Well drilling method,申请号US19620226877-传众专利搜索

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发明名称	Well drilling method
摘要
申请公布号	US3186499(A)	申请公布日期	1965.06.01
申请号	US19620226877	申请日期	1962.09.28
申请人	SHELL OIL COMPANY	发明人	BULLARD BILLY JACK;MALOTT RAYMOND A.
分类号	E21B7/12	主分类号	E21B7/12
代理机构		代理人
主权项
地址

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