A drill bit with detachable blades
The drill bit design with detachable cutter wings solves the problems of resource waste and lack of flexibility caused by the non-detachable cutter wings of traditional drill bits. It achieves stable connection and convenient replacement, adapts to the drilling needs of different rock formations, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RUIBITUO (DONGGUAN) PETROLEUM TECHNOLOGY CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional drill bits with non-removable cutter blades cannot be maintained after wear, resulting in serious waste of resources. They also lack flexibility and cannot adapt to the drilling needs of different rock formations, leading to high costs.
The cutter blade adopts a detachable structure. The cutter blade and the drill bit body are detachably connected by inserting the second connecting part and the first connecting part and then fixing them with connecting parts. Combined with the design of limiting groove, limiting block and connecting bolt, the assembly stability and convenient replacement are ensured.
It achieves stable connection and convenient replacement of cutter wings, reduces resource waste, adapts to the drilling needs of different rock formations, and reduces replacement costs.
Smart Images
Figure CN224326253U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drill bit technology, and in particular to a drill bit with detachable blades. Background Technology
[0002] Currently, in many fields such as geological exploration and oil and gas drilling, drill bits are key drilling tools, and their performance directly affects the efficiency and cost of operations. Traditional drill bits with non-removable cutter blades typically have their cutter blades integrally formed with the drill bit body or fixedly connected by welding or other methods, such as the common PDC drill bit (polycrystalline diamond composite drill bit).
[0003] Since the cutter blades and the drill bit body are integrally formed or welded together and cannot be disassembled, once the cutter blades are worn, the later maintenance is particularly troublesome and may even be irreparable. Therefore, when the cutter blades are worn, since they cannot be disassembled, the entire drill bit must be replaced. This not only causes a huge waste of resources, but also because the manufacturing cost of the drill bit itself is high.
[0004] Furthermore, when drilling cores from different rock formations, drill bits with non-detachable blades lack flexibility to meet different operational needs, such as drilling wells of different diameters or adapting to the characteristics of different formations. Therefore, it is necessary to prepare multiple drill bits of different specifications for different operational needs, which also leads to higher costs. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a drill bit with detachable blades. The blades and the drill bit body are fitted together by a second connecting part and a first connecting part, and then connected and fixed by a connecting piece. This assembly structure is stable and the blades can be replaced.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A drill bit with detachable blades, comprising,
[0008] The drill bit body has a plurality of first connecting parts, which are spaced apart in the circumferential direction of the drill bit body and extend along the axial direction of the drill bit body.
[0009] Multiple blades, each blade having a mounting surface facing the drill bit body and a cutting surface facing away from the drill bit body; a second connecting portion is provided on the mounting surface; and multiple cutting teeth are provided on the cutting surface.
[0010] Multiple connectors are provided one-to-one on the cutter wing. The connectors pass through the second connecting part and are connected to the first connecting part, so that the cutter wing and the drill bit body can be detachably connected.
[0011] Furthermore, the first connecting portion includes a connecting groove, and the second connecting portion includes a connecting block protruding from the blade wing, the connecting block being inserted into the connecting groove.
[0012] Furthermore, a through-hole is provided at the bottom end of the connecting groove; and limit grooves are provided on both side walls of the connecting groove.
[0013] The connecting block is provided with protruding limiting blocks on both sides; the connecting block passes through the through-hole into the connecting groove, and the limiting blocks are engaged with the limiting groove.
[0014] Furthermore, the bottom end of the connecting groove is also provided with a stop block and an insertion groove. One end of the stop block is provided with an insertion section, and the other end of the stop block is provided with a support section. The insertion section is inserted into the insertion groove so that the support section seals the through-hole and supports the bottom end of the blade.
[0015] Furthermore, an abutment step is provided at the end of the support section near the insertion section, the abutment step being used to abut against the inner wall of the insertion slot after the insertion section is inserted into the insertion slot.
[0016] Furthermore, the connector includes a connecting bolt, the first connecting portion is provided with a threaded hole; the blade is provided with a through hole, the through hole passing through the second connecting portion; the connecting bolt passes through the through hole and is screwed into the threaded hole.
[0017] Furthermore, the drill bit body is provided with a plurality of flushing nozzles; and the flushing nozzles are provided between two adjacent first connecting parts.
[0018] Furthermore, the blade is provided with five blades.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0020] 1. After the cutter wing is fixed to the drill bit body, the connection position between the cutter wing and the drill bit body is limited by the second connecting part and the first connecting part, and the first connecting part extends along the axial direction of the drill bit body. Therefore, the cutter wing has a large connection surface after being assembled to the drill bit body. Then, it is fixed by the connecting parts, making the cutter wing assembly structure more stable.
[0021] 2. When the cutting teeth on a single cutter wing are worn or the cutter wing itself is damaged, the connecting piece can be removed from the cutter wing. The first connection between the connecting piece and the drill bit body can be separated, allowing the cutter wing to be removed. A spare cutter wing can then be installed onto the drill bit body. This allows for the replacement of individual cutter wings without replacing the entire drill bit. Furthermore, the size and type of the cutting teeth on each cutter wing can be different, enabling cutter wing replacement according to different rock formations. Attached Figure Description
[0022] Figure 1 This is an exploded view of the drill bit of this utility model;
[0023] Figure 2 This is a schematic diagram of the overall structure of the drill bit of this utility model;
[0024] Figure 3 This is a schematic diagram of the overall structure of the drill bit of this utility model from another perspective.
[0025] Figure 4 This is a schematic diagram of the blade of this utility model;
[0026] Figure 5 This is a schematic diagram of the structure of the stop block of this utility model.
[0027] In the diagram: 10. Drill bit body; 11. Connecting groove; 111. Limiting groove; 112. Insertion groove; 12. Flushing nozzle; 20. Cutting blade; 21. Connecting block; 211. Limiting block; 221. Through hole; 22. Cutting teeth; 30. Connecting piece; 40. Stop block; 41. Insertion section; 42. Support section; 43. Abutment step. Detailed Implementation
[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:
[0029] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0031] like Figures 1-5 The drill bit shown has detachable blades 20 and includes a drill bit body 10, a plurality of blades 20 and a plurality of connectors 30. A plurality of first connecting parts are provided on the drill bit body 10 and are spaced apart in the circumferential direction of the drill bit body 10. The first connecting parts extend along the axial direction of the drill bit body 10.
[0032] Specifically, the blade 20 has an assembly surface and a cutting surface, which are located on opposite sides of the blade 20. Taking the drill body 10 as a reference, the side of the blade 20 facing the drill body 10 is the assembly surface, while the side of the blade 20 away from the drill body 10 is the cutting surface. A second connecting part is provided on the assembly surface; the cutting surface is provided with multiple cutting teeth 22.
[0033] The aforementioned multiple connectors 30 are respectively disposed on the blade 20, and the connectors 30 pass through the second connecting part and are connected to the first connecting part, so that the blade 20 and the drill body 10 can be detachably connected.
[0034] Based on the above structure, when using the detachable cutter wing 20 drill bit of this utility model, during the assembly of the drill bit, since the cutter wing 20 is provided with a second connecting part and the drill bit body 10 is provided with a first connecting part, the second connecting part of the cutter wing 20 can be inserted and fitted into the first connecting part on the drill bit body 10. The insertion and fitting of the second connecting part and the first connecting part can achieve the initial positioning of the cutter wing 20 and the drill bit body 10. Then, the connector 30 passes through the cutter wing 20 and connects to the drill bit body 10, so that the cutter wing 20 and the drill bit body 10 are fixed. After the cutter wing 20 is fixed to the drill bit body 10, the connection position between the cutter wing 20 and the drill bit body 10 is limited by the second connecting part and the first connecting part, and the first connecting part extends along the axial direction of the drill bit body 10. Therefore, the cutter wing 20 has a large connection surface after being assembled to the drill bit body 10. Then, it is fixed by the connector 30, and the assembly structure of the cutter wing 20 is more stable. Thus, each cutter blade 20 is assembled onto the drill body 10 in sequence using the assembly process described above.
[0035] After the multiple cutter wings 20 are assembled with the drill bit body 10, the multiple cutter wings 20 are distributed at intervals along the circumference of the drill bit body 10. During the drilling process, the multiple cutting teeth 22 on each cutter wing 20 can contact the rock formation to perform rock breaking action. Since the angular distribution difference between two adjacent cutter wings 20 in the circumferential direction is relatively uniform, the load-bearing capacity of each cutter wing 20 is relatively balanced during the drilling process, and the force is uniform when drilling into the formation, thus making it more stable.
[0036] Of course, if the cutting teeth 22 on a single cutter wing 20 are worn or the cutter wing 20 itself is damaged, the connecting piece 30 can be removed from the cutter wing 20. The connecting piece 30 can be separated from the first connection part of the drill bit body 10, thus allowing the cutter wing 20 to be removed. A spare cutter wing 20 can then be installed onto the drill bit body 10. This allows for the replacement of a single cutter wing 20 without replacing the entire drill bit. Furthermore, the size and type of the cutting teeth 22 on each cutter wing 20 can be different, allowing for the replacement of cutter wings 20 according to different rock formations.
[0037] Furthermore, in this embodiment, the first connecting part includes a connecting groove 11, and the second connecting part includes a connecting block 21. The connecting block 21 can protrude from the mounting surface of the blade 20. When assembling the blade 20 and the drill body 10, the connecting block 21 is inserted into the connecting groove 11. After the connecting block 21 and the connecting groove 11 are inserted into place, the two sides of the connecting block 21 can be restricted by the two side walls of the connecting groove 11, reducing the shaking of the blade 20 after it is assembled into the drill body 10. In this way, the blade 20 is structurally stable after it is assembled into the drill body 10. After the connecting block 21 and the connecting groove 11 are inserted into place, the connecting member 30 is inserted into the blade 20 and passes through the connecting block 21 to connect to the connecting groove 11 of the blade 20.
[0038] Furthermore, a through-port can be provided at the bottom of the connecting groove 11, and limit grooves 111 can be provided on both sides of the connecting groove 11; limit blocks 211 are provided on both sides of the connecting block 21; the connecting block 21 passes through the through-port into the connecting groove 11, and the limit blocks 211 are engaged with the limit grooves 111.
[0039] When the connecting block 21 of the blade 20 is assembled with the connecting groove 11 of the drill body 10, the limiting block 211 protrudes from the connecting block 21, and the outer diameter of the connecting block 21 matches the inner diameter of the connecting groove 11. This restricts the insertion of the connecting block 21. Therefore, the blade 20 can be inserted through the bottom through-hole of the connecting groove 11, with the connecting block 21 corresponding to the through-hole. The limiting blocks 211 on both sides of the connecting block 21 can correspond to the limiting grooves 111 on both sides of the connecting groove 11. During the process of sliding the connecting block 21 upward into the connecting groove 11, the limiting blocks 211 can gradually slide towards the limiting grooves 111 until the assembly is in place. Then, the connecting block 21 and the connecting groove 11 can be relatively fixed by the connecting piece 30.
[0040] Based on the above structure, after the connecting block 21 and the connecting groove 11 are inserted into place, the two sides are limited by the limiting block 211 and the limiting groove 111, which can prevent the connecting block 21 from shaking back and forth after being inserted into the connecting groove 11. With the left and right limiting of the connecting block 21 and the connecting groove 11 on both sides, the assembly structure of the blade 20 is more stable.
[0041] Further, see Figure 1 as well as Figure 5Furthermore, a stop block 40 and an insertion groove 112 can be provided at the bottom of the connecting groove 11. An insertion section 41 is provided at one end of the stop block 40, and a support section 42 is provided at the other end of the stop block 40. The insertion section 41 is inserted into the insertion groove 112 so that the support section 42 blocks the through-hole and supports the bottom of the blade wing 20. Based on this structure, after the connecting block 21 is inserted into the connecting groove 11, since the through-hole for the blade wing 20 to pass through is located at the bottom of the connecting groove 11, in order to prevent the blade wing 20 from sliding downwards after being installed, causing the blade wing 20 to loosen up and down, after the connecting block 21 of the blade wing 20 is assembled into the connecting groove 111, the insert section 41 of the stop block 40 is inserted into the insert groove 112 at the bottom of the connecting groove 11. In this way, the support section 42 of the stop block 40 can support the bottom of the blade wing 20, achieving upper and lower limit. This restricts the upper and lower loosening of the blade wing 20, and the structure is more stable after assembly.
[0042] Further, see Figure 5 Furthermore, an abutment step 43 can be provided at the end of the support section 42 near the insertion section 41. The abutment step 43 can abut against the inner wall of the insertion groove 112 after the insertion section 41 is inserted into the insertion groove 112. Since the top of the cutter wing 20 is easily subjected to the impact force of the rock layer during drilling after the cutter wing 20 is assembled into the drill bit body 10, the bottom of the cutter wing 20 is also easily subjected to force during long-term impact. If the stop section extends directly out of the insertion groove 112, the impact of the cutter wing 20 can easily cause the stop block 40 to break at the opening of the connecting groove 11. Therefore, by providing the abutment step 43, the end face of the support section 42 abuts against the cutter wing 20, and the side of the support section 42 abuts against the side of the connecting groove 11 with the abutment step 43, providing support in two directions and reducing the breakage of the stop block 40 after long-term impact.
[0043] Furthermore, in this embodiment, the connector 30 includes a connecting bolt, the first connecting part is provided with a threaded hole, and the cutter wing 20 is provided with a through hole 221, which passes through the second connecting part; the connecting bolt passes through the through hole 221 and is screwed into the threaded hole. After the cutter wing 20 is inserted and engaged with the first connecting part on the drill bit body 10 through the second connecting part, the tail end of the connecting bolt is inserted into the through hole 221 and guided to the threaded hole through the through hole 221. The tail end of the connecting bolt can then be screwed into the threaded hole. At this time, the head of the connecting bolt abuts against the cutter wing 20, reducing the loosening of the cutter wing 20.
[0044] Furthermore, when replacing the blade 20, it can be easily disassembled and installed by simply removing the connecting bolt from the threaded hole and exiting through the through hole 221.
[0045] Furthermore, the drill bit body 10 is provided with a plurality of flushing nozzles 12; a flushing nozzle 12 is provided between two adjacent first connecting parts. When in use, the flushing nozzle 12 can be connected to an external cleaning pipe. During the drilling process, cleaning water can be sprayed through the flushing nozzle 12, which can enhance the cleaning effect of rock cuttings and effectively prevent the phenomenon of drill bit mud buildup.
[0046] Furthermore, five blades 20 are provided. During the drilling process, because five blades 20 are distributed on the drill bit body 10, the drill bit body 10 rotates 360 degrees around its circumference. o The five blades 20 are spaced apart, and the angular distribution difference between two adjacent blades 20 in the circumferential direction is small. During the drilling process, the bearing capacity of each blade 20 is relatively balanced, and the force is uniform when drilling into the formation, thus making it more stable.
[0047] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.
Claims
1. A drill bit with detachable blades, characterized in that, include, The drill bit body has a plurality of first connecting parts, which are spaced apart in the circumferential direction of the drill bit body and extend along the axial direction of the drill bit body. Multiple blades, each blade having a mounting surface facing the drill bit body and a cutting surface facing away from the drill bit body; a second connecting portion is provided on the mounting surface; and multiple cutting teeth are provided on the cutting surface. Multiple connectors are provided one-to-one on the cutter wing. The connectors pass through the second connecting part and are connected to the first connecting part, so that the cutter wing and the drill bit body can be detachably connected.
2. The drill bit with detachable blades according to claim 1, characterized in that, The first connecting part includes a connecting groove, and the second connecting part includes a connecting block protruding from the blade wing, the connecting block being inserted into the connecting groove.
3. The drill bit with detachable blades according to claim 2, characterized in that, The bottom end of the connecting groove is provided with a through-hole; both sides of the connecting groove are provided with limit grooves. The connecting block is provided with protruding limiting blocks on both sides; the connecting block passes through the through-hole into the connecting groove, and the limiting blocks are engaged with the limiting groove.
4. The drill bit with detachable blades according to claim 3, characterized in that, The bottom end of the connecting groove is also provided with a stop block and an insertion groove. One end of the stop block is provided with an insertion section, and the other end of the stop block is provided with a support section. The insertion section is inserted into the insertion groove so that the support section seals the through-hole and supports the bottom end of the blade.
5. The drill bit with detachable blades according to claim 4, characterized in that, An abutment step is provided at the end of the support section near the insertion section. The abutment step is used to abut against the inner wall of the insertion slot after the insertion section is inserted into the insertion slot.
6. The drill bit with detachable cutter wings according to any one of claims 1-5, characterized in that, The connector includes a connecting bolt, and the first connecting part is provided with a threaded hole; the blade is provided with a through hole, and the through hole passes through the second connecting part; the connecting bolt passes through the through hole and is screwed into the threaded hole.
7. The drill bit with detachable cutter wings according to any one of claims 1-5, characterized in that, The drill bit body is provided with a plurality of flushing nozzles; the flushing nozzles are provided between two adjacent first connecting parts.
8. The drill bit with detachable cutter wings according to any one of claims 1-5, characterized in that, The blade has five blades.