钻探工程2024，Vol.51Issue(5)：59-67,9.DOI:10.12143/j.ztgc.2024.05.007
极地钻井液冷却用板式换热器设计及换热性能模拟研究
Design of a plate heat exchanger for cooling drilling fluid in polar regions and numerical simulation on its heat transfer performance
摘要
Abstract
It is of great significance to carry out subglacial bedrock core drilling in polar regions for studying subglacial geology,revealing the evolutionary history of ice sheets and evaluating future climate change.The temperature of the drilling fluid may rise above 0℃ after circulating at the bottom of the hole When drilling subglacial bedrock in polar regions,which may cause the wall of the icy hole to be melted during upward return,resulting in the instability of the wall,and even triggering the stuck drilling accident.It is necessary to design a drilling fluid cooling system that cooling the drilling fluid to a lower temperature before injecting it into the borehole,thereby keeping the drilling fluid below 0℃ at all times during circulation.The heat exchanger is the core component of the drilling fluid cooling system.The paper selects plate heat exchanger as the heat exchange component to cool drilling fluid,and uses the average temperature difference method to determine the heat exchange area and basic parameters,then numerical simulation of the heat exchange performance of the plate heat exchanger is using COMSOL Multiphysics 6.0 software.The research results show that the heat exchanger can cool the drilling fluid to-4～-3℃.Further,the simulation results show that the outlet temperature of the drilling fluid decreases with the decrease of the carrier refrigerant injection temperature and the increase of the carrier refrigerant flow rate,the type of drilling fluid has a great influence on the heat transfer performance of the heat exchanger,while the material of the heat exchanger plate has little influence.关键词
极地钻探/冰下基岩取心/钻井液/冷却系统/板式换热器Key words
polar regions drilling/subglacical bedrock core drilling/drilling fluid/cooling system/plate heat exchanger分类
地质学引用本文复制引用
王祖凡,李亚洲,杨甘生,张凯,王晋,周正..极地钻井液冷却用板式换热器设计及换热性能模拟研究[J].钻探工程,2024,51(5):59-67,9.基金项目
国家重点研发计划项目"南极冰下复杂地质环境多工艺钻探理论与方法"课题四"多工艺极地钻探装备研发与系统集成"(编号:2021YFA0719104) （编号:2021YFA0719104）
中央高校基本科研业务经费项目"可回收式热融钻具孔内融水与周围冰层传热机理"(编号:2-9-2021-017) （编号:2-9-2021-017）
