CN111577147A - Impregnated diamond drill bit for inhibiting core caking - Google Patents
Impregnated diamond drill bit for inhibiting core caking Download PDFInfo
- Publication number
- CN111577147A CN111577147A CN202010410187.8A CN202010410187A CN111577147A CN 111577147 A CN111577147 A CN 111577147A CN 202010410187 A CN202010410187 A CN 202010410187A CN 111577147 A CN111577147 A CN 111577147A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- core
- diamond
- impregnated
- inner cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 14
- 229910003460 diamond Inorganic materials 0.000 title claims description 28
- 239000010432 diamond Substances 0.000 title claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 230000036346 tooth eruption Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000001629 suppression Effects 0.000 claims 3
- 238000010276 construction Methods 0.000 claims 1
- 238000005470 impregnation Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 14
- 238000005553 drilling Methods 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention belongs to the technical field of rock mass engineering, and discloses an inner cone diamond-impregnated bit for inhibiting core caking, which comprises: a drill steel body and a drill matrix; the drill bit matrix includes: a plurality of cutting teeth circumferentially fixed to the bit steel body; a drainage gap is arranged between the adjacent cutting teeth; an inclined surface is arranged between the inner side surface and the top end surface of the cutting tooth, and the inclined surface inclines from the radial direction of the cutting tooth top end to the inner side. The drill bit provided by the invention can fully control the formation of the core cake in the drilling process.
Description
Technical Field
The invention relates to the technical field of rock mass engineering, in particular to an inner cone diamond-impregnated drill bit for inhibiting core caking.
Background
Because deep rock mass engineering buries deeply greatly, and ground stress is high, often has the rock core to be the emergence of pie phenomenon when drilling through diamond bit for rock core drilling, causes very big difficulty for ground stress measurement work, leads to often that ground stress test result is inaccurate or even can't successfully test.
Disclosure of Invention
The invention provides an inner cone impregnated diamond bit for inhibiting core caking, which solves the technical problem that a core is caked when a diamond bit for core drilling drills in the prior art.
In order to solve the above technical problems, the present invention provides an inner cone diamond-impregnated drill bit for suppressing core caking, comprising: a drill steel body and a drill matrix;
the drill bit matrix includes: a plurality of cutting teeth circumferentially fixed to the bit steel body;
a drainage gap is arranged between the adjacent cutting teeth;
an inclined surface is arranged between the inner side surface and the top end surface of the cutting tooth, and the inclined surface inclines from the radial direction of the cutting tooth top end to the inner side.
Further, the number of the cutting teeth is 14.
Further, the inclination angle of the inclined surface is 30 degrees.
Further, the top end surface of the cutting tooth is a convex arc surface.
Further, the width of the drainage gap is 4 mm.
Furthermore, a boss is arranged on the drill bit steel body, and the drill bit matrix is fixed on the boss.
Further, the drill bit matrix is formed on the boss through an embedding process.
Further, the drill steel body is of a hollow structure.
Further, the boss is located at the upper end of the drill steel body.
Furthermore, the drill steel body is provided with threads.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the inner cone impregnated diamond drill bit of inhibition core cake that provides in the embodiment of this application adopts the inner cone lip face impregnated diamond drill bit, definitely says so, sets the cutting teeth of drill bit matrix to the interior survey inclined plane for increase the area of contact of tooth and rock, can guarantee to creep into the stress value that the in-process produced in the rock mass is less, is difficult for making the core surface produce the core fracture that arouses because of stress concentration, thereby alleviates the production of cake phenomenon. Meanwhile, the drilling efficiency of the diamond bit is improved by optimizing other parameters of the diamond bit.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a top view of an inner cone diamond impregnated drill bit that inhibits core balling;
FIG. 2 is a schematic cross-sectional view of a cutting tooth of an inner cone diamond-impregnated drill bit that inhibits core caking;
FIG. 3 is a schematic structural view of a bit steel body of an inner cone diamond-impregnated bit for inhibiting core balling;
description of reference numerals: 1-bit steel body, 11-outer boss, 12-inner boss, 2-bit matrix, 21-cutting teeth, 22-drainage gap and 3-thread.
Detailed Description
The embodiment of the application provides an inner cone impregnated diamond bit for inhibiting core caking, and solves the technical problem that a core is caky when the diamond bit for core drilling creeps into in the prior art.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
In the prior art, the lip surface shape of the diamond drill bit for core drilling generally takes a flat-bottom type and a step type as main parts, but the flat-bottom type diamond drill bit and the step type diamond drill bit have larger stress ratio to the inner part of a rock, and the lip surface has a stress concentration phenomenon, so that a core is easily damaged during drilling, cracks are easily generated at the core, and conditions are provided for the cake formation of the core. The embodiment provides a design of a special-shaped lip surface structure, and the lip surface shape of a diamond bit is designed according to different use requirements and working stratums so as to replace the traditional lip surface shape.
Referring to fig. 1, 2 and 3, an inner cone diamond impregnated drill bit for inhibiting core balling comprises: a drill steel body 1 and a drill matrix 2; the bit matrix 2 includes: a plurality of cutting teeth 21 fixed to the bit steel body 1 in the circumferential direction; a drainage gap 22 is provided between adjacent cutting teeth 21.
It is worth noting that an inclined surface is arranged between the inner side surface and the top end surface of the cutting tooth 21, and the inclined surface is inclined towards the inner side from the top end of the cutting tooth 21 in the radial direction, so that a special-shaped lip surface structure is formed, the contact area between the tooth and a rock is increased, the stress value generated in the rock body in the drilling process is small, the rock core is not prone to cracking caused by stress concentration on the surface of the rock core, and the occurrence of a cake phenomenon is reduced.
In this embodiment, the number of the cutting teeth 21 is 14, the inclination angle of the inclined surface is 30 degrees, the tip end surface of the cutting tooth 21 is a convex arc surface, and the width of the drainage gap 22 is 4 mm.
Furthermore, a boss is arranged on the drill bit steel body 1, and the drill bit matrix 2 is fixed on the boss; the drill bit matrix 2 is molded on the boss through an embedding process; the drill bit steel body is of a hollow structure, and the boss is located at the upper end of the drill bit steel body 1 and is divided into an inner boss 12 and an outer boss 11.
In order to facilitate connecting the connecting rod, the drill steel body 1 is provided with threads 3.
In this embodiment, contrast ordinary rectangle lip face or other toper lip faces, the stress at the core department is less when interior toper lip face drill bit drills into, thereby can avoid core department to produce the crackle and form the core pie, and the toper lip face has improved the footage speed, can reduce the moment of torsion fluctuation of drill bit, has improved drilling efficiency, reduces the energy consumption.
The basic composition of the diamond bit matrix is still tungsten carbide base, and the diamond bit matrix has the advantages of high hardness, strong wear resistance, small heat damage to diamond and easy oxidation. Iron-based powder can be added in the matrix formula, so that the sintering temperature can be reduced, the original strength of the diamond is kept, the iron-based resources are rich, the matrix strength can be enhanced, and the service life of the drill bit is prolonged.
The graphite mould material of the hot pressing process adopts high-purity graphite material and artificial compact graphite, has high compressive strength, can not deform and adhere, is easy to process and can be used for multiple times
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the inner cone impregnated diamond drill bit of inhibition core cake that provides in the embodiment of this application adopts the inner cone lip face impregnated diamond drill bit, definitely says so, sets the cutting teeth of drill bit matrix to the interior survey inclined plane for increase the area of contact of tooth and rock, can guarantee to creep into the stress value that the in-process produced in the rock mass is less, is difficult for making the core surface produce the core fracture that arouses because of stress concentration, thereby alleviates the production of cake phenomenon. Meanwhile, the drilling efficiency of the diamond bit is improved by optimizing other parameters of the diamond bit.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. An inner cone diamond impregnated drill bit for inhibiting core balling, comprising: a drill steel body and a drill matrix;
the drill bit matrix includes: a plurality of cutting teeth circumferentially fixed to the bit steel body;
a drainage gap is arranged between the adjacent cutting teeth;
an inclined surface is arranged between the inner side surface and the top end surface of the cutting tooth, and the inclined surface inclines from the radial direction of the cutting tooth top end to the inner side.
2. The core-pie suppression inner cone diamond-impregnated drill bit according to claim 1, wherein the number of cutting teeth is 14.
3. The inner cone impregnated diamond drill bit for inhibiting core caking as claimed in claim 1 wherein the inclination angle of the inclined face is 30 degrees.
4. The inner cone diamond-impregnated drill bit that inhibits core-balling according to claim 1, wherein the tip face of the cutting tooth is convexly curved.
5. The inner cone impregnated diamond drill bit for inhibiting core caking as claimed in claim 1 wherein the width of the drainage gap is 4 mm.
6. The inner cone diamond-impregnated drill bit for inhibiting core caking as claimed in claim 1 wherein the drill steel body is provided with a boss on which the drill bit matrix is fixed.
7. The core-pie suppression inner cone diamond-impregnated drill bit according to claim 6, wherein the bit matrix is formed on the boss by an impregnation process.
8. The inner cone diamond-impregnated drill bit for inhibiting core caking as claimed in claim 7 wherein the drill steel body is of hollow construction.
9. The core-pie suppression inner cone diamond-impregnated drill bit according to claim 8, wherein the boss is located at the upper end of the bit steel body.
10. The inner cone diamond-impregnated drill bit for inhibiting core caking as claimed in claim 8 wherein the drill bit steel body is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410187.8A CN111577147A (en) | 2020-05-15 | 2020-05-15 | Impregnated diamond drill bit for inhibiting core caking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410187.8A CN111577147A (en) | 2020-05-15 | 2020-05-15 | Impregnated diamond drill bit for inhibiting core caking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111577147A true CN111577147A (en) | 2020-08-25 |
Family
ID=72125050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010410187.8A Pending CN111577147A (en) | 2020-05-15 | 2020-05-15 | Impregnated diamond drill bit for inhibiting core caking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111577147A (en) |
-
2020
- 2020-05-15 CN CN202010410187.8A patent/CN111577147A/en active Pending
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