Well Control Incident

A well control incident is in drilling & completion and live well intervention defined as a failure of barrier(s) or failure to activate barrier(s), resulting in an unintentional1 flow of formation fluid –

  1. into the well
  2. into another formation or
  3. to the external environment.
  1. A planned flow is not a well control incident (for instance DST, mini DST etc.).

Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards

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