Keywords: Core drilling rig selection, high core recovery rate, exploration efficiency, drilling depth, diamond drill bit
In geological exploration, the core recovery rate directly impacts data accuracy. If the formation is fractured or drilling parameters are inappropriate, the core is prone to breakage and wear. It is recommended to prioritize core drilling rigs with a hydraulic automatic feed system, which can adjust the pressure in real time according to the rock hardness. Combined with a double-tube single-action drilling tool, this can reduce core disturbance. For example, in granite exploration, using a “low speed + constant pressure follow-up” mode can increase the recovery rate from 70% to 95%.
But the question remains: how to balance drilling speed and core integrity when dealing with deep, complex formations?
Follow us, and in the next issue, we will reveal the groundbreaking application of downhole power drilling tools in ultra-deep hole exploration…