ANNULUS VALVE FOR CONCENTRIC TUBING HANGER,申请号JP19890091685-传众专利搜索

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发明名称	ANNULUS VALVE FOR CONCENTRIC TUBING HANGER
摘要
申请公布号	JPH0227090(A)	申请公布日期	1990.01.29
申请号	JP19890091685	申请日期	1989.04.11
申请人	CAMERON IRON WORKS INC	发明人	RODONII KERETSUTO
分类号	E21B34/02;E21B;E21B33/03;E21B34/10;(IPC1-7):E21B34/02	主分类号	E21B34/02
代理机构		代理人
主权项
地址

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