Near-bit GaugePro Echo digital reamer eliminated rathole trip, saved customer 36 rig hours and $2.1 million USD Challenges • Deepwater application with several types of hard, abrasive formations • Narrow pore pressure window and risk of casing collapse • Reduce reaming rathole without tripping for a dedicated hole opening assembly • Set casing shoe as close as possible to TD Results • Drilled 12-1/4 in. pilot hole by 14-1/2 in. expandable concentric reamer to TD and reamed remaining rathole in one run • Eliminated 155 ft (47.2 m) of rathole, reducing rathole length to only 21 ft (6.4 m) without having to make a dedicated reaming trip • Reamed 3.5 hours at 44.3 ft/hr (13.5 m/hr) • Saved 36 hours of rig time equaling $2.1 million USD • Resulted in higher than expe

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