HQ and PQ coring refer to two different standard sizes of core samples taken during drilling operations, particularly in the mining and geology industry. The main differences lie in the diameter of the core samples and their applications.
HQ Coring:
Core Diameter: HQ cores have a diameter of approximately 63.5 millimeters (2.5 inches).
Common Applications: HQ coring is often used in mineral exploration and geological surveys. It provides a larger core sample compared to smaller sizes, allowing for a more detailed analysis of the rock formations.
PQ Coring:
Core Diameter: PQ cores are larger, with a diameter of approximately 85 millimeters (3.345 inches).
Common Applications: PQ coring is typically employed in cases where a larger core sample is necessary, such as in certain mining and geotechnical applications. The larger diameter allows for a more extensive examination of the geological and structural characteristics of the subsurface.
The choice between HQ and PQ coring depends on the specific requirements of the drilling project and the level of detail needed in the core samples for geological analysis. It's essential for professionals in the field to select the appropriate coring size based on the objectives of the drilling operation and the geological conditions of the site.
