Abstract:

By observing the change of foam state and oil temperature on hot oil surface, the influence factors of foam thermal stability and foam performance on oil temperature were studied. The test proves that the temperature of the oil determines the thermal stability of the foam. The critical oil temperature at which the foam stays on the oil is 125 ℃; when the oil temperature is higher than 125 ℃, as the oil temperature increases, the foam disappears faster and faster. The decrease rate of oil temperature is related to the temperature of oil, the foam drainage rate, and the viscosity of oil, but has nothing to do with the foam expansion ratio. The higher the oil temperature, the faster the foam drainage rate and the lower the viscosity of the oil, the faster the decrease rate of the oil temperature  

Key words: high temperature oil, foam, foam properties, expansion, 25% drainage time, foam stability