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发明名称
Hydraulically actuated fishing tool for reclaiming broken drill parts, etc., from wells
摘要
申请公布号
US2652119(A)
申请公布日期
1953.09.15
申请号
US19490124832
申请日期
1949.11.01
申请人
KNAPP SETH R
发明人
KNAPP SETH R.
分类号
E21B27/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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