FLOW PULSING APPARATUS FOR DOWN-HOLE DRILLING EQUIPMENT,申请号GB19880006465-传众专利搜索

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发明名称	FLOW PULSING APPARATUS FOR DOWN-HOLE DRILLING EQUIPMENT
摘要
申请公布号	GB8806465(D0)	申请公布日期	1988.04.20
申请号	GB19880006465	申请日期	1988.03.18
申请人	INTECH OIL TOOLS LTD	发明人
分类号	E21B4/14;E21B7/18;E21B7/24;E21B21/00	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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