DRILLING CHOKE PRESSURE LIMITING CONTROL SYSTEM,申请号GB19860012858-传众专利搜索

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发明名称	DRILLING CHOKE PRESSURE LIMITING CONTROL SYSTEM
摘要
申请公布号	GB2176912(B)	申请公布日期	1989.06.28
申请号	GB19860012858	申请日期	1986.05.27
申请人	* SMITH INTERNATIONAL INCORPORATED	发明人	LAWRENCE E * NEIPLING;MARK CHRISTIAN * FLOHR
分类号	E21B21/08	主分类号	E21B21/08
代理机构		代理人
主权项
地址

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