The series of PRAKLA RB 25 and RB 30GT Universal Rotary Drilling Rigs has been completely reworked and upgraded, technically as well as power-wise.
The rigs enable each user to drill with the following methods, with borehole diameters of 4″ (108 mm) to 30″ (762 mm) and drilling depths up to 400 m.
- Rotary-drilling with direct circulation
- Rotary-drilling with reverse circulation
- Auger drilling
- Percussion core drilling (ram coring)
- Wire-line core drilling
- Down-The-Hole hammer drilling
- Free-fall drilling
Technical Data
| Chassis | |
|---|---|
| 2-axle truck | 4 x 4 |
| e.g. MAN, TGA 18.320 | 320 HP |
| Mast | |
| Mast height aGL | 38 ft |
| Casing installation height | 24 ft |
| Free working height power swivel | 24 ft |
| Regular operational hook load | 33,720 lbf |
| max. permissible hook load | 45,000 lbf |
| Feed device (hydr. cylinder) | |
| Push-down / Pull-back force | 15,700 / 31,470 lbf |
| Feed speed | 0-2.6 ft/sec |
| Power swivel | |
| gear select, 3 speeds | |
| Torque at 0-35 rpm | 10,547 lbf-ft |
| Torque at 0 – 96 rpm | 3,725 lbf-ft |
| Torque at 0 – 340 rpm | 1,106 lbf-ft |
| I.D. hollow shaft | 5 1/8″ |
| Carrying capacity | 45,000 lbf |
| Auxiliary winch | |
| Line pull 1st layer | 5,170 lbf |
| Wire rope diameter / Rope length | 3/8″ / 164 ft |
| Coring winch / sand winch | |
| Line pull 1st layer | 4,500 lbf |
| Wire rope diameter / Rope length | 5/16″ / 1,640 ft |
| Piston mud pump | Duplex 4-1/2″ x 5″ |
| Discharge capacity | 120 gal/min |
| Operating pressure | 190 psi |
| Centrifugal mud pump | Mission Magnum 4″x3″x13″ |
| Discharge capacity | 530 gal/min |
| Operating pressure | 101 psi |
| Compressor | |
| 1 Stage, Screw type | Atlas Copco XAH 4 |
| Discharge capacity | 466 cfm |
| Operating pressure | 203 psi |
Further alternatives acc. to customer specification after technical clarification.