Abstract
The sensibility originated by the Blowout Preventer (BOP) theme, due to all attention gathered after the Macondo event, established a high level of requirements from regulatory agencies, clients and Drilling Contractors themselves. Based on these pillars, the concept of reliability has been constantly applied in the oil industry, especially in the Well Safety and Control System, where it is extremely important for the equipment to be reliable and operational when required. In parallel, the Condition Based Maintenance (CBM) and Prognostic Health Management (PHM) concepts, widely used in critical industries, which require high reliability levels, are being pointed out as the future for the BOP system management. Within this context, the purpose of this paper is to review the literature on Condition Based Maintenance and Prognostic Health Management, integrated with reliability concepts, and to enable them to be applied in the BOP health management. The paper identifies different concepts needed to support the main theme and, through research and selection criteria, it brings together a set of publications to obtain consistent theoretical framework. This research outlines important techniques used in high reliability industries and the way they can be applied on the BOP system and it also provides many useful references and case studies to assist on further development works in terms of well control and operational safety.
Highlights
Safety well drilling condition is the most important aspect to be considered during exploration and production of oil and gas
In order to ensure the control and safety of the well, offshore rigs are equipped with a Blowout Preventer (BOP) that makes possible the controlling of hydrostatic pressure and allowing the well to shut in case of unbalanced situation (Martins et al, 2015)
Considering the trends in the use of reliability concepts, the advance of real-time monitoring technology and the importance of BOP for drilling operations, this paper presents an extensive literature review on Condition Based Maintenance and Prognostic Health Management integrated with reliability concepts
Summary
Safety well drilling condition is the most important aspect to be considered during exploration and production of oil and gas. One of the biggest risks for operational safety is an uncontrolled influx of oil and gas from the formation to the surface, which means a blowout. Such round trip to repair the BOP would result in a cost of approximately US $1 million per event, turning into one of the most expensive downtime events (Shanks et al, 2003). This cost can be more expensive, due to ultra-deep-water operations and the complexity of BOP with more preventers and backups, needing more time to test all the system and to pull and run the BOP. Alme et Huse (2013, p. 1) showed that “Some estimates put the cost as high as US $ 1.2 million a day and beyond”
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