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发明名称
PROCEDE ET DISPOSITIF POUR DETERMINER L'ORIENTATION D'UN INSTRUMENT DE TOPOGRAPHIE DANS UN TROU DE SONDAGE
摘要
申请公布号
FR2549525(B1)
申请公布日期
1987.03.20
申请号
FR19840011248
申请日期
1984.07.16
申请人
NL INDUSTRIES INC
发明人
RICHARD F. ROESLER
分类号
E21B17/16;E21B47/022;(IPC1-7):E21B47/024;G01V3/40;G01V3/18
主分类号
E21B17/16
代理机构
代理人
主权项
地址
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