Performance of dynamic safety barriers-Structuring, modelling and visualization

Abstract

The main objective of this master thesis is to discuss performance of dynamic safety barriers. A comprehensive literature review is performed in order to get understanding what dynamic safety barrier is. Three different concepts of dynamic safety barriers based on various meanings of dynamic were derived from the literature review: - dynamic safety barriers related to motion or physical force - dynamic safety barriers as updated barriers from dynamic risk analysis - dynamic safety barriers in the operations with dynamic complexity. Focus in the report is given to barriers in operations with dynamic complexity, where barriers vary over the time, the activation of the barrier depends on the current situation, there is no pre-made sequence of barrier activation and effect over time of interventions is not obvious. In this thesis dynamic safety barriers during drilling operational phase are discussed. Literature study on well operations was conducted and concepts such as well integrity, well control are discussed. Performance of dynamic safety barriers is discussed based dynamic safety on the examples of dynamic safety barriers in drilling- drilling mud and blowout preventer. Physical and actuarial approaches to reliability modelling of dynamic safety barriers are discussed. Strength- stress interference model of dynamic safety barrier, drilling mud is made.