Apparatus for initiating the drilling of a deviating bore from an existing vertical well bore,申请号US19500180856-传众专利搜索

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发明名称	Apparatus for initiating the drilling of a deviating bore from an existing vertical well bore
摘要
申请公布号	US2621894(A)	申请公布日期	1952.12.16
申请号	US19500180856	申请日期	1950.08.22
申请人	ZUBLIN JOHN A	发明人	ZUBLIN JOHN A.
分类号	E21B7/06;E21B7/08	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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