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发明名称
Method and apparatus for suppressing drillstring vibrations
摘要
申请公布号
GB9716825(D0)
申请公布日期
1997.10.15
申请号
GB19970016825
申请日期
1997.08.09
申请人
ANADRILL INTERNATIONAL SA
发明人
分类号
E21B17/00;E21B17/07;E21B47/01;F16F15/02
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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