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发明名称
SYSTEM5 METHOD, AND APPARATUS FOR REDUCING RESIDUAL STRESS IN AS-WELDED ROLLER CONE BIT BALL PLUG WELDS
摘要
申请公布号
EP1904713(B1)
申请公布日期
2009.09.09
申请号
EP20060787231
申请日期
2006.07.14
申请人
BAKER HUGHES INCORPORATED
发明人
ZAHRADNIK, ANTON, F.;JONES, RONNIE, L.;NGUYEN, DON Q.;RICKS, GREGORY L.;BEUERSHAUSEN, CHRISTOPHER C.;SULLIVAN, ERIC C.
分类号
E21B10/08;E21B10/20;E21B10/22
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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