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发明名称
Disengageable latch means for dual string packers
摘要
申请公布号
US3229997(A)
申请公布日期
1966.01.18
申请号
US19620207688
申请日期
1962.07.05
申请人
DRESSER INDUSTRIES, INC.
发明人
SIMPSON HARRY E.;CROW MORGAN L.
分类号
E21B33/122
主分类号
E21B33/122
代理机构
代理人
主权项
地址
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