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CDR 400 Core Drilling Rig

Technical Description BHS - CDR 400 Core Drilling Rig:

• DESCRIPTION: BHS Make, CDR 400 Core Drilling Rig, Top Drive all Hydraulically Operated Truck mounted Drilling Rig is designed for Core drilling for Geo-technical investigation (Geological survey) applications.

Drilling Capacity:
Core Drilling (Wire line or conventional)   Parameters
    SI   FPS
B Wireline or Conventional   400 mtrs   1300 feets
N Wireline or Conventional   300 mtrs   1000 feets
H Wireline or Conventional   185 mtrs   600 feets
P Wireline or Conventional   100 mtrs   328 feets
Note: Under favorable Drilling conditions.

Sturdy structural Box type Mast of electrically welded construction, main members made out of heavy duty structural steel material reinforced with suitable cross members. So that it is strong enough to withstand the high drilling loads. The dumping arrangement shall be provided for drilling upto 45◦ angle.

Mast Length  

10000 mm


393 inches

Rotary Head Travel


7000 mm


275 inches

Centraliser Opening


203 mm


8 inches

Raising & Lowering


With Hydraulic cylinder

Rotary Head:
Heavy duty Hydraulically Driven Top Head Rotation Unit is provided with High & Low speeds given below. The Rotation head is provided with slide out or swing out arrangement.

Max. Speed I  

700 rpm



Max. Torque at Speed-I


50 Kgf-m


360 Lb-ft

Max speed II


300 rpm



Max Torque at Speed II


145 Kgf-m


1050 Lb-ft

Feed System:
Feed system is provided with adequate travel for handling Drill Pipes & Casing pipes upto 6 Mt. long. The feed system is actuated by a suitable Hydraulic cylinder with wire rope and pulley arrangement. The feed system has the following capabilities:

Max. Pull Back / Up Capacity


9000 Kgf


19836 lbs

Max. Pull Down Capacity


3300 Kgf


7200 lbs

Max. Pull Back / Up Speed


40 mtr/min


130 ft/min

Revving Ratio





No. of Cylinders


1 No.



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

210 kg/cm2

Hydraulic Tank Capacity


Filtration (Nom.) Return Line

10 microns

Hydraulic Oil Cooler

120 GPM (Fin type Oil to Air)

Prime Mover:
Truck Mounted Rig with power drawn from the Truck engine with suitable PTO arrangements. Optional: Separate Deck engine can also be mounted for the power source as per the customer requirement.

Stabilizers (Jacks): System consist of four hydraulic leveling jacks with reverse flow restricted valves to ensure safe operation. Two numbers are at the front (operator side) the rig controlled by two separate valves and Two jacks at the rear side of the rig controlled by a single valve.

Max. Operating pressure

210 kg/cm2

Hydraulic Tank Capacity


Wireline Hoist Capacity:
A suitable main hoist of following capacities shall be provided, on top of the mast.

Max. Bare Drum Pull


1000 kgf


2204 lbs

Max. Speed


100 m/min


330 ft/min

Cable Size


6 mm dia.


0.23 Inches



Hydraulic motor



• BHS Drilling Rigs can be supplied in custom-built models in various Configurations as indicated below, Mounting features to suit all special requirements and Teechnical specifications can be offered accordingly.

CDR 800, capable of drilling upto 800 Meters both in wireline Q and conventional.

CDR 1500, capable of drilling up to 1500 Meters both in wireline Q and conventional.