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经营范围
发明名称
CEMENTING PLUG.
摘要
申请公布号
EP0611412(A4)
申请公布日期
1997.07.16
申请号
EP19920922368
申请日期
1992.10.15
申请人
LAFLEUR PETROLEUM SERVICES, INC.
发明人
LAFLEUR, KARL, K.
分类号
E21B33/16;(IPC1-7):E21B33/16
主分类号
E21B33/16
代理机构
代理人
主权项
地址
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