Z-REAMER

Combining the advantages of a modern underreamer with a compact size, the Drillstar Z-Reamer opens up new reaming applications.

The simplicity and reliability of its design make it a reliable, cost-effective alternative to other modern underreamers.

Due to its much shorter length, it is now also possible to perform directional reaming-while-drilling using PDMs rather than a RSS BHA, even in the smaller borehole sizes and without compromising on steerability.

The Z-reamer is the first “block-type” PDC underreamer capable of enlarging up to one bit size up (about 50% of pilot size) even in the smaller diameters.
This unique feature enables the tool to be run in casing-while-drilling applications with even the smaller casing diameters (4 1/2 in. and up).