关键词: 高含蜡, 胶凝油, 熔蜡, 屈服特性, 清管

Abstract: The gelling oil with high wax content can be used to simulate the wax deposit inside the pipelines. In this paper, a new yield stress measurement method for gelling oil with high wax content was presented. It has a wider measurement range compared to regular measurements. Thus, the yielding behavior of oilwax mixture in low temperatures was further studied. In particular, the effects of melting temperature, standing time in melting and measurement temperatures on yielding behavior were presented for oilwax mixture. It is found that high melting temperature contribute to a low yield stress. The yield stress of gelling oil increases with the increase in standing time in melting temperature. Within 5 h standing time, the yield stress is kept constant. In addition, the effect of standing time in measurement temperature on yielding behavior can be ignored. The yield stress remains basically unchanged while standing time in measurement temperature is more than 30 min. These conclusions are of great significance in preparing gelling oil with high wax content. It forms the basis for exploring the wax breakage and removal mechanisms during pipeline pigging.

Key words: High wax content, Gelling oil, Wax melting, Yielding behavior, Pigging