Jul 04 2016

Case Study: Expandable Drilling Reamer Completes North Sea Reaming Operation After 78 Circulating Hours

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In one trip, reamer enlarges 933ft section from 6 ½” to 7 ¼"


In a Rotary Steerable BHA, underream whilst drilling a 900ft section from 6 ½” to 7 ¼” under arduous drilling conditions, through a tightly interbedded limestone formation, with a continuous 900ft sequence of chert nodules.

A customer in the North Sea needed to underream a section greater than 900ft under challenging conditions. The application would require the reamer to be robust, activate after drilling the casing shoe track and then underream whilst drilling 70° hole, for at least 900ft. Obviously the tool 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, a 933ft section was enlarged from 6 ½” to 7 ¼” over 36 hours of drilling and 78 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.

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