Impact crushing type PDC drill bit assembly

Abstract

According to the technical scheme, the impact crushing type PDC drill bit assembly comprises a main body and an impact head, the impact head is installed in the middle of the top of the main body, a square connecting column is installed at the bottom of the impact head, an inner groove is formed in the middle of the interior of the main body, and an inner hole is formed in the bottom of the interior of the main body; and a movable column is installed in the inner hole, reverse rings are installed on the two sides, close to the top, of the outer surface of the movable column, a cutter wing is installed on the outer surface of the main body, a conical tooth A is installed on one side of the cutter wing, and a conical tooth B is installed on the portion, located in the gap of the conical tooth A, of the outer surface of the cutter wing. According to the impact crushing type PDC drill bit assembly, the problems that when an existing PDC drill bit drills holes, rock is mainly crushed and drilled through rotating conical teeth, the drilling pressure is relatively fixed, and the rock crushing efficiency is relatively poor are solved, the time needed for rock crushing is shortened, and therefore the drilling efficiency of the drill bit is improved.

Description

An impact-breaking PDC drill bit assembly Technical Field

[0001] This utility model relates to the field of PDC drill bit technology, specifically to an impact-breaking PDC drill bit assembly. Background Technology

[0002] PDC drill bits are a commonly used drilling tool. The main part of a PDC drill bit consists of a cutting tool covered with one or more layers of PDC cutting teeth. These PDC cutting teeth are made of diamond particles and a metal bond, possessing high hardness and wear resistance, enabling efficient cutting and drilling in underground rock. PDC drill bits are widely used in oil and gas exploration and extraction. They allow for rapid and efficient drilling in underground rock, improving exploration and production efficiency. Furthermore, PDC drill bits are also used in water well drilling, geological exploration, and engineering construction.

[0003] Existing PDC drill bits mainly rely on rotating conical teeth to break rocks during drilling. The drilling pressure is relatively fixed, and the rock breaking efficiency is relatively poor. To address this, we propose an impact-breaking PDC drill bit assembly. Summary of the Invention

[0004] The purpose of this invention is to provide an impact crushing PDC drill bit assembly that achieves the effect of impact crushing rock surfaces, thereby solving the problem that existing PDC drill bits mainly rely on rotating conical teeth to crush rocks during drilling, resulting in relatively fixed drilling pressure and relatively poor rock crushing efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an impact-breaking PDC drill bit assembly, comprising a main body and an impact head, wherein the impact head is installed in the middle of the top of the main body, and a square connecting column is installed at the bottom of the impact head. An inner groove is provided in the middle of the interior of the main body, and an inner hole is provided at the bottom of the main body. A compression seat is installed at one end of the square connecting column in the inner groove, and a movable column is installed inside the inner hole. Reverse rings are installed on both sides of the outer surface of the movable column near the top.

[0006] Preferably, the movable column has a water guide hole in the middle of its bottom and water outlet holes on both sides, and the water guide hole and the water outlet holes are connected.

[0007] Preferably, a spring groove is provided in the middle of the inner surface of the inner hole, and a spring A is installed on the outer surface of the movable column inside the spring groove via a spring seat.

[0008] Preferably, a central tooth is installed at the top center of the impact head, and a conical tooth C is installed on the outer surface of the impact head. There are a total of twelve conical teeth C, and the twelve conical teeth C are evenly distributed on the outer surface of the impact head.

[0009] Preferably, a blade is mounted on the outer surface of the main body, a conical tooth A is mounted on one side of the blade, and a conical tooth B is mounted on the outer surface of the blade in the gap of the conical tooth A, wherein the diameter of the conical tooth B is smaller than the diameter of the conical tooth A.

[0010] Preferably, a spring B is installed on the outer surface of the square connecting column at the gap between the inner groove and the extrusion seat.

[0011] Preferably, a support frame is installed at each of the four corners of the outer surface of the extrusion seat, and a rubber blocking ball is installed on the top of each support frame via a connecting frame.

[0012] Preferably, water spray holes are provided at the four corners of the outer surface of the main body, and the rubber plug ball is inserted into the water spray holes.

[0013] Preferably, a connecting seat is installed at the bottom of the main body, and slots are provided on both sides of the outer surface of the main body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model achieves the effect of impact crushing of rock surfaces by setting a movable column, an impact head, a square connecting column, and an extrusion seat. This solves the problem that existing PDC drill bits mainly rely on rotating conical teeth to crush rocks during drilling, resulting in relatively fixed drilling pressure and relatively poor rock crushing efficiency. This reduces the time required for rock crushing and thus improves the drilling efficiency of the drill bit.

[0016] 2. This utility model achieves the effect of dispersing drilling pressure by setting up a blade, conical teeth A and conical teeth B, thereby solving the problem that the existing drill bit has poor rock breaking effect when the height of the conical teeth is on the same plane during drilling, reducing the drilling time required and thus improving the drilling efficiency of the drill bit. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 is an enlarged structural diagram of A in Figure 1;

[0019] Figure 3 is a top view of the structure of this utility model;

[0020] Figure 4 is a cross-sectional structural diagram of this utility model;

[0021] Figure 5 is an enlarged structural diagram of B in Figure 4;

[0022] Figure 6 is a magnified schematic diagram of the structure of C in Figure 4.

[0023] Reference numerals: 1. Connecting seat; 2. Main body; 3. Conical tooth A; 4. Conical tooth B; 5. Blade wing; 6. Slot; 7. Water spray hole; 8. Impact head; 9. Center tooth; 10. Conical tooth C; 11. Extrusion seat; 12. Inner groove; 13. Reverse ring; 14. Inner hole; 15. Water guide hole; 16. Moving column; 17. Water outlet hole; 18. Spring A; 19. Spring groove; 20. Spring seat; 21. Square connecting column; 22. Spring B; 23. Rubber blocking ball; 24. Connecting frame; 25. Support frame. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] As shown in Figures 1, 2, 4, and 5, to achieve the above objectives, this utility model provides the following technical solution: an impact-crushing PDC drill bit assembly, comprising a main body 2 and an impact head 8. The impact head 8 is installed at the top center of the main body 2, and a center tooth 9 is installed at the top center of the impact head 8. Twelve conical teeth C10 are installed on the outer surface of the impact head 8, evenly distributed on its outer surface. A square connecting post 21 is installed at the bottom of the impact head 8. The main body 2 drives the impact head 8 to rotate, thereby rotating and crushing the rock. An inner groove 12 is provided in the middle of the interior of the main body 2. The inner bottom is provided with an inner hole 14. One end of the square connecting column 21 is located in the inner groove 12 and is equipped with an extrusion seat 11. The inner hole 14 is equipped with a moving column 16. The outer surface of the moving column 16 is equipped with reverse rings 13 on both sides near the top. The bottom center of the moving column 16 is provided with a water guide hole 15. The two sides of the moving column 16 are provided with water outlet holes 17. The water guide hole 15 and the water outlet hole 17 are connected. The inner surface of the inner hole 14 is provided with a spring groove 19. The outer surface of the moving column 16 is located inside the spring groove 19 and is equipped with a spring A18 through a spring seat 20. The outer surface of the square connecting column 21 is equipped with a spring B22 at the gap between the inner groove 12 and the extrusion seat 11.

[0027] As shown in Figures 4 and 6, support frames 25 are installed at the four corners of the outer surface of the extrusion seat 11. Rubber blocking balls 23 are installed on the top of each support frame 25 through a connecting frame 24. Water spray holes 7 are provided at the four corners of the outer surface of the main body 2. The rubber blocking balls 23 are inserted into the water spray holes 7 to block the water spray holes 7.

[0028] The working principle of the impact crushing PDC drill bit assembly based on Embodiment 1 is as follows: After the present invention is installed, during use, the present invention is connected to the drill rod through the connecting seat 1. Water is transported to the inner hole 14 through the drill rod. The water pressure squeezes the moving column 16, thereby driving the moving column 16 to move and connect the water outlet 17 with the inner groove 12. At this time, the water is guided to the inner groove 12 through the water guide hole 15 and the water outlet 17, and guided to one side of the squeezing seat 11 through the reverse ring 13. At the same time, the moving moving column 16 squeezes the squeezing seat 11, thereby causing the rubber blocking ball 23 to be inserted. The water spray hole 7 is sealed inside the water spray hole 7, and the impact head 8 is moved by the squeezing seat 11 to impact the rock. When the water pressure inside the inner tank 12 increases, the moving column 16 is reset by the elastic force of spring A18, the spring of spring B22 and the reaction force of the reverse ring 13, and the impact head 8 is reset by the elastic force of spring B22. At the same time, the water spray hole 7 is opened to discharge the water inside the inner tank 12. During continuous use, the impact head 8 moves back and forth and is rotated by the main body 2 to break and drill holes in the rock surface. At this point, the working process of this equipment is completed.

[0029] Example 2

[0030] As shown in Figures 1 and 3, the impact crushing PDC drill bit assembly proposed in this utility model, compared with Embodiment 1, further includes: a blade 5 installed on the outer surface of the main body 2, a conical tooth A3 installed on one side of the blade 5, and a conical tooth B4 installed on the outer surface of the blade 5 in the gap of the conical tooth A3. The diameter of the conical tooth B4 is smaller than the diameter of the conical tooth A3. The rock is continuously crushed by the staggered conical teeth A3 and B4. A connecting seat 1 is installed at the bottom of the main body 2, and slots 6 are provided on both sides of the outer surface of the main body 2 to facilitate the disassembly and assembly of this utility model.

[0031] In this embodiment, when the main body 2 rotates, the main body 2 drives the blade 5 to rotate, and the blade 5 drives the conical tooth A3 to rotate, thereby breaking and drilling the rock. The blade 5 also drives the conical tooth B4 to rotate, thereby continuously breaking and drilling the rock.

[0032] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An impact-breaking PDC drill bit assembly, comprising a body (2) and an impact head (8), characterized in that: An impact head (8) is installed at the top center of the main body (2), and a square connecting column (21) is installed at the bottom of the impact head (8). An inner groove (12) is provided in the middle of the main body (2), and an inner hole (14) is provided at the bottom of the main body (2). One end of the square connecting column (21) is located in the inner groove (12) and an extrusion seat (11) is installed therein. A moving column (16) is installed inside the inner hole (14), and a reverse ring (13) is installed on both sides of the outer surface of the moving column (16) near the top.

2. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: The movable column (16) has a water guide hole (15) in the middle of its bottom, and water outlet holes (17) are provided on both sides of the movable column (16). The water guide hole (15) and the water outlet hole (17) are connected.

3. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: A spring groove (19) is provided in the middle of the inner surface of the inner hole (14), and a spring A (18) is installed on the outer surface of the movable column (16) inside the spring groove (19) through the spring seat (20).

4. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: The impact head (8) has a central tooth (9) installed in the middle of its top, and a conical tooth C (10) is installed on the outer surface of the impact head (8). There are twelve conical teeth C (10) in total, and the twelve conical teeth C (10) are evenly distributed on the outer surface of the impact head (8).

5. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: The outer surface of the main body (2) is equipped with a blade (5), and a conical tooth A (3) is installed on one side of the blade (5). A conical tooth B (4) is installed on the outer surface of the blade (5) in the gap between the conical tooth A (3). The diameter of the conical tooth B (4) is smaller than the diameter of the conical tooth A (3).

6. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: A spring B (22) is installed on the outer surface of the square connecting column (21) at the gap between the inner groove (12) and the extrusion seat (11).

7. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: Support frames (25) are installed at the four corners of the outer surface of the extrusion seat (11), and rubber blocking balls (23) are installed on the top of each support frame (25) through a connecting frame (24).

8. The impact-breaking PDC drill bit assembly according to claim 7, characterized in that: Water spray holes (7) are provided at the four corners of the outer surface of the main body (2), and the rubber blocking ball (23) is fitted inside the water spray hole (7).

9. The impact-breaking PDC drill bit assembly according to claim 1, characterized in that: The main body (2) is equipped with a connecting seat (1) at the bottom, and the main body (2) has slots (6) on both sides of its outer surface.

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