Rotary Drilling Rig Prakla RB 25 / RB 30GT

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

Drill Rig Prakla RB 25 [pdf, 2.36 Мб]

Prakla RB 25

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.