Bottom hole control choke,申请号US19370138926-传众专利搜索

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发明名称	Bottom hole control choke
摘要
申请公布号	US2156429(A)	申请公布日期	1939.05.02
申请号	US19370138926	申请日期	1937.04.26
申请人	THE GUIBERSON CORPORATION	发明人	GARRETT HENRY UDELL
分类号	E21B43/12	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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