发明授权
- 专利标题： Drill bit with replaceable blade members
- 专利标题（中）： 钻头可更换刀片
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申请号： US12456234申请日： 2009-06-11
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公开(公告)号： US08272458B2公开(公告)日： 2012-09-25
- 发明人: Alan L. Nackerud
- 申请人： Alan L. Nackerud
- 主分类号： E21B10/42
- IPC分类号： E21B10/42 ; E21B10/627
摘要：
A drill bit for rotary drilling a well bore of a subterranean formation which has replaceable blades which overlap and interlock with each other and have retention means on more than one axis. The replaceable blades may have cutters with enhanced retention by brazing ring grooves and the body may be flared at its bottom to better retain the blades and cutters.
公开/授权文献
- US20090308664A1 Drill bit with replaceable blade members 公开/授权日：2009-12-17
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