Core drilling is one of the most direct and effective geological exploration methods, capable of directly revealing the geological formations and their properties in front of the tunnel face. China is one of the countries with the largest scale and the most challenging tunnel construction projects in the world. Currently, a large number of deep and long mountain tunnels are under full-scale construction, with harsh and complex geological conditions.
To minimize the risks of tunnel construction, higher precision in geological forecasting before tunnel construction is required. Using drilling equipment for core drilling ahead of the tunnel face can directly reveal the lithology, structure, groundwater, karst formations, and weak interlayers of the geological formations in front of the tunnel face, making it one of the most direct and effective advanced geological forecasting methods.
The Important Role of PDC Core Drill Bits in Core Drilling
As the drilling depth of core drilling increases, the possibility of encountering hard rock formations also increases, demanding higher requirements for the design of core bits in hard rock formations. Currently, wireline coring is widely used in small-diameter core drilling. If the drilling speed and service life of the core bit are not satisfactory, frequent tripping in and out of the hole will occur, increasing the manpower and time costs of the drilling project. Therefore, improving the drilling speed and service life of core bits in hard rock formations is one of the important ways to improve the efficiency of deep-hole geological exploration.
The main type of core bit is the Polycrystalline Diamond Compact (PDC) bit. PDC core drill bits feature a fast drilling speed and excellent rock-breaking capabilities.
The design of PDC core drill bits needs to be compatible with the properties of the drilled rock. The rock's physical and mechanical properties related to bit design include compressive strength, drillability, hardness, erosion of rock powder, the physical composition and granularity of the rock, abrasiveness of the core, etc. Based on the rock properties, the design parameters for PDC core drill bits include lip shape, nozzle type, matrix hardness and wear resistance, diamond size on the surface set bit, diamond concentration on the impregnated bit, the number of brazed carbide inserts, and more.
Why Choose EXCELLENT's PDC Core Drill Bits?
As one of the professional PDC core bit manufacturers, EXCELLENT's PDC core drill bits are robust and durable, offering excellent performance. They ensure smooth drilling and complete core retrieval even in challenging formations, thereby minimizing downtime and reducing costs. Choosing EXCELLENT's PDC core drill bits enables your drilling operations to be conducted safely and efficiently!
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