MUD SHAFT FOR THE DRILL STRING OF A ROTARY PERCUSSIVE DRILLING RIG, IMPACT STACK FOR A MUD SHAFT AND ROTARY PERCUSSIVE DRILLING RIG,申请号EP20070720159-传众专利搜索

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发明名称	MUD SHAFT FOR THE DRILL STRING OF A ROTARY PERCUSSIVE DRILLING RIG, IMPACT STACK FOR A MUD SHAFT AND ROTARY PERCUSSIVE DRILLING RIG
摘要
申请公布号	EP2029851(A1)	申请公布日期	2009.03.04
申请号	EP20070720159	申请日期	2007.05.23
申请人	BTD BOHRTECHNIK AG	发明人	DELL'ANNA, MARCEL
分类号	E21B6/00;E21B4/20	主分类号	E21B6/00
代理机构		代理人
主权项
地址

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