill bit life. However, the drill bit will vibrate during operation, which can cause the PDC drill bit to deviate and lead to PDC damage. Therefore, we propose a PDC drill bit with vibration reduction function. Utility Model Content

[0004] The purpose of this invention is to provide a PDC drill bit with shock absorption function.

[0005] To address the problems mentioned in the background art, this utility model provides the following technical solution: a PDC drill bit with shock absorption function, comprising a connector body, a drill bit body sliding inside the connector body, a shock absorber plate rotatably installed near the top inside the connector body, multiple sets of sliding blocks fixed to the side wall of the shock absorber plate, a sliding column penetrating the bottom of each sliding block, multiple sets of shock absorber springs installed at the upper end of the shock absorber plate, a damper sleeved inside each shock absorber spring, multiple sets of guide blocks installed at the bottom inside the connector body, multiple sets of guide grooves opened on the side wall of the drill bit body, multiple sets of drill bit ends fixed on the side wall of the drill bit body, a flow tube penetrating through the center of the upper end of the connector body, flow channels installed inside the drill bit body, and a spray hole opened at the bottom of each drill bit end.

[0006] Preferably, the sliding block is slidably connected to the connector body, the sliding block is slidably connected to the sliding column, and both the sliding block and the sliding column are located inside the connector body.

[0007] Preferably, the number of damping springs is eight, the number of dampers is eight, and both the damping springs and dampers are located inside the joint body.

[0008] Preferably, the drill bit body is slidably connected to the guide blocks via guide grooves, and the number of guide blocks is four, while the number of drill bit ends is five.

[0009] Preferably, the side wall of the connector body is rotatably provided with multiple sets of gear columns, the inside of the connector body is rotatably provided with a limit ring near the center, the inner side of the limit ring is fixed with a gear disk, the lower end of the gear disk is fixed with multiple sets of insert plates, and the upper end of the drill bit body is fixed with multiple sets of fixing plates.

[0010] Preferably, the gear column is meshed with the gear disk, the gear disk is located inside the connector body, and the gear disk is rotatably connected to the connector body through a limiting ring.

[0011] Preferably, one end of the drill bit body passes through the gear disk, and the drill bit body is rotatably connected to the gear disk.

[0012] By adopting the above technical solution, the cooperation of the guide block and the guide groove ensures that the drill bit body will not shift when vibrating and will move horizontally, causing the drill bit body to impact the damping disc. Then, with the cooperation of the damping spring and the damper, the damping disc and the drill bit body can be damped. Furthermore, the cooperation of the sliding block and the sliding column makes the lifting and lowering of the damping disc more stable. This allows the PDC drill bit to dampen the vibration generated by the drill bit body and the drill bit end during operation, preventing the PDC drill bit from being damaged or shifting, and improving the service life of the PDC drill bit.

[0013] By adopting the above technical solution, the gear column, gear disk and limiting ring cooperate to drive the insert plate to move, so that the insert plate can be inserted into the fixed plate, thereby completing the installation of the drill bit body and the connector body connected to the fixed plate. Conversely, disassembly is also possible, allowing the PDC drill bit to quickly install and remove the connector body and the drill bit body, which is convenient for the maintenance and replacement of the drill bit body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure in an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the shock absorber and the damper in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the drill bit body and the fixing plate in an embodiment of this utility model.

[0018] In the diagram: 1. Connector body; 2. Drill bit body; 3. Shock absorber plate; 4. Sliding block; 5. Sliding column; 6. Shock absorber spring; 7. Damper; 8. Guide block; 9. Guide groove; 10. Drill bit end; 11. First flow channel; 12. Second flow channel; 13. Spray hole; 14. Gear column; 15. Limiting ring; 16. Gear disc; 17. Insert plate; 18. Fixing plate. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1:

[0021] Please see Figure 1-4 This utility model provides a technical solution: a PDC drill bit with shock absorption function, including a connector body 1, a drill bit body 2 sliding inside the connector body 1, a shock absorber 3 rotatably installed near the top inside the connector body 1, multiple sets of sliding blocks 4 fixed to the side wall of the shock absorber 3, sliding columns 5 penetrating the bottom of each sliding block 4, multiple sets of shock absorber springs 6 at the upper end of the shock absorber 3, dampers 7 sleeved inside each shock absorber spring 6, multiple sets of guide blocks 8 installed at the bottom inside the connector body 1, multiple sets of guide grooves 9 opened on the side wall of the drill bit body 2, multiple sets of drill bit ends 10 fixed on the side wall of the drill bit body 2, a flow tube 11 penetrating through the center of the upper end of the connector body 1, flow channels 12 installed inside each drill bit body 2, and a spray hole 13 opened at the bottom of the drill bit end 10.

[0022] The sliding block 4 is slidably connected to the connector body 1, and the sliding block 4 is slidably connected to the sliding column 5, and both the sliding block 4 and the sliding column 5 are located inside the connector body 1.

[0023] There are eight shock-absorbing springs 6 and eight dampers 7, and both shock-absorbing springs 6 and dampers 7 are located inside the joint body 1.

[0024] The drill bit body 2 is slidably connected to the guide block 8 via the guide groove 9. There are four guide blocks 8 and five drill bit ends 10.

[0025] Specifically, during operation of the drill bit body 2 and the drill bit end 10 on the side wall of the drill bit body 2, the drill bit end 10 contacts the ground, causing the drill bit end 10 to drive the drill bit body 2 to vibrate. Then, during vibration, the drill bit body 2 slides upward in the joint body 1. At the same time, the drill bit body 2 slides on the guide block 8 through the guide groove 9, preventing the drill bit body 2 from shifting. Then, the top of the drill bit body 2 collides with the shock absorber 3, and the shock absorber 3 drives the sliding block 4 to slide inside the joint body 1. With the cooperation of the sliding column 5, the rise and fall of the shock absorber 3 is more stable. Then, the shock absorber 3 compresses the shock absorber spring 6. Under the elasticity of the shock absorber spring 6 and the action of the damper 7, the impact force is buffered, preventing the drill bit end 10 from being damaged or shifted. This allows the PDC drill bit to dampen the vibration generated by the operation of the drill bit body 2 and the drill bit end 10, preventing damage or shifting of the PDC drill bit and improving its service life.

[0026] Example 2:

[0027] Please see Figure 1-4 This utility model provides a technical solution: a PDC drill bit with shock absorption function, wherein multiple sets of gear columns 14 are rotatably arranged on the side wall of the connector body 1, a limit ring 15 is rotatably arranged near the center inside the connector body 1, a gear disk 16 is fixed on the inner side of the limit ring 15, multiple sets of insert plates 17 are fixed at the lower end of the gear disk 16, and multiple sets of fixing plates 18 are fixed at the upper end of the drill bit body 2.

[0028] The gear column 14 is meshed with the gear disk 16, which is located inside the connector body 1 and is rotatably connected to the connector body 1 through the limiting ring 15.

[0029] One end of the drill bit body 2 passes through the gear disk 16, and the drill bit body 2 is rotatably connected to the gear disk 16.

[0030] Specifically, when installing the drill bit body 2, the drill bit body 2 is inserted into the connector body 1, and the guide groove 9 on the side wall of the drill bit body 2 is engaged with the guide block 8. The process stops when the top of the drill bit body 2 is in contact with the bottom of the shock absorber 3. Then, a hex wrench is inserted into the gear column 14, which rotates clockwise. When the gear column 14 rotates, it drives the gear disc 16 to rotate the limiting ring 15 inside the connector body 1. Then, the gear disc 16 drives the insert plate 17 to rotate, and the insert plate 17 is inserted into the fixing plate 18, thereby connecting and fixing the connector body 1 and the drill bit body 2. Conversely, disassembly is possible. This allows the PDC drill bit to quickly install and remove the connector body 1 and the drill bit body 2, facilitating the maintenance and replacement of the drill bit body 2.

[0031] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A PDC drill bit with shock absorption function, comprising a connector body (1), characterized in that: The drill bit body (2) slides inside the connector body (1). A shock absorber (3) is rotatably installed near the top inside the connector body (1). Multiple sets of sliding blocks (4) are fixed to the side wall of the shock absorber (3). A sliding column (5) is provided through the bottom of each sliding block (4). Multiple sets of shock absorber springs (6) are provided at the upper end of the shock absorber (3). A damper (7) is sleeved inside each shock absorber spring (6). Multiple sets of guide blocks (8) are installed at the bottom inside the connector body (1). Multiple sets of guide grooves (9) are opened on the side wall of the drill bit body (2). Multiple sets of drill bit ends (10) are fixed on the side wall of the drill bit body (2). A flow pipe (11) is provided through the center of the upper end of the connector body (1). A flow channel (12) is installed inside the drill bit body (2). A spray hole (13) is opened at the bottom of the drill bit end (10).

2. The PDC drill bit with shock absorption function according to claim 1, characterized in that: The sliding block (4) is slidably connected to the connector body (1), and the sliding block (4) is slidably connected to the sliding column (5), and both the sliding block (4) and the sliding column (5) are located inside the connector body (1).

3. A PDC drill bit with shock absorption function according to claim 1, characterized in that: The number of shock-absorbing springs (6) is eight, the number of dampers (7) is eight, and both the shock-absorbing springs (6) and the dampers (7) are located inside the joint body (1).

4. A PDC drill bit with shock absorption function according to claim 1, characterized in that: The drill bit body (2) is slidably connected to the guide block (8) through the guide groove (9), and there are four guide blocks (8) and five drill bit ends (10).

5. A PDC drill bit with shock absorption function according to claim 3, characterized in that: The side wall of the connector body (1) is rotatably provided with multiple sets of gear columns (14), and a limit ring (15) is rotatably provided inside the connector body (1) near the center. A gear disk (16) is fixed inside the limit ring (15), and multiple sets of insert plates (17) are fixed at the lower end of the gear disk (16). Multiple sets of fixing plates (18) are fixed at the upper end of the drill bit body (2).

6. A PDC drill bit with shock absorption function according to claim 5, characterized in that: The gear column (14) is meshed with the gear disk (16), the gear disk (16) is located inside the connector body (1), and the gear disk (16) is rotatably connected to the connector body (1) through the limiting ring (15).

7. A PDC drill bit with shock absorption function according to claim 5, characterized in that: One end of the drill bit body (2) passes through the gear disk (16), and the drill bit body (2) is rotatably connected to the gear disk (16).

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