UC-3型套管卡瓦
7-133/8U-3套管卡瓦按API Spec7K及SY5049-91(钻杆卡瓦)设计制造，为多片体结构，能适应套管磨损后外径尺寸的变化，具有重量轻、卡持范围大、牢固等优点。
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技术参数
适用管径 Casing O.D. | 卡瓦体规格 specification of body | 卡瓦体总页数 Total Number of segments | 牙板数 Total Number of Insert | 锥度 Taper | |
| in | mm | 85/8 | 10 | 10 | 1:3 |
| 7 | 177.8 | ||||
| 75/8 | 193.7 | ||||
| 85/8 | 219.1 | ||||
| 9 | 228.6 | 103/4 | 10 | 10 | 1:4 |
| 95/8 | 244.5 | ||||
| 103/4 | 273.1 | ||||
| 113/4 | 298.5 | 133/8 | 12 | 12 | 1:4 |
| 123/4 | 323.9 | ||||
| 133/8 | 339.7 | ||||
| 16 | 406.4 | 133/8 | 14 | 14 | 1:4 |
| 185/8 | 473.1 | 17 | 17 | ||
| 20 | 508 | 17 | 17 | ||
| 221/2 | 571.5 | 19 | 19 | ||
| 24 | 609.6 | 19 | 19 | ||
| 26 | 660.4 | 21 | 21 | ||
| 30 | 762 | 24 | 24 | ||
| 36 | 914.4 | 28 | 28 | ||
| 42 | 1066.8 | 32 | 32 | ||
