发明申请
US20100059286A1 Drill Bit and Cutter Element Having Chisel Crest With Protruding Pilot Portion
有权
钻头和刀具元件具有凿子突起与突出的引导部分
- 专利标题： Drill Bit and Cutter Element Having Chisel Crest With Protruding Pilot Portion
- 专利标题（中）： 钻头和刀具元件具有凿子突起与突出的引导部分
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申请号： US12618997申请日： 2009-11-16
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公开(公告)号： US20100059286A1公开(公告)日： 2010-03-11
- 发明人: Scott D. McDonough , Amardeep Singh
- 申请人： Scott D. McDonough , Amardeep Singh
- 申请人地址： US TX Houston
- 专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人地址： US TX Houston
- 主分类号： E21B10/58
- IPC分类号： E21B10/58 ; E21B10/08 ; E21B10/52
摘要：
A rolling cone drill bit includes a cutter element having a cutting portion with a chisel crest and a pilot portion extending beyond the chisel crest. The pilot portion includes a cutting surface that may be generally conical, or form a second chisel crest. The cutting tip of the pilot portion is supported by buttress portions which emerge from and extend beyond the flanks of the chisel crest to provide additional strength and support for the material of the pilot portion that extends beyond the height of the chisel crest.
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