Ball activated tool for use in downhole drilling,申请号GB20010004380-传众专利搜索

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发明名称	Ball activated tool for use in downhole drilling
摘要
申请公布号	GB0104380(D0)	申请公布日期	2001.04.11
申请号	GB20010004380	申请日期	2001.02.22
申请人	LEE, PAUL B	发明人
分类号	E21B21/00;E21B21/10;E21B34/14	主分类号	E21B21/00
代理机构		代理人
主权项
地址

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