CN213392002U

CN213392002U - Diamond compact bit

Info

Publication number: CN213392002U
Application number: CN202022293248.5U
Authority: CN
Inventors: 肖龙; 陈潜; 唐勇; 范肖敏
Original assignee: Shenzhen Haimingrun Superhard Materials Co ltd
Current assignee: Shenzhen Haimingrun Superhard Materials Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-06-08
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a diamond compact piece drill bit, including drill bit main part, wing, cutting teeth and nozzle, the cloth tooth of wing is asynchronous multitrack structure: cutting teeth at different positions are respectively embedded on the plurality of blades, and the movement tracks of the cutting teeth at different positions are different; the cutting teeth include a main cutting tooth and an auxiliary cutting tooth, and the chamfer of the main cutting tooth is larger than the chamfer of the auxiliary cutting tooth. The teeth of the blades of the utility model are in asynchronous multi-track structure, and the movement tracks of the cutting teeth at different positions are different, which is beneficial to improving the rock breaking efficiency of the drill bit; the chamfer of main cutting tooth is greater than the chamfer of supplementary cutting tooth, because the drill bit main cutting tooth bears stronger impact in cutting process, and main cutting tooth adopts great chamfer, helps promoting cutting tooth shock resistance to promote the shock resistance of drill bit, improve the drill bit life-span, the utility model discloses an optimize wing cloth tooth structure and cutting tooth structure, greatly promoted and visited brill efficiency and drill bit life-span.

Description

Diamond compact bit

Technical Field

The utility model relates to a probing drilling equipment technical field especially relates to a diamond compact piece drill bit.

Background

During drilling, the drill bit is the primary tool for breaking rock and the borehole is formed by the drill bit breaking rock. The length of time a wellbore can take to form is related to the degree of mutual matching between the drill bit and the formation, in addition to the characteristics of the rock of the formation being drilled and the properties of the drill bit itself. The reasonable type selection of the drill bit plays an important role in improving the drilling speed and reducing the comprehensive drilling cost.

At present, in geological and mine exploration, in order to ensure mining safety, construction of a gas drainage hole, a water drainage hole and a grouting hole is required to prevent water seepage, gas explosion and roof collapse. Compared with the early hard alloy drill bit, the diamond compact bit is widely applied due to long service life and high efficiency, and the drilling efficiency is greatly improved.

Wherein, traditional drag bit, indent drill bit and flat drill bit all have the certainty of self, can not adapt to the requirement to drill bit life-span and drilling efficiency down, above-mentioned traditional drill bit defect as follows:

1. the movement tracks of the plurality of cutting teeth of the drag bit and the inner concave bit are superposed, so that the rock breaking efficiency is low;

2. the flat-bottom drill bit has small chip removal space, poor chip removal capability and low drilling efficiency;

3. the main cutting teeth and the auxiliary cutting teeth are not designed in a specific structure, the main cutting teeth fail early, and the service life of the drill bit is reduced;

in conclusion, the traditional drill bit has low rock breaking efficiency, slow chip removal, short service life, low production efficiency and high labor intensity.

Therefore, the prior art has yet to be improved.

Disclosure of Invention

The inventor finds that the drill bit in the prior art has low rock breaking efficiency, slow chip removal, short service life, low production efficiency and high labor intensity, and is not beneficial to improving the drilling efficiency, prolonging the service life and reducing the cost.

The present invention aims to alleviate or solve at least one of the above mentioned problems to at least some extent. The utility model provides a diamond compact piece drill bit, including drill bit main part, wing, cutting teeth and nozzle, the top circumference of drill bit main part is provided with a plurality of wings, inlay respectively on the wing and be equipped with the cutting teeth, it is adjacent be provided with nozzle, its characterized in that between the wing:

the cloth tooth of blade is asynchronous multitrack structure: cutting teeth at different positions are respectively embedded on the plurality of blades, and the movement tracks of the cutting teeth at different positions are different;

the cutting teeth comprise main cutting teeth and auxiliary cutting teeth, the main cutting teeth and the auxiliary cutting teeth are provided with chamfers, and the chamfers of the main cutting teeth are larger than the chamfers of the auxiliary cutting teeth.

In one embodiment, the chamfer of the primary cutting tooth ranges from 0 to 0.70 and the chamfer of the secondary cutting tooth ranges from 0 to 0.35.

In one embodiment, the ratio of the maximum height of the blade shoulder to the bit diameter is greater than 0.25.

In one embodiment, the cutting depth of the cutting teeth at different positions is not uniform.

In one embodiment, the difference in cutting depth of the cutting teeth at different positions ranges from 0 to 2 mm.

In one embodiment, the number of the blades is 4, and the teeth of the blades are in an asynchronous multi-track structure, and the blades comprise a first blade, a second blade, a third blade and a fourth blade, and the first blade is provided with a first cutting tooth; a second cutting tooth is arranged on the second blade; a third cutting tooth is arranged on the third blade; a fourth cutting tooth is arranged on the fourth blade;

the first cutting tooth comprises a first main cutting tooth and a first auxiliary cutting tooth, the second cutting tooth comprises a second main cutting tooth and a second auxiliary cutting tooth, the third cutting tooth comprises a third main cutting tooth and a third auxiliary cutting tooth, and the fourth cutting tooth comprises a fourth main cutting tooth and a fourth auxiliary cutting tooth;

the motion tracks of the first main cutting tooth, the first auxiliary cutting tooth, the second main cutting tooth, the second auxiliary cutting tooth, the third main cutting tooth, the third auxiliary cutting tooth, the fourth main cutting tooth and the fourth auxiliary cutting tooth are all different;

the first main cutting tooth, the first auxiliary cutting tooth, the second main cutting tooth, the second auxiliary cutting tooth, the third main cutting tooth, the third auxiliary cutting tooth, the fourth main cutting tooth and the fourth auxiliary cutting tooth have different heights, and the cutting depths of the first main cutting tooth, the first auxiliary cutting tooth, the second main cutting tooth, the second auxiliary cutting tooth, the third main cutting tooth, the third auxiliary cutting tooth, the fourth main cutting tooth and the fourth auxiliary cutting tooth are different.

In one embodiment, the cutting tooth is a planar diamond compact.

In one embodiment, the cutting tooth is a spherical diamond compact.

In one embodiment, the cutting teeth have a diameter in the range of 13mm to 20 mm;

in one embodiment, the blades are linear blades or spiral blades, and the blades are arranged asymmetrically.

The utility model has the advantages that: the teeth of the blades of the utility model are in asynchronous multi-track structure, and the movement tracks of the cutting teeth at different positions are different, which is beneficial to improving the rock breaking efficiency of the drill bit; the chamfer of main cutting tooth is greater than the chamfer of supplementary cutting tooth, because the drill bit main cutting tooth bears stronger impact in cutting process, and main cutting tooth adopts great chamfer, helps promoting cutting tooth shock resistance to promote the shock resistance of drill bit, improve the drill bit life-span, the utility model discloses an optimize wing cloth tooth structure and cutting tooth structure, greatly promoted and visited brill efficiency and drill bit life-span.

Drawings

Fig. 1 is a schematic perspective view of a diamond compact drill bit according to the present invention.

Fig. 2 is a schematic view of a certain viewing angle of a diamond compact drill bit according to the present invention.

Fig. 3 is a cross-sectional view of a diamond compact drill bit according to the present invention.

Fig. 4 is a schematic diagram of a cutting trajectory of a diamond compact drill bit according to the present invention.

Fig. 5 is a schematic structural view of a cutting tooth provided by the present invention.

Fig. 6 is a schematic diagram of an embodiment of a diamond compact drill bit according to the present invention.

Reference numerals:

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Based on the problems in the prior art, the present embodiment provides a diamond compact bit, as shown in fig. 1, including a bit body 100, blades 200, cutting teeth 300, and a nozzle 400, wherein a plurality of blades 200 are circumferentially disposed on a top of the bit body 100, the cutting teeth 300 are respectively embedded on the blades 200, the nozzle 400 is disposed on the bit body 100 between adjacent blades 200,

the teeth of the blade 200 are in an asynchronous multi-track structure: cutting teeth 300 at different positions are respectively embedded on the plurality of blades 200, and with reference to fig. 4, the movement tracks of the cutting teeth 300 at different positions are different, that is, the movement tracks of the cutting teeth 300 at different positions are not overlapped; the cutting tooth 300 includes a main cutting tooth 310 and an auxiliary cutting tooth 320, the main cutting tooth 310 and the auxiliary cutting tooth 320 are provided with chamfers, and the chamfer a of the main cutting tooth is greater than the chamfer B of the auxiliary cutting tooth.

The utility model discloses the cloth tooth of well wing is asynchronous multitrack structure, wherein inlays the cutting teeth that are equipped with different positions on the wing respectively, and the motion orbit of the cutting teeth of different positions all is different to the height of cutting teeth differs, and thus the depth of cut of cutting teeth is different, and the time that the cutting teeth cut into the rock is different, and then the cutting teeth appear cutting asynchronous multitrack characteristic in the cutting process, is favorable to promoting the broken rock efficiency of drill bit; the utility model provides a chamfer of main cutting tooth is greater than the chamfer of supplementary cutting tooth, because the drill bit main cutting tooth bears stronger impact in cutting process, and main cutting tooth adopts great chamfer, helps promoting cutting tooth shock resistance to promote the shock resistance of drill bit, improve the drill bit life-span, the utility model discloses an optimize wing cloth tooth structure and cutting tooth structure, greatly promoted and visited brill efficiency and drill bit life-span.

Specifically, as shown in fig. 1 and 2, a plurality of blades 200 are circumferentially arranged on the top of the drill body 100, and the number of the blades 200 may be 3 or more than 3 according to actual needs, such as according to cutting and chip removal requirements of the drill, and the blades 200 are used for mounting the main cutter 310 and the auxiliary cutter 320. Wherein the main cutting tooth 310 is installed at the shoulder or the nose of the blade 200, and the main cutting tooth 310 is fixedly connected with the blade 200; the auxiliary cutting teeth 310 are installed at the outer radial surface and the core of the wing blade 200.

Specifically, as shown in fig. 5, the chamfer a of the main cutting tooth has a value ranging from 0 to 0.70, the chamfer B of the auxiliary cutting tooth has a value ranging from 0 to 0.35, the selection of the chamfer belongs to details, the importance of the chamfer is easily ignored, and in practice, many failure cases are related to the selection of the chamfer. The chamfer angle is selected to be combined with the use requirement, the stress condition, such as bearing of larger force, suggests that the potential problem of the chamfer angle as a stress concentration point is considered, and the large chamfer angle is selected, so that the main cutting tooth adopts the larger chamfer angle, the impact resistance of the cutting tooth is favorably improved, the impact resistance of the drill bit is improved, and the service life of the drill bit is prolonged. Meanwhile, the auxiliary cutting teeth adopt smaller chamfer angle processing, and the aggressiveness of the drill bit is not reduced.

In one embodiment, as shown in fig. 4, the blades 200 are respectively embedded with cutting teeth 300 at different positions, wherein the cutting teeth 300 have different heights, and thus the cutting depths of the cutting teeth 300 at different positions are different. The utility model discloses on the compound piece drill bit of diamond, adopt the cloth tooth design of asynchronous multitrack, not only guarantee that every piece cutting teeth 300 has different cutting orbit, different wing cutting teeth have certain difference in height moreover, let the drill bit eat the rock more high-efficient, and is specific, and the poor X scope of depth of cut of the cutting teeth of different positions is 0-2 mm.

In one embodiment, blade 200 is a linear blade or a spiral blade, and the plurality of blades are asymmetrically arranged, wherein the ratio of the maximum height L of the blade shoulder to the drill diameter D is greater than 0.25, as shown in fig. 3, and the ratio of the maximum height I of the blade side to the drill diameter D is greater than 0.15.

In one embodiment, the cutting teeth 300 are planar diamond compacts, which are made by sintering diamond micro powder and a cemented carbide substrate under ultrahigh pressure and high temperature conditions, have the high hardness, high wear resistance and thermal conductivity of diamond, and the strength and impact toughness of cemented carbide, and are ideal materials for manufacturing cutting tools, drilling bits and other wear-resistant tools. The plane type diamond composite sheet is suitable for drilling soft to medium hard geology and has higher impact toughness and thermal stability, and the heat-resisting temperature can reach 750 ℃.

In one embodiment, the cutting tooth 300 is a spherical diamond compact. The spherical diamond composite sheet is suitable for cutting and processing non-metal, non-ferrous metal and other metals such as high-hardness alloy, ceramics and the like, has higher hardness and wear resistance and has high cutting precision. The spherical diamond compact can be selected in the stratum with high impact resistance requirement, and the impact resistance is further improved.

In one embodiment, the diamond compact cutter may be selected to have different diameters, depending on drilling efficiency and impact resistance requirements, with the diameter of the cutter 300 preferably ranging from 13mm to 20 mm.

In one embodiment, as shown in fig. 6, the number of blades 200 is 4, and the teeth of the blades 200 are in an asynchronous multi-track structure, which is as follows: the blade 200 includes a first blade 210, a second blade 220, a third blade 230 and a fourth blade 240, and the first blade 210 is provided with a first cutting tooth; a second cutting tooth is arranged on the second blade 220; a third cutting tooth is arranged on the third blade 230; a fourth cutting tooth is arranged on the fourth blade 240;

the first cutting teeth comprise a first main cutting tooth 311 and a first auxiliary cutting tooth 321, the second cutting teeth comprise a second main cutting tooth 312 and a second auxiliary cutting tooth 322, the third cutting teeth comprise a third main cutting tooth 313 and a third auxiliary cutting tooth 314, and the fourth cutting teeth comprise a fourth main cutting tooth 314 and a fourth auxiliary cutting tooth 324;

referring to fig. 4, the motion tracks of the first main cutting tooth 311, the first auxiliary cutting tooth 321, the second main cutting tooth 312, the second auxiliary cutting tooth 322, the third main cutting tooth 313, the third auxiliary cutting tooth 323, the fourth main cutting tooth 314 and the fourth auxiliary cutting tooth 324 are all different;

the first main cutting tooth 311, the first auxiliary cutting tooth 321, the second main cutting tooth 312, the second auxiliary cutting tooth 322, the third main cutting tooth 313, the third auxiliary cutting tooth 323, the fourth main cutting tooth 314 and the fourth auxiliary cutting tooth 324 have different heights, and the cutting depths of the first main cutting tooth 311, the first auxiliary cutting tooth 321, the second main cutting tooth 312, the second auxiliary cutting tooth 322, the third main cutting tooth 313, the third auxiliary cutting tooth 323, the fourth main cutting tooth 314 and the fourth auxiliary cutting tooth 324 are different. The cutting time of the first main cutting tooth 311, the first auxiliary cutting tooth 321, the second main cutting tooth 312, the second auxiliary cutting tooth 322, the third main cutting tooth 313, the third auxiliary cutting tooth 323, the fourth main cutting tooth 314 and the fourth auxiliary cutting tooth 324 is different, so that the cutting effect is asynchronous. The cutting depth difference X is different according to different stratum requirements, and the range of the cutting depth difference X is preferably 0-2 mm.

As the main cutting teeth bear stronger impact in the cutting process and adopt a large chamfer design, the impact resistance of the cutting teeth is favorably improved, so that the impact resistance of the drill bit is improved, and the service life of the drill bit is prolonged, in combination with fig. 5, the first main cutting teeth 311, the second main cutting teeth 312, the third main cutting teeth 313 and the fourth main cutting teeth 314 adopt a large chamfer design, and the chamfer range is preferably 0-0.70; the first auxiliary cutting tooth 321, the second auxiliary cutting tooth 322, the third auxiliary cutting tooth 323 and the fourth auxiliary cutting tooth 324 are designed to be small in chamfer angle, the aggressiveness of the drill bit is not reduced, and the chamfer angle range is preferably 0-0.35.

In summary, the teeth of the middle blade of the utility model are asynchronous multi-track knots, and the movement tracks of the cutting teeth at different positions are different, which is beneficial to improving the rock breaking efficiency of the drill bit; the chamfer of main cutting tooth is greater than the chamfer of supplementary cutting tooth, because the drill bit main cutting tooth bears stronger impact in cutting process, and main cutting tooth adopts great chamfer, helps promoting cutting tooth shock resistance to promote the shock resistance of drill bit, improve the drill bit life-span, the utility model discloses an optimize wing cloth tooth structure and cutting tooth structure, greatly promoted and visited brill efficiency and drill bit life-span.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a diamond compact piece drill bit, includes drill bit main part, wing, cutting teeth and nozzle, the top circumference of drill bit main part is provided with a plurality of wings, inlay respectively on the wing and be equipped with the cutting teeth, it is adjacent be provided with nozzle, its characterized in that between the wing:

2. The diamond compact drill bit of claim 1, wherein the chamfer of the primary cutter ranges from 0 to 0.70 and the chamfer of the secondary cutter ranges from 0 to 0.35.

3. The diamond compact drill bit of claim 1, wherein the ratio of the blade shoulder maximum height to the bit diameter is greater than 0.25.

4. The diamond compact drill bit of claim 1, wherein the cutting depth of the cutting teeth at different locations is not uniform.

5. The diamond compact drill bit of claim 4, wherein the depth of cut difference of the cutting teeth at different positions ranges from 0mm to 2 mm.

6. The diamond compact bit according to claim 1, wherein the number of the blades is 4, and the teeth of the blades are in an asynchronous multi-track structure, and the blades comprise a first blade, a second blade, a third blade and a fourth blade, and the first blade is provided with a first cutting tooth; a second cutting tooth is arranged on the second blade; a third cutting tooth is arranged on the third blade; a fourth cutting tooth is arranged on the fourth blade;

7. The diamond compact drill bit of claim 1, wherein the cutting teeth are planar diamond compacts.

8. The diamond compact drill bit of claim 1, wherein the cutting teeth are spherical diamond compacts.

9. The diamond compact drill bit of claim 1, wherein the cutting teeth have a diameter in the range of 13mm to 20 mm.

10. The diamond compact drill bit of claim 1, wherein the blades are linear blades or helical blades, and wherein a plurality of the blades are asymmetrically arranged.