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发明名称
Apparatus for drilling with a gaseous drilling fluid
摘要
申请公布号
US3373820(A)
申请公布日期
1968.03.19
申请号
US19660550194
申请日期
1966.05.16
申请人
ESSO PRODUCTION RESEARCH COMPANY
发明人
JR. LEON H. ROBINSON,;FRIEDMAN ROBERT H.;ANNIS MAX R.
分类号
E21B21/16;E21B33/127
主分类号
E21B21/16
代理机构
代理人
主权项
地址
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