WELL TOOL WITH SEALING MEANS,申请号GB19910018320-传众专利搜索

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发明名称	WELL TOOL WITH SEALING MEANS
摘要
申请公布号	GB9118320(D0)	申请公布日期	1991.10.09
申请号	GB19910018320	申请日期	1991.08.27
申请人	BAKER HUGHES INC.	发明人
分类号	E21B33/00;E21B33/12;E21B34/14	主分类号	E21B33/00
代理机构		代理人
主权项
地址

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