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发明名称
METHOD FOR PREVENTING CRITICAL ANNULAR PRESSURE BUILDUP
摘要
申请公布号
KR20040012742(A)
申请公布日期
2004.02.11
申请号
KR20037012787
申请日期
2003.09.29
申请人
发明人
分类号
E21B33/035;E21B43/00;E21B17/08;E21B41/00
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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