A drill bit, a seal assembly and a method of sealing,申请号GB20050016356-传众专利搜索

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发明名称	A drill bit, a seal assembly and a method of sealing
摘要
申请公布号	GB2422390(B)	申请公布日期	2007.05.16
申请号	GB20050016356	申请日期	2005.08.09
申请人	SMITH INTERNATIONAL, INC.	发明人	ZHOU YONG;SUDARSANAM CHELLAPPA
分类号	E21B10/22;E21B10/25	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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