What are the benefits of DTH?

In mines, quarries, geotechnical investigations, and construction projects, full hydraulic down-hole drilling rig has been widely used and has become an important drilling technique. This method allows the impact energy to directly act on the drill bit, reducing transmission losses, not only improving drilling efficiency, but also better coping with various complex geological conditions.

1.Efficient drilling

The blast hole drill’s down the hole hammer is installed directly above the drill bit, which can transfer the impact energy to the drill bit almost without loss. This is completely different from the gradual attenuation of impact energy transmitted along the drill rod in top hammer drilling. Therefore, down the hole drilling is more efficient in breaking rocks, especially hard rock layers. In typical hard rock environments, its drilling speed is 2 to 5 times faster than traditional methods.

2.Excellent adaptability to hard rock

A blast hole drill can easily handle hard, highly abrasive, and fractured rocks such as granite, basalt, and quartzite. These rock layers are prone to rapid wear or jamming of conventional drill bits, but down the hole drills can efficiently break hard rocks by combining high-frequency impact and rotational force, while avoiding excessive tool wear.

3.Better drilling straightness

A stable hammer drill combination ensures that the down the hole drill can drill more vertical and uniform holes. This precision is crucial for blast hole drilling (precise hole alignment is key to achieving controllable blasting) and geotechnical exploration (ensuring reliable sampling and testing results).

4.Reduce drill pipe wear

For the full hydraulic down-hole drilling rig, the impact force directly acts on the drill bit, not the drill rod. This means that the drill rod only bears rotational and tensile loads, avoiding impact stress. Therefore, the fatigue and wear of drill pipes are greatly reduced, which not only reduces maintenance costs but also extends the service life of drilling tools of the hydraulic crawler drilling rig.

5.Widely applicable scenarios

full hydraulic down-hole drilling rig  is suitable for various job scenarios:

Mining and quarrying: blasting hole drilling

Geotechnical Engineering: Drilling of Anchor and Grouting Holes

Water well drilling: Deep water well drilling in hard rock areas

Exploration drilling: coring drilling and mineral exploration

In addition, the down the hole drilling system can be flexibly matched with various types of drilling rigs (portable, crawler, vehicle mounted) to perfectly adapt to on-site working conditions.

6.Lower energy consumption per meter drilling

Although the output power is high, the energy utilization efficiency of the full hydraulic down-hole drilling rig’s down the hole drill is higher due to the reduction of energy waste caused by drill rod vibration. For large-scale drilling projects, this means that the fuel or electricity cost per meter of borehole can be reduced.

7.Suitable for deep hole operations

The energy loss during transmission is extremely low, making full hydraulic down-hole drilling rig still efficient in deep hole operations at depths of hundreds of meters. In contrast, the efficiency of top hammer drilling decreases sharply as the drill rod grows and energy dissipates along the rod.