The Influence of Insulation Bushing on Insulation Performance of Vacuum Insulated Tubing Coupling

Abstract:

In the injecting steam wellbore, insulated tubings are connected with couplings. The coupling is short, but its insulation performance is poor. There are two different coupling types: couplings with insulation bushing and couplings without insulation bushing. By combining on-site experiments and fluent simulation, thermal insulation performance of coupling with insulation bushing and without insulation bushing were discussed. The results showed that the apparent heat conductivity of the coupling with insulation bushing is about 0.4W/(m•K), the apparent heat conductivity of the coupling without insulation bushing is about 3.6 W/(m•K). Insulation bushings promote insulation performance of vacuum insulated tubing coupling significantly.

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 1551-1554
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.1551
• Online since: May 2012
• Authors: Hai Qian Zhao, Zhong Hua Wang, Xiao Yan Liu
• Keywords: Bushing, Coupling, Insulated Tubing, Simulation, Thermal Insulation

References

[1] Mikang Wang. Determination of Heat Transfer Coefficient of the Insulated tubing injecting steam wellbore[J] . Petroleum Engineering, 1985,8(6):75-85 In Chinese

[2] Zhiguo Wang, Yitai Ma, Xinyao Xiang.Calculation Method of Wellbore Heat Transfer and Heat Loss During Steam Injection[J]. Special Oil & Gas Reservoirs, 2003, 10(4):38-41 In Chinese

[3] Hasan A R,Kabir C S. Heat Transfer During Two-Phase Flow in Wellbores Pare II---Wellbore Fluid Temperature[A]. SPE 22948, 1991.

DOI: 10.2118/22866-ms

[4] Hasan A R, Kabir C S. Aspects of Wellbore Heat Transfer During Two-Phase Flow [A]. SPE 22948, (1994)

DOI: 10.2118/22948-pa

[5] Xiaoyan Liu, Haiqian Zhao, Zhonghua Wang. Heat Transfer Experiment and Simulation of Vacuum Heat-insulation Oil Pipe Coupling[J]. Journal of Engineering Thermophysics, 2009,30(11):1895-1897 In Chinese

[6] Zhonghua Wang, Haiqian Zhao, Xiaoyan Liu simulation calculation of apparent heat conductivity of the coupling without insulation bushing[J]. Oil-Gasfield Surface Engineering, 2009,28(1):39-40 In Chinese

[7] Haiqian Zhao, Zhonghua Wang, Xiaoyan Liu, Zhiguo Wang.Research of Heat Loss Proportion of Heat Insulation Oil Pipe Coupling in Wellbore[J]. Science Technology and Engineering, 2010,10(11):2723-2727 In Chinese