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发明名称
DRAG DRILL BIT WITH DRILLING FLUID NOZZLES
摘要
申请公布号
EP0284238(A3)
申请公布日期
1989.03.08
申请号
EP19880302003
申请日期
1988.03.08
申请人
REED TOOL COMPANY
发明人
DEANE, JOHN D.
分类号
E21B10/42;E21B10/43;E21B10/60;(IPC1-7):E21B10/60;E21B10/56
主分类号
E21B10/42
代理机构
代理人
主权项
地址
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