Jul 04 2016

Case Study: Expandable Drilling Reamer Completes Latin American Reaming Operation after 144 Circulating Hours

+ Drilling Services

In one trip, reamer enlarges 1,886m section from 9 5/8” to 10”

Ream tight spots over 683m in 12 ¼” hole, below the prematurely set casing shoe, before underreaming 1,183m of pre-drilled 9 5/8” hole to 10”, to section TD.

A customer in Latin America needed to underream a long predrilled 9 5/8” hole, but also had 688m of 12 ¼” rat hole that had partially collapsed below the prematurely set intermediate casing. The application would require the reamer to be robust, to maintain reliability through the unstabilised 12 ¼” section and allow it to attack the 200m sequence of large chert nodules 500m into the 9 5/8” hole. Obviously, the reamer needed to reliably deactivate once the operation was complete.


Run the Paradigm Expandable Drilling Reamer with Premium PDC cutters.


Using the Paradigm Expandable Drilling Reamer, the 683m of 12 ¼” rat hole was reamed without incident; other than noting regular torque spikes. The 1,183m of 9 5/8” hole was reamed out to 10” over 99 hours of drilling and 144 circulating hours.

Post-operational analysis of the run indicated the reamer performed perfectly, meeting all the operational objectives of the application and the customer successfully ran the liner. Upon inspection, the Paradigm Expandable Drilling Reamer with Premium PDC cutters was found to be fully functional, and the cutters dull graded just 1/32” undergauge.

Back to top