Apparatus for holding rotary drilling power units in a well against rotation,申请号US19300500588-传众专利搜索

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发明名称	Apparatus for holding rotary drilling power units in a well against rotation
摘要
申请公布号	US1870697(A)	申请公布日期	1932.08.09
申请号	US19300500588	申请日期	1930.12.06
申请人	TAYLOR THOMAS G	发明人	TAYLOR THOMAS G.
分类号	E21B4/18	主分类号	E21B4/18
代理机构		代理人
主权项
地址

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