Combined geological prospecting drill bit

Abstract

The utility model discloses a combined geological prospecting drilling drill bit belongs to prospecting drill bit technical field. Including drill bit, drill rod, connecting rod, the lower fixedly connected with the connecting cylinder of drill rod, and the fixedly connected with the installation block of inserting connecting cylinder on drill bit, the limit slot is seted up to the inner wall of connecting cylinder, and the limit link that can rotate set up in limit slot is fixedly connected on installation block, the insertion hole is seted up on installation block, and the rotary mechanism is rotatably arranged in the drill rod, and the rotary mechanism lower end fixedly connected with the plug -in plug -in insertion hole, the operating block of drill rod upper end is fixedly connected with rotary mechanism, and operating block is fixedly connected with connecting rod through screw. The application guarantees the stable connection of drill bit and drill rod, and also effectively avoids the direct contact of threaded pair and underground damp, corrosive medium and viscous contaminant, to fundamentally solve the fundamental problem of traditional exposed thread easy to corrode, easy to pollute, greatly prolong the service life of drilling component.

Description

Technical Field

[0001] This utility model provides a combined geological exploration drill bit, belonging to the field of exploration drill bit technology. Background Technology

[0002] In geological exploration drilling operations, a threaded connection is commonly used between the drill bit and the drill string to form a power transmission chain. This connection relies on the tight meshing of precision-machined male and female threads to efficiently transmit the torque and axial pressure provided by the drilling rig to the drill bit, thereby breaking underground rock formations. The reliability of the threaded connection directly affects the efficiency and safety of the entire drilling process. Its advantages lie in its simple structure, high load-bearing capacity, and large torque transmission. However, this connection is located at the very front of the entire drill string, serving as the first line of defense against the complex underground environment, which presents significant challenges to its long-term stability and ease of maintenance.

[0003] In actual operations, drill bits need to work underground for extended periods, inevitably coming into contact with damp soil, groundwater, various mineral salts, and chemically corrosive media. These factors continuously corrode the drill bit body and connecting threads, causing rust on the threaded meshing surfaces, significantly increasing the difficulty of subsequent disassembly. Secondly, when the drill bit needs to be removed for replacement, the exterior and threaded areas are often covered with sticky mud, sand, rock cuttings, and other contaminants. During disassembly, these contaminants easily enter the thread meshing gaps, not only accelerating thread wear but also potentially causing "sticking" or thread seizing, making disassembly extremely difficult and increasing drill bit maintenance costs. Therefore, there is an urgent need for an innovative modular drill bit design that optimizes the structure to prevent corrosion and contamination at the threaded connection points, enabling quick and convenient assembly and disassembly, and extending drill bit life. Utility Model Content

[0004] The technical problem this invention aims to solve is that the threaded connection between the drill bit and the drill rod is more susceptible to corrosion, and that mud, sand, rock chips, and other debris from the lower end of the drill bit and drill rod can easily enter the thread gap during drill bit disassembly, thus exacerbating thread wear.

[0005] To solve the above problems, the proposed technical solution is as follows: a combined geological exploration drilling bit, comprising a drill bit, a drill rod, and a connecting rod; the drill rod is fixedly connected to the drill bit, and the connecting rod is fixedly connected to the drill rod;

[0006] A connecting cylinder is fixedly connected to the lower part of the drill rod, and an installation block for inserting into the connecting cylinder is fixedly connected to the drill bit. A cylindrical limiting groove is formed on the inner wall of the connecting cylinder, and a limiting rod that can be rotatably set in the limiting groove is fixedly connected to the installation block. A pick-and-place groove is formed at the bottom of the connecting cylinder to facilitate the passage of the limiting rod. The pick-and-place groove communicates upward with the limiting groove, and the pick-and-place groove and the limiting rod are offset. An insertion hole is formed on the installation block. A rotating mechanism is rotatably set inside the drill rod, and an insertion block for inserting into the insertion hole is fixedly connected to the lower end of the rotating mechanism. An operating block is rotatably set on the upper end of the drill rod and sleeved on the connecting rod. The operating block is fixedly connected to the rotating mechanism and fixedly connected to the connecting rod by screws.

[0007] Preferably, two symmetrical limiting rods are provided on the mounting block, and two symmetrical pick-and-place slots are provided inside the connecting cylinder.

[0008] Preferably, the socket is a cuboid structure, the plug is located inside the connecting cylinder, and the plug is a cuboid structure corresponding to the socket.

[0009] Preferably, the rotating mechanism includes a rotating block and a rotating rod; a groove is provided inside the drill rod, and the rotating block is rotatably disposed in the groove; the rotating rod is fixedly connected to the bottom of the rotating block, and the lower end of the rotating rod passes through the connecting cylinder and is fixedly connected to the insert block.

[0010] Preferably, the upper end of the drill rod has two arc-shaped guide grooves communicating with the groove, and a connecting column fixedly connected to the lower end of the operating block is provided in the guide groove, and the connecting column is fixedly connected to the rotating block.

[0011] Preferably, the outer wall of the operating block is provided with a countersunk hole, and the screw that fixes the operating block to the connecting rod is located in the countersunk hole.

[0012] The beneficial effects of this utility model are:

[0013] This application separates the rigid connection necessary for power transmission from the threaded pair that is susceptible to corrosion and contamination. The torque and axial force between the drill bit and drill pipe are primarily transmitted through the socket fit between the mounting block and the connecting sleeve, and the engagement of the limiting rod and the cylindrical limiting groove. The threaded pair used for locking is located at the upper end of the drill pipe, away from the drill bit. This innovative design ensures a stable connection between the drill bit and drill pipe while effectively preventing direct contact between the threaded pair and downhole moist, corrosive media and viscous contaminants. This fundamentally solves the problem of traditional exposed threads being prone to corrosion and contamination, significantly extending the service life of drilling components. Attached Figure Description

[0014] Figure 1 This is a front view of the present invention.

[0015] Figure 2This is a bottom view of the present invention.

[0016] Figure 3 This is a cross-sectional view of the connecting cylinder of this utility model.

[0017] Figure 4 This is an exploded view of the connection between the connecting cylinder and the drill bit of this utility model.

[0018] Figure 5 This is a cross-sectional view of the drill pipe of this utility model.

[0019] Figure 6 This is an exploded view showing the connection between the operating block and the drill rod of this utility model.

[0020] 1. Drill bit; 2. Connecting sleeve; 3. Drill rod; 4. Connecting rod; 5. Limiting groove; 6. Rotating rod; 7. Mounting block; 8. Pick-up and drop-off groove; 9. Limiting rod; 10. Insertion hole; 11. Insertion block; 12. Groove; 13. Rotating block; 14. Operating block; 15. Guide groove; 16. Connecting column; 17. Countersunk hole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] This utility model provides a combined geological exploration drilling bit: including a drill bit 1, a drill rod 3, and a connecting rod 4; the drill rod 3 is fixedly connected to the drill bit 1, and the connecting rod 4 is fixedly connected to the drill rod 3; the connecting rod 4 is connected to an external power device, and through the connecting rod 4 and the drill rod 3, the power provided by the external power device can be transmitted to the drill bit 1, thereby realizing drilling work, and the upper end of the drill rod 3 does not enter the ground.

[0023] Reference Appendix Figure 3 , 4 A connecting cylinder 2 is fixedly connected to the lower part of the drill rod 3, and an installation block 7, which is inserted into the connecting cylinder 2, is fixedly connected to the drill bit 1. A cylindrical limiting groove 5 is formed on the inner wall of the connecting cylinder 2, and a limiting rod 9, which can rotatably reside within the limiting groove 5, is fixedly connected to the installation block 7. A pick-and-place groove 8 is formed at the bottom of the connecting cylinder 2 to facilitate the passage of the limiting rod 9. The pick-and-place groove 8 communicates upwards with the limiting groove 5, and is offset from the limiting rod 9. Using the installation block 7 and the connecting cylinder 2, the drill bit 1 and the drill rod 3 can be quickly assembled. Simultaneously, the limiting rod 9 and the limiting groove 5 restrict the vertical displacement of the drill bit 1 and drill rod 3 after they are connected, while the pick-and-place groove 8 does not affect the installation and removal of the installation block 7. Two symmetrical limiting rods 9 are provided on the installation block 7, and two symmetrical pick-and-place grooves 8 are provided inside the connecting cylinder 2.

[0024] Reference Appendix Figure 4 , 5The mounting block 7 has an insertion hole 10, and a rotating mechanism is rotatably installed inside the drill rod 3. The lower end of the rotating mechanism is fixedly connected to the insertion block 11 that is inserted into the insertion hole 10.

[0025] The rotating mechanism includes a rotating block 13 and a rotating rod 6. A groove 12 is formed inside the drill rod 3, and the rotating block 13 is rotatably positioned within the groove 12. The rotating rod 6 is fixedly connected below the rotating block 13, and its lower end passes through the connecting cylinder 2 and is fixedly connected to the insertion block 11. The insertion hole 10 is a cuboid structure, and the insertion block 11 is located inside the connecting cylinder 2, with the insertion block 11 also being a cuboid structure corresponding to the insertion hole 10. The cooperation between the cuboid insertion hole 10 and the insertion block 11 enables power transmission. When the rotating block 13 and the rotating rod 6 are rotated, the cooperation between the insertion hole 10 and the insertion block 11 drives the mounting block 7 to rotate synchronously, thereby aligning the limit rod 9 with the slot 8 for separation of the drill bit 1.

[0026] Reference Appendix Figure 5 , 6 An operating block 14 is rotatably mounted on the upper end of the drill rod 3 and is sleeved on the connecting rod 4. The operating block 14 is fixedly connected to the rotating mechanism and is also fixedly connected to the connecting rod 4 by screws. Two arc-shaped guide grooves 15 communicating with the groove 12 are provided on the upper end of the drill rod 3. A connecting post 16 is fixedly connected to the lower end of the operating block 14 in the guide groove 15 and is fixedly connected to the rotating block 13.

[0027] The outer wall of the operating block 14 has a countersunk hole 17, and the screw that fixes the operating block 14 to the connecting rod 4 is located in the countersunk hole 17. The screw serves to fasten the operating block 14, thereby ensuring the stability of the connection between the drill bit 1 and the drill rod 3. Since the operating block 14 and the screw are located at the upper end of the drill rod 3, they do not enter the ground, greatly reducing the impact of underground moisture, corrosion and impurities on the threaded connection.

[0028] The principle of this utility model

[0029] During installation, the operator first lifts the drill bit 1, aligning the insertion hole 10 with the insertion block 11. Then, the mounting block 7 on the top of the drill bit 1 is aligned and inserted into the connecting cylinder 2 below the drill rod 3. At this point, it is crucial to ensure that the two limiting rods 9 on the mounting block 7 are precisely aligned with the two pick-and-place slots 8 at the bottom of the connecting cylinder 2. Once the limiting rods 9 are fully inserted into the connecting cylinder 2 through the pick-and-place slots 8, the insertion block 11 is simultaneously inserted into the insertion hole 10. Then, the drill bit is rotated 90°, causing the limiting rods 9 to rotate from the pick-and-place slots 8 to the upper cylindrical limiting slot 5 (under the mechanical linkage of the insertion block 11 and the insertion hole 10, the rotating mechanism and the operating block 14 rotate synchronously). This step completes the initial connection and positioning between the drill bit 1 and the drill rod 3. Subsequently, screws are passed through the countersunk holes 17 on the outer wall of the operating block 14 and fastened to the connecting rod 4 to complete the entire installation process. (Refer to the attached diagram.) Figure 1-3The connecting rod 4 is fixedly connected to an external power device, enabling power to be transmitted to the drill bit 1 via the connecting rod 4, drill rod 3, and connecting sleeve 2, thereby facilitating drilling operations. At this time, the drill bit 1 and drill rod 3 can maintain a stable connection. Furthermore, because the screw is located at the uppermost end of the drill rod 3, the impact of underground moisture and corrosive media on the threaded pair during drilling operations is greatly reduced. Additionally, contaminants at the lower ends of the drill bit 1 and drill rod 3 cannot affect the threaded pair located at the upper end of the drill rod 3 during disassembly.

[0030] When it is necessary to disassemble and replace drill bit 1, the procedure is the reverse. (See attached...) Figure 3 In this state, first loosen the screw in the countersunk hole 17 to release the fixing of the operating block 14 and the connecting rod 4. Then rotate the operating block 90°. Under the power transmission of the connecting column 16, the rotating block 13, and the rotating rod 6, the insert block 11 located in the insertion hole 10 drives the mounting block 7 and the drill bit 1 to rotate 90°, so that the limiting rod 9 rotates from the cylindrical limiting groove 5 to the position corresponding to the pick-and-place groove 8. Finally, move the drill bit 1 downward directly, and the limiting rod 9 can smoothly disengage from the connecting cylinder 2 through the pick-and-place groove 8, thereby realizing the rapid separation of the drill bit 1 and the drill rod 3; and since the screw is located at the upper end of the drill rod 3, when separating the drill bit 1 and the drill rod 3, the contaminants at the lower end of the drill bit 1 and the drill rod 3 cannot contaminate the threaded pair.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A combined geological exploration drilling bit, comprising a drill bit (1), a drill rod (3), and a connecting rod (4); wherein the drill rod (3) is fixedly connected to the drill bit (1), and the connecting rod (4) is fixedly connected to the drill rod (3); characterized in that: A connecting cylinder (2) is fixedly connected to the lower part of the drill rod (3), and an installation block (7) for inserting into the connecting cylinder (2) is fixedly connected to the drill bit (1); a cylindrical limiting groove (5) is provided on the inner wall of the connecting cylinder (2), and a limiting rod (9) that can be rotatably set in the limiting groove (5) is fixedly connected to the installation block (7); a pick-and-place groove (8) is provided at the bottom of the connecting cylinder (2) to facilitate the passage of the limiting rod (9), and the pick-and-place groove (8) communicates upward with the limiting groove (5), and The take-up slot (8) and the limiting rod (9) are offset; the mounting block (7) is provided with an insertion hole (10); the drill rod (3) is rotatably provided with a rotating mechanism, and the lower end of the rotating mechanism is fixedly connected with an insertion block (11) for inserting into the insertion hole (10); the upper end of the drill rod (3) is rotatably provided with an operating block (14) sleeved on the connecting rod (4), the operating block (14) is fixedly connected to the rotating mechanism, and the operating block (14) is fixedly connected to the connecting rod (4) by screws.

2. The combined geological exploration drill bit according to claim 1, characterized in that: The limiting rod (9) is provided with two symmetrical ones on the mounting block (7), and the pick-and-place slot (8) is provided with two symmetrical ones inside the connecting cylinder (2).

3. The combined geological exploration drill bit according to claim 1, characterized in that: The socket (10) is a cuboid structure, and the plug (11) is located inside the connecting cylinder (2), and the plug (11) is a cuboid structure corresponding to the socket (10).

4. The combined geological exploration drill bit according to claim 1, characterized in that: The rotating mechanism includes a rotating block (13) and a rotating rod (6); a groove (12) is provided in the drill rod (3), and the rotating block (13) is rotatably disposed in the groove (12); the rotating rod (6) is fixedly connected to the bottom of the rotating block (13), and the lower end of the rotating rod (6) passes through the connecting cylinder (2) and is fixedly connected to the insert block (11).

5. A combined geological exploration drilling bit according to claim 1, characterized in that: The upper end of the drill rod (3) has two arc-shaped guide grooves (15) that communicate with the groove (12). A connecting column (16) is fixedly connected to the lower end of the operating block (14) in the guide groove (15), and the connecting column (16) is fixedly connected to the rotating block (13).

6. A combined geological exploration drilling bit according to claim 1, characterized in that: The outer wall of the operating block (14) is provided with a countersunk hole (17), and the screw that fixes the operating block (14) and the connecting rod (4) is located in the countersunk hole (17).

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