Apparatus for maintaining balanced mud circulation to prevent blowouts,申请号US19650475723-传众专利搜索

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发明名称	Apparatus for maintaining balanced mud circulation to prevent blowouts
摘要
申请公布号	US3338319(A)	申请公布日期	1967.08.29
申请号	US19650475723	申请日期	1965.07.29
申请人	BASS BROTHERS ENTERPRISES, INC.	发明人	III PHIL H. GRIFFIN
分类号	E21B21/08	主分类号	E21B21/08
代理机构		代理人
主权项
地址

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