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发明名称
HARDFACING AROUND BALL LOADING HOLE FOR EARTH-BORING BIT
摘要
申请公布号
EP2126272(B1)
申请公布日期
2011.11.23
申请号
EP20080725886
申请日期
2008.02.21
申请人
BAKER HUGHES INCORPORATED
发明人
MASSEY, ALAN, J.;NEHRING, KEITH, L.;LUCE, DAVID, K.
分类号
E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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