Theoretical Research and Simulation Experiment Analysis on Heat Transfer of Logging Tools
In order to ensure the deep development of oil exploration, improve the temperature and pressure resistance indicators of logging tools, and solve the problem of thermal failure of logging tools circuits, this article focuses on the theoretical research and simulation test analysis of heat transfer for logging tools. Based on the actual working conditions of logging tools, the influence of different factors on the average convective heat transfer coefficient is analyzed through a convection model between the logging tools and the downhole fluid. A heat transfer model for a straight fin heat sink is constructed, and the heat dissipation efficiency of the fins is calculated. The three-dimensional model of the logging tools is solved using finite element method, and the impact of different heat sink types on chip temperature is analyzed by conducting high-temperature experiments on logging tools. The results indicate that the average convective heat transfer coefficient of the fluid is positively correlated with the lifting speed of the logging tools, and it can be changed by adjusting the ratio of downhole fluid components. The high-temperature area of logging tools is mainly concentrated near the chip, and it should be considered to transfer heat to both ends of the logging tools to improve heat dissipation efficiency. The high temperature experimental test results are consistent with the simulation results of the heat sink, indicating that the arc-shaped fins heat sink has the best heat dissipation performance. Therefore, this article can provide theoretical guidance for thermal management of logging tools.
logging toolhigh temperature and high pressureconvection modelheat dissipation efficiencyarc-shaped fin
万方数据
维普
