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发明名称
Apparatus for centering well tools in a well bore
摘要
申请公布号
US3087552(A)
申请公布日期
1963.04.30
申请号
US19610142086
申请日期
1961.10.02
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
GRAHAM JOHN W.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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