Coring is to obtain samples of different rock types.

Coring is the technique most often used for geological fieldwork.

The assembly used for a core drilling crown consists of :

– a sleeve reamer

– a corer (to retrieve the sample),

– the rod and the drill itself.

Alternatively, is possible to use of a Triplex sheath (plastic liner) to better retain the core.

Depending on the type of application, the tool used can be

– a  diamond ring impregnated or set stones

– a PDC (polycrystalline diamond) ring or carbide crown.

Each tool has its own data sheet that indicates the best application based on the type and hardness of the geological formation encountered.