DU系列轉盤卡瓦由DU型、DUL型和SDU型三種形式的轉盤卡瓦組成,該卡瓦扣合范圍廣、重量輕,其中SDU型卡瓦背錐觸面大、強度高、耐磨性好,產品按API Spec 7K要求設計、制造。
型號 |
卡瓦體尺寸 |
4-1/2 |
DU |
鉆桿直徑 |
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 |
鉆桿直徑 |
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 |
鉆桿直徑 |
in |
- |
- |
- |
- |
- |
mm |
- |
- |
- |
- |
- |
型號 |
卡瓦體尺寸 |
5-1/2 |
DU |
鉆桿直徑 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
DUL |
鉆桿直徑 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
SDU |
鉆桿直徑 |
in |
3-1/2 |
4 |
4-1/2 |
5 |
5-1/2 |
mm |
88.9 |
101.6 |
114.3 |
127.0 |
139.7 |
型號 |
卡瓦體尺寸 |
7 |
DU |
鉆桿直徑 |
in |
4-1/2 |
5 |
5-1/2 |
6-5/8 |
7 |
mm |
114.3 |
127.0 |
139.7 |
168.3 |
177.8 |
DUL |
鉆桿直徑 |
in |
- |
- |
- |
- |
- |
mm |
- |
- |
- |
- |
- |
SDU |
鉆桿直徑 |
in |
4-1/2 |
5 |
5-1/2 |
6-5/8 |
7 |
mm |
114.3 |
127.0 |
139.7 |
168.3 |
177.8 | |