The Well Control Systems Subcommittee, under IOGP’s Wells Expert Committee (WEC), has carried out a systematic review of managed pressure drilling systems and components to identify opportunities for further improvements to existing standards and references. For those areas where potential gaps were suspected, the subcommittee has provided relevant existing standards and subsequent recommendations for members of the industry – particularly IADC’s Underbalanced Operations and Managed Pressure Drilling (UBO/MPD) Committee – to use as a guide for further discussion.