WATER WELL DRILLING RIGS
 
  PRD 450 Portable
  PRD 500 Trolley
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  PRD 650
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  PRD Super Drill 1500
  PRD Max Drill 2000
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  PRD 1500 R
  MINING DRILLING RIGS
 
  PRD Multistar
  Reverse Circulation Drilling
  Core Drilling
  Pole Drilling
  Wagon Drilling
  EQUIPMENT
 
  Hydrofracture Units
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  DRILLING ACCESSORIES
 
  PRD Mud Pump
  Down the Hole Hammers
  Bits

  Mining Drilling Rigs - Reverse Circulation Drilling
Reverse Circulation
TECHNICAL SPECIFICATIONS
CAPACITY
To drill holes of 6" - 7" capacity by DTH cum reverse rotary method up to 400 mts ( 1320 ft )
PRIME MOVER
Truck mounted with power from truck engine or skid mounted with power from deck engine
WORK METHOD
Rotation with direct circulation, nucleus destruction with bleeding by water, by
reverse circulation method with DTH hammer
MAST
Box type structure will be provided with feed cylinder (140 x 80 x 2350)
and wire rope reeving of 1:3 ratio with angle drilling up to 450
Max Capacity – 15 tons ( 33,000 lbs )
Height – 8 mtr ( 27 ft )
Rod handling capacity – 6 mtr ( 20 ft )
PULL UP AND PULL DOWN

By means of Hydraulic cylinder and wire rope Reeving Ratio 1:3

Max Pull up force    -  10750 kg ( 3650 lbs )
Max Pull up speed   - 40 mtr / min ( 132 ft / min )
Max Pull down force  - 7250 kgs ( 10550 lbs )   
Max Pull down speed – 60mtr / min ( 198 ft/min )
HYDRAULIC SYSTEM
210 kg/cm2 ( 3000 psi )
ROTARY HEAD
Two speed rotary head is powered by two speed hydraulic motor with Swivel attachment for
mud/water suitable for reverse circulatory and DTH drilling
Max Torque       -   460 kg mtr (40000 inch - lbs)
Max Speed        -   0 to 1000 RPM
JACKS
125 x 70 x 795 mm stroke
WATER INJECTION PUMP
Triplex reciprocating pump of 100 lpm 1000 psi powered by hydraulic motor. Triplex reciprocating
pump of 100 lpm 1000 psi
BREAK OUT WRENCH
To open the drill joints hydraulic breakout wrench of 350mm stroke will be provided with rope
attached
SUITABLE COMPRESSOR
1000 cfm 300 psi / 1150 cfm 300 psi or 900 cfm 200 psi
OPTIONAL ATTACHMENTS
Manually operated corousal four rod changer to handle four nos drill pipe rods to couple drill head.
A2 ton winch is provided to handle drill rods and other tools
CYCLONE
Will be supplied for reverse circulatory drilling and will be mounted on the rig