Temperature distribution of fluids in a two-section two-phase closed thermosyphon wellbore  

作　　者：Zhang Yufeng Zhao Lun Fan Zifei Wu Xiaodong Fu Libing Xu Bifeng Kong Fanshun Jiang Shengdong 

机构地区：[1]Research Institute of Petroleum Exploration & Development [2]MOE Key Laboratory of Petroleum Engineering, China University of Petroleum [3]School of Energy Resources, China University of Geosciences [4]Exploration and Development Research Institute,Petrochina Daqing Oilfield Company [5]Northeast Petroleum University

出　　处：《Petroleum Science》2014年第2期287-292,共6页石油科学（英文版）

基　　金：the financial support from the National Natural Science Foundation of China (No. 50674096);PetroChina Scientific & Technological Risk Innovation Project (No. 060511-2-1)

摘　　要：Compared with a conventional single section two-phase closed thermosyphon （TPCT） wellbore, a two-section TPCT wellbore has better heat transfer performance, which may improve the temperature distribution of fluid in wellbores, increase the temperature of fluid in wellheads and even more effectively reduce the failure rate of conventional TPCT wellbores. Heat transfer performance of two-section TPCT wellbores is affected by working medium, combination mode and oil flow rate. Different working media are introduced into the upper and lower TPCTs, which may achieve a better match between the working medium and the temperature field in the wellbores. Interdependence exists between the combination mode and the flow rate of the oil, which affects the heat transfer performance of a two-section TPCT wellbore. The experimental results show that a two-section TPCT wellbore, with equal upper and lower TPCTs respectively filled with Freon and methanol, has the best heat transfer performance when the oil flow rate is 200 L/h.Compared with a conventional single section two-phase closed thermosyphon （TPCT） wellbore, a two-section TPCT wellbore has better heat transfer performance, which may improve the temperature distribution of fluid in wellbores, increase the temperature of fluid in wellheads and even more effectively reduce the failure rate of conventional TPCT wellbores. Heat transfer performance of two-section TPCT wellbores is affected by working medium, combination mode and oil flow rate. Different working media are introduced into the upper and lower TPCTs, which may achieve a better match between the working medium and the temperature field in the wellbores. Interdependence exists between the combination mode and the flow rate of the oil, which affects the heat transfer performance of a two-section TPCT wellbore. The experimental results show that a two-section TPCT wellbore, with equal upper and lower TPCTs respectively filled with Freon and methanol, has the best heat transfer performance when the oil flow rate is 200 L/h.

关 键 词：Two-section two-phase closed thermosyphon temperature distribution combination mode heat transfer performance 

分 类 号：TE93[石油与天然气工程—石油机械设备]