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发明名称
Pressure actuated well apparatus
摘要
申请公布号
GB2260150(A)
申请公布日期
1993.04.07
申请号
GB19910021267
申请日期
1991.10.04
申请人
* FMC CORPORATION
发明人
RICHARD * KENT;CHRISTOPHER EDWARD * CUNNINGHAM
分类号
E21B33/043;E21B34/14
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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