Rotary drill bits including at least one substantially helically extending feature,申请号GB20090006239-传众专利搜索

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发明名称	Rotary drill bits including at least one substantially helically extending feature
摘要
申请公布号	GB2456933(B)	申请公布日期	2009.09.30
申请号	GB20090006239	申请日期	2009.04.09
申请人	BAKER HUGHES INCORPORATED	发明人	VAN J BRACKIN;BRIAN E MILLER;MATHEWS GEORGE
分类号	E21B10/43;E21B10/42	主分类号	E21B10/43
代理机构		代理人
主权项
地址

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