CN201326379Y - Pdc钻头的复合齿 - Google Patents
Pdc钻头的复合齿 Download PDFInfo
- Publication number
- CN201326379Y CN201326379Y CNU2009201056032U CN200920105603U CN201326379Y CN 201326379 Y CN201326379 Y CN 201326379Y CN U2009201056032 U CNU2009201056032 U CN U2009201056032U CN 200920105603 U CN200920105603 U CN 200920105603U CN 201326379 Y CN201326379 Y CN 201326379Y
- Authority
- CN
- China
- Prior art keywords
- impregnated
- pdc
- hard
- cylinder
- pdc sheet
- Prior art date
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- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 30
- 239000010432 diamond Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims description 5
- 230000002093 peripheral Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 238000000227 grinding Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N Tungsten carbide Chemical compound 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[Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 tungsten carbide Chemical class 0.000 description 1
Abstract
本实用新型公开了一种PDC片和镶孕镶块的硬质材料圆柱组成的复合齿，它至少包括厚3－5毫米的PDC片和镶天然和人造金刚石单晶孕镶块或人造金刚石聚晶块的硬质材料圆柱经低温焊接成的复合齿，由于PDC片圆弧顶部后面紧跟着金刚石孕镶块或聚晶块，增加了PDC片圆弧顶部的耐磨性，使复合齿在磨损过程中可以自锐和自磨成类似圆弧的齿形，有利于提高钻速和延长齿的寿命。
Description
PDC钻头的复合齿
技术领域
本实用新型技术涉及一种石油、地质、煤田和矿山等领域钻井用钻头 的PDC片和含孕镶块的硬质材料圆柱组成的复合齿，属于机械制造技术领 域。
背景技术
目前，石油、地质、煤田和矿山等领域使用的PDC钻头通常有不同抛物 线弧形的几个刀片组成，在每个刀片上按一定距离以负前角为10-30°镶焊 不同直径的圆柱硬质合金PDC片齿，齿的长度一般在8-14毫米左右，按钻 头直径大小和PDC片齿的直径不同镶悍约20-50多个齿不等。这些负前角齿 的锋利圆弧部分用来切削岩石，像一个多刃铣刀钻头一样工作。
PDC片齿的磨损首先从圆弧顶部开始，随后就逐渐将圆弧磨平。这时，
齿底和岩石的接触面积大幅度的增加，钻速会不断下降，尤其是磨损性差的 PDC片齿，钻速下降幅度更快。如何减缓PDC片齿圆弧顶部的磨损速度，增 加该部位的耐磨性，并使PDC片齿在磨损过程中保持类似圆弧的形状，以减 少PDC片齿和井底岩石的接触面积，以利于提高钻速，延长钻头的使用寿命， 这是目前国内外各钻头公司急待研究解决的课题。 实用新型内容
本实用新型技术的目的在于针对现有技术不足，提供一种增加PDC片齿 圆弧顶部的耐磨性和它在磨损过程中能自磨成类似圆弧的PDC片和镶孕镶 块的硬质材料圆柱组成的复合齿。该齿由PDC片和镶孕镶块或人造金刚石聚 晶块的硬质材料圆柱经低温焊接复合而成，其中孕镶块的一个侧面贴住PDC 片背面，孕镶块的弧形顶面与PDC片的外围弧形一致并前后排列在齿的侧面 上，孕镶块的其它面被硬质材料圆柱包围。这种复合齿是由厚3-5毫米不同 直径的PDC片通过低温焊接将相同直径的镶孕镶块的长6-12毫米硬质材料 圆柱焊在一起。硬质材料圆柱的孕镶块是由天然金刚石和人造金刚石单晶混 合，经过粉末冶金热压烧结成的，其形状为厚2-8毫米的长方形孕镶块（长 方形长和宽有具体齿的大小来定），也可以用厚2-8毫米的同尺寸的长方形
3人造金刚石聚晶块。长6-12毫米的硬质材料圆柱是通过粉末冶金热压和烧
结法将长方形金刚石孕镶块或人造金刚石聚晶块与硬质材料圆柱基体压制 在一起，经整形加工而成。硬质材料圆柱基体的主要成份为不同比例的碳化
钩、铸造碳化鸨、钴、镍、铁、锰和663青铜粉等金属组成。热压成形后圆 柱体的基体硬度和耐磨性比PDC片齿上的硬质合金要低，具体可根据所钻岩 石的研磨性作适当调整，以保证复合齿能达到自锐和自磨成类似圆弧的效 果。
综上所述，本实用新型技术具有如下优点：
本实用新型提供一种PDC片和镶孕镶块的硬质材料圆柱复合齿，其优点 在于这种圆柱组成的复合齿圆弧顶部由于PDC片圆弧顶部后增加了厚2-8 毫米的长方形天然金刚石单晶热压孕镶块或人造金刚石聚晶块，从而加强了 PDC片圆弧顶部的耐磨性，同时PDC片顶部圆弧二侧后面没有孕镶块和聚晶 块，所以二侧复合片磨损得快，使复合齿圆弧顶部自磨成类似于圆弧的齿形， 可以减少复合齿和井底岩石的接触面积，有利于提高钻速和延长钻头寿命。
本实用新型技术提供一种PDC片和镶孕镶块的硬质材料圆柱组成的复 合齿，其优点在于这种复合齿的制造工艺比较简单，将PDC片和镶孕镶块或 人造金刚石聚晶块的硬质材料圆柱用低温焊接在一起，硬质材料圆柱基体性 能和金刚石孕镶块或聚晶块的尺寸可以根据钻头上复合齿大小和岩石研磨 性的高低随时调整，以达到最佳效果。
附图说明
图1为PDC片和镶金刚石孕镶块或人造金刚石聚晶块的硬质材料圆柱复合 齿结构示意图。
图2为长方形金刚石孕镶块或人造金刚石聚晶块的外形示意图。
图3为PDC片和镶孕镶块或人造金刚石聚晶块的硬质材料圆柱组成的复合
齿磨损后切削齿和岩石的接触面积示意图。
图4为普通PDC齿磨损后切削齿和岩石的接触面积示意图。
具体实施方式
下面结合附图和实施例对本实用新型做进一步地详细说明。如图1所示为本实用新型的PDC片和镶金刚石孕镶块或镶人造金刚石 聚晶块的硬质材料圆柱组成的复合齿结构示意图。它由PDC片1、金刚石孕
镶块或人造金刚石聚晶块2和硬质材料圆柱3组成。如图2所小中金刚石孕 镶块是有天然和人造金刚石混合经热压成，厚2-8毫米的长方形孕镶块或人 造金刚石聚晶块的其它尺寸根据钻头要求复合齿的尺寸来定，硬质材料圆柱 3将压好的金刚石孕镶块或人造金刚石聚晶块2加上不同金属粉末再用热压 或烧结法制成镶金刚石孕镶块或人造金刚石聚晶块的硬质材料圆柱体，然后 将制造好的硬质材料圆柱体3，经整形后，用低温焊接法与PDC片-1悍在一
起，组成圆柱复合齿，能起到加强复合齿圆弧顶部耐磨的作用，使齿具有自 锐和自磨成类似圆弧的外形，以减少在磨损过程中齿与岩石的接触面积，如 图3和图4所示，有利于提高钻速和延长钻头寿命的作用。
最后应说明的是，以上实施例仅用以说明本实用新型的技术方案而非 限制，尽管参照较佳实施例对本实用新型进行了详细说明，本领域的普通技 术人员应当理解，可以对本实用新型的技术方案进行修改或者等同替换，而 不脱离本实用新型技术方案的精神和范围，其均应涵盖在本实用新型的权力 要求范围当中。
Claims (2)
1.一种PDC钻头复合齿，其特征在于该齿由PDC片和镶孕镶块或人造金刚石聚晶块的硬质材料圆柱经低温焊接复合而成，其中孕镶块的一个侧面贴住PDC片背面，孕镶块的弧形顶面与PDC片的外围弧形一致并前后排列在齿的侧面上，孕镶块的其它面被硬质材料圆柱包围。
2. 根据权利要求1所述的PDC钻头复合齿，其特征在于，PDC片的 厚度为3-5毫米，孕镶块的厚度为2-8毫米。
Priority Applications (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128008A (zh) * | 2011-03-24 | 2011-07-20 | 中南大学 | 聚晶金刚石-硬质合金复合碎岩球齿潜孔钻头及其制造工艺 |
| CN102303192A (zh) * | 2011-05-06 | 2012-01-04 | 成都比拓超硬材料有限公司 | 提高多晶金刚石复合片钻齿/刀齿适用性的方法 |
| US8590646B2 (en) | 2009-09-22 | 2013-11-26 | Longyear Tm, Inc. | Impregnated cutting elements with large abrasive cutting media and methods of making and using the same |
| CN105863518A (zh) * | 2016-05-24 | 2016-08-17 | 西南石油大学 | 一种具有pdc组合齿的复合钻头 |
| CN110052612A (zh) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | 孕镶金刚石复合块 |
| US10702975B2 (en) | 2015-01-12 | 2020-07-07 | Longyear Tm, Inc. | Drilling tools having matrices with carbide-forming alloys, and methods of making and using same |
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2009
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8590646B2 (en) | 2009-09-22 | 2013-11-26 | Longyear Tm, Inc. | Impregnated cutting elements with large abrasive cutting media and methods of making and using the same |
| CN102128008A (zh) * | 2011-03-24 | 2011-07-20 | 中南大学 | 聚晶金刚石-硬质合金复合碎岩球齿潜孔钻头及其制造工艺 |
| CN102303192A (zh) * | 2011-05-06 | 2012-01-04 | 成都比拓超硬材料有限公司 | 提高多晶金刚石复合片钻齿/刀齿适用性的方法 |
| US10702975B2 (en) | 2015-01-12 | 2020-07-07 | Longyear Tm, Inc. | Drilling tools having matrices with carbide-forming alloys, and methods of making and using same |
| CN105863518A (zh) * | 2016-05-24 | 2016-08-17 | 西南石油大学 | 一种具有pdc组合齿的复合钻头 |
| CN105863518B (zh) * | 2016-05-24 | 2019-03-29 | 西南石油大学 | 一种具有pdc组合齿的复合钻头 |
| CN110052612A (zh) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | 孕镶金刚石复合块 |
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