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发明名称
Two fluid drilling system
摘要
申请公布号
US2951680(A)
申请公布日期
1960.09.06
申请号
US19560620348
申请日期
1956.11.05
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
CAMP JOHN M.;ECKEL JOHN E.;SONS MAX C.
分类号
E21B21/12
主分类号
E21B21/12
代理机构
代理人
主权项
地址
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