DOWNHOLE TOOL VALVE OPERATED BY PRESSURE DIFFERENCE BETWEEN THE INTERIOR AND EXTERIOR OF ITS HOUSING,申请号AU19860065039-传众专利搜索

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发明名称	DOWNHOLE TOOL VALVE OPERATED BY PRESSURE DIFFERENCE BETWEEN THE INTERIOR AND EXTERIOR OF ITS HOUSING
摘要
申请公布号	AU589231(B2)	申请公布日期	1989.10.05
申请号	AU19860065039	申请日期	1986.11.12
申请人	HALLIBURTON COMPANY	发明人	PAUL DAVID RINGGENBERG
分类号	E21B34/00;E21B34/10;E21B49/00;(IPC1-7):E21B34/06;E21B49/08	主分类号	E21B34/00
代理机构		代理人
主权项
地址

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