HYDRAULIC DRILLING APPARATUS AND METHOD,申请号AR19870307311-传众专利搜索

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发明名称	HYDRAULIC DRILLING APPARATUS AND METHOD
摘要
申请公布号	AR243256(A1)	申请公布日期	1993.07.30
申请号	AR19870307311	申请日期	1987.04.15
申请人	BEN WADE OAKES DICKINSON III Y ROBERT WAYNE DICKINSON	发明人
分类号	E21B7/18;(IPC1-7):E21B7/18	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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