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发明名称
Diverter valve
摘要
Diverter valve for preventing blow-outs in oil wells during the early stages of drilling. The diverter valve has a simplified construction which reduces maintenance problems during use in the field.
申请公布号
US4413688(A)
申请公布日期
1983.11.08
申请号
US19810271002
申请日期
1981.06.05
申请人
SEABOURN, JOE M.
发明人
SEABOURN, JOE M.
分类号
E21B21/00;E21B21/08;E21B21/10;(IPC1-7):E21B21/10
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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