MECHANICAL DIRECTIONAL DRILLING JAR,申请号EP19870107591-传众专利搜索

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发明名称	MECHANICAL DIRECTIONAL DRILLING JAR
摘要
申请公布号	EP0248316(B1)	申请公布日期	1990.12.27
申请号	EP19870107591	申请日期	1987.05.25
申请人	DAILEY PETROLEUM SERVICES CORP.	发明人	TENG, CHUAN C.;BLACKLAWS, JOHN E.;CHAPELLE, RENE A.;MCCOMSEY, LEE E.
分类号	E21B7/08;E21B7/04;E21B31/107	主分类号	E21B7/08
代理机构		代理人
主权项
地址

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