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发明名称
Method of setting and equipping casing in wells and drilling under control
摘要
申请公布号
US2117444(A)
申请公布日期
1938.05.17
申请号
US19340756654
申请日期
1934.12.08
申请人
GRAY TOOL COMPANY
发明人
MUELLER ROBERT A.;YANCEY JOHN R.
分类号
E21B33/04
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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