Subsea pipelines incidents prevention: A case study in Brazil |
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Institution: | 1. UFRJ, Brazil;2. ANP, Brazil;1. Université de Lorraine, CNRS, LRGP, Nancy, France;2. INERIS, Parc Technologique ALATA, BP 2, F-60550, Verneuil-en-Halatte, France;1. School of Safety Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China;2. Key Laboratory of Mine Safety and High Efficient Mining Jointly Built by Province and Education Ministry, Anhui University of Science and Technology, Huainan, Anhui 232001, China;3. College of Safety Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China;1. Laboratoire de L’Ingénierie de La Sécurité Industrielle et de Développement Durable, Institut de Maintenance et de Sécurité Industrielle, Université Mohamed Ben Ahmed Oran 2, Sécurité Industrielle et Environnement, Oran, 31000, Algeria;2. Laboratoire Matériaux LABMAT, Ecole Nationale Polytechnique D’Oran- Maurice Audin, Oran, 31000, Algeria |
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Abstract: | There are more than 4000 subsea pipelines in Brazil. These pipes include umbilicals, drilling risers, flexible risers, rigid risers, hybrid risers, flowlines, and export pipelines. Despite all standards, regulations, guides, and risk management tools designed to avoid events, subsea pipeline incidents still occur, revealing possible failures in companies' risk control. Identifying similarities between different subsea pipeline failure events is crucial to improving the design, risk management practices, and regulation requirements, besides promoting accident prevention. This paper proposes applying the life cycle and management practices combined to analyze subsea pipeline incidents from the RDI (Detailed Incident Report) and investigations reported to ANP (Brazilian National Agency of Petroleum, Gas, and Biofuels), the Brazilian safety regulatory agency. Furthermore, subsea pipeline incidents data were analyzed: correlated circumstances, consequences, and causes. The results show that most riser and flowlines causal factors are related to equipment failures, and recurrent root causes are design errors and integrity control. Based on the proposed approach, it was possible to identify gaps in most riser and flowlines accident investigations since there are few causal factors, root causes, and the absence of riser and flowlines failure mode and mechanisms. Therefore, the development of accident recommendations can be compromised. Thus, this paper proposes improvements to current Brazilian regulations to clarify the minimal subsea pipeline accident investigation requirements. |
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Keywords: | Oil and gas pipelines Accidents analysis Safety Regulation |
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