Assembly and floatation method for drilling drivepipe,申请号GB20010000338-传众专利搜索

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发明名称	Assembly and floatation method for drilling drivepipe
摘要
申请公布号	GB2358036(B)	申请公布日期	2002.12.11
申请号	GB20010000338	申请日期	2001.01.08
申请人	BILLY JAMES * ROBERTS;WILLIAM HAROLD * STRONG;* SMITH INTERNATIONAL, INC.	发明人	BILLY JAMES * ROBERTS;WILLIAM HAROLD * STRONG
分类号	E21B4/20;E21B7/124;E21B7/20;E21B19/00;(IPC1-7):E21B19/00	主分类号	E21B4/20
代理机构		代理人
主权项
地址

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