CN2278759Y - 内凹式钻头 - Google Patents
内凹式钻头 Download PDFInfo
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- CN2278759Y CN2278759Y CN 96239503 CN96239503U CN2278759Y CN 2278759 Y CN2278759 Y CN 2278759Y CN 96239503 CN96239503 CN 96239503 CN 96239503 U CN96239503 U CN 96239503U CN 2278759 Y CN2278759 Y CN 2278759Y
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000007747 plating Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims 2
- 239000010432 diamond Substances 0.000 claims 2
- 239000000428 dust Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 238000005245 sintering Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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- Earth Drilling (AREA)
Abstract
本实用新型属于地层钻头,包括钢体1,切削刀2,切削刀2包括中间层3、内外保径层(5,4),内外保径层径向镶焊在中间层3的内外两侧,中间层顶面略凹于内外保径层(5,4)顶面,内凹弧线平滑连续。使用本实用新型,内外保径层耐磨性好,保径性能强,提高钻具稳定性,延长钻头使用寿命。本实用新型主要用于地层钻进。
Description
本实用新型是一种地层钻头，属E21B类。
目前市场上一般使用的钻头，无论是地质钻头或石油钻头，它们均为钢体(胎体)上镶有切削刃，切削刃宽度大于钢体壁厚度。在钢体内外径方向分别突出1.5mm左右，用以扩孔保径，而且切削刃与保径层为同一材料一次成型的块体，为了加强耐磨性，在切削刃内外侧采用电镀工艺镶上金刚石聚晶，增加扩孔保径能力。但在实际应用中，因为切削刃采用同一材料一次成型工艺制成的块体，即使镀有金刚石聚晶，耐磨性仍不尽人意，效果不好，导致卡钻、取芯困难等不利后果，同时切削刃消耗2/5刃高后，因内外层超径，钻头就要报废，增加了使用成本。
本实用新型针对现有技术中存在的问题，提出一种内凹式钻头。
本实用新型由钢体1、切削刃2组成，切削刃2镶焊(镀)在钢体1端部，切削刃2分为中间层3，外保径层4、内保径层5组成，外保径层4和内保径层5分别沿径向镶焊(镀)在中间层3两侧，中间层3顶面略凹于内外保径层(5，4)顶面，内凹弧线平滑连续。
本实用新型中间层3为工作层，厚度和钢体1壁厚度相同，一般为6mm～10mm，采用粉末冶金工艺、电铸工艺一次制作，内保径层5厚度1.2mm～1.8mm，镶焊在中间层3内侧，外保径层4镶焊(镀)在中间层3外侧，厚度0.8～1.2mm，内外保径层(5，4)均采用硬质合金粉末如碳化钨粉末掺有金刚石微粉、立方氮化硼微粉等通过电镀镀覆或喷焊而成。
本实用新型采用中间层3、外保径层4和内保径层5结构，使得内外保径层(5，4)耐磨性、冲击韧性提高，并且中间层略凹于内外保径层(5，4)，在钻进过程中切削刃能始终保持凹形，即内外保径层(5，4)略突出于中间层3，减少钻具在钻进过程中的横向振荡保持钻进稳定性，克服因切削刃消耗出现钻头内外层超径问题，提高钻头扩孔保径能力，延长钻头使用寿命，基本上在中间层3完全消耗完钻头才报废。
图1本实用新型结构示意图
1.钢体，2.切削刃，3.中间层，4.外保径层，5.内保径层
本实用新型以平底式钻头为例，钢体1外径56mm～76mm，内径47mm～68mm，钢体1壁厚7mm～9mm，切削刃高5mm～10mm，中间层3厚度和钢体1壁厚度一致，为7mm～9mm，外保径层4厚度选择1.4mm～1.6mm，内保径层5厚度选择0.9mm～1.1mm，中间层3顶面略凹于内外保径层(5，4)顶面，凹陷中心深度0.1mm～0.4mm，内凹弧线平滑连续，避免中间层3拉槽。
本实用新型主要适用于常规地质钻头，也可用于石油钻头。
Claims (3)
1.一种内凹式钻头，包括钢体(1)，切削刃(2)，切削刃(2)镶焊在钢体(1)端部，其特征在于：切削刃(2)采用层状结构，包括中间层(3)、外保径层(4)内保径层，外保径层(4)和内保径层(5)沿径向固定在中间层(3)的外侧和内侧，中间层(3)略凹于外保径层(4)和内保径层(5)，内凹弧线平滑连续。
2.如权利要求1所述的一种内凹式钻头，其特征在于：中间层(3)厚度和钢体(1)壁厚度相同，为7mm～9mm，外保径层(4厚度1.4mm～1.6mm，内保径层厚度为0.9mm～1.1mm，中间层(3)顶面凹于外保径层(4)和内保径层(5)顶面，凹陷中心深度0.1mm～0.4mm。
3.如权利要求1或2所述的一种内凹式钻头，其特征在于，中间层(3)采用金刚石颗粒制成，外保径层(4)和内保径层(5)采用硬质合金粉末掺有金刚石粉末通过电镀镀覆或喷焊烧结而成。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96239503 CN2278759Y (zh) | 1996-09-01 | 1996-09-01 | 内凹式钻头 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96239503 CN2278759Y (zh) | 1996-09-01 | 1996-09-01 | 内凹式钻头 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2278759Y true CN2278759Y (zh) | 1998-04-15 |
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ID=33914514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96239503 Expired - Fee Related CN2278759Y (zh) | 1996-09-01 | 1996-09-01 | 内凹式钻头 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2278759Y (zh) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890306A (zh) * | 2011-09-16 | 2014-06-25 | 贝克休斯公司 | 用于钻地工具的切削元件、包括这种切削元件的钻地工具及其相关方法 |
| US9428966B2 (en) | 2012-05-01 | 2016-08-30 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
| US9650837B2 (en) | 2011-04-22 | 2017-05-16 | Baker Hughes Incorporated | Multi-chamfer cutting elements having a shaped cutting face and earth-boring tools including such cutting elements |
| US9821437B2 (en) | 2012-05-01 | 2017-11-21 | Baker Hughes Incorporated | Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods |
| US10006253B2 (en) | 2010-04-23 | 2018-06-26 | Baker Hughes Incorporated | Cutting elements for earth-boring tools and earth-boring tools including such cutting elements |
| US10337255B2 (en) | 2011-04-22 | 2019-07-02 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
-
1996
- 1996-09-01 CN CN 96239503 patent/CN2278759Y/zh not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10006253B2 (en) | 2010-04-23 | 2018-06-26 | Baker Hughes Incorporated | Cutting elements for earth-boring tools and earth-boring tools including such cutting elements |
| US9650837B2 (en) | 2011-04-22 | 2017-05-16 | Baker Hughes Incorporated | Multi-chamfer cutting elements having a shaped cutting face and earth-boring tools including such cutting elements |
| US10428591B2 (en) | 2011-04-22 | 2019-10-01 | Baker Hughes Incorporated | Structures for drilling a subterranean formation |
| US10337255B2 (en) | 2011-04-22 | 2019-07-02 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
| US9482057B2 (en) | 2011-09-16 | 2016-11-01 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements and related methods |
| US9617792B2 (en) | 2011-09-16 | 2017-04-11 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements and related methods |
| CN103890306A (zh) * | 2011-09-16 | 2014-06-25 | 贝克休斯公司 | 用于钻地工具的切削元件、包括这种切削元件的钻地工具及其相关方法 |
| US10385623B2 (en) | 2011-09-16 | 2019-08-20 | Baker Hughes, A Ge Company, Llc | Cutting elements for earth-boring tools and earth-boring tools including such cutting elements |
| US10428590B2 (en) | 2011-09-16 | 2019-10-01 | Baker Hughes, A Ge Company, Llc | Cutting elements for earth-boring tools and earth-boring tools including such cutting elements |
| US9376867B2 (en) | 2011-09-16 | 2016-06-28 | Baker Hughes Incorporated | Methods of drilling a subterranean bore hole |
| US9821437B2 (en) | 2012-05-01 | 2017-11-21 | Baker Hughes Incorporated | Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods |
| US10066442B2 (en) | 2012-05-01 | 2018-09-04 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
| US9428966B2 (en) | 2012-05-01 | 2016-08-30 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
| US11229989B2 (en) | 2012-05-01 | 2022-01-25 | Baker Hughes Holdings Llc | Methods of forming cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |