发明公开
EP2011893A2 ASYMMETRIC GRADED COMPOSITES FOR IMPROVED DRILL BITS
审中-公开
不对称的平台VerbundwerkstoffefürverbesserteBohrmeißel
- 专利标题： ASYMMETRIC GRADED COMPOSITES FOR IMPROVED DRILL BITS
- 专利标题（中）： 不对称的平台VerbundwerkstoffefürverbesserteBohrmeißel
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申请号： EP08167176.0申请日： 2006-06-30
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公开(公告)号： EP2011893A2公开(公告)日： 2009-01-07
- 发明人: VISWANADHAM, Ramamurthy , LIANG, Dah-Ben , LOCKWOOD, Gregory T.
- 申请人： Smith International, Inc.
- 申请人地址： 16740 Hardy Street Houston, TX 77032 US
- 专利权人： Smith International, Inc.
- 当前专利权人： Smith International, Inc.
- 当前专利权人地址： 16740 Hardy Street Houston, TX 77032 US
- 代理机构： Brochard, Pascale
- 优先权： US696061P 20050701; US478559 20060629
- 主分类号： C23C8/04
- IPC分类号： C23C8/04 ; E21B10/56
摘要：
A cutting tool that includes at least one tungsten carbide cutting element disposed on a support, wherein at least one tungsten carbide cutting element has at least one localized region having a material property different from the remaining region, wherein the at least one localized region having a different material property is prepared by a method including determining at least one localized region needing a variation in a material property different from the remaining region; coating a portion of a surface of the at least one tungsten carbide cutting element with a refractory material such that a surface corresponding to the localized region is left uncoated; and treating the coated cutting element with a selected agent to diffuse the selected agent into the localized region is disclosed.
公开/授权文献
- EP2011893A3 Asymmetric graded composites for improved drill bits 公开/授权日：2014-04-09
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