- Application Range
It is suitable for drilling water wells,geothermal wells, short mircopiles medium mini-type grouting hole of building, dam and harbour project.
- Design Principles
Make the casing follow easy and the equipment and operation simple
- Outstanding Advantages
Simple structure,simple operation,reliable quality,retrievable drilling tools,long service life.
- Specifications
| A | B | C | D | E | F |
| Outer Dia. of Casing Tube | Inner Dia. of Casing Tube | Reamed Dia. | Min. Inner Dia.of Casing Shoe | Hammer Type | Drill Pipes |
| mm | mm | mm | mm | mm | |
| 108 | 93-99 | 118 | 86 | TDS79 | 76 |
| 114 | 101-103 | 127 | 91 | R56,T38,TDS79 | 76 |
| 127 | 114-116 | 136 | 101 | TDS79 | 76 |
| 140 | 124-127 | 152 | 117 | TDS98 | 76 |
| 146 | 127-132 | 154 | 117 | TDS98 | 76 |
| 168 | 149-155 | 184 | 140 | TDS122 | 76,89 |
| 178 | 159-165 | 194 | 150 | TDS122 | 76,89 |
| 193 | 173-180 | 206 | 166 | TDS139 | 89,114 |
| 219 | 199-206 | 234 | 193 | TDS139,TDS180 | 89,114 |
| 245 | 224-231 | 260 | 210 | TDS180,TDS220 | 114 |
| 273 | 251-257 | 300 | 241 | TDS180 | 114,127 |
