Rotary Drills

KLR DTHR300 Model. Top drive DTH cum Rotary Combination Hydraulically Operated Truck Mounted Drilling Rig, Designed to handle DTH Drilling and Rotary drilling upto a maximum depth of 300 meters.

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Drilling Rigs
Truck Mounted Drilling Rigs - DTH cum Rotary Drill Rig - KLR DTHR 300
Technical Specifications
KLR DTHR300 Model. Top drive DTH cum Rotary Combination Hydraulically Operated Truck Mounted Drilling Rig, Designed to handle DTH Drilling and Rotary drilling upto a maximum depth of 300 meters.
DTH Drilling
Drilling hole Diameter 203 mm 8 Inches
Max. Overburden Drilling Diameter 254 mm 10 Inches
Max. Drilling Depth 300 Mtr 1000 feet
Drill Pipe size 114 mm 4.5 Inches
Drill Pipe wall thickness 8.9 mm 0.35 Inches
Length of the Drill Pipe 6.1 Mtr 20 feet

Note: Under favorable Drilling conditions.
Rotary Drilling
Drilling Diameter 311 mm 12 ¼ Inches
Max. Casing Pipes Capacity 203 mm 8.0 Inches
Max. Drilling Depth 300 m 1000 feet

Note: Under favorable Drilling conditions.
Box type Mast of Electrically welded construction, main members made out of heavy duty structural steel tubes, reinforced with suitable cross members.

Mast Length 8800 mm 29 Feet
Rotary Head Travel 7000 mm 23 Feet
Centraliser Opening 355 mm 14 Inches
Rod handling Capacity 6.1 m 20 Feet
Raising & Lowering With Hydraulic Cylinder

Rotary Head
Heavy duty Hydraulically Driven Top Head Rotation Unit having infinitely variable speed (0 to 100 rpm) will be provided. This Unit travels on the Mast and is sturdy construction to absorb sudden shock loads generally encountered during Drilling Operations.

Max. Speed 100 rpm
Max. Torque 550 kgfm
Drive Motor model Orbital Motor (0MV 400 or equivalent)
No. of Motors 2 Nos.

Feed System
Feed system is provided with adequate travel for handling drill pipes & Casing pipes upto 6 Mt. Long. The feed and hoist are actuated by a suitable hydraulic cylinder with wire rope and pulley arrangement. The feed system has the following capabilities.

Pull back/Up Capacity 14500 Kgf
Pull down Capacity 7500 Kgf
Pull Back/Up Speed 20 Mtr/mm
No. of Cylinders 1 No.
Reeving Ratio 1:3

The feed system will be incorporated with Hold back arrangement to control and limit weight on bit, rapid and slow feed arrangement to suit the variable ground conditions.
Hydraulic System

Max. Operating Pressure 220 kg/cm2
Hydraulic Tank Capacity 800 Lt
Filtration (Nom) Return Line 10 microns
Hydraulic Oil Cooler 120 GPM (Fin type Oil to Air)

Prime Mover
The entire rig unit including mud pump shall be mounted on the truck, power drawn from the deck engine with suitable PTO arrangement for the Hydraulic system.
Stabilizers (Jacks)
System consists of four hydraulic leveling jacks with Reverse flow restricted valves to ensure safe operation. Two numbers are at rear of the rig controlled by a single valve. and two separate valves for the Two jacks at the front of the rig. (Operator side)
Water Injection Pump
The drill rig will be provided with Hydraulically operated triplex plunger pump, for injecting water/foam with necessary piping and flow control valve.

Max. Flow 36 lpm
Max. Pressure 40 kg/cm2

Breakout Wrench
The Drill Rig is equipped with Hydraulically operated breakout wrench for breaking drill pipes.

Cylinder bore diameter 80 mm 3.1 Inch
Stroke 300 mm 12 Inch

Mud Pump
Hydraulically driven Duplex, double acting reciprocating 6 x 6 model Mud pump is required for rotary drilling. This mud pump is suitable for handling clear water, drilling mud and bentonite solutions.

Bore 150 mm 6 Inches
Stroke 150 mm 6 Inches
Max. Flow 1021 lpm
Max. Pressure 20.74 kg/cm2

Single Rod Changer  with One Ton Winch Assly (Optional) Manually operated single rod changer will be provided for changing the drill pipes. Hydraulically operated auxiliary winch of capacity 1.0 ton is mounted on mast to handle the casing pipes, drill pipes and other handling tools.

Bare Drum Pull 1000 kgf
Max Speed 20 m/min

Air Compressor and Mounting
Air compressor of following capacity is required for DTH Drilling.

Capacity 1100 cfm / 300 psi
Make ELGI / IR

Air compressor shall be mounted on a separate suitable truck with separate hydraulic package/side P.T.O arrangement as required and four dia 100 stabilizers(jacks)
Welding Generator (Optional)
Hydraulically driven Welding generator set of capacity 320 Amps at 60% duty cycle is required.

Make Swaraj / equivalent
Drive Hydraulic
KLR Drilling Rigs can be supplied in custom-built models in various Configurations as indicated  below, Mounting features to suit all special requirements and Technical specifications can be offered accordingly.
KLR DTHR 600, capable of drilling up to 600 Meters (~2000 Feet)
KLR DTHR 750, capable of drilling up to 750 Meters (~2500 Feet)
KLR DTHR 1000, capable of drilling up to 1000 Meters (~3300 Feet)


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