Rotary Coring for Drillers

Rotary coring is a valuable method for collecting and studying geological samples, which can provide invaluable insights into subsurface conditions. This method, widely used worldwide, can be used to extract high-quality samples of both rock and soil, enabling accurate logging and comprehensive laboratory testing. However, the quality of the core can be compromised if not handled with care during extraction, storage, and transportation.
To address this, the instructional video has been launched by the British Drilling Association (BDA), offering clear, practical guidance on maintaining the integrity of core samples post-recovery. The video highlights essential equipment, techniques, and safety measures that ensure the core remains in optimal condition for analysis and design purposes.
Why Core Handling Matters
Rotary coring is a resource-intensive operation requiring expertise and precision. While many core samples are recovered in perfect condition, improper handling can render even the best efforts ineffective. The video underscores the importance of preserving core quality, which not only reflects the skill of the drilling team but also impacts the value of the data captured in reports, logs, and photographs.
Key Practices for Core Handling
The video walks viewers through the core handling process, starting from the moment the core barrel is brought to the surface. It emphasises the importance of using appropriate equipment, such as trestles to maintain barrel stability, and core liners to protect the core during extraction and storage. It also stresses the importance of:
• Core Box Selection: Boxes must be the correct size to prevent movement during transport, with lids that securely close.
• Labelling and Organisation: Clear labelling of the core and boxes ensures traceability and accurate identification of runs.
• Safe Transport and Storage: Cores should always be kept horizontal, protected from temperature extremes, and handled by at least two people to minimise manual handling risks.