Apparatus for enlarging well bores,申请号US19540452182-传众专利搜索

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发明名称	Apparatus for enlarging well bores
摘要
申请公布号	US2755071(A)	申请公布日期	1956.07.17
申请号	US19540452182	申请日期	1954.08.25
申请人	ROTARY OIL TOOL COMPANY	发明人	JR. ARCHER W. KAMMERER,
分类号	E21B10/34	主分类号	E21B10/34
代理机构		代理人
主权项
地址

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