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发明名称
DRUCKBETAETIGTES SICHERHEITSVENTIL FUER BOHRLOCHROHRSTRAENGE
摘要
申请公布号
DE2213098(A1)
申请公布日期
1973.09.20
申请号
DE19722213098
申请日期
1972.03.17
申请人
HYDRIL CO., LOS ANGELES, CALIF. (V.ST.A.)
发明人
MOTT, JAMES DENZIL, HOUSTON, TEX. (V.ST.A.)
分类号
E21B23/02;E21B34/00;E21B34/10;E21B34/14;F16K5/06;F16K17/20;F16K31/528;F16L55/10;(IPC1-7):E21B43/12
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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