North Sea HPHT case study: Monitoring of underreamer function status confirms in-gauge hole

摘要

UNDERREAMING TOOLS ARE FRE-quently needed in challenging applications, such as to facilitate running expandable liners, but underreaming operations can frequently leave uncertainty on final hole diameter. National Oilwell Varco (NOV) developed the IQ underreamer monitoring system to remove this uncertainty by monitoring cutter block position, wear and vibration, data that could be used in post-run drilling analyses as part of an optimization plan for future wells.