Purpose. Development of the method for calculating parameters of rock freezing process in cryogenic screen formation using a new innovative technology of elimination of the drilling liquid absorption in the well. Methodology. The tasks set were solved using analytical, experimental methods of thermal physics and heat and mass transfer. Theoretical analysis is based on an analytical solution of heat transfer problem in frozen semi-infinite cylindrical layer. Findings. The paper considers physical and mathematical statement of the problem. A mathematical model of heat transfer processes in rock massive under refrigerant impact was proposed. Temperature field dynamics in rocks is presented and relation of freezing time to frozen layer efficiency is studied. Analytical expressions for calculating the parameters of protective inverted cryogen screen formation in the absorptive horizon of a borehole are obtained. Originality. For the first time, the relation of the efficiency of the inverted cryogen screen (a frozen layer around rocks around a borehole) to the heat treatment time of the absorptive horizon of a borehole and refrigerant temperature was defined. Practical value. Innovative cryogenic technology of elimination of washing liquid absorption was developed. An analytical solution of heat transfer in rock at inverted cryogen screen formation around a borehole is obtained. Regularity of rock freezing time relation to inverted cryogenic screen width is established.

 Наукова періодика України 

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• Хоменко Олег Євгенович (1972–) (технічні науки)

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