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经营范围
发明名称
Drill bit with cutting elements having a nanocrystalline diamond cutting surface
摘要
申请公布号
EP0890705(A3)
申请公布日期
1999.05.06
申请号
EP19980305480
申请日期
1998.07.09
申请人
BAKER HUGHES INCORPORATED
发明人
OVERSTREET, JAMES L.;SCOTT, DANNY E.
分类号
E21B10/56;E21B10/567;(IPC1-7):E21B10/52
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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