THERMAL INSULATION PERFORMANCE EVALUATION AND INSTALLATION LENGTH OPTIMIZATION OF INNER COATING THERMAL INSULATION DRILLPIPE Article Wenlong Li, Tao Xie, Kun Xu, Hongbo Huo, Lianpo Sun, Wenbo Li, Junxiang Wang, Yao Zhou Chemistry and Technology of Fuels and Oils. Vol. 59. 2023. P. 1003-1011