The key characteristics of the THD300 drilling rig are as follows:

1. Mounting Flexibility: The THD300 drilling rig can be mounted on either tracks or trucks, offering versatility in transportation and deployment. This allows for access to various terrains and job sites.

2. Versatility in Applications: Ideal for open hole drilling, water wells, and mineral exploration, the THD300 is suitable for a wide range of drilling operations across different industries.

3. Pullback Capacity: The rig has a rated pullback capacity ranging from no less than 4000 kg (13,230 lbs) to no less than 6000 kg (13,230 lbs), providing sufficient force for efficient drilling operations.

4. Rotary Drilling Capability: Designed to handle rotary drilling methods with air, mud, or D.T.H hammer, the THD300 offers flexibility in drilling techniques to accommodate various geological formations and project requirements.

5. Drilling Specifications:
   - Open Hole Diameter: 120mm (4-3/4") to a depth of 200m (656 ft).
   - Coring Capacity: HQ size to a depth of 330m (1062 ft).
   - Pulldown Force: 4500 kg (9920 lb).
   - Pullback Force: 6000 kg (13,227 lb).
   - Variable Head Speeds: Ranging from 0 to 100 RPM, 0 to 200 RPM, and 0 to 800 RPM, with corresponding torque ratings.
   - Coring Pump: W-11.

6. Adaptability and Customization: The THD300 can be fitted with suitable options to enhance its functionality and meet specific drilling requirements, such as additional drilling tools or specialized equipment.

Overall, the THD300 drilling rig combines robust pullback capacity, versatility in mounting options, and adaptability in drilling methods, making it well-suited for mineral exploration, open hole drilling, and water well projects in various geological settings.