A drill bit with rotating blades

Abstract

This utility model discloses a drill bit with rotating blades, including a drill bit body, a cutting blade assembly, and a rotating blade assembly. Both the cutting blade assembly and the rotating blade assembly are mounted on the drill bit body and are spaced apart along the circumference of the drill bit body. The rotating blade assembly includes rotating blades and a rotating shaft. The rotating blades are rotatably mounted on the drill bit body via the rotating shaft, and the rotating blades are provided with multiple fixed cutting teeth. This utility model's drill bit with rotating blades, by providing multiple fixed cutting teeth on the rotating blades, changes the contact point of the fixed cutting teeth from a fixed single-point cutting to multi-point cutting during drilling, thereby improving drill bit life.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, and in particular to a drill bit with rotating blades. Background Technology

[0002] In oil drilling, PDC (Polydioxanone Diameter) drill bits are currently the primary method of drilling. PDC drill bits typically have diamond cutting teeth welded and fixed to the body. The cutting edge gradually wears down from the contact point until it can no longer penetrate the formation. In related technologies, some drill bits replace the fixed cutting method with a rotating cutting method, where the cutting teeth are rotatably mounted on the blades via a rotating shaft. This allows the rotating cutting teeth to break rock during drilling. The rotating cutting teeth change the cutting contact point from a fixed single-point cutting to 360-degree full-edge cutting, thereby maximizing the cutting function of the cutting teeth and extending the drill bit's lifespan.

[0003] However, because the size of a single cutting tooth is small, after the cutting tooth is assembled to the blade, the blade is fixed and the small cutting tooth rotates relative to the blade through a separate rotating shaft. Since the size of the rotating shaft and the cutting tooth are not matched, the cutting tooth is relatively fragile during rock breaking and is easily damaged by impact in heterogeneous strata with alternating soft and hard textures, leading to the failure of the cutting tooth. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a drill bit with a rotating blade, on which multiple fixed cutting teeth are set. During the drilling process, the contact point of the fixed cutting teeth is changed from fixed single-point cutting to multi-point cutting during rotation by rotating the blade, so as to improve the drill bit life.

[0005] The objective of this utility model is achieved through the following technical solution: A drill bit with rotating blades includes a drill bit body, a cutting blade assembly, and a rotating blade assembly. The cutting blade assembly and the rotating blade assembly are both mounted on the drill bit body and are spaced apart in the circumferential direction of the drill bit body. The rotating blade assembly includes a rotating blade and a rotating shaft. The rotating blade is rotatably mounted on the drill bit body via the rotating shaft. The rotating blade and the cutting blade assembly are provided with a plurality of fixed cutting teeth.

[0006] Furthermore, the cutting blade assembly includes at least two first cutting blades, which are fixedly disposed on the drill body and spaced apart in the circumferential direction of the drill body; the first cutting blades are provided with a plurality of fixed cutting teeth; and the rotating blade assembly is disposed between adjacent first cutting blades.

[0007] Furthermore, the cutting blade assembly includes at least two second cutting blades, which are spaced apart from at least two first cutting blades in the circumferential direction of the drill bit body, and are also staggered in the circumferential direction of the drill bit body; the second cutting blades are detachably connected to the drill bit body; and the second cutting blades are provided with a plurality of fixed cutting teeth.

[0008] Furthermore, the rotating blade assembly is disposed between adjacent first and second cutting blades.

[0009] Furthermore, the second cutting blade is detachably connected to the drill bit body by bolts.

[0010] Furthermore, the first cutting blade has four blades, the second cutting blade has two blades, and the rotating blade assembly has two blades.

[0011] Furthermore, the drill bit body has an integrally formed blade mounting boss, which protrudes from the outer surface of the drill bit body and extends along the axial direction of the drill bit body; the rotating blade is rotatably mounted on the blade mounting boss via the rotating shaft.

[0012] Furthermore, the drill bit body is provided with a flushing nozzle, which is disposed between the rotating blade assembly and the cutting blade assembly.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: Because multiple fixed cutting teeth are set on the rotating blade, the rotating blade can rotate around the axis of the rotating shaft during the drilling process. In this way, the rotating shaft of the rotating blade has rotational motion in the axial direction of the drill body. By rotating the rotating blade, the contact point of the multiple fixed cutting teeth is changed from fixed single-point cutting to multi-point cutting in rotation, thereby improving the drill life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is an exploded structural diagram of the present invention.

[0015] In the figure: 11, rotating blade; 12, rotating shaft; 13, first cutting blade; 14, second cutting blade; 20, drill bit body; 21, flushing nozzle; 22, blade mounting boss; 30, fixed cutting teeth. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: 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.

[0017] 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.

[0018] like Figure 1 , Figure 2 as well as Figure 3 The drill bit shown includes a drill bit body 20, a cutting blade assembly, and a rotating blade 11 assembly. Both the cutting blade assembly and the rotating blade 11 assembly are mounted on the drill bit body 20 and are spaced apart in the circumferential direction of the drill bit body 20. The rotating blade 11 assembly includes a rotating blade 11 and a rotating shaft 12. The rotating blade 11 is rotatably mounted on the drill bit body 20 via the rotating shaft 12. The rotating blade 11 and the cutting blade assembly are provided with multiple fixed cutting teeth 30. It should be noted that during the use of the drill bit, the drill bit body 20 can move circumferentially around its own axis under the action of an external power structure (such as a motor) to perform rock drilling. The rotating blade 11 can rotate about the axis of the rotating shaft 12, and the axis of the rotating shaft 12 can be perpendicular to the axis of the drill bit body 20.

[0019] Based on the above structure, when using the drill bit with rotating blades of this utility model, the cutting blade assembly and the rotating blade 11 assembly can move in a circle around the axis of the drill bit body 20 under the rotation of the drill bit body 20. In this way, the multiple fixed cutting teeth 30 of the rotating blade 11 and the multiple fixed cutting teeth 30 of the cutting blade assembly can form multiple points of contact in the circumferential direction of the drill bit body 20 to perform rock breaking action, that is, to cut at multiple points in the circumferential direction of the drill bit body 20 with multiple cutting teeth.

[0020] Since multiple fixed cutting teeth 30 are provided on the rotating blade 11, the rotating blade 11 can rotate around the axis of the rotating shaft 12 during the drilling process. In this way, the rotating shaft 12 of the rotating blade 11 has rotational motion in the axial direction of the drill body 20. By rotating the rotating blade 11, the contact point of the multiple fixed cutting teeth 30 is changed from fixed single-point cutting to multi-point cutting in rotation, so as to improve the drill life.

[0021] Furthermore, in this application, since the rotating blade 11 is rotatably mounted on the drill body 20 via the rotating shaft 12, the size of the rotating shaft 12 of the rotating blade 11 matches the size of the rotating blade 11 and is set on the drill body 20, which makes the rigidity and strength of the rotating shaft 12 better and less likely to be damaged by impact in uneven layers of soft and hard materials.

[0022] Furthermore, the cutting blade assembly includes at least two first cutting blades 13, which are fixedly disposed on the drill body 20 and distributed at intervals in the circumferential direction of the drill body 20. Based on this structure, multiple fixed cutting teeth 30 can be provided on the first cutting blades 13; a rotating blade 11 assembly is provided between adjacent first cutting blades 13.

[0023] Specifically, at least two first cutting blades 13 can be integrally formed on the drill bit body 20 without a connecting structure. During the drilling process of the drill bit body 20 into the rock formation, the first cutting blades 13 integrally formed on the drill bit body 20 have good rigidity and strength, and are not prone to breakage or damage. At least two first cutting blades 13 are arranged in conjunction with the rotating blades 11 at intervals in the circumferential direction of the drill bit body 20. During the rotation of the drill bit body 20 into the rock formation, the first cutting blades 13, with good rigidity and strength, can bear the impact force during the drilling process in the circumferential direction, reducing the impact on the rotating blades 11 connected to the drill bit body 20 by the rotating shaft 12. This results in a longer service life for the rotating blades 11.

[0024] In addition, since multiple fixed cutting teeth 30 are provided on the first cutting blade 13, these fixed cutting teeth 30 have fixed single-point cutting points. During the drilling process, they work in conjunction with the dynamic cutting teeth on the rotating blade 11 to dynamically cut, making it easier to drill into the rock formation.

[0025] More specifically, the aforementioned cutting blade assembly includes at least two second cutting blades 14, which are spaced apart from at least two first cutting blades 13 in the circumferential direction of the drill body 20, and are staggered in the circumferential direction of the drill body 20. The second cutting blades 14 are detachably connected to the drill body 20, and a plurality of fixed cutting teeth 30 are provided on the second cutting blades 14.

[0026] Based on this structure, the cutter wings distributed circumferentially on the drill bit body 20 are a first cutting wing 13, a rotating wing 11, and a second cutting wing 14. Both the first cutting wing 13 and the second cutting wing 14 are fixed relative to the drill bit body 20. In this way, multiple fixed teeth on the first cutting wing 13 and the second cutting wing 14 can form more fixed single-point cutting points in the circumferential direction during the drilling process of the drill bit body 20, so that the drill bit body 20 has a stronger impact force and a better rock breaking effect during the drilling process.

[0027] Furthermore, since the second cutting blade 14 is detachably mounted on the drill body 20, it can be replaced after multiple fixed cutting teeth 30 on the second cutting blade 14 are damaged, thereby improving the service life of the drill body 20.

[0028] In this application, both the first cutting blade 13 and the second cutting blade 14 are fixed relative to the drill bit body 20. The difference is that the first cutting blade 13 is integrally formed on the drill bit body 20, ensuring the stability and durability of the drill bit body 20 during drilling. The second cutting blade 14 is detachably connected to the drill bit body 20 through a connecting structure. When the detachable second cutting blade 14 is damaged by its own fixed cutting tooth 30, only the blade needs to be replaced, without replacing the entire drill bit. This makes the drill bit stable and reduces the overall cost of using the drill bit.

[0029] Furthermore, the rotating blade 11 assembly is disposed between adjacent first cutting blades 13 and second cutting blades 14, that is, the rotating blade 11 is distributed between two first cutting blades 13 and second cutting blades 14 that are fixed relative to the drill bit body 20, so that the cutting blades fixed on the drill bit body 20 can bear the impact force on the drill bit body 20 and improve the service life of the rotating blade 11.

[0030] Furthermore, the second cutting blade 14 is detachably connected to the drill bit body 20 by bolts. That is, by machining bolt connection holes on the drill bit body 20, the bolts pass through the second cutting blade 14 and are threaded into the bolt connection holes, making disassembly and assembly convenient.

[0031] Furthermore, four first cutting blades 13, two second cutting blades 14, and two rotating blade 11 assemblies are provided. During drilling, the four fixedly connected first cutting blades 13, two rotating blades 11, and two detachable second cutting blades 14 move in a circular motion around the axis of the drill bit body. The four first cutting blades 13, two second cutting blades 14, and two rotating blades 11 are staggered in the circumferential direction. Thus, the four first cutting blades 13 are distributed at four points on the circumference of the drill bit body 20. The four integrally formed first cutting blades 13 can bear the impact force on the drill bit body 20 in the circumferential direction. The first cutting blades 13 have good rigidity and strength, so they are not easily damaged, which makes the drill bit structure stable during drilling.

[0032] The two second cutting blades 14 can be distributed diagonally in the circumferential direction, and the two rotating blades 11 are also distributed diagonally in the circumferential direction. This ensures that the force is evenly distributed and the drill bit is more stable during drilling.

[0033] Furthermore, the drill bit body 20 is integrally formed with a blade mounting boss 22, which protrudes from the outer surface of the drill bit body 20 and can extend along the axial direction of the drill bit body 20; the rotating blade 11 is rotatably mounted on the blade mounting boss 22 via the rotating shaft 12, and the second cutting blade 14 can also be assembled on the blade mounting boss 22.

[0034] Since the blade mounting boss 22 protrudes from the surface of the drill bit body 20 and is spaced apart from the first cutting blade 13, a space can be formed between the first cutting blade 13 and the blade mounting boss 22 for the rotating blade 11 to be rotated and assembled. After the rotating blade 11 is assembled on the blade mounting boss 22 via the rotating shaft 12, it can avoid the surface of the drill bit body 20 and the first cutting blade 13 during rotation, so that the rotating blade 11 can rotate smoothly.

[0035] Bolt connection holes can be machined on the aforementioned mounting boss. When the second cutting blade 14 is assembled to the drill bit body 20, the bolt passes through the second cutting blade 14 and is threaded into the bolt connection hole of the blade mounting boss 22. The blade mounting boss 22 protrudes, making it convenient for users to perform disassembly and assembly operations.

[0036] Furthermore, a flushing nozzle 21 is provided on the drill bit body 20, and the flushing nozzle 21 is located between the rotating blade 11 assembly and the cutting blade assembly. The flushing nozzle 21 can be provided on the drill bit body 20. Based on the structure of the cutting blades including the first cutting blade 13 and the second cutting blade 14, flushing nozzles 21 can be provided between the rotating blade 11, the first cutting blade 13, and the second cutting blade 14. In use, the flushing nozzle 21 can be connected to an external cleaning pipe, and cleaning water can be sprayed through the flushing nozzle 21 during drilling, which can enhance the cleaning effect of rock cuttings and effectively prevent the phenomenon of drill bit mud buildup.

[0037] 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 rotating blades, characterized in that, It includes a drill bit body, a cutting blade assembly, and a rotating blade assembly. The cutting blade assembly and the rotating blade assembly are both mounted on the drill bit body and are spaced apart in the circumferential direction of the drill bit body. The rotating blade assembly includes rotating blades and a rotating shaft. The rotating blades are rotatably mounted on the drill body via the rotating shaft. The rotating blades and the cutting blade assembly are provided with multiple fixed cutting teeth. The cutting blade assembly includes at least two first cutting blades, which are fixedly disposed on the drill body and spaced apart in the circumferential direction of the drill body. Each first cutting blade is provided with multiple fixed cutting teeth. The rotating blade assembly is disposed between adjacent first cutting blades. The cutting blade assembly includes at least two second cutting blades, which are spaced apart from at least two first cutting blades in the circumferential direction of the drill body, and are also staggered in the circumferential direction of the drill body. The second cutting blades are detachably connected to the drill body. Each second cutting blade is provided with multiple fixed cutting teeth.

2. The drill bit with rotating blades according to claim 1, characterized in that, The rotating blade assembly is disposed between adjacent first and second cutting blades.

3. The drill bit with rotating blades according to claim 1, characterized in that, The second cutting blade is detachably connected to the drill bit body by bolts.

4. The drill bit with rotating blades according to claim 1, characterized in that, The first cutting blade has four blades, the second cutting blade has two blades, and the rotating blade assembly has two blades.

5. The drill bit with rotating blades according to claim 1, characterized in that, The drill bit body has an integrally formed blade mounting boss, which protrudes from the outer surface of the drill bit body and extends along the axial direction of the drill bit body; the rotating blade is rotatably mounted on the blade mounting boss via the rotating shaft.

6. The drill bit with rotating blades according to any one of claims 1-5, characterized in that, The drill bit body is provided with a flushing nozzle, which is located between the rotating blade assembly and the cutting blade assembly.

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