Eccentric Under Reamer

Eccentric Under Reamer is a special kind of downhole reaming tool. It can be installed in the drilling string to get a larger hole while drilling, which can ensure running the logging instruments, production casing or expandable packer completions in the hole more safely and smoothly.

Proven applications

Shale laterals;

Extended reach wells;

Creeping salts;

Swelling shales

Features

1. Eccentric shapes allows drilling larger hole than it passes through;

2. Forward spiral blades ensure protection, stability, and durability while enabling drillout;

3. Dual cutting structures allows forward reaming and back reaming;

4. Cleans the wellbore before expandable packer completions / running production casing;

5. Help eliminate / minimize micro doglegs;

6. Stirs cutting beds;

7. Eliminates delicated wiper trips.