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发明名称
DOWNHOLE SWIVEL
摘要
申请公布号
CA2193519(A1)
申请公布日期
1997.09.01
申请号
CA19962193519
申请日期
1996.12.19
申请人
KUDU INDUSTRIES INC.
发明人
MILLS, ROBERT A. R.
分类号
E21B17/10;E21B43/12;(IPC1-7):E21B17/00
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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