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发明名称
COMPRESSIVE SEAL AND PRESSURE CONTROL ARRANGEMENTS FOR DOWNHOLE TOOLS
摘要
申请公布号
GB2233686(A)
申请公布日期
1991.01.16
申请号
GB19900008371
申请日期
1990.04.12
申请人
* COMPUTALOG GEARHART LTD
发明人
DEAN * FOOTE
分类号
E21B4/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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