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发明名称
Retrievable well bore drilling apparatus
摘要
申请公布号
US3050143(A)
申请公布日期
1962.08.21
申请号
US19590825118
申请日期
1959.07.06
申请人
ARCHER W. KAMMERER;JEAN K. LAMPHERER;ARCHER W. KAMMERER, JR.
发明人
KAMMERER ARCHER W.;JR. ARCHER W. KAMMERER,;LAMPHERE JEAN K.
分类号
E21B10/34;E21B10/66
主分类号
E21B10/34
代理机构
代理人
主权项
地址
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