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    A mixed integer-programming model for periodic routing of special vessels in offshore oil industry

    , Article International Journal of Industrial Engineering : Theory Applications and Practice ; Volume 22, Issue 5 , 2015 , Pages 524-548 ; 10724761 (ISSN) Jahromi Eshraghniaye, A ; Yazdeli Roohollah, I ; Sharif University of Technology
    University of Cincinnati  2015
    Abstract
    In order to maintain the production of offshore oil wells, the National Iranian Oil Company periodically services facilities and equipment located in oil wellheads with mobile wellhead servants. It also gives technical supports to oil wellheads and mobile wellhead servants with supporter vessels. Due to supply limitations, there are not enough special vessels (namely supporter vessels and mobile wellhead servants) compared to the number of oil wellheads. The failure of special vessels to service oil wellheads and supporter vessels to technically support mobile wellhead servants based on a predetermined plan, will lead to considerable loss in production performance of oil wells and hence... 

    Multi-Depot Periodic Routing of Service Vessels with Time Windows (Case study: Oil Industry)

    , Ph.D. Dissertation Sharif University of Technology Ighani Yazdeley, Roohollah (Author) ; Eshraghniaye Jahromi, Abdolhamid (Supervisor)
    Abstract
    For offshore oil production, oil facilities should be continuously provided. The focus of this research is on the problems associated with a fleet of vessels from central depot(s) that are periodically utilized to serve wells and wellhead platforms with different demands and time limits. Iranian Offshore Oil Company, the largest offshore oil producer in Iran, was selected as a case study in this thesis. The main objectives is twofold. The first objective in the current study is to plan periodic routing of mobile wellhead servants and supporter vessels, as providers of general and technical services for the equipment on wellhead platforms. In some periods, the mobile wellhead servants require...