DU型钻杆卡瓦
DU系列转盘卡瓦由DU型、DUL型和SDU型三大种型式的转盘卡瓦组成，该卡瓦的扣合范围广、重量轻，其中SDU型卡瓦被锥接触面大、强度高、耐磨性好。产品按API Spec7K规范要求设计、制造。
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| 型号 Model | 卡瓦体尺寸 Size of Slip bodies | 4% | |||||
| DU | 钻杆直径 DP OD | in | 23/8 | 2% | 3% | 4 | 4% |
| mm | 60.3 | 73.0 | 88.9 | 101.6 | 114.3 | ||
| DUL | 钻杆直径 DP OD | in | 23/8 | 2% | 3% | 4 | 4% |
| mm | 60.3 | 73.0 | 88.9 | 101.6 | 114.3 | ||
| SDU | 钻杆直径 DP OD | in | - | - | - | - | - |
| mm | - | - | - | - | - | ||
| 型号 Model | 卡瓦体尺寸 Size of Slip bodies | 5% | |||||
| DU | 钻杆直径 DP OD | in | 3% | 4 | 4% | 5 | 5% |
| mm | 88.9 | 101.6 | 114.3 | 127 | 139.7 | ||
| DUL | 钻杆直径 DP OD | in | 3% | 4 | 4% | 5 | 5% |
| mm | 88.9 | 101.6 | 114.3 | 127 | 139.7 | ||
| SDU | 钻杆直径 DP OD | in | 3% | 4 | 4% | 5 | 5% |
| mm | 88.9 | 101.6 | 114.3 | 127 | 139.7 | ||
| 型号 Model | 卡瓦体尺寸 Size of Slip bodies | 7% | |||||
| DU | 钻杆直径 DP OD | in | 4% | 5 | 5% | 6% | 7 |
| mm | 114.3 | 127 | 139.7 | 168.3 | 177.8 | ||
| DUL | 钻杆直径 DP OD | in | - | - | - | - | - |
| mm | - | - | - | - | - | ||
| SDU | 钻杆直径 DP OD | in | 4% | 5 | 5% | 6% | 7 |
| mm | 114.3 | 127 | 139.7 | 168.3 | 177.8 | ||
