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has been cited by the following article:

• TITLE: Research on Temperature Distribution in Wellbore of Deep Well Drilling

  AUTHORS: Boyi Xia

  KEYWORDS: Deep Well, Drilling, Temperature Distribution, HAS

  JOURNAL NAME: Open Journal of Applied Sciences, Vol.11 No.12, December 16, 2021

  ABSTRACT: The wellbore temperature has an important effect on design and drilling of deep well. Based on energy conservation equations and actual drilling data of one deep well, the wellbore temperature distribution was simulated and the influence of different parameters on the wellbore temperature was revealed using the software of Hydraulics Analysis System. The results show that, while drilling, the mud temperature in wellbore gradually decreases from the formation temperature to the stable temperature, and it is higher than the mud inlet temperature on ground, the annular temperature is higher than the temperature in drill string, and the bottom hole temperature is higher than the ground temperature. The effect of geothermal gradient on wellbore temperature is great, while the mud density is negligible. The bottom hole temperature increases with the increase of mud inlet temperature, geothermal gradient, mud thermal conductivity and decrease of mud flow rate, mud specific heat and mud density.