| A | B | C | ||
| Outer Dia. (mm) | Inner Dia. (mm) | Length (m) | ||
| 108 114 127 146 168 178 183 193 203 219 244 273 323 406 457 508 |
93 101 114 127 149 159 163 173 183 199 224 251 301 382 133 483 |
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 |
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 |
Application Range: It is suitable for drilling water wells, geothermal wells, short miscopies, medium mini-type grouting hole of building, dam and harbor project.
Design Principles: Make the casing follow easy and the equipment and operation simple.
Outstanding Advantages：Simple structure, easy operation, reliable quality, retrievable drilling tools, and long service life.
1、When drilling starts, the reamer opens and enlarges the hole to drive the casing shoe and casing tube down.
2、When the drilling in over-burden formation is finished, reverse the rotation to close the reamer, then the assembly can be pulled up through the casing tube.
3、The casing tube can be left in the hole, or can be pulled out by means of grout sealing material.
4、Use the normal drilling tools to drill and achieve to the desired depth.
