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发明名称
DRILLING APPARATUS
摘要
<p>A drilling apparatus having a novel method and means for assembly and dissasembly of a drill string.</p>
申请公布号
CA1086296(A)
申请公布日期
1980.09.23
申请号
CA19770283420
申请日期
1977.07.25
申请人
JOY MANUFACTURING COMPANY
发明人
BAILEY, EDWARD A.;ORDWAY, JAMES F.
分类号
E21B19/16;(IPC1-7):21B19/00;21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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