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发明名称
Active controlled bottomhole pressure system & method
摘要
申请公布号
GB0522209(D0)
申请公布日期
2005.12.07
申请号
GB20050022209
申请日期
2002.09.19
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B4/00;E21B4/02;E21B21/00;E21B21/08
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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