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发明名称
Well apparatus
摘要
申请公布号
GB2173840(A)
申请公布日期
1986.10.22
申请号
GB19850025294
申请日期
1985.10.14
申请人
* NORWARD ENERGY SERVICES LTD
发明人
GEORGE MAXWELL * RAULINS
分类号
E21B33/06;E21B34/04;(IPC1-7):E21B34/04
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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