Our Anderreamer™ Lock-Closed (LC) underreamer operates in the most demanding downhole environments. The lockable mechanism deactivates the underreamer under specific downhole events including loss circulation and hole clean up and and offers you the option of drilling ahead with pilot hole size.


User-friendly – Compatible with all RSS types

Increased Reliability – Few seals and moving parts

Cutter Block Locking Mechanism – Enables safe shoe drilling