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A truck-mounted DTH drilling rig is a drilling machine that combines a down-the-hole drilling system with a truck chassis, allowing the rig to move quickly between drilling sites while using a down-the-hole hammer to break rock at the bottom of the borehole. This configuration is particularly useful for projects that require frequent relocation, such as water well drilling, geological exploration, and drilling in areas with good road access. Compared with crawler-mounted rigs, the main advantage of a truck-mounted configuration is transportation efficiency.
A truck-mounted DTH drilling rig consists of a drilling system installed on a truck or specialized vehicle chassis. The truck provides the mobility needed to travel between drilling locations, while the drilling system provides the rotation, feed force, compressed air, and other functions required to drill the borehole.
The DTH part refers to the drilling method. In DTH drilling, the pneumatic hammer is positioned directly behind the drill bit at the bottom of the borehole. Compressed air powers the hammer, which delivers repeated impact energy directly to the rock.
The truck-mounted configuration and DTH drilling method therefore describe two different aspects of the same machine: the truck chassis determines how the rig moves, while the DTH system determines how it breaks rock.
The rig first travels to the drilling location using its truck chassis. Once it reaches the site, hydraulic leveling legs or other stabilizing systems are used to position the machine securely before drilling.
During drilling, the rotary system turns the drill string while the feed system pushes the drill string and DTH hammer toward the formation. Compressed air is supplied to the down-the-hole hammer, which creates repeated impacts against the drill bit.
The bit breaks the rock at the bottom of the borehole while the compressed air also helps carry drilling cuttings toward the surface.
Because the impact mechanism is located close to the drill bit, DTH drilling is particularly suitable for hard and fractured rock formations. The truck chassis then allows the complete drilling system to be moved to the next location without requiring a separate transport vehicle.
The main reason to choose a truck-mounted configuration is mobility.
When a drilling project includes multiple sites connected by roads, a truck-mounted rig can travel directly between locations. This can simplify relocation compared with a crawler-mounted rig that may require additional transportation between distant sites.
Truck-mounted rigs can also provide a practical combination of drilling capability and transportation. The drilling system, power source, hydraulic components, and other major systems can be integrated with the vehicle chassis rather than transported as separate equipment.
However, truck-mounted rigs are not suitable for every site. They are most practical where road access is available and the drilling area provides enough space for the vehicle to enter, position, and stabilize.
The main difference is mobility between drilling sites.
|
Feature |
Truck-Mounted DTH Rig |
Crawler-Mounted DTH Rig |
|
Main mobility advantage |
Fast road transportation |
Better off-road mobility |
|
Road travel |
Suitable for road-based relocation |
Usually requires separate transport for long-distance road travel |
|
Rough terrain |
More dependent on road and site access |
Better suited to uneven or difficult terrain |
|
Setup between sites |
Generally quick when access is good |
Good maneuverability around the drilling area |
|
Typical application |
Multiple sites with good road access |
Mines, rough terrain, construction areas, and difficult-access sites |
The choice therefore depends less on the DTH drilling principle and more on the conditions between and around the drilling locations.
Truck-mounted DTH drilling rigs can be used for projects where hard-rock drilling and frequent relocation are both important.
For water well projects, a truck-mounted rig can move between multiple well locations and use a DTH hammer when the formation requires impact drilling. They can also be used for geological exploration, prospecting boreholes, and other drilling applications where road access makes truck transportation practical.
The drilling diameter, drilling depth, air pressure, compressor capacity, and hammer size still need to be matched to the actual formation and project requirements. A truck chassis alone does not determine the drilling capability of the machine.
Kaishan’s KWMT800 is a truck-mounted water well drilling rig with an integrated automobile or special chassis. The drilling rig, power system, mud/air circulation system, winch, and hydraulic system are integrated into the chassis.
The machine uses a high-power diesel engine for traveling and drilling, with hydraulic drive as the mainstream configuration. The official product page also notes that some configurations are equipped with a pneumatic impact system, making the platform suitable for drilling applications that require impact drilling.
The KWMT800 is designed for water well drilling as well as mine engineering, geological exploration, prospecting boreholes, and underground auxiliary drilling. Its technical configuration includes a maximum drilling depth of 800 m and a drilling diameter range of Φ140–400 mm.
|
Drilling |
Model |
KWMT800 |
|
Maximum drilling depth |
800 m |
|
|
Drilling diameter |
Φ140–400 mm |
|
|
Available drilling depths |
180 / 200 / 300 / 400 / 500 / 600 / 800 m |
|
|
Drill Pipe & Power |
Drill pipe length |
1.5 / 2.0 / 3.0 / 6.0 m |
|
Equipped power |
153 kW |
|
|
Air & Mobility |
Air pressure |
1.7–3.5 MPa |
|
Climbing capacity |
Max. 30° |
|
|
Machine |
Weight |
21,500 kg |
|
Voltage |
24 V |
|
|
Dimensions (L × W × H) |
6300 × 2300 × 2850 mm |
The exact drilling configuration should be selected according to the required hole diameter, formation conditions, drilling method, and site access. For projects specifically requiring DTH drilling, the hammer, air supply, drill pipe, and compressor configuration should be matched as a complete system rather than selected independently.
The first factor to consider is the drilling formation. DTH drilling is generally associated with harder rock, but the hammer and bit still need to be selected according to the actual formation.
The second factor is road and site access. A truck-mounted rig is most useful when the drilling locations can be reached by road. If the project involves steep, muddy, or highly uneven terrain, a crawler-mounted configuration may be more practical.
The third factor is the required drilling diameter and depth. These requirements determine the appropriate drill pipe, hammer, rotary system, feed capacity, and air supply.
Finally, consider the compressed-air system. DTH drilling depends on compressed air to operate the hammer and remove cuttings, so compressor capacity and pressure need to match the selected hammer and drilling conditions.
Kaishan offers different drilling rig configurations for water well, DTH, mining, tunneling, and geological drilling applications. Its product range includes truck-mounted water well drilling rigs, integrated DTH drilling rigs, crawler DTH drilling rigs, and other specialized drilling equipment.
For a truck-mounted drilling project, the appropriate configuration depends on the required drilling method, hole diameter, formation, mobility requirements, and site conditions. Kaishan can recommend a suitable machine configuration based on these project requirements.
A truck-mounted DTH drilling rig combines a truck chassis with a down-the-hole drilling system. The truck provides mobility between drilling sites, while the DTH hammer provides impact energy directly at the bottom of the borehole.
Its main advantage is mobility between drilling locations. When sites have suitable road access, the rig can travel directly from one location to another without requiring separate long-distance transportation.
Yes. DTH drilling is widely used for hard-rock formations because the pneumatic hammer delivers impact energy directly near the drill bit.
A truck-mounted rig is better suited to projects requiring road-based relocation, while a crawler-mounted rig generally provides better mobility on rough or uneven terrain.
The KWMT800 is a truck-mounted water well drilling rig, and its official product information states that some configurations are equipped with a pneumatic impact system. The exact drilling configuration should be confirmed according to the project requirements.
Important factors include formation conditions, drilling diameter, required depth, compressed-air requirements, road access, site conditions, and the required DTH hammer and drill pipe configuration.
