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发明名称
Annulus pressure responsive downhole tool.
摘要
申请公布号
EP0539020(B1)
申请公布日期
1995.11.22
申请号
EP19920308552
申请日期
1992.09.18
申请人
HALLIBURTON COMPANY
发明人
MANKE, KEVIN R.;RINGGENBERG, PAUL D.;SCHULTZ, ROGER L.
分类号
E21B34/00;E21B23/00;E21B34/10;E21B49/08;(IPC1-7):E21B34/10
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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