CN215889920U - Deep cobalt-removing self-sharpening PDC drill tooth - Google Patents
Deep cobalt-removing self-sharpening PDC drill tooth Download PDFInfo
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- CN215889920U CN215889920U CN202122078232.7U CN202122078232U CN215889920U CN 215889920 U CN215889920 U CN 215889920U CN 202122078232 U CN202122078232 U CN 202122078232U CN 215889920 U CN215889920 U CN 215889920U
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Abstract
The utility model belongs to the field of superhard materials, and particularly relates to a deep cobalt removal self-sharpening PDC drilling tooth which comprises a substrate, wherein a polycrystalline diamond composite layer is arranged on the substrate, one or more annular grooves are formed in the upper surface of the polycrystalline diamond composite layer, the annular grooves are sequentially distributed from the position close to the edge of polycrystalline diamond to the position close to the center of the polycrystalline diamond composite layer adjacently or at intervals, the substrate and the upper polycrystalline diamond composite layer of the substrate are manufactured through high temperature and high pressure, the annular grooves in the upper surface of a diamond layer are particularly annular V-shaped grooves, the composite layer is subjected to strong acid cobalt removal treatment, and a certain distance is reserved from the deepest part of cobalt removal to the bottom of the V-shaped groove. The drilling tooth provided by the utility model has the characteristics of good self-sharpening property, good high temperature resistance and smooth soil body discharge, is suitable for long-time drilling in complex and high-hardness strata, and has the characteristics of high drilling efficiency, long service life and lower use cost.
Description
Technical Field
The utility model belongs to the field of superhard materials, and particularly relates to a deep cobalt-removing self-sharpening PDC drill tooth.
Background
Among the main tooth materials of the current drill bits for geological drilling, coal fields and oil and gas extraction drilling, PDC drill teeth have good wear resistance, impact resistance and thermal stability, and thus are widely used. In the in-service use process, the PDC drill bit can guarantee long-time work and has better adaptability to various stratums and geological conditions, so that one-time drilling can be realized more easily in a complex stratum environment, the drilling efficiency can be improved, and the time and equipment cost caused by replacement of a drill bit are greatly reduced.
The PDC drilling tooth has the following problems in the practical use process: firstly, with the continuous expansion of the grinding cutting edge, the cutting resistance gradually rises, so that the drilling efficiency is slowed down; secondly, the PDC is heated due to friction in the drilling process, and the metal cobalt element required to be added for synthesis in the PDC is large in expansion coefficient, so that abnormal peeling and damage of a composite layer during PDC diamond are easily caused, and the service life of the PDC is seriously shortened; thirdly, the residues generated in the soil cutting process are limited by the shape of the end face of the PDC and are difficult to discharge, and the abrasion condition of the PDC drilling teeth is further aggravated. Aiming at the problems, a plurality of organizations and manufacturers at home and abroad respectively improve PDC products from different directions, but cannot solve the three problems at one time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a deep cobalt-removing self-sharpening PDC drilling tooth, which aims to solve the problems of low drilling efficiency, short service life and difficult discharge of residues.
The utility model relates to a deep cobalt-removing self-sharpening PDC drill tooth, which adopts the following technical scheme:
the utility model provides a dark cobalt that takes off is from sharp type PDC brill tooth, includes the base member, be equipped with the polycrystalline diamond composite layer on the base member, the polycrystalline diamond composite layer is including taking off cobalt polycrystalline diamond layer, not taking off cobalt polycrystalline diamond layer that distribute from top to bottom, the upper surface of polycrystalline diamond composite layer is equipped with one or more annular groove, and annular groove is by being close to position department at polycrystalline diamond's edge is adjacent in proper order or the interval distribution to the position department of being close to the center of polycrystalline diamond composite layer.
As a modification, the corresponding annular groove is composed of one V-shaped groove and/or more than two adjacent V-shaped grooves.
As an improvement, the included angle between two inclined surfaces of the V-shaped groove is 30-120 degrees.
As an improvement, the distance between the bottoms of two adjacent V-shaped grooves in the corresponding annular grooves is 0.1-4.0 mm.
As an improvement, the opening width of the annular groove is 0.5-1.2 mm.
As an improvement, the groove depth of the annular groove is 0.1-1.0 mm.
As an improvement, the distance between the bottoms of the two annular grooves which are distributed at intervals is 0.1-4.0 mm.
As an improvement, the distance from the bottom of the annular groove to the deepest part of the cobalt removal is 0.1-0.5 mm.
As an improvement, the upper surface and the lower surface of the polycrystalline diamond composite layer are planes parallel to each other.
As an improvement, a chamfer is arranged at the peripheral edge of the upper surface of the polycrystalline diamond composite layer.
The utility model has the beneficial effects that:
the utility model provides a deep cobalt-removing self-sharpening PDC drilling tooth which comprises a substrate, wherein a polycrystalline diamond composite layer is arranged on the substrate, one or more annular grooves are formed in the upper surface of the polycrystalline diamond composite layer, the annular grooves are sequentially distributed from the position close to the edge of polycrystalline diamond to the position close to the center of the polycrystalline diamond composite layer in an adjacent or spaced mode, the annular grooves are V-shaped grooves, cutting edges are increased, conditions are provided for the separation of metal cobalt in deep diamonds, a discharge channel is also provided for cutting residues, the problem of insufficient cutting force in the later period is solved, abnormal collapse and abrasion are greatly avoided, the service life and the working efficiency are prolonged, and the use cost is also reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a three-dimensional schematic view of an embodiment of a deep cobalt-depleted self-sharpening PDC drill bit of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of example 1;
FIG. 3 is a cross-sectional view of an embodiment of example 2;
FIG. 4 is a cross-sectional view of an embodiment of example 3;
FIG. 5 is an enlarged view of a portion of FIG. 2;
FIG. 6 is an enlarged view of a portion of FIG. 3 at B;
FIG. 7 is an enlarged view of a portion of FIG. 4 at C;
reference numerals:
1. the polycrystalline diamond composite layer, 2, the base member, 3, the annular groove, 101, take off cobalt polycrystalline diamond layer, 102, do not take off cobalt polycrystalline diamond layer, the contained angle between two inclined planes of alpha, V-arrangement groove, d, the tank bottom interval of two annular grooves, the opening width of l, annular groove, h, the groove depth of annular groove, h', the bottom distance of annular groove takes off the distance of cobalt deepest place.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms than those herein described and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the utility model and, therefore, the utility model is not to be limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, 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 belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
The utility model relates to an embodiment of a deep cobalt-removing self-sharpening PDC drill bit. As shown in fig. 2 and 5, the deep cobalt-removing self-sharpening PDC drill tooth comprises a substrate 2, wherein a polycrystalline diamond composite layer 1 is arranged on the substrate 2, the polycrystalline diamond composite layer 1 comprises a cobalt-removing polycrystalline diamond layer 101 and a cobalt-removing polycrystalline diamond layer 102 which are distributed from top to bottom, 2 annular grooves 3 are formed in the upper surface of the cobalt-removing polycrystalline diamond layer 101, and the annular grooves 3 are sequentially and adjacently distributed from the position close to the edge of the cobalt-removing polycrystalline diamond to the position close to the center of the polycrystalline diamond layer. The PDC drill tooth in the embodiment is made of hard alloy and an upper polycrystalline diamond composite layer 1 thereof through high temperature and high pressure, wherein the thickness of the composite layer is 3.0 mm.
In this embodiment, the annular groove 3 is specifically a V-shaped groove; the included angle alpha between the two inclined surfaces of the V-shaped groove is 90 degrees; the opening width l of the annular groove 3 is 0.8 mm; the groove depth h of the annular groove 3 is 0.4 mm; the distance d between the bottoms of the two annular grooves 3 which are distributed at intervals is 0.8 mm; the distance h' from the bottom of the annular groove 3 to the deepest part of cobalt removal is 0.3 mm.
The upper surface and the lower surface of the polycrystalline diamond composite layer 1 are planes parallel to each other, and a corner cut is arranged at the peripheral edge of the upper surface of the polycrystalline diamond composite layer 1.
After the drill tooth is worn at the outer edge, a new cutting edge is naturally formed at the inner side of the drill tooth, and meanwhile, the drill tooth is not easily influenced by metal cobalt in cutting due to the fact that the cobalt removal depth of the drill tooth is deep, and the V-shaped groove can provide a smooth discharge channel for residues such as soil scraps and the like, so that abnormal wear of the drill tooth is avoided, and the drill tooth is enabled to obtain good drilling efficiency and low use cost.
Example 2
The utility model relates to an embodiment of a deep cobalt-removing self-sharpening PDC drill bit. As shown in fig. 3 and 6, a deep cobalt-removing self-sharpening PDC drill tooth comprises a substrate 2, wherein a polycrystalline diamond composite layer 1 is arranged on the substrate 2, the polycrystalline diamond composite layer 1 comprises a cobalt-removing polycrystalline diamond layer 101 and a cobalt-removing polycrystalline diamond layer 102 which are distributed up and down, 2 annular grooves 3 are arranged on the upper surface of the polycrystalline diamond composite layer 1, and the annular grooves 3 are sequentially distributed at intervals from the positions close to the edges of polycrystalline diamond to the positions close to the center of the polycrystalline diamond composite layer 1. The PDC drill tooth in the embodiment is made of hard alloy and an upper polycrystalline diamond composite layer 1 thereof through high temperature and high pressure, wherein the thickness of the composite layer is 3.0mm, and the substrate is made of the hard alloy.
In this embodiment, the annular groove 3 is specifically a V-shaped groove; the included angle alpha between the two inclined surfaces of the V-shaped groove is 90 degrees; the opening width l of the annular groove 3 is 0.8 mm; the groove depth h of the annular groove is 0.4 mm; the distance d between the bottoms of the two annular grooves which are distributed at intervals is 0.8 mm; the distance h' from the bottom of the annular groove to the deepest part of the cobalt removal is 0.3 mm.
The upper surface and the lower surface of the polycrystalline diamond composite layer 1 are planes parallel to each other, and a corner cut is arranged at the peripheral edge of the upper surface of the polycrystalline diamond composite layer 1.
Example 3
The utility model relates to an embodiment of a deep cobalt-removing self-sharpening PDC drill bit. As shown in fig. 4 and 7, the deep cobalt-removing self-sharpening PDC drill tooth comprises a substrate 2, wherein a polycrystalline diamond composite layer 1 is arranged on the substrate 2, the polycrystalline diamond composite layer 1 comprises a cobalt-removing polycrystalline diamond layer 101 and a cobalt-removing polycrystalline diamond layer 102 which are distributed from top to bottom, 2 annular grooves 3 are formed in the upper surface of the polycrystalline diamond composite layer 1, and the annular grooves 3 are sequentially distributed at intervals from the positions close to the edges of the polycrystalline diamond to the positions close to the centers of the polycrystalline diamond composite layer 1. The PDC drill tooth in the embodiment is made of hard alloy and an upper polycrystalline diamond composite layer 1 thereof through high temperature and high pressure, wherein the thickness of the composite layer is 3.0 mm.
In this embodiment, the annular groove 3 is specifically two adjacent V-shaped grooves, and the junction of the two V-shaped grooves is lower than the upper surface of the polycrystalline diamond composite layer 1; the included angle alpha between the two inclined surfaces of the V-shaped groove is 90 degrees; the opening width l of the annular groove 3 is 0.8 mm; the groove depth h of the annular groove 3 is 0.4 mm; the distance d between the bottoms of the two annular grooves 3 which are distributed at intervals is 0.8 mm; the distance h' from the bottom of the annular groove to the deepest part of the cobalt removal is 0.3 mm.
The upper surface and the lower surface of the polycrystalline diamond composite layer 1 are planes parallel to each other, and a corner cut is arranged at the peripheral edge of the upper surface of the polycrystalline diamond composite layer 1.
It should be noted that, in other embodiments of the present invention, an included angle between two inclined surfaces of the V-shaped groove is 30 ° or 120 °; the distance between the bottoms of two adjacent V-shaped grooves in the corresponding annular grooves is 0.1 or 4.0 mm; the opening width of the annular groove is 0.5 or 1.2 mm; the groove depth of the annular groove is 0.1 or 1.0 mm; the distance between the bottoms of the two annular grooves which are distributed at intervals is 0.1 or 4.0 mm; the distance from the bottom of the annular groove to the deepest part of the cobalt removal is 0.1 or 0.5 mm; the number of the annular grooves is 1 or 10.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a dark cobalt that takes off is from sharp type PDC brill tooth, includes the base member, be equipped with the polycrystalline diamond composite layer on the base member, its characterized in that, the polycrystalline diamond composite layer is including the cobalt-free polycrystalline diamond layer that takes off who distributes from top to bottom, the upper surface of polycrystalline diamond layer is equipped with one or more annular groove, and annular groove is by being close to position department at polycrystalline diamond's edge is adjacent in proper order or interval distribution to the position department that is close to the center of polycrystalline diamond layer.
2. The deep decobalted self-sharpening PDC drill tooth according to claim 1, wherein the respective annular groove is composed of one V-groove and/or two or more adjacent V-grooves.
3. The deep decobalted self-sharpening PDC drill tooth as claimed in claim 2, wherein the angle between the two inclined surfaces of said V-shaped groove is 30 ° to 120 °.
4. The deep decobalted self-sharpening PDC drill tooth according to claim 2, wherein the groove bottom pitch of two adjacent V-shaped grooves in the respective annular grooves is 0.1 to 4.0 mm.
5. The deep decobalted self-sharpening PDC drill bit as claimed in claim 1, wherein the opening width of said annular groove is 0.5 to 1.2 mm.
6. The deep decobalted self-sharpening PDC drill bit as claimed in claim 1, wherein the annular groove has a groove depth of 0.1 to 1.0 mm.
7. The deep decobalted self-sharpening PDC drill bit as claimed in claim 1, wherein the spacing between the bottoms of the two spaced annular grooves is 0.1 to 4.0 mm.
8. The deep decobalted self-sharpening PDC drill tooth according to claim 1, wherein the bottom of said annular groove is at a distance of 0.1 to 0.5mm from the deepest part of decobalting.
9. The deep decobalted self-sharpening PDC drill bit as claimed in any one of claims 1 to 8, wherein the upper and lower surfaces of the polycrystalline diamond layer are planes parallel to each other.
10. The deep decobalted self-sharpening PDC drill bit as claimed in any one of claims 1 to 8, wherein a chamfer is provided at an outer peripheral edge of an upper surface of the polycrystalline diamond layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122078232.7U CN215889920U (en) | 2021-08-31 | 2021-08-31 | Deep cobalt-removing self-sharpening PDC drill tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122078232.7U CN215889920U (en) | 2021-08-31 | 2021-08-31 | Deep cobalt-removing self-sharpening PDC drill tooth |
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| Publication Number | Publication Date |
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| CN215889920U true CN215889920U (en) | 2022-02-22 |
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|---|---|---|---|
| CN202122078232.7U Active CN215889920U (en) | 2021-08-31 | 2021-08-31 | Deep cobalt-removing self-sharpening PDC drill tooth |
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| CN (1) | CN215889920U (en) |
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- 2021-08-31 CN CN202122078232.7U patent/CN215889920U/en active Active
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