Abstract:According to the characteristics of high bottom hole temperature and large temperature difference between the inner and outer walls of reservoir casing in the process of underground coal gasification (underground coal gasification), the temperature field and stress field model of wellbore in gas production wells is established based on thermo-mechanical coupling, and the stress distribution of different steel grades of casing under limit working conditions is studied. The results show that: (1) under the condi… Show more
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