Results are examined of experimental studies of cavern formation in loose sands cemented by ice. The new data obtained make it possible to have a substantiated plan for the indicators of the flushing fluid and its chemical treatment. Results are presented of studies of argillaceous solutions chemically treated and untreated, as well as water and diesel fuel. Comparison of the findings with the technological indicators of the argillaceous solutions indicated that with an increase in viscosity of the solution and its content of clay powder, the rates of ice destruction diminish. It was established that with a rise in viscosity, there is also an intensification of the ice destruction rate, if the rise in viscosity is accompanied by increase in water-output of the flushing fluid. It is namely the water-output of the flushing fluid which is one of the universal indicators for the suitability of the flushing fluid for drilling under the examined conditions.