Diamond compact drill bit capable of preventing drill jamming for coal mine
By designing arc-shaped triangle reinforcement blocks and second cutting teeth on the diamond composite drill bit, the gravel on the well wall is blocked and crushed, and discharged through the chip guide groove, the problem of drill bit stuck is solved, and the stability and chip removal efficiency of the drill bit are improved.
Patent Information
- Application Number
- CN202421959036.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In horizontal section drilling, it is difficult for mud to take away the rock chip cut from the diamond composite drill bit, causing the rock chip to accumulate in the inclined surface of the drill bit gauge and squeeze into the gap between the drill bit and the well wall, increasing friction and easily causing the drill bit to get stuck, resulting in drilling accidents.
A diamond composite drill bit for anti-blocking drill for coal mines was designed, using eight triangular reinforcement blocks and a second cutting teeth that were distributed in arc shape to prevent the gravel from falling and crushing it, and discharged through the chip guide groove to prevent the gravel from entering the gap between the drill bit and the well wall.
It effectively reduces the risk of drill bit stuck, improves the stability and chip removal efficiency of drill bits, and reduces drilling accidents during drilling.
Smart Images
Figure CN222909936U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diamond composite bit, and particularly relates to a diamond composite bit for preventing sticking in coal mines. Background Technique
[0002] Since diamond composite bits are mostly used in coal mine drilling operations and are drilled in medium-soft formations and hard interlayers, a good chip removal function is required. At the same time, larger debris is difficult to discharge, so a good chip breaking function is also required.
[0003] During the drilling process, some formations are unstable, and the wellbore wall is prone to sloughing and falling to the bottom of the well. In horizontal section drilling, the mud is not easy to carry away the cuttings cut by the diamond composite bit. The sloughing and cuttings are easy to accumulate on the inclined surface of the bit gauge, and are continuously squeezed into the gap between the bit gauge surface and the wellbore wall, resulting in an increase in the friction between the bit and the wellbore wall. Especially during the process of lifting the bit, it is extremely easy to cause the bit to get stuck, resulting in a drilling sticking accident. Content of the Utility Model
[0004] (1) Technical Problems to be Solved
[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a diamond composite bit for preventing sticking in coal mines, which can solve the problem that in horizontal section drilling, the mud is not easy to carry away the cuttings cut by the diamond composite bit, and the sloughing and cuttings are easy to accumulate on the inclined surface of the bit gauge and are continuously squeezed into the gap between the bit gauge surface and the wellbore wall, resulting in an increase in the friction between the bit and the wellbore wall. Especially during the process of lifting the bit, it is extremely easy to cause the bit to get stuck, resulting in a drilling sticking accident.
[0006] (2) Technical Solutions
[0007] To achieve the above purpose, the utility model provides the following technical solutions: A diamond composite bit for preventing sticking in coal mines includes a bit body, and a shank is welded on the upper surface of the bit body;
[0008] Eight triangular reinforcing blocks are welded on the outer surface of the shank and are distributed in an arc shape. Multiple chip guiding grooves are formed at the intervals between the eight triangular reinforcing blocks distributed in an arc shape;
[0009] Among them, when the bit body is working, when the gravel on the wellbore wall falls, the eight triangular reinforcing blocks distributed in an arc shape will prevent the gravel from continuing to fall downward, so that the gravel falls onto the arc of the triangular reinforcing blocks.
[0010] Preferably, second cutting teeth are fixedly connected to the protruding parts of the eight triangular reinforcing blocks. There is a certain gap between the eight second cutting teeth and the wellbore wall. The crushed stones will be crushed by cooperating with the wellbore wall through the gap and discharged through multiple chip guiding grooves, preventing them from being squeezed into the gap between the gauge surface and the wellbore wall, greatly reducing the occurrence of sticking of the drill.
[0011] Preferably, a connector is welded to the upper surface of the handle rod, and eight arc-shaped chip discharging grooves are formed on the outer surface of the drill bit body in an arc-shaped distribution. The arc-shaped surfaces of the eight arc-shaped chip discharging grooves can reduce the friction during chip discharging and improve the chip discharging speed.
[0012] Preferably, a plurality of first cutting teeth are fixedly welded to the outer surface of the drill bit body, and a circular groove is formed on the lower surface of the drill bit body.
[0013] Preferably, a circular reinforcing block is fixedly connected to the inner wall of the circular groove.
[0014] Preferably, a plurality of third cutting teeth are fixedly connected to the lower surface of the circular reinforcing block in an annular distribution.
[0015] (III) Beneficial effects
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] (1). For the diamond composite drill bit for preventing sticking in coal mines, when the crushed stones on the wellbore wall fall, the eight triangular reinforcing blocks distributed in an arc shape will prevent the crushed stones from continuing to fall downward, causing the crushed stones to fall onto the arc-shaped parts of the triangular reinforcing blocks. There is a certain gap between the eight second cutting teeth and the wellbore wall. The crushed stones will be crushed by cooperating with the wellbore wall through the gap and discharged through multiple chip guiding grooves, preventing them from being squeezed into the gap between the gauge surface and the wellbore wall, greatly reducing the occurrence of sticking of the drill.
[0018] (2). For the diamond composite drill bit for preventing sticking in coal mines, when the drill bit body is working, the circular reinforcing block and the third cutting teeth will first contact the cutting surface. The third cutting teeth cut the directly below of the wellbore wall, and cooperate with the plurality of first cutting teeth to cut the periphery of the wellbore wall. The design of separating the circular reinforcing block from the plurality of first cutting teeth can reduce the pressure borne by the plurality of first cutting teeth and improve the stability of the drill bit body during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following further describes the present utility model in conjunction with the drawings and embodiments:
[0020] Figure 1 is a schematic structural diagram of the whole of the present utility model;
[0021] Figure 2 is a schematic upper surface diagram of the whole of the present utility model;
[0022] Figure 3 This is a bottom view schematic diagram of the drill bit body of the present utility model.
[0023] Reference numerals: 1, connecting head; 2, triangular reinforcing block; 3, shank; 4, drill bit body; 5, first cutting tooth; 6, arc-shaped chip removal groove; 7, second cutting tooth; 8, chip guiding groove; 9, third cutting tooth; 10, circular reinforcing block; 11, circular groove. Detailed implementation manners
[0024] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.
[0025] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.
[0026] In the description of the present utility model, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.
[0027] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.
[0028] Please refer to Figures 1-3 , the present utility model provides a technical solution: a diamond composite drill bit for preventing drill sticking in coal mines, including a drill bit body 4, and a shank 3 is welded to the upper surface of the drill bit body 4;
[0029] Among them, eight arc-shaped triangular reinforcing blocks 2 are welded to the outer surface of the shank 3, and a plurality of chip guiding grooves 8 are formed at the intervals between the eight arc-shaped triangular reinforcing blocks 2;
[0030] Among them, when the drill bit body 4 is working and gravel on the wellbore wall falls, the eight arc-shaped distributed triangular reinforcing blocks 2 will prevent the gravel from continuing to fall downward, causing the gravel to fall onto the arc-shaped parts of the triangular reinforcing blocks 2.
[0031] Furthermore, second cutting teeth 7 are fixedly connected to the protruding parts of the eight triangular reinforcing blocks 2. There is a certain gap between the eight second cutting teeth 7 and the wellbore wall. The gravel will be crushed by cooperating with the wellbore wall through the gap and discharged through multiple chip guiding grooves 8, preventing it from being squeezed into the gap between the gauge surface and the wellbore wall, greatly reducing the occurrence of sticking of the drill.
[0032] Furthermore, a connector 1 is welded to the upper surface of the shank 3, and eight arc-shaped distributed arc-shaped chip discharging grooves 6 are formed on the outer surface of the drill bit body 4. The arc-shaped surfaces of the eight arc-shaped chip discharging grooves 6 can reduce the friction during chip discharging and improve the chip discharging speed.
[0033] Furthermore, a plurality of first cutting teeth 5 are fixedly welded to the outer surface of the drill bit body 4, and a circular groove 11 is formed on the lower surface of the drill bit body 4.
[0034] Furthermore, a circular reinforcing block 10 is fixedly connected to the inner wall of the circular groove 11.
[0035] Furthermore, a plurality of third cutting teeth 9 distributed in a ring shape are fixedly connected to the lower surface of the circular reinforcing block 10.
[0036] Among them, when the drill bit body 4 is working, the circular reinforcing block 10 and the third cutting teeth 9 will first contact the cutting surface. The third cutting teeth 9 cut the directly below of the wellbore wall, and cooperate with the plurality of first cutting teeth 5 to cut the periphery of the wellbore wall. The design of separating the circular reinforcing block from the plurality of first cutting teeth 5 can reduce the pressure borne by the plurality of first cutting teeth 5 and improve the stability of the drill bit body 4 during work.
[0037] Working principle: When the drill bit body 4 is working and gravel on the wellbore wall falls, the eight arc-shaped distributed triangular reinforcing blocks 2 will prevent the gravel from continuing to fall downward, causing the gravel to fall onto the arc-shaped parts of the triangular reinforcing blocks 2. There is a certain gap between the eight second cutting teeth 7 and the wellbore wall. The gravel will be crushed by cooperating with the wellbore wall through the gap and discharged through multiple chip guiding grooves 8, preventing it from being squeezed into the gap between the gauge surface and the wellbore wall, greatly reducing the occurrence of sticking of the drill. When the drill bit body 4 is working, the circular reinforcing block 10 and the third cutting teeth 9 will first contact the cutting surface. The third cutting teeth 9 cut the directly below of the wellbore wall, and cooperate with the plurality of first cutting teeth 5 to cut the periphery of the wellbore wall. The design of separating the circular reinforcing block from the plurality of first cutting teeth 5 can reduce the pressure borne by the plurality of first cutting teeth 5.
[0038] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.
Claims
1. A diamond composite drill bit for preventing drilling jams for coal mines, characterized in that: include: A drill bit body (4), the upper surface of which is welded with a handle rod (3); The outer surface of the handle rod (3) is welded with eight arc-shaped triangular reinforcement blocks (2), and a plurality of chip guide grooves (8) are formed at intervals between the eight arc-shaped triangular reinforcement blocks (2); When the drill bit body (4) is working, when the gravel on the well wall falls, the eight arc-shaped triangular reinforcement blocks (2) will prevent the gravel from falling further downward, so that the gravel falls onto the arc of the triangular reinforcement blocks (2); The protruding parts of the eight triangular reinforcement blocks (2) are all fixedly connected with second cutting teeth (7). There are gaps between the eight second cutting teeth (7) and the well wall. The broken stones are crushed by cooperating with the well wall through the gaps and discharged through a plurality of chip guide grooves (8) to avoid being squeezed into the gap between the gauge surface and the well wall, thereby greatly reducing the occurrence of drill jamming.
2. The anti-drilling diamond composite drill bit for coal mines according to claim 1, characterized in that: A connector (1) is welded to the upper surface of the handle (3), and eight arc-shaped chip removal grooves (6) distributed in an arc shape are provided on the outer surface of the drill body (4). The arc-shaped surfaces of the eight arc-shaped chip removal grooves (6) can reduce friction during chip removal and increase chip removal speed.
3. The anti-drilling diamond composite drill bit for coal mines according to claim 1, characterized in that: A plurality of first cutting teeth (5) are fixedly welded to the outer surface of the drill bit body (4), and a circular groove (11) is provided on the lower surface of the drill bit body (4).
4. The anti-drilling diamond composite drill bit for coal mines according to claim 3, characterized in that: A circular reinforcement block (10) is fixedly connected to the inner wall of the circular groove (11).
5. The anti-drilling diamond composite drill bit for coal mines according to claim 4, characterized in that: A plurality of third cutting teeth (9) distributed in an annular shape are fixedly connected to the lower surface of the circular reinforcement block (10).