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发明名称
Casingventil
摘要
申请公布号
DE19506794(A1)
申请公布日期
1995.08.31
申请号
DE19951006794
申请日期
1995.02.27
申请人
BAKER HUGHES INC. (N.D.GES.D.STAATES DELAWARE), HOUSTON, TEX., US
发明人
REINHARDT, PAUL A., HOUSTON, TEX., US;MURRAY, DOUGLAS J., HUMBLE, TEX., US
分类号
E21B33/16;E21B34/14;E21B43/11;E21B43/26;(IPC1-7):E21B34/06
主分类号
E21B33/16
代理机构
代理人
主权项
地址
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