DU系列转盘卡瓦由DU型、DUL型和SDU型三种形式的转盘卡瓦组成,该卡瓦扣合范围广、重量轻,其中SDU型卡瓦背锥触面大、强度高、耐磨性好,产品按API Spec 7K要求设计、制造。
型号 |
卡瓦体尺寸 |
4-1/2 |
DU |
钻杆直径 |
in |
2-3/8 |
2-7/8 |
3-1/2 |
4 |
4-1/2 |
mm |
60.3 |
73.0 |
88.9 |
101.6 |
114.3 |
DUL |
钻杆直径 |
in |
2-3/8 |
2-7/8 |
3-1/2 |
4 |
4-1/2 |
mm |
60.3 |
73.0 |
88.9 |
101.6 |
114.3 |
SDU |
钻杆直径 |
in |
- |
- |
- |
- |
- |
mm |
- |
- |
- |
- |
- |
型号 |
卡瓦体尺寸 |
5-1/2 |
DU |
钻杆直径 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
DUL |
钻杆直径 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
SDU |
钻杆直径 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
型号 |
卡瓦体尺寸 |
7 |
DU |
钻杆直径 |
in |
4-1/2 |
5 |
5-1/2 |
6-5/8 |
7 |
mm |
114.3 |
127.0 |
139.7 |
168.3 |
177.8 |
DUL |
钻杆直径 |
in |
- |
- |
- |
- |
- |
mm |
- |
- |
- |
- |
- |
SDU |
钻杆直径 |
in |
4-1/2 |
5 |
5-1/2 |
6-5/8 |
7 |
mm |
114.3 |
127.0 |
139.7 |
168.3 |
177.8 | |