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发明名称
Improvements in or relating to oilfield tubular shear ram and method for blowout prevention
摘要
申请公布号
GB9424668(D0)
申请公布日期
1995.02.01
申请号
GB19940024668
申请日期
1994.12.07
申请人
VARCO SHAFFER INC
发明人
分类号
E21B29/08;E21B33/06
主分类号
E21B29/08
代理机构
代理人
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