CN114508307A - Bionic high-impact-resistance polycrystalline diamond compact - Google Patents
Bionic high-impact-resistance polycrystalline diamond compact Download PDFInfo
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- CN114508307A CN114508307A CN202210139025.4A CN202210139025A CN114508307A CN 114508307 A CN114508307 A CN 114508307A CN 202210139025 A CN202210139025 A CN 202210139025A CN 114508307 A CN114508307 A CN 114508307A
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- polycrystalline diamond
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- diamond compact
- hard alloy
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 76
- 239000010432 diamond Substances 0.000 title claims abstract description 76
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 37
- 239000000956 alloy Substances 0.000 claims abstract description 37
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 230000003592 biomimetic effect Effects 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 9
- 241001275767 Stomatopoda Species 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000013016 damping Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 description 6
- 230000035939 shock Effects 0.000 description 4
- 235000017343 Quebracho blanco Nutrition 0.000 description 2
- 241000065615 Schinopsis balansae Species 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 1
- 241000238424 Crustacea Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 241000251131 Sphyrna Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003313 weakening effect Effects 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
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- 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)
Abstract
The invention discloses a bionic high-impact-resistance polycrystalline diamond compact, which is characterized in that by using a bird tail mantis shrimp foot attachment structure, polycrystalline diamond, hard alloy and alloy steel are sequentially distributed on the working surface of the compact from outside to inside along the radial direction or/and from top to bottom along the axial direction, the hardness of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially reduced, the deformability is sequentially enhanced, and an energy-absorbing and vibration-damping structure is formed; in the process of rock breaking, when the composite sheet is impacted, stress waves generated by the impact are reflected and refracted at the material interface position, so that the stress waves can be effectively weakened and counteracted; for polycrystalline diamond, hard alloy and alloy steel are easier to deform under the impact action, impact energy can be effectively absorbed, polycrystalline diamond is protected, impact damage to a composite sheet is avoided, the impact resistance of the composite sheet is improved, the service life of the composite sheet is prolonged, the overall working performance of a drill bit is greatly improved, and drilling acceleration and synergism are realized.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration drilling tools, in particular to a bionic high-impact-resistance polycrystalline diamond composite sheet imitating a mantis shrimp podophia structure.
Background
The polycrystalline diamond compact is easy to damage due to the fact that impact load of the drill bit is high in the hard formation drilling process of the polycrystalline diamond drill bit, and therefore the service life of the drill bit is short and the drilling efficiency is low. In order to improve the impact resistance of the polycrystalline diamond compact, researchers perform a great deal of optimization and improvement on the structural form of the compact, for example, the form of the working surface of the compact is changed, the thickness of the polycrystalline diamond layer is increased, and the like, but the field application effect is still not ideal.
In nature, the quebracho mantis shrimp is a marine crustacean, has a foot attachment structure similar to a hammerhead, and can be used for impacting prey at a high speed. In order to withstand the impact forces created by accelerations up to 10000G, the quebracho shrimp evolved a special podded structure: the outermost layer is highly crystalline hydroxyapatite, the lower layer is amorphous hydroxyapatite, and the innermost layer is chitin, and the hard and soft structure has extremely high impact resistance.
Receive this inspiration, the bionical research of bird tail mantis shrimp podophia structure of need developing urgently, design a bionical high impact resistance polycrystalline diamond compact, this compact has good shock resistance at broken rock in-process, can improve compact hard stratum working life by a wide margin.
Disclosure of Invention
In view of the above, the technical problems to be solved by the present invention are: the utility model provides a bionical high polycrystalline diamond compact that shocks resistance can improve the broken rock in-process shock resistance of compound piece by a wide margin, extension compound piece working life, improves the efficiency of creeping into of hard rock stratum drill bit.
In order to solve the technical problem, the technical scheme of the invention is as follows: the bionic high-impact-resistance polycrystalline diamond compact is cylindrical, and polycrystalline diamond, hard alloy and alloy steel are sequentially distributed on the working surface of the bionic high-impact-resistance polycrystalline diamond compact along the radial direction from outside to inside or/and along the axial direction from top to bottom, wherein the hardness of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially reduced, and the deformability of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially enhanced.
The following are further optimized designs of the bionic high impact resistance polycrystalline diamond compact of the invention:
wherein, bionical high polycrystalline diamond compact that shocks resistance includes:
the hard alloy base body is a cylindrical body, a circumferential ring groove is formed in the side face of the hard alloy base body, a circumferential boss is arranged above the circumferential ring groove, an annular step is formed between the circumferential boss and the top face of the hard alloy base body, and a central hole extending in the axial direction is formed in the top face of the hard alloy base body;
the steel outer ring is arranged on the circumferential ring groove;
the steel inner core is arranged in the central hole;
a polycrystalline diamond ring composited in the annular step.
Wherein, the steel outer ring, the circumferential boss and the polycrystalline diamond ring are flush in side surface.
The top surfaces of the polycrystalline diamond ring, the hard alloy matrix and the steel inner core are flush.
Wherein, the steel outer ring comprises two steel semi-rings which are buckled with each other.
Wherein, the steel outer ring interference fit in circumference annular.
Wherein, the steel inner core is arranged in the central hole in an interference manner.
Wherein, on the top surface, along the radial direction, the outer diameter of the steel inner core is defined as d1The outer diameter of the top surface of the hard alloy substrate is d2The outer diameter of the polycrystalline diamond ring is d3，d1:d2:d3＝1:2:3。
Wherein, on the side surface and along the axial direction, the thickness of the polycrystalline diamond ring is defined as h1The thickness of the circumferential boss is h2The thickness of the steel outer ring is h3，h1:h2:h3＝1:1:1。
Wherein the thickness of the steel inner core is defined as H, and H is H1+h2+h3。
After the technical scheme is adopted, the invention at least obtains the following beneficial effects:
according to the bionic high-impact-resistance polycrystalline diamond compact, the attachment foot structure of the mantis shrimp at the tail of a bird is used for reference, three different materials, namely polycrystalline diamond, hard alloy and alloy steel are sequentially distributed on the working surface of the compact from outside to inside along the radial direction or/and from top to bottom along the axial direction, the hardness of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially reduced, and the deformation capacity of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially enhanced to form an energy-absorbing and vibration-damping structure; in the process of rock breaking, when the composite sheet is impacted in the radial direction or/and the axial direction, on one hand, stress waves generated by impact are reflected and refracted at the material interface position, and the stress waves can be effectively weakened and counteracted; meanwhile, on the other hand, compared with polycrystalline diamond, the hard alloy and the alloy steel are easier to deform under the impact action, so that impact energy can be effectively absorbed, the polycrystalline diamond is protected, the impact damage of the composite sheet is avoided, the impact resistance of the composite sheet is improved, the service life of the composite sheet is prolonged, the overall working performance of the drill bit is greatly improved, and the drilling speed-up and efficiency improvement are realized.
Drawings
Fig. 1 is a schematic diagram of an explosive structure of a bionic high-impact-resistance polycrystalline diamond compact according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of the composite sheet of FIG. 1;
fig. 3 is a schematic view of the top side structure of the composite sheet of fig. 2;
FIG. 4 is a schematic cross-sectional view of the cemented carbide substrate of FIG. 1;
in the figure: 1. a cemented carbide substrate; 11. a circumferential ring groove; 12. a circumferential boss; 13. an annular step; 14. a central bore; 2. a polycrystalline diamond ring; 3. a steel inner core; 4. a steel semi-ring; d1The outer diameter of the steel inner core; d is a radical of2The outer diameter of the top surface of the hard alloy matrix; d3An outer diameter of the polycrystalline diamond ring; h is1Polycrystalline diamond ring thickness; h is2The thickness of the circumferential boss; h is3The thickness of the steel outer ring; H. and the thickness of the steel inner core.
Detailed Description
The essence of the technical concept of the bionic high-impact-resistance polycrystalline diamond compact is that three different materials, namely polycrystalline diamond, hard alloy and alloy steel, are sequentially distributed on the working surface of a columnar compact from outside to inside along the radial direction or/and from top to bottom along the axial direction by using a bird tail mantis shrimp foot attaching structure, the hardness of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially reduced, and the deformability of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially enhanced to form an energy-absorbing and vibration-damping structure; in the rock breaking process, the polycrystalline diamond is protected, the compact is prevented from being damaged by impact, and the impact resistance of the compact is improved.
The invention is further illustrated in the following non-restrictive description with reference to the figures and examples.
Example one
As shown in fig. 1, 2, and 3, a biomimetic high impact resistant polycrystalline diamond compact according to a first embodiment of the present invention includes: the hard alloy comprises a hard alloy matrix 1, a polycrystalline diamond ring 2, a steel inner core 3 and a steel outer ring which are combined together.
As shown in fig. 4, the cemented carbide base 1 is a cylindrical body, specifically, a cylindrical body, a circumferential annular groove 11 is provided on a side surface of the cemented carbide base 1, a circumferential boss 12 is provided above the circumferential annular groove 11, an annular step 13 is formed between an upper surface of the circumferential boss 12 and a top surface of the cemented carbide base 1, and a central hole 14 extending in an axial direction is provided in a middle portion of the top surface of the cemented carbide base 1.
As shown in fig. 2 and 4, the steel core 3 is disposed in the central bore 14, and the steel core 3 is preferably mounted in the central bore 14 by interference; the polycrystalline diamond ring 2 is composited on the annular step 13 in a manner known in the art; the steel outer loop sets up in circumference annular 11, preferably adopts the interference mode to install the steel outer loop in circumference annular 11, and for the installation of being convenient for, steel outer loop optimal design is the subassembly structure, specifically includes two steel semi-rings 4 of make-up. In addition, the further optimized design is that the steel semi-ring 4, the circumferential boss 12 and the side surface of the polycrystalline diamond ring 2 are flush; the top surfaces of the polycrystalline diamond ring 2, the hard alloy matrix 1 and the steel inner core 3 are flush.
As shown in FIGS. 2 and 3, the composite sheet has a radially inner steel surfaceThe core 3 has an outer diameter d1The external diameter of the top surface of the hard alloy matrix 1 is d2The outer diameter of the polycrystalline diamond ring 2 is d3The optimum design is d1:d2:d31:2: 3. On the side of the compact, along the axial direction, the thickness of the polycrystalline diamond ring 2 is defined as h1The thickness of the circumferential boss 12 of the hard alloy matrix 1 is h2The steel half ring 4 has a thickness h3The thickness of the steel inner core 3 is H, and the optimal design is H1:h2:h3＝1:1:1，H＝h1+h2+h3。
According to the embodiment of the invention, the bionic high-impact-resistance polycrystalline diamond compact uses the foot attachment structure of the mantis shrimp as a reference, three different materials, namely polycrystalline diamond, hard alloy and alloy steel, are sequentially distributed on the working surface of the compact from outside to inside along the radial direction and from top to bottom along the axial direction, the hardness of the polycrystalline diamond, the hard alloy and the alloy steel is sequentially reduced, and the deformability is sequentially enhanced, so that an energy-absorbing and vibration-damping structure is formed; in the process of breaking rock, when the composite sheet is impacted in the radial direction and the axial direction, on one hand, stress waves generated by impact are reflected and refracted at the material interface position, and the stress waves can be effectively weakened and counteracted; meanwhile, on the other hand, compared with polycrystalline diamond, the hard alloy and the alloy steel are easier to deform under the impact action, so that impact energy can be effectively absorbed, the polycrystalline diamond is protected, the impact damage of the composite sheet is avoided, the impact resistance of the composite sheet is improved, the service life of the composite sheet is prolonged, the overall working performance of the drill bit is greatly improved, and the drilling speed-up and efficiency improvement are realized.
Obviously, the technical concept of the present invention is not limited to the above embodiments, and three different materials, i.e., polycrystalline diamond, hard alloy and alloy steel, are sequentially distributed on the working surface of the compact in the radial direction and the axial direction from outside to inside and from top to bottom. Based on the technical idea of the invention, the following embodiments can also be obtained:
example two
Compared with the first embodiment, the second embodiment only distributes three different materials, namely polycrystalline diamond, hard alloy and alloy steel, from outside to inside in the radial direction of the working surface of the composite sheet in sequence, and does not arrange a steel outer ring.
EXAMPLE III
Compared with the first embodiment, the third embodiment sequentially distributes three different materials, namely polycrystalline diamond, hard alloy and alloy steel, from top to bottom only in the axial direction of the working surface of the compact, and does not provide a steel inner core.
Compared with the first embodiment, the second embodiment and the third embodiment, the structure is simpler, the energy absorption and vibration reduction effects are slightly weaker than those of the first embodiment, and the purposes of weakening and counteracting stress waves, absorbing impact energy and protecting polycrystalline diamond can be achieved objectively. As for the specific structures of the second embodiment and the third embodiment, those skilled in the art can design the specific structures according to the technical concepts of the second embodiment and the third embodiment, and therefore, the detailed description and the drawings are omitted.
The foregoing is illustrative of the preferred embodiments of the present invention, and those skilled in the art will recognize that the invention may be practiced without departing from the spirit and scope of the appended claims.
Claims (10)
1. The bionic high-impact-resistance polycrystalline diamond compact is cylindrical and is characterized in that polycrystalline diamond, hard alloy and alloy steel are sequentially distributed on the working surface of the bionic high-impact-resistance polycrystalline diamond compact along the radial direction from outside to inside or/and along the axial direction from top to bottom, the hardness of the polycrystalline diamond and the hardness of the alloy steel are sequentially reduced, and the deformability of the alloy steel is sequentially enhanced.
2. The biomimetic high impact resistant polycrystalline diamond compact of claim 1, wherein the biomimetic high impact resistant polycrystalline diamond compact comprises:
the hard alloy base body is a cylindrical body, a circumferential ring groove is formed in the side face of the hard alloy base body, a circumferential boss is arranged above the circumferential ring groove, an annular step is formed between the circumferential boss and the top face of the hard alloy base body, and a central hole extending in the axial direction is formed in the top face of the hard alloy base body;
the steel outer ring is arranged on the circumferential ring groove;
the steel inner core is arranged in the central hole;
a polycrystalline diamond ring composited in the annular step.
3. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the steel outer ring, the circumferential boss, and the sides of the polycrystalline diamond ring are flush.
4. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the top surfaces of the polycrystalline diamond ring, the cemented carbide substrate, and the steel inner core are flush.
5. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the steel outer ring comprises two steel half rings that are buckled together.
6. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the steel outer ring is interference mounted to the circumferential ring groove.
7. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the steel inner core is interference mounted to the central bore.
8. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the steel inner core has an outer diameter, d, defined on the top surface in a radial direction1The outer diameter of the top surface of the hard alloy substrate is d2The outer diameter of the polycrystalline diamond ring is d3，d1:d2:d3＝1:2:3。
9. The biomimetic high impact resistant polycrystalline diamond compact of claim 2, wherein the thickness of the polycrystalline diamond ring is defined laterally, axially, as h1The thickness of the circumferential boss is h2The thickness of the steel outer ring is h3，h1:h2:h3＝1:1:1。
10. The biomimetic high impact resistant polycrystalline diamond compact of claim 9, wherein the steel inner core is defined to have a thickness H, H ═ H1+h2+h3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210139025.4A CN114508307A (en) | 2022-02-15 | 2022-02-15 | Bionic high-impact-resistance polycrystalline diamond compact |
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| CN202210139025.4A CN114508307A (en) | 2022-02-15 | 2022-02-15 | Bionic high-impact-resistance polycrystalline diamond compact |
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| CN114508307A true CN114508307A (en) | 2022-05-17 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
| CN102414393A (en) * | 2009-06-05 | 2012-04-11 | 维拉国际工业有限公司 | Casing bit and casing reamer designs |
| US20130199693A1 (en) * | 2010-08-24 | 2013-08-08 | Klaus Tank | Wear part |
| CN203614044U (en) * | 2013-12-20 | 2014-05-28 | 江汉石油钻头股份有限公司 | Polycrystalline diamond clad sheet |
| CN104832101A (en) * | 2015-05-15 | 2015-08-12 | 中国水利水电第十工程局有限公司 | Double-base-material type cutting component and down-hole hammer bit with cutting component |
| CN105134086A (en) * | 2015-08-18 | 2015-12-09 | 中国石油大学(华东) | Polycrystalline diamond compact with anti-adhesion characteristic |
| CN107532455A (en) * | 2015-06-24 | 2018-01-02 | 哈利伯顿能源服务公司 | Away drill cuttings and knife combination part |
| WO2018035981A1 (en) * | 2016-08-26 | 2018-03-01 | 聊城市昌润复合材料有限公司 | Polygonal composite sheet matrix comprising diamond |
| CN211173947U (en) * | 2019-08-06 | 2020-08-04 | 中石化江钻石油机械有限公司 | Diamond compact with adjustable tooth exposure height |
| CN214741117U (en) * | 2021-03-02 | 2021-11-16 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact, PDC bearing assembly and cutting tool |
-
2022
- 2022-02-15 CN CN202210139025.4A patent/CN114508307A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
| CN102414393A (en) * | 2009-06-05 | 2012-04-11 | 维拉国际工业有限公司 | Casing bit and casing reamer designs |
| US20130199693A1 (en) * | 2010-08-24 | 2013-08-08 | Klaus Tank | Wear part |
| CN203614044U (en) * | 2013-12-20 | 2014-05-28 | 江汉石油钻头股份有限公司 | Polycrystalline diamond clad sheet |
| CN104832101A (en) * | 2015-05-15 | 2015-08-12 | 中国水利水电第十工程局有限公司 | Double-base-material type cutting component and down-hole hammer bit with cutting component |
| CN107532455A (en) * | 2015-06-24 | 2018-01-02 | 哈利伯顿能源服务公司 | Away drill cuttings and knife combination part |
| CN105134086A (en) * | 2015-08-18 | 2015-12-09 | 中国石油大学(华东) | Polycrystalline diamond compact with anti-adhesion characteristic |
| WO2018035981A1 (en) * | 2016-08-26 | 2018-03-01 | 聊城市昌润复合材料有限公司 | Polygonal composite sheet matrix comprising diamond |
| CN211173947U (en) * | 2019-08-06 | 2020-08-04 | 中石化江钻石油机械有限公司 | Diamond compact with adjustable tooth exposure height |
| CN214741117U (en) * | 2021-03-02 | 2021-11-16 | 广东钜鑫新材料科技股份有限公司 | Polycrystalline diamond compact, PDC bearing assembly and cutting tool |
Non-Patent Citations (3)
| Title |
|---|
| 朱从容等: "数控加工先进刀具材料及其应用", 31 December 2021, 上海交通大学出版社, pages: 8 * |
| 邹德永等: "硬地层PDC钻头切削齿尺寸及后倾角优化设计", 石油钻探技术, vol. 39, no. 6, 30 November 2011 (2011-11-30), pages 91 - 94 * |
| 高科等: "仿生自补偿一体式高胎体孕镶金刚石取心钻头研究", 钻探工程, vol. 49, no. 1, 31 January 2022 (2022-01-31), pages 16 - 24 * |
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