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发明名称
Fremgangsmåte og innretning for plassering av en sementfôring i et borehull
摘要
申请公布号
NO302136(B1)
申请公布日期
1998.01.26
申请号
NO19890002412
申请日期
1989.06.12
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV
发明人
KLEEF, RUDOLFUS PETRUS ANTONIUS ROBERTUS VAN;LOHBECK, WILHELMUS CHRISTIANUS MARIA
分类号
E21B17/10;E21B33/138;(IPC1-7):E21B33/13
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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