PDC (Polycrystalline Diamond Compact) drill bit for efficiently cutting hard formation

Abstract

The utility model relates to the technical field of drill bits, in particular to a PDC (Polycrystalline Diamond Compact) drill bit for efficiently cutting hard formations, which is very convenient to disassemble, can avoid misoperation in a drilling process, does not need professional tools, and saves time and labor. Comprising a mounting rod seat, a PDC drill bit body, an inserting-connecting assembly, a dismounting assembly and a protection assembly, an inserting-connecting groove is formed in the bottom of the mounting rod seat, the top of the PDC drill bit body is connected with the bottom of the mounting rod seat through the inserting-connecting assembly, a cutter assembly is arranged on the lower portion of the PDC drill bit body, the dismounting assembly is mounted on the lower portion of the mounting rod seat, and the protection assembly is mounted outside the dismounting assembly. The protection assembly is installed on the outer wall of the installation rod base.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a PDC drill bit for efficiently cutting hard formations. Background Art

[0002] A PDC drill bit is also known as a diamond drill bit. This one-piece drill bit has no moving parts, a relatively simple structure, and is impact-resistant. It was one of the three major drilling technologies introduced worldwide in the 1980s. Some current PDC drill bits have several drawbacks. When drilling in deep, difficult-to-drill formations, some current PDC drill bits often fail to achieve a high rate of penetration (ROP). A key reason for this is the limited penetration capability of the PDC cutters. In particular, as the drill bit wears, the contact pressure between the PDC cutters and the rock drops sharply, resulting in very low drilling efficiency and even causing the drill to trip. Severe wear of the PDC drill bit requires replacement. Prior Art Publication No. CN212508092U proposes a PDC drill bit for drilling in hard formations, comprising a PDC drill bit body and a connecting plate. Blades are fixedly connected to the right end face of the PDC drill bit body, and PDC cutters are fixedly connected to the outer sides of the blades. However, the pressure plate is located outside the fixed plate, which may cause accidental collision with the pressure plate during rotation, causing the drill bit to fall off and affecting processing. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a PDC drill bit that is very convenient to disassemble, can avoid misoperation during the drilling process, does not require the use of professional tools, saves time and effort, and can efficiently cut hard formations.

[0004] The frequency control of PDC drill bit is very large, just need to be kept regular maintenance, the longer the life of the PDC drill bit is, the bigger the impact failure of PDC drill bit, and the longer the life of PDC drill bit is, the bigger the impact of PDC drill bit is.

[0005] The PDC drill bit body is convenient to install and has high drilling speed, and its operation is very convenient to operate.

[0006] When the push block moves, it drives the slide plate to slide on the positioning slide bar to ensure stability, and the return spring can push the slide plate to drive the push block to return to its original position, which is convenient for use.

[0007] The PDC drill bit is a very powerful drill that can drill holes in a very small area and can be used to drill holes in a very small area, so it is very useful for drillers to drill holes in very small areas.

[0008] Preferably, the cutter assembly includes multiple cutting teeth, multiple groups of wear-resistant teeth and multiple groups of side gauge teeth. The multiple cutting teeth are axially installed at the bottom of the PDC drill bit body, multiple wear-resistant teeth are installed at the bottom of the cutting teeth, and multiple side gauge teeth are installed on the outer wall of the cutting teeth. When the PDC drill bit body drills in hard formations, rock ridges will be formed at the bottom of the well after the wear-resistant teeth are worn, which increases the lateral contact area between the cutting teeth and the bottom rock of the well, reduces lateral vibration, and at the same time the side gauge teeth can trim the well wall, thereby improving the working efficiency of the drill bit.

[0009] Preferably, vertical protrusions are evenly arranged axially on the outer wall of the protective sleeve; the vertical protrusions can increase the friction between the screwing tool and the protective sleeve to avoid sliding.

[0010] The frequency|accuracy of this invention is very big, just can not be ignored, just can not give the actual number of times that the PDC drill bit is used for grinding holes, and the impact failure of the PDC drill bit is not serious, so it is a good idea to use a lot of methods to drill holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a front cross-sectional structural schematic diagram of the utility model;

[0013] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;

[0014] Figure 4 It is a schematic diagram of the upper cross-sectional structure of the utility model;

[0015] Figure 5 It is a structural diagram of the disassembly assembly of the utility model;

[0016] Markings in the accompanying drawings: 1. Mounting rod seat; 2. PDC drill bit body; 3. Bump; 4. Plug; 5. Push plate; 6. Spring; 7. Limit block; 8. Push block; 9. Positioning slide rod; 10. Slide plate; 11. Return spring; 12. Thread ring; 13. Protective sleeve; 14. Cutting tooth; 15. Wear-resistant tooth; 16. Side gauge tooth. DETAILED DESCRIPTION

[0017] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0018] like Figures 1 to 5 As shown, a plug-in slot is provided at the bottom of the mounting rod seat 1, a plug 4 is installed on the top of the PDC drill bit body 2, a plurality of protrusions 3 are evenly installed axially at the bottom of the mounting rod seat 1 plug-in slot, a positioning slot matching the protrusion 3 is provided on the outer wall of the plug 4, a telescopic cavity is provided at the upper part of the plug 4 corresponding to the protrusion 3, and a plurality of push plates 5 are slidably installed in the telescopic cavity, a plurality of springs 6 are installed at one end of the push plate 5 close to the plug 4, the spring 6 is connected to the telescopic cavity, and a limit block 7 is fixedly installed on the other end of the push plate 5, and the limit block 7 slides through the outer wall of the plug 4, a push groove is provided on the outer wall of the mounting rod seat 1 at a position matching the limit block 7, and the push block 8 is slidably installed in the push groove, and a limit slide groove is provided at the upper and lower ends of the push groove, and a positioning slide rod 9 is installed in the limit slide groove. A slide 10 is fixedly installed at the end, and the slide 10 is slidably installed on the outer wall of the positioning slide rod 9. A return spring 11 is sleeved on the outer wall of the positioning slide rod 9. One end of the return spring 11 is connected to the slide 10, and the other end of the return spring 11 is connected to the end of the push groove close to the limit block 7. A lifting groove is provided at the lower part of the outer wall of the mounting rod seat 1, and a threaded groove is provided on the inner wall of the lifting groove. A threaded ring 12 is screwed in the threaded groove. A protective sleeve 13 is fixedly installed on the outer wall of the threaded ring 12. The protective sleeve 13 is slidably installed on the outer wall of the mounting rod seat 1. Vertical protrusions are evenly arranged axially on the outer wall of the protective sleeve 13. A plurality of cutting teeth 14 are axially installed at the bottom of the PDC drill bit body 2. A plurality of wear-resistant teeth 15 are installed at the bottom of the cutting tooth 14, and a plurality of side gauge teeth 16 are installed on the outer wall of the cutting tooth 14;

[0019] When installing, push the plug 4 into the insertion slot of the PDC drill bit body 2, and ensure power transmission through the cooperation of the protrusion 3 and the positioning slot. After the plug 4 is inserted into the position, the spring 6 pushes the push plate 5 in the telescopic cavity. After the PDC drill bit body 2 is worn, press the push block 8 to push the limit block 7 to retract into the telescopic cavity, releasing the limit with the protrusion 3, and the PDC drill bit body 2 can be removed from the mounting rod seat 1. It is very convenient to disassemble the PDC drill bit, and no professional tools are required, which saves time and effort. When the push block 8 moves, it drives the slide plate 10 to slide on the positioning slide bar 9 to ensure stability. The slide plate 10 can be pushed by the reset spring 11 to drive the push block 8 to return to its original position, which is convenient to use and rotate. The protective sleeve 13 enables the return spring 11 to cooperate with the thread groove to move upward, exposing the push block 8, and disassembling the PDC drill bit body 2. The protective sleeve 13 is rotated to make the return spring 11 drive it to move downward, which can protect the push block 8 and avoid misoperation during drilling, which may cause the PDC drill bit body 2 to fall, thereby improving stability. The vertical protrusion can increase the friction between the screwing tool and the screwing tool to avoid sliding. When the PDC drill bit body 2 drills in hard formations, the wear-resistant teeth 15 will form a rock ridge at the bottom of the well after wear, increasing the lateral contact surface between the cutting teeth 14 and the bottom rock of the well, reducing lateral vibration. At the same time, the side gauge teeth 16 can trim the well wall and improve the working efficiency of the drill bit.

[0020] like Figures 1 to 5 The more frequent occurrences of PDC drill bits, the more frequent the occurrence of accidents and the more frequent the occurrence of accidents. The C drill bit body 2 falls. When the PDC drill bit body 2 drills in hard formations, the wear-resistant teeth 15 will form a rock ridge at the bottom of the well after being worn, increasing the lateral contact surface between the cutting teeth 14 and the bottom rock, reducing lateral vibration. At the same time, the side gauge teeth 16 can trim the well wall. After the PDC drill bit body 2 is worn, the protective sleeve 13 is rotated to make the reset spring 11 cooperate with the thread groove to move upward, exposing the push block 8, pressing the push block 8 to push the limit block 7 back into the telescopic cavity, releasing the limit with the protrusion 3, and the PDC drill bit body 2 can be removed from the mounting rod seat 1.

[0021] The cutting teeth 14 and wear-resistant teeth 15 of the PDC drill bit for efficiently cutting hard formations of the utility model are purchased on the market. Technicians in this industry only need to install and operate them according to the accompanying instruction manual without the need for creative work by technicians in this field.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A PDC drill bit for efficiently cutting hard formations, characterized in that: The invention comprises a mounting rod seat (1), a PDC drill bit body (2), a plug-in assembly, a disassembly assembly and a protective assembly. The bottom of the mounting rod seat (1) is provided with a plug-in slot. The top of the PDC drill bit body (2) is connected to the bottom of the mounting rod seat (1) via the plug-in assembly. A cutter assembly is provided at the bottom of the PDC drill bit body (2). A disassembly assembly is installed at the bottom of the mounting rod seat (1). A protective assembly is installed outside the disassembly assembly. The protective assembly is installed on the outer wall of the mounting rod seat (1).

2. A PDC drill bit for efficiently cutting hard formations according to claim 1, characterized in that: The plug-in assembly comprises a plurality of protrusions (3), a plug (4), a plurality of push plates (5), a plurality of groups of springs (6) and a plurality of limit blocks (7); a plug (4) is installed on the top of the PDC drill bit body (2); a plurality of protrusions (3) are evenly installed axially at the bottom of the insertion slot of the mounting rod seat (1); a positioning slot matching the protrusions (3) is provided on the outer wall of the plug (4); a telescopic cavity is provided at a position corresponding to the protrusions (3) on the upper part of the plug (4); a plurality of push plates (5) are respectively slidably installed in the telescopic cavity; a plurality of springs (6) are installed on one end of the push plate (5) close to the plug (4); the springs (6) are connected to the telescopic cavity; a limit block (7) is fixedly installed on the other end of the push plate (5); and the limit block (7) slides through the outer wall of the plug (4).

3. A PDC drill bit for efficiently cutting hard formations according to claim 2, characterized in that: The disassembly assembly comprises a plurality of push blocks (8), a plurality of positioning slide bars (9), a plurality of slide plates (10) and a plurality of return springs (11). A push groove is provided on the outer wall of the mounting rod seat (1) at a position matching the limit block (7). The push block (8) is slidably installed in the push groove. The upper and lower ends of the push groove are provided with limit slide grooves. The positioning slide bar (9) is installed in the limit slide groove. Slide plates (10) are fixedly installed on the upper and lower ends of the left side of the push block (8). The slide plate (10) is slidably installed on the outer wall of the positioning slide bar (9). The return spring (11) is sleeved on the outer wall of the positioning slide bar (9). One end of the return spring (11) is connected to the slide plate (10), and the other end of the return spring (11) is connected to one end of the push groove close to the limit block (7).

4. A PDC drill bit for efficiently cutting hard formations according to claim 1, characterized in that: The protective assembly comprises a threaded ring (12) and a protective sliding sleeve (13); a lifting groove is provided on the lower portion of the outer wall of the mounting rod seat (1); a threaded groove is provided on the inner wall of the lifting groove; the threaded ring (12) is screwed into the threaded groove; a protective sliding sleeve (13) is fixedly installed on the outer wall of the threaded ring (12); and the protective sliding sleeve (13) is slidably installed on the outer wall of the mounting rod seat (1).

5. A PDC drill bit for efficiently cutting hard formations according to claim 1, characterized in that: The cutter assembly comprises a plurality of cutting teeth (14), a plurality of groups of wear-resistant teeth (15) and a plurality of groups of side gauge teeth (16); the plurality of cutting teeth (14) are axially mounted on the bottom of a PDC drill bit body (2); the plurality of wear-resistant teeth (15) are mounted on the bottom of the cutting teeth (14); and the plurality of side gauge teeth (16) are mounted on the outer wall of the cutting teeth (14).

6. A PDC drill bit for efficiently cutting hard formations according to claim 4, characterized in that: The outer wall of the protective sliding sleeve (13) is also provided with vertical protrusions evenly arranged in the axial direction.

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