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经营范围
发明名称
PACKER RETRIEVER
摘要
申请公布号
EP1502001(B1)
申请公布日期
2008.09.17
申请号
EP20030738907
申请日期
2003.05.06
申请人
NATIONAL-OILWELL, L.P.
发明人
STREATER, JAMES, R.
分类号
E21B31/20;E21B29/00
主分类号
E21B31/20
代理机构
代理人
主权项
地址
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