Matrix drill bit

Abstract

The utility model discloses a matrix drill bit which is characterized in that the matrix drill bit comprises a matrix which comprises a straight nozzle and a drilling structure arranged on the lip surface of the matrix, the straight nozzle divides the matrix into a plurality of fan-shaped working blocks, the drilling structure comprises at least one sharp tooth and a plane tooth, and the sharp tooth is flush with the plane tooth in height; a thread structure is arranged on the inner wall of the drill bit body; and the transition part is integrally formed with the matrix and is fixedly connected with the drill bit body. Through the design, the arrangement number of the plane teeth and the sharp teeth is reasonably matched, the advantages of abrasion resistance of the plane teeth and high drilling speed of the sharp teeth are absorbed, and the plane teeth and the sharp teeth are combined, so that the drill bit has certain abrasion resistance and high drilling speed.

Description

Technical Field

[0001] The utility model belongs to the field of drilling equipment, in particular to a matrix drill bit. Background Art

[0002] As a commonly used equipment component in the field of exploration, the tooth structure of the drill bit's body lip has always been the focus of drill bit improvement and optimization. The top of the tooth structure normally includes flat and pointed teeth. These two shapes have their own advantages and disadvantages. The top structure of the flat type is not easy to wear and can extend the service life of the drill bit, but the drilling speed is slow. The top structure of the pointed tooth has a fast drilling speed, but is easy to wear and has a short service life. Therefore, it is necessary to provide a matrix drill bit that combines pointed teeth with flat teeth. Utility Model Content

[0003] The utility model aims to provide a matrix drill bit to solve the technical problems that the tooth structure of the drill bit matrix lip is too simple, the top of the flat tooth shape has a slow drilling speed, and the top of the pointed tooth shape wears quickly and has a short life.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A carcass drill bit, characterized in that it comprises: a carcass: comprising a straight water inlet and a drilling structure arranged on the carcass lip surface, wherein the straight water inlet divides the carcass into a plurality of fan-shaped working blocks, wherein the drilling structure comprises at least one pointed tooth and one flat tooth, wherein the pointed tooth is flush with the flat tooth in height; a drill bit body: the inner wall of which is provided with a threaded structure; a transition part: formed integrally with the carcass and fixedly connected to the drill bit body. Through such a design, the number of flat teeth and pointed teeth is reasonably matched, the advantages of the flat teeth being wear-resistant and the pointed teeth being fast in drilling speed are absorbed, and the two are combined, so that the drill bit has both certain wear resistance and fast drilling speed.

[0006] Furthermore, the straight water inlets are arranged in a uniform circular array with the center axis of the carcass as the axis. With such a design, the drill bit generates heat due to friction during drilling, and when coolant is passed through the inner wall of the drill bit to cool it down, the coolant can flow from the straight water inlets to the outer wall of the drill bit, and cool the inner and outer walls of the drill bit at the same time, thereby enhancing the cooling effect.

[0007] Furthermore, the drilling structure includes a pointed tooth and two flat teeth, wherein the pointed tooth is arranged between the two flat teeth, wherein one side wall of the flat tooth is coplanar with the outer side wall of the carcass; and one side wall of the other flat tooth is coplanar with the inner side wall of the carcass. With such a design, the two flat teeth are respectively located on the inner and outer sides of the carcass lip surface, and the inner and outer sides of the carcass are the parts where the entire drill bit and the drilled material have the most friction and are also the parts that are most susceptible to wear. Arranging the flat teeth here can maximize the service life of the drill bit of the disclosed tooth shape.

[0008] Furthermore, the top angle of the pointed teeth is 90°. With such a design, the angle of the pointed teeth also affects the service life and drilling speed of the drill bit. A small angle means a fast drilling speed and a short service life, while a large angle means a slow drilling speed and a long service life. The pointed teeth with an angle of 90° are the most preferred.

[0009] Furthermore, the concave portion of the drilling structure is a guide groove. Through such a design, the coolant flows in the guide groove to cool the carcass lip surface.

[0010] Furthermore, the bottom angle of the guide groove between the pointed teeth and the flat teeth is 90°. With such a design, the bottom angle of the guide groove needs to be restricted by the height of the pointed teeth, the angle of the pointed teeth and the thickness of the tire body wall. The pointed tooth angle of 90° is preferred. The flow channel reserved for the coolant in the guide groove will not be too wide to increase the tire body wall thickness, nor too narrow to cause poor coolant flow.

[0011] Furthermore, the transition part is uniformly embedded with a plurality of polycrystals. With such a design, the transition part will wear out when the drill bit rotates and drills underground, and the polycrystals will slightly protrude from the outer wall of the transition part, and the polycrystals will protect the transition part from contacting the drilled object first, thereby extending the service life of the drill bit.

[0012] Furthermore, a heat dissipation structure is provided on one side of the transition portion close to the straight water outlet. Through such a design, the heat dissipation effect of the straight water outlet is enhanced.

[0013] Furthermore, the heat dissipation structure is a curved surface, a concave curved surface and a step surface. Through such a design, the coolant flows more smoothly in the straight water outlet, thereby enhancing the cooling effect.

[0014] The beneficial effects of the utility model are as follows: the number of plane teeth and pointed teeth is reasonably matched, the advantages of the plane teeth's wear resistance and the pointed teeth's fast drilling speed are absorbed, and the two are combined, so that the drill bit has both certain wear resistance and fast drilling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the lip surface structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the carcass and transition part of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the fan-shaped working block and part of the transition part of the utility model;

[0020] Figure 6 It is a schematic diagram of the planing structure of the utility model;

[0021] Figure 7 It is a cross-sectional schematic diagram of the heat dissipation structure of different structures of the utility model;

[0022] Explanation of the markings in the figure: 1. Carcass; 2. Straight water inlet; 3. Lip surface; 4. Fan-shaped working block; 5. Pointed teeth; 6. Flat teeth; 7. Thread structure; 8. Guide groove; 9. Polycrystalline; 10. Heat dissipation structure; 11. Drill body; 12. Transition part. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] Example 1

[0025] A carcass drill bit, characterized in that it comprises: a carcass 1, comprising a straight water inlet 2 and a drilling structure arranged on a lip surface 3 of the carcass 1, the straight water inlet 2 divides the carcass 1 into a plurality of fan-shaped working blocks 4, the drilling structure comprises at least one pointed tooth 5 and one flat tooth 6, the pointed tooth 5 is flush with the flat tooth 6; a drill body 11, the inner wall of which is provided with a threaded structure 7; a transition portion 12, which is integrally formed with the carcass 1 and fixedly connected to the drill body 11.

[0026] The straight water inlets 2 are arranged in a uniform circular array with the central axis of the carcass 1 as the axis.

[0027] The implementation method of the above embodiment is: the pointed teeth 5 and the flat teeth 6 are matched, the pointed teeth 5 improve the drilling speed of the drill bit, and the flat teeth 6 optimize the service life of the drill bit. When the coolant is passed through the inner wall of the drill bit for cooling, the coolant can flow from the straight water outlet 2 to the outer wall of the drill bit, and at the same time cool the inner and outer walls of the drill bit to enhance the cooling effect.

[0028] Example 2

[0029] The drilling structure includes a pointed tooth 5 and two flat teeth 6. The pointed tooth 5 is arranged between the two flat teeth 6. One side wall of one flat tooth 6 is coplanar with the outer side wall of the carcass 1; one side wall of the other flat tooth 6 is coplanar with the inner side wall of the carcass 1.

[0030] The implementation method of the above embodiment is as follows: the two planar teeth 6 are respectively located on the inner and outer sides of the lip surface 3 of the matrix 1. The inner and outer sides of the matrix 1 are the parts where the entire drill bit and the drilled material have the most friction and are also the parts that are most susceptible to wear. Setting the planar teeth 6 here can maximize the service life of the drill bit with the tooth shape disclosed in the present invention.

[0031] Example 3

[0032] The top angle of the pointed teeth 5 is 90°.

[0033] The concave part of the drilling structure is a guide groove 8.

[0034] The bottom angle of the guide groove 8 between the pointed teeth 5 and the flat teeth 6 is 90°.

[0035] The implementation of the above embodiment is as follows: the angle of the pointed teeth 5 also affects the service life and drilling speed of the drill bit. A small angle means a fast drilling speed and a short service life, while a large angle means a slow drilling speed and a long service life. The pointed teeth 5 with an angle of 90° are the most preferred. The angle at the bottom of the guide groove 8 needs to be restricted by the height of the pointed teeth 5, the angle of the pointed teeth 5 and the thickness of the tire wall of the tire body 1. The angle of the pointed teeth 5 with an angle of 90° is the preferred one. The flow channel reserved for the coolant by the guide groove 8 will not be too wide to increase the wall thickness of the tire body 1, nor will it be too narrow to cause poor flow of the coolant.

[0036] Example 4

[0037] The transition portion 12 is uniformly embedded with a plurality of polycrystals 9 .

[0038] The implementation method of the above embodiment is: when the drill bit rotates and drills underground, the transition part will wear out, and the polycrystal will slightly protrude from the outer wall of the transition part. The polycrystal will protect the transition part from contacting the drilled object first, thereby extending the service life of the drill bit.

[0039] Example 5

[0040] A heat dissipation structure 10 is provided on one side of the transition portion 12 close to the straight water outlet 2 .

[0041] The heat dissipation structure 10 is an arc surface, a concave arc surface and a step surface.

[0042] The implementation method of the above embodiment is as follows: the design of the heat dissipation structure 10 increases the contact area between the coolant and the drill bit, and expands the volume of the straight water outlet 2, so that the flow of the coolant is smoother.

[0043] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A matrix drill bit, characterized in that: include: Carcass (1): comprising a straight water inlet (2) and a drilling structure arranged on a lip surface (3) of the carcass (1), wherein the straight water inlet (2) divides the carcass (1) into a plurality of fan-shaped working blocks (4), and the drilling structure comprises at least one pointed tooth (5) and one flat tooth (6), wherein the pointed tooth (5) is flush with the flat tooth (6); Drill bit body (11): the inner wall of which is provided with a thread structure (7); Transition portion (12): formed integrally with the carcass (1) and fixedly connected to the drill bit body (11).

2. The matrix drill bit according to claim 1, characterized in that: The straight water inlets (2) are arranged in a uniform circular array with the central axis of the carcass (1) as the axis.

3. The matrix drill bit according to claim 1, characterized in that: The drilling structure comprises a pointed tooth (5) and two planar teeth (6), wherein the pointed tooth (5) is arranged between the two planar teeth (6), wherein one side wall of one planar tooth (6) is coplanar with the outer side wall of the carcass (1), and one side wall of the other planar tooth (6) is coplanar with the inner side wall of the carcass (1).

4. The matrix drill bit according to claim 3, characterized in that: The top angle of the pointed teeth (5) is 90°.

5. The matrix drill bit according to claim 1, characterized in that: The concave portion of the drilling structure is a guide groove (8).

6. The matrix drill bit according to claim 3, characterized in that: The bottom angle of the guide groove (8) between the pointed teeth (5) and the flat teeth (6) is 90°.

7. The matrix drill bit according to claim 1, characterized in that: The transition portion (12) is uniformly embedded with a plurality of polycrystals (9).

8. The matrix drill bit according to claim 1, characterized in that: A heat dissipation structure (10) is provided on a side of the transition portion (12) close to the straight water outlet (2).

9. The matrix drill bit according to claim 8, characterized in that: The heat dissipation structure (10) is a curved surface, a concave curved surface and a step surface.

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