TY - JOUR
TI - Design and strength analysis of the passive thermal insulation structure of a deep rock in-situ thermal insulation coring system
AU - Shi Xiao-Jun
AU - Li Jia-Nan
AU - Li Cong
AU - Wang Jiu-Quan
AU - You Zhen-Xi
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 623
EP - 630
PT - Article
AB - The zero-sum game between the strength of deep in-situ thermal insulation  coring structures and the performance of passive thermal insulation  materials seriously restricts the exploration and development of deep  resources. In this paper, an innovative thermal insulation coring structure  based on passive thermal insulation material is designed, and a strength  analysis of thermal insulation material is carried out based on the elastic  theory of multilayer cylinders, which reveals the stress distribution and  deformation law of thermal insulation material in a deep in-situ  environment. The reliability of the results is verified by comparisons  between the numerical simulation and theoretical derivation. The results  show that for deep coring environments of 150°C and 140 MPa, the wall  thickness and diameter of the corer can be greatly reduced by directly  coating the insulation material on the surface of the core barrel. This  paper can provide a reference for the design and engineering application of  deep rock in situ thermal insulation coring systems.