First TTRD well drilled from a floating platform-concept study to reality

The full-length paper describes the concept study, preplanning, and drilling of the world's first through-tubing rotary (TTR) -drilled well drilled from a floating platform. The full-length paper details the challenges of maintaining the integrity of the existing subsea well completion together with the specific bottomhole-assembly (BHA) requirements to drill in this highly depleted reservoir.