The Rotating Control Device may not always capture the spotlight, but it is absolutely central in high-stakes drilling operations. By providing a reliable seal around the drill string while enabling continuous rotation, the RCD supports safer, more efficient drilling especially in managed pressure drilling (MPD) and underbalanced drilling (UBD) scenarios. https://medium.com/@vertechsus/understanding-the-rotating-control-device-rcd-intelligent-rotating-control-device-2d4a2274bba7