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经营范围
发明名称
Akustischer Wandler für ein Bohrloch.
摘要
申请公布号
DE69112992(T2)
申请公布日期
1996.05.15
申请号
DE19916012992T
申请日期
1991.10.31
申请人
SCHLUMBERGER TECHNOLOGY B.V., DEN HAAG/'S-GRAVENHAGE, NL
发明人
OUNADJELA, ABDERRHAMANE, F-75014 PARIS, FR
分类号
E21B47/12;G01V1/02;G01V1/145;G10K9/12;H04R17/00;(IPC1-7):G01V1/145
主分类号
E21B47/12
代理机构
代理人
主权项
地址
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