| 发明名称 |
Roterbar tetning for boreverktöy |
| 摘要 |
The method involves determining a layout of cutter locations in which cutters (20) are positioned upon a bit body (10), and determining wear rate of cutters in cutter locations. Low and high abrasion resistance cutters (20a,20b) are selectively mounted in each cutter location based on determined wear rates. The low abrasion resistance cutters have same impact toughness as the high abrasion resistance cutters. |
| 申请公布号 |
NO20021290(A) |
申请公布日期 |
2002.10.03 |
| 申请号 |
NO20020001290 |
申请日期 |
2002.03.15 |
| 申请人 |
CAMCO INTERNATIONAL (UK) LTD |
发明人 |
GRIFFIN, NIGEL DENNIS;HUGHES, PETER RAYMOND;COLEBROOK, MARK |
| 分类号 |
B22F7/06;B23B27/14;C04B35/52;C04B37/02;C04B41/45;C04B41/53;C04B41/81;C04B41/91;E21B7/06;E21B7/08;E21B7/18;E21B10/00;E21B10/42;E21B10/43;E21B10/50;E21B10/54;E21B10/55;E21B10/56;E21B10/567;E21B10/573;E21B10/60;E21B21/10;F16C33/04 |
主分类号 |
B22F7/06 |
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