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发明名称
Reservoir sampling
摘要
申请公布号
US2819038(A)
申请公布日期
1958.01.07
申请号
US19550481853
申请日期
1955.01.14
申请人
ESSO RESEARCH AND ENGINEERING COMPANY
发明人
ECKEL JOHN E.
分类号
E21B4/18;E21B21/00;E21B27/00;E21B49/02
主分类号
E21B4/18
代理机构
代理人
主权项
地址
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