Two stage downhole drilling fluid filter,申请号GB20030019896-传众专利搜索

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发明名称	Two stage downhole drilling fluid filter
摘要
申请公布号	GB0319896(D0)	申请公布日期	2003.09.24
申请号	GB20030019896	申请日期	2003.08.26
申请人	SCHLUMBERGER HOLDINGS LIMITED	发明人
分类号	E21B7/04;E21B21/00	主分类号	E21B7/04
代理机构		代理人
主权项
地址

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