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发明名称
APPARATUS AND METHOD FOR SEALING DEEP WELLS
摘要
申请公布号
US3428124(A)
申请公布日期
1969.02.18
申请号
USD3428124
申请日期
1967.02.03
申请人
ROBERT ARMSTRONG
发明人
ROBERT ARMSTRONG
分类号
E21B33/127;(IPC1-7):E21B33/12
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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