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发明名称
DRILL BIT BEARING CONTACT PRESSURE REDUCTION
摘要
申请公布号
EP2524103(A2)
申请公布日期
2012.11.21
申请号
EP20110733546
申请日期
2011.02.18
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
SUI, PING, C.;WEAVER, GARY, E.
分类号
E21B10/22;F16C33/76
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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