- 专利标题: Unplanar non-axisymmetric inserts
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申请号: US09780963申请日: 2001-02-09
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公开(公告)号: US06510910B2公开(公告)日: 2003-01-28
- 发明人: Ronald K. Eyre , Stewart Middlemiss
- 申请人: Ronald K. Eyre , Stewart Middlemiss
- 主分类号: E21B1046
- IPC分类号: E21B1046
摘要:
Cutting elements for incorporation in a drill bit are provided having a body having an end face interfacing with an ultra hard material cutting layer. A main depression having a nonplanar surface is formed on the substrate and extending to the peripheral edge of the substrate subjected to the highest impact loads during drilling. This edge is immediately below the edge of the cutting layer which makes direct contact with the earth formations during drilling. The main depression is formed by forming a plurality of secondary depressions or steps. A second main depression is formed by forming a plurality of secondary depressions or steps. The second main depression also extends to the peripheral edge of the substrate. An ultra hard material layer is bonded to the end face of the cutting element body over the main depressions.
公开/授权文献
- US20020108790A1 Unplanar non-axisymmetric inserts 公开/授权日:2002-08-15
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