ROTARY DRILLING RIG WITH DIRECT POWER DRIVE AND SIMPLIFIED CONTROLS,申请号GB19680058171-传众专利搜索

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发明名称	ROTARY DRILLING RIG WITH DIRECT POWER DRIVE AND SIMPLIFIED CONTROLS
摘要
申请公布号	GB1246290(A)	申请公布日期	1971.09.15
申请号	GB19680058171	申请日期	1968.12.06
申请人	HUGHES TOOL COMPANY	发明人
分类号	E21B19/08;E21B44/06	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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