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发明名称
APPARATUS FOR MEASURING DOWNHOLE DRILLING EFFICIENCY PARAMETERS
摘要
申请公布号
EP1149228(A4)
申请公布日期
2002.08.14
申请号
EP19990969611
申请日期
1999.12.12
申请人
DRESSER INDUSTRIES INC.
发明人
WOLOSON, SCOTT, E.;JONES, DALE, A.
分类号
E21B47/00;E21B47/01;(IPC1-7):E21B47/12;E21B44/00;G01V1/40;G01V3/00
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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