The key characteristics of the THD35 drilling rig are as follows:

1. Mounting: The THD35 drilling rig is truck-mounted, providing mobility and ease of transportation to various job sites.

2. Versatility in Applications: Ideal for foundations, mineral exploration, and water wells, the THD35 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 16,000 kg (35,270 lbs) to no less than 34,090 kg (75,155 lbs), providing substantial force for efficient drilling operations.

4. Drilling Methods: Designed primarily for mud rotary drilling, the rig also supports limited air blast and D.T.H hammer drilling when fitted with suitable options. This versatility allows for adaptation to various geological formations and project requirements.

5. Drilling Specifications:
   - Hole Size: Ranging from 203mm (8") to a depth of 457m (1500 ft).
   - Pulldown Force: 25,000 kg (55,000 lb).
   - Pullback Force: 25,000 kg (55,000 lb).
   - Variable Head Speeds: Ranging from 0 to 60 RPM and 0 to 120 RPM, with corresponding torque ratings.
   - Winch Capacity: Options available for 8000 kg or 10000 kg winch capacity.
   - Mud Pump Options: Available in sizes of 5-1/2 x 8 or 7-1/2 x 8.

6. Adaptability and Customization: The THD35 can be fitted with suitable options such as different drilling tools, winch capacities, and mud pump sizes to enhance its functionality and meet specific drilling requirements.

Overall, the THD35 drilling rig offers robust pullback capacity, versatility in drilling methods, and adaptability to various drilling applications, making it well-suited for foundation drilling, mineral exploration, and water well projects.