Dando Mintec 12.8The Dando Mintec 12.8 is an extremely powerful mid-range mineral exploration drilling rig. The machine is capable of deploying wireline drilling, RC drilling (reverse circulation drilling) and RAB drilling (rotary air blast drilling.) The rig is suitable for all types of mineral exploration and has been proving very successful for Indonesian coal exploration.
Carrier Vehicle: Type: Crawler chassis
Power Unit*: 540HP 6 Cylinder diesel engine
Drilling Capacity: Pullback: 12,800kg. Pulldown: 7,500kg. Hook load(max): 12,800kg.
Mast Dimensions: Working Mast Height: 9,140mm. Working Stroke: 7,600mm
Mast Dump: To 45 degrees degrees
Rotary Head Performance*: Option 1: Speed (max): 750rpm, Torque (max) : 12,050Nm (RH11 head)
Option 2: Speed (max): 1,290rpm. Torque (max): 5,670Nm
Circulating Swivel Unit: Internal Diameter: 51mm. Operating pressure(max): 600psi
Breakout and Clamps* Min Clamping Diameter: 60mm. Max Clamping Diametre: 220mm. Load Suspending Capacity: 12,800kg.
Casing Divertor: 150mm ID
Wireline Footclamps: To suit BQ-PQ Wireline drill rods.
Main Winch*: Hoist (single line, bare drum): 10,240kg. Speed (single line, bare drum): 68m/min. Drum capacity: 56m @ 22mm
Wireline Winch*: Hoist (single line, bare drum): 2,244kg. Speed (single line, bare drum): 167m/min. Drum capacity: 1,600 @ 6mm
Tool Handling Winch*: Hoist (single line, bare drum): 1,326kg. Speed (single line, bare drum): 15m/min. Drum capacity: 30m @ 8mm
Coring Pump: Flow rate (max): 200l/m. Discharge pressure (max): 500psi.
In Line Oiler: Fitted to assist DTH operations
Control:Hydraulic Power circuit based on load sensing, proportional valves. Drilling controls available from driller's
Levelling Jacks: Two front and two rear
Rig Lighting: Fitted as standard
Compressor: Ingersoll Rand XHP900 (900rpm/350psi)
Maximum Drilling Depths**:
NQ (7.58kg/m) drill rods-1,351m
NWY (8.0kg/m) drill rods-1,280m
HQ (11.45kg/m) drill rods-891m
4" RC (32.0kg/m) drill rods-320m
*other options available
**calculated from the weight of drill rods only and using 80% of the rig's pullback