Stabilized drag bit,申请号US19620164362-传众专利搜索

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发明名称	Stabilized drag bit
摘要
申请公布号	US3120286(A)	申请公布日期	1964.02.04
申请号	US19620164362	申请日期	1962.01.04
申请人	JERSEY PRODUCTION RESEARCH COMPANY	发明人	BRIDWELL HAROLD C.;ORTLOFF JOHN E.
分类号	E21B10/54	主分类号	E21B10/54
代理机构		代理人
主权项
地址

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