发明名称 Apparatus and method for facilitating the connection of tubulars using a top drive
摘要 An apparatus for facilitating the connection of tubulars using a top drive, the apparatus comprising a supporting member (13) for connection with said top drive, a tool (30) for gripping a tubular and means for allowing substantially horizontal movement therebetween, wherein said means comprises a flexible membrane (18) enclosing a fluid.
申请公布号 US6725938(B1) 申请公布日期 2004.04.27
申请号 US20010868790 申请日期 2001.09.04
申请人 WEATHERFORD/LAMB, INC. 发明人 PIETRAS BERND-GEORG
分类号 E21B19/16;E21B21/10;(IPC1-7):E21B19/16 主分类号 E21B19/16
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