Drag bits

The trilam is generally used in soft, often sticky soils and is therefore more effective than a tricone in this type of formation. Tri-blades, and especially the stepped models, allow these soft soils to be cut well and thus offer better yields. Chevron trilams are used in more resistant soils where there is a risk of encountering stones/stone or even in soft rock (although less effective than a tricone in this case).

These tools can also be used as a dry drilling auger tool without injection, the thread being replaced by the appropriate hexagon connection depending on the augers used. They can give much better results compared to other auger tools (especially in comparison to finger tools).

USEFUL LINKS

• Tricone bits
• Fittings
• Rods
• Continuous flight augers
• Hollow stem augers
• Injection augers