| 发明名称 |
IMPROVEMENTS IN OR RELATING TO DRAWWORKS |
| 摘要 |
<p>A drawworks (10) comprising a permanent magnet motor (60) mounted inside a drum(40), said permanent magnet motor arranged to drive said drum via a gear system(50), characterised in that said gear system is located at least partially within said drum.</p> |
| 申请公布号 |
CA2685263(C) |
申请公布日期 |
2013.02.12 |
| 申请号 |
CA20082685263 |
申请日期 |
2008.04.24 |
| 申请人 |
NATIONAL OILWELL VARCO, L.P. |
发明人 |
KVERNELAND, HEGE;KYLLINGSTAD, AGE;MOE, MAGNE MATHIAS;BLOOM, ROBERT LEWIS |
| 分类号 |
B66D1/12;B66D1/22;B66D3/20;B66D5/02;B66D5/14 |
主分类号 |
B66D1/12 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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