Large bore hydraulic drilling jar,申请号SG19960003080-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	SG43059(A1)	申请公布日期	1997.10.17
申请号	SG19960003080	申请日期	1996.02.22
申请人	DAILEY PETROLEUM SERVICES CORPORATION	发明人	EVANS, ROBERT, W.
分类号	E21B4/14;E21B31/113;(IPC1-7):E21B	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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