BOTTOM-HOLE CONTROLLER OF DRILLING MUD FLOW RATE,申请号SU19904852803-传众专利搜索

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发明名称	BOTTOM-HOLE CONTROLLER OF DRILLING MUD FLOW RATE
摘要
申请公布号	RU2049907(C1)	申请公布日期	1995.12.10
申请号	SU19904852803	申请日期	1990.07.19
申请人	LAPTEV SERGEJ V;GRABARENKO YURIJ I;GOLUBITSKIJ VALERIJ A	发明人	LAPTEV SERGEJ V;GRABARENKO YURIJ I;GOLUBITSKIJ VALERIJ A
分类号	E21B21/08;(IPC1-7):E21B21/08	主分类号	E21B21/08
代理机构		代理人
主权项
地址

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