How deep can a truck mounted drill rig bore into the earth

The depth that a truck-mounted drill rig can bore depends on many factors, including the specific rig model, the type of drilling method used, and the geological conditions at the drilling loacated. 

Generally, truck-mounted drill rigs are capable of drilling to significant depths, ranging from a few hundred feet to several thousand feet. However, more deeper drilling requires more powerful and specialized equipment.

For geotechnical investigations or water well drilling, a typical truck-mounted drill rig can reach depths of 500 to 1,500 feet. These depths are achievable using drilling methods like rotary drilling or percussion drilling, which are commonly employed by truck-mounted rigs.

In cases where deeper drilling is required, specialized rigs with higher drilling capabilities may be used. These rigs often utilize advanced drilling techniques such as diamond core drilling or reverse circulation drilling. With these methods and more powerful equipment, depths of several thousand feet or even tens of thousands of feet can be reached.