Method and apparatus for drilling oil wells,申请号US19640375566-传众专利搜索

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发明名称	Method and apparatus for drilling oil wells
摘要
申请公布号	US3314478(A)	申请公布日期	1967.04.18
申请号	US19640375566	申请日期	1964.06.16
申请人	ERWIN BURNS	发明人	BURNS ERWIN
分类号	E21B43/10	主分类号	E21B43/10
代理机构		代理人
主权项
地址

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