LARGE BORE HYDRAULIC DRILLING JAR,申请号AU19910086858-传众专利搜索

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发明名称	LARGE BORE HYDRAULIC DRILLING JAR
摘要
申请公布号	AU644485(B2)	申请公布日期	1993.12.09
申请号	AU19910086858	申请日期	1991.10.29
申请人	DAILEY PETROLEUM SERVICES CORP.	发明人	ROBERT W. EVANS
分类号	E21B4/14;E21B31/113;(IPC1-7):E21B31/113	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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