ARRANGEMENT FOR PREVENTING DRILLING MUD LEAKS,申请号SU19864071237-传众专利搜索

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发明名称	ARRANGEMENT FOR PREVENTING DRILLING MUD LEAKS
摘要
申请公布号	SU1337511(A1)	申请公布日期	1987.09.15
申请号	SU19864071237	申请日期	1986.04.22
申请人	KURTOV VENIAMIN D,SU	发明人	KURTOV VENIAMIN D,SU
分类号	E21B34/14	主分类号	E21B34/14
代理机构		代理人
主权项
地址

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