Product info
Horizontal system for down the hole hammer
The loads in Horizontal Drilling that the casing system must endure are severely higher than in typical vertical drilling. Robit® has developed a system which is capable of handling even the toughest conditions.
The Robit® HZ -system consists three parts; pilot bit, ring bit assembly with the ring bit and protective layer and impact shoe. The pilot bits hits directly the casing via the welded casing shoe. This causes that all the efforts of pulling the tube is diverted to the impact shoe and not on the ring. The ring bit is rotated with the pilot bit. This system leads to a longer life time of the ring bit, better penetration during drilling and increased reliability to finish the hole on time and according to plans.
| Casing OD (mm) | 139,7 |
| Casing OD (in.) | 5 ½ |
| Casing Max Wall (mm) | 10 |
| Casing Max Wall (in.) | 0.394 |
| Ring bit ID (mm) | 84 |
| Ring bit ID (in.) | 3.307 |
| Ring bit OD (mm) | 158 |
| Ring bit OD (in.) | 6.220 |
| Pilot bit OD (mm) | 117 |
| Pilot bit OD (in.) | 4.606 |
| Hammer | 4” |
| Product number | 03-011-139-4510 |
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