FIELD: gas handling facilities. SUBSTANCE: invention relates to device and method used in heating of gas before reducing high pressure and after reducing. Proposed method of heating of fuel gas under high pressure before reducing the pressure comes to combustion of part of gas directly in gas containing reservoir. Heated gas is then expanded. EFFECT: high utilization of heat liberated at combustion of fuel gas as to ecological and technical characteristics without use of additional combustion device. 22 cl, 3 dwg
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