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发明名称
METHOD INCLUDING SELECTIVELY RETRIEVING ONE OR MORE OF A PLURALITY OF WELL PACKERS
摘要
申请公布号
GB1542078(A)
申请公布日期
1979.03.14
申请号
GB19760023222
申请日期
1976.06.04
申请人
DRESSER IND INC
发明人
分类号
E21B23/06;E21B33/124;E21B41/00;(IPC1-7):E21B23/00
主分类号
E21B23/06
代理机构
代理人
主权项
地址
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