发明名称 Method and apparatus for connecting tubulars using a top drive
摘要 An apparatus for facilitating the connection of tubulars, said apparatus comprising a winch, at least one wire line, and a device for gripping the tubular, the arrangement being such that, in use, the winch can be used to winch said at least one wire and said device to position a tubular below said top drive.
申请公布号 US7353880(B2) 申请公布日期 2008.04.08
申请号 US20060560211 申请日期 2006.11.15
申请人 WEATHERFORD/LAMB, INC. 发明人 PIETRAS BERND-GEORG
分类号 E21B19/06;E21B19/16 主分类号 E21B19/06
代理机构 代理人
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