APPARATUS FOR DRILLING OIL WELLS,申请号GB19830023917-传众专利搜索

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发明名称	APPARATUS FOR DRILLING OIL WELLS
摘要
申请公布号	GB2127466(A)	申请公布日期	1984.04.11
申请号	GB19830023917	申请日期	1983.09.07
申请人	* PETROLEUM INSTR TECH SERVICES	发明人	ASADOLLAH * HAYATDAVOUDI
分类号	E21B21/00;(IPC1-7):E21B21/00	主分类号	E21B21/00
代理机构		代理人
主权项
地址

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