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发明名称
DYNAMIC DAMPER FOR USE IN A DRILL STRING
摘要
申请公布号
AU2003234360(A1)
申请公布日期
2004.11.01
申请号
AU20030234360
申请日期
2003.04.14
申请人
HAUGHOM, PER, OLAV
发明人
PER, OLAV HAUGHOM
分类号
E21B17/07;(IPC1-7):E21B17/07
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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