Method of Drilling
| Method of drilling | RC (Reverse Circulation) | ||
| RC (Reverse Circulation) | |||
| Metric | U.S | ||
| Hole Size | 101.5mm – 304.5mm | 4” – 12” | |
| Recommended Hole Diameter | 203.3mm | 8” | |
| 5.0” Drill Rod | 300 meters | 984 feet | |
| 4.5” Drill Rod | 360 meters | 1181 feet | |
| 3.5” Drill Rod | 490 meters | 1607.5 feet | |
Power Unit
| Engine | Cummins or Ashok Leyland |
| Model | A4 |
| Power | 260 HP |
| Speed | 2300 Rpm |
| Engine Type | Diesel Turbocharged |
| Cooling | Water Cooled |
| Safety | Auto Fire System (Inside the Canopy) |
| Canopy | Fully covered steel enclosure with lockable door |
Mast (Dumping Type 45° – 90° angle):
| Metric | U.S. | |
| Type | Dumping Mast | |
| Total Length | 9.6 meters | 31.4 ft |
| Top of table to Spindle | 8.2 meter | 26.9 ft |
| Top of table to spindle sub | 7.5 meter | 24.5 ft |
| Mast raising & lowering | Dual hydraulic cylinders with load safety valves | |
| Mast Dump | Single hydraulic Cylinders with load safety valves | |
Rotation Head:
| Model | Top Drive PRL 250RC (Reverse Circulation) | |
| Type | Heavy Duty single reduction Gearbox. | |
| Drive Motor | Hydraulic – Fixed displacement | |
| Max fluid operating pressure | 27.7bar | 400 PSI |
| Lubrication | Self-lubrication | |
| Speed | 115 rpm | |
| Torque | 4696 NM | |
FEED SYSTEM:
| Metric | U.S. | |
| Type | Wire rope over cylinder | |
| Head travel | 7.5 m | 24.5 ft |
| Rod hosting length | 6 m | 19.5 ft |
| Pull Back Force | 13 tons | 28660.9 lbs. |
| Pull down force | 6 tons | 13227.7 lbs. |
| Fast Feed Up | 30 meters/min | 98.4 ft/min |
| Fast feed down | 42 meters/min | 137.7 ft/min |
| Fine feed speed | 4.5 meters/min | 14.76 ft/min |
Auxiliary Winch:
| Metric | U.S. | |
| Hoisting Capacity | 29.9 KN (3 tons) | 6721 lb |
| Hoisting speed | 40 meters/min | 131 ft/min |
| Cable diameter | 12 mm | |
| Cable length | 35 meters | 114 ft |
| Drive motor | Fixed Displacement | |
| Static / Dynamic Braking | Spring applied hydraulic release / Over center valve | |
| Mounting | Mast | |
| Note | Do not use multiple part lines with the winch. Use only single line. | |
Mist Pump:
| Type | Triplex Piston Pump |
| Power | Hydraulic operated |
| Max flow | 30 LPM |
| Max pressure | 6.895 MPa (1000 PSI) |
Hamer Lubricator:
| Type | Venture |
| Tank | Pressurized by air |
| Capacity | 1500CFM@400PSI |
Air / Blow Down Valves:
| Type | Air |
| Rating | 3000 PSI |
| Valves | Air Valve, Air Vent |
| Type of Operation | Hydraulic |
Rig Lighting / Horn:
| Lightening | Mast mounted LED lights 2nos, Drive LED Lights, Beacon Flash |
| Horn | For Tramming & Reverse |
Safety:
|
Safety features |
2 Nos. Dry type Fire Extinguisher fitted on the machine. |
| Safety Guarding on all rotating and moving components. | |
| 4 Emergency stop buttons fitted at different locations for easy
access. |
|
| Horn to alert drill crew. | |
| All moving hoses are covered. | |
| Crown block rope jumping safety stopper is provided | |
| Auto fire safety system for engine | |
| Safety stoppers provided for top drive (mechanical) |
Hydraulics:
| Main Pump | Type | Variable Displacement |
| Controller | Load Sensing | |
| Working Pressure | 280 Bar | |
| Auxiliary pump (water) | Type | Fixed Displacement |
| Working Pressure | 260 Bar | |
| Auxiliary pump (auto feed & Cooler) | Type | Fixed Displacement 200 Bar |
Control Panel:
| Gauges | Hold back, pull down, main pressure, water pressure |
| Engine speed | lockable control handle for controlling engine RPM. |
| Stop | Emergency Engine Stop |
| Rotation control | Manually adjustable control for rotation Speed. Control knob for torque control of Rotation Head |
| Load Indication | Load gauges are mounted for hold back, pull down. |
| Water pump | Fine control valve has been provided on the panel |
| Pilot controls | Hydraulic operated Joysticks for Rotation/Feed |
| Pull Up gauge | Load indicator in Bar & psi |
Air Compressor:
| Make | ELGI |
| Model | 1500/400 |
| (Max. Free Air Delivery (Flushing)) CFM | 500 |
| (Pressure) PSI | 400(21 Bar) |
| Engine | KTTA 19C, Cummins |
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