Reliability Analysis of Annular Blowout Preventer Based on Fuzzy Relation Analysis

Abstract

This paper considers application of the fault tree method to analyze types and reasons for failure of an annular blowout preventer (BOP). In combination with fuzzy relation analysis theory, we have calculated the fuzzy importance of basic events which can lead to failure plus the correlation coefficient for the minimum cut sets. Consequently, we can obtain the degree of correlation between the top event and the minimum cut sets. We have determined the key factors influencing stable operation of the annular BOP. Our results can provide a theoretical basis for use and improvement of an annular BOP.