Choosing a wireline diamond core bit should begin with the rock formation rather than simply the bit diameter.
Two boreholes using the same NQ or HQ system may require different bit characteristics because the formations can behave very differently during drilling.
Soft formations can drill quickly, but highly abrasive rock may wear the bit matrix rapidly. A matrix with suitable wear resistance is required to prevent premature crown consumption.
Medium-hard formations often require a balance between diamond exposure and matrix durability. The objective is to maintain efficient cutting while allowing fresh diamonds to become exposed as the crown wears.
In hard formations, the matrix must wear at a controlled rate so that sharp diamonds remain available for cutting.
If the matrix is too wear-resistant for the formation, the bit can become polished or “glazed,” reducing penetration.
Broken and fractured ground creates additional challenges. Vibration, impact loading and unstable core conditions may affect both bit life and core recovery.
Professional bit selection should also consider:
Drilling rig
Rotation speed
Weight on bit
Core barrel size
Water flow
Hole depth
Required core recovery
YKDRILL supplies diamond core bits for geological exploration, mineral exploration, engineering investigation and deep-hole core drilling.
Available solutions cover multiple wireline and conventional coring systems for different geological conditions.
The correct bit is not simply the hardest bit available. It is the bit whose diamond and matrix characteristics work efficiently with the actual formation and drilling parameters.
