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发明名称
Verrohrungs-Zentrierkorb
摘要
申请公布号
DE69519594(D1)
申请公布日期
2001.01.11
申请号
DE19956019594
申请日期
1995.03.09
申请人
DOWNHOLE PRODUCTS PLC, PORTLETHEN
发明人
KIRK, IAN ALASTAIR;BARRON, WILLIAM;CLARK, ALISTAIR BERTRAM
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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