CHD Drill Rod with a communication channel is designed for horizontal directional drilling using a telemetry system.
Technical characteristics of CHD Drill Rods
| Name | External diameter of connector D, mm | Internal diameter of connector d, mm | Wall thickness of the pipe t, mm | Length of the thread L1, mm | Length L, mm | Weight, kg | Thread | Make-up torque, Nm | Max. torque, Nm |
|---|---|---|---|---|---|---|---|---|---|
| Drill rod 69.9 | 70.5 | 55.0 | 5.00 | 50.3 | 1500 | 15.10 | CHD | 1200 | 2500 |
| Drill rod 69.9 | 70.5 | 55.0 | 5.00 | 50.3 | 3000 | 27.60 | CHD | 1200 | 2500 |
| Drill rod 73.0 | 73.0 | 56.0 | 5.00 | 50.3 | 1500 | 16.00 | HD | 1200 | 2500 |
| Drill rod 73.0 | 73.0 | 56.0 | 5.00 | 50.3 | 3000 | 32.00 | HD | 1200 | 2500 |
Mechanical properties of rods (min)
| Parameters | Pipe | Connector |
|---|---|---|
| Tensile strength, MPa | 686 | 950 |
| Yield strength, MPa | 490 | 830 |
| Elongation, % | 12 | 10 |
| Hardness HRC | – | 28-34 |