发明名称 DRAW-WORKS AND METHOD FOR OPERATING THE SAME
摘要 There is described a draw-works (1) comprising: - a first drum (4) for storing and reeling an elongated hoisting member (10); - a second drum (8) for storing and reeling said elongated hoisting member (10); and - a rotation means (24, 28) for rotating said first drum (4) and said second drum (8); wherein - at least one of said first drum (4) and said second drum (8) is selectively connect-able to and disconnectable from said rotation means (24, 28). There is also described a method for operating a draw-works (1).
申请公布号 CA2922673(A1) 申请公布日期 2016.09.30
申请号 CA20162922673 申请日期 2016.03.03
申请人 NATIONAL OILWELL VARCO NORWAY AS 发明人 SORENSEN, RUNE;WATSON, TIMOTHY;RAJIC, IVAN
分类号 B66D1/26;B66D1/30;E21B19/02 主分类号 B66D1/26
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