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发明名称
Subsurface well tool
摘要
申请公布号
US2683492(A)
申请公布日期
1954.07.13
申请号
US19510246106
申请日期
1951.09.11
申请人
BAKER OIL TOOLS, INC.
发明人
BAKER REUBEN C.
分类号
E21B23/04;E21B23/06;E21B33/129
主分类号
E21B23/04
代理机构
代理人
主权项
地址
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