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发明名称
DRILLING KICK-OFF DEVICE WITH OPEN-ENDED TUBE ATTACHABLE AT UPPER END TO CASING STRING AND WITH LOWER GUIDEWAYS
摘要
申请公布号
NZ266457(A)
申请公布日期
1997.02.24
申请号
NZ19940266457
申请日期
1994.04.29
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV
发明人
KONOPCZYNSKI, MICHAEL ROBERT
分类号
E21B7/06;E21B7/08;(IPC1-7):E21B7/06
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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