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    Experimental and Simulation Study of Barite Settlement Phenomenon under Static and Dynamic Condition

    , M.Sc. Thesis Sharif University of Technology Movahhedi, Hamed (Author) ; Shad, Saeed (Supervisor) ; Hosseini Mokhtari, Zahra (Co-Advisor)
    In petroleum related drilling, Barite particles settling and Barite sag as major problems in drilling wells can potentially impose significant operational issues. In this study, a computational fluid dynamics (CFD) and experimental investigation of Barite settlement in annular space were conducted in both static and dynamic conditions. The Euler-Euler approach was used to model the multiphase flow of solid Barite particles and drilling fluid. In this approach, the momentum lost between phases has been taken into account by means of particle-particle and particle-fluid exchange coefficients. The governing equations were numerically solved using finite volume method by CFD software package... 

    The Feasibility Study of Micronized Powder Plant for Exporting (UNIDO METOD)

    , M.Sc. Thesis Sharif University of Technology (Author) ; Hooshmand, Mahmoud (Supervisor)
    This thesis deals with the development of a hypothetical micronized powder factory and trying to test and engage in this hypothetical development of the following plant, it considers following factors:
    1-Domestic & International market
    2-Plant location
    3-Plant design & development
    b.technology & equipment
    c.human resource
    4-raw material
    5-shipping & transport
    To evaluate above factors the UNIDO methodology is used in this research work. The UNIDO methods are using a process by which feasibility studies of production facilities or plant are base on. After reviewing a variety of factors, ranging from financial... 

    Modeling and simulation of barite deposition in an annulus space of a well using CFD

    , Article Journal of Petroleum Science and Engineering ; Volume 161 , 2018 , Pages 476-496 ; 09204105 (ISSN) Movahedi, H ; Shad, S ; Beagom Mokhtari Hosseini, Z ; Sharif University of Technology
    Elsevier B.V  2018
    In drilling industry, barite particles settling and barite sag as a major problem can potentially impose significant operational issues. Static conditions, in which well undergoes an extended shut-in period, could occur during different drilling and completion operations such fishing operation, tripping, and logging. Despite its importance, such phenomenon is not well understood yet. To avoid issues related to barite settlement and barite sag, a good understanding of the impact of different drilling parameters on barite settlement and sag phenomenon is required. Recently, the mathematical formulation and modeling of settlement and sag processes have gained more attention. In order to better...