Click image to view full size image
Casing head is like the sub adaptor, it's one end connect with the casing tubes, and another end is connect with drill rods or with other drilling tools during drilling.
Casings Size:
Casings Size:
| Metric Series Casings | ||||
| Size | Outer Diameter | Inner Diameter | ||
| inch | mm | inch | mm | |
| 46 | 44.15 | 37.15 | ||
| 56 | 54.15 | 47.15 | ||
| 66 | 64.25 | 57.25 | ||
| 76 | 74.25 | 67.25 | ||
| 86 | 84.25 | 77.25 | ||
| 101 | 98.00 | 88.30 | ||
| 116 | 113.00 | 103.30 | ||
| 131 | 128.00 | 118.30 | ||
| 146 | 143.00 | 133.30 | ||
| Flush-Jointed W Series Casings | ||||
| BW | 2.874 | 73.0 | 2.374 | 60.3 |
| NW | 3.500 | 88.9 | 3.000 | 76.2 |
| HW | 4.500 | 114.3 | 4.000 | 101.5 |
| PW | 5.500 | 139.7 | 5.000 | 127.0 |
| Flush-Coupled X Series Casings | ||||
| NX | 3.500 | 88.9 | 3.000 | 76.2 |
| HX | 4.500 | 114.3 | 3.937 | 100.0 |
| PX | 5.500 | 139.7 | 4.867 | 123.6 |
| Flush-Jointed Water Well Casings (B.S.879) | ||||
| 4" | 4 1/2" | 114.3 | 3 7/8" | 98.3 |
| 5" | 5 1/2" | 139.7 | 4 7/8" | 123.7 |
| 6" | 6 5/8" | 168.3 | 5 7/8" | 149.3 |
| 8" | 8 5/8" | 193.7 | 7 7/8" | 174.7 |