METHOD AND APPARATUS FOR CENTERING INSTRUMENTS IN WELL,申请号SU19874301712-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR CENTERING INSTRUMENTS IN WELL
摘要
申请公布号	SU1523657(A1)	申请公布日期	1989.11.23
申请号	SU19874301712	申请日期	1987.08.28
申请人	NI PK I GEOFIZICHESKIKH ISSLEDOVANIJ	发明人	RUBAN GEORGIJ N,SU;STRAMOUSOV SERGEJ V,SU
分类号	E21B47/00;E21B47/10	主分类号	E21B47/00
代理机构		代理人
主权项
地址

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