Devices and systems for drilling a wellbore

A drilling system for managing pressure within an annulus of a wellbore while drilling, the drilling system comprising:

• a managed pressure drilling system comprising:
• a derrick configured to suspend and rotate a drill string;
• the drill string suspended by the derrick within the wellbore and comprises a bottom hole assembly configured to cut into a subsurface rock;
• a managed pressure drilling choke configured to partially close to apply a back pressure on the wellbore to drill the wellbore using a managed pressure drilling technique;
• a blowout preventor installed downhole from a rotating control device on the wellbore;
• and
• the rotating control device configured to provide a managed pressure drilling flow path from the annulus of the wellbore to the managed pressure drilling choke, the rotating control device comprising:
• an inner seal assembly configured to be disposed around the drill string and comprising at least one pressure seal;
• an outer body configured to be operatively coupled to the blowout preventor and comprising:
• a primary cavity configured to receive, at least partially, the inner seal assembly, and
• a secondary cavity configured to direct fluid flow and comprising at least one ramping surface configured to minimize a pressure fluctuation,
• wherein the primary cavity and the secondary cavity are fluidly connected by a passageway therebetween;
• at least one outer seal configured to prevent fluid leakage between the outer body and the inner seal assembly;
• at least one outer bearing assembly configured to facilitate rotation of the inner seal assembly;
• and
• a fluid outlet fluidly connected to other equipment of the managed pressure drilling system configured to manage a wellbore pressure within the annulus of the wellbore.