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经营范围
发明名称
Assembly for latching and sealing about a tubular member
摘要
申请公布号
GB2285105(A)
申请公布日期
1995.06.28
申请号
GB19940023767
申请日期
1994.11.24
申请人
* DOWNHOLE SYSTEMS INC
发明人
ROBERT E * WOMACK
分类号
E21B31/18;E21B33/04;E21B33/05;(IPC1-7):F16L37/092
主分类号
E21B31/18
代理机构
代理人
主权项
地址
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