CAJ | 학술논문

低温泡沫钻进技术除了具有岩心采取率高、钻进效率高和孔内事故少的特点之外，还具有低导热性、低热容量及对钻井孔壁的热干扰小等特点。低温泡沫系统由空压机、泡沫液罐、热交换器、泡沫发生器和参数监测系统组成。通过对泡沫液和空气制冷后，经发泡器混合后可获得低温泡沫。利用低温泡沫作为冲洗介质进行取心钻进，孔内返出的泡沫经消泡后，可再次循环利用。该技术在漠河盆地冻土井工程中进行了应用，经试验数据分析，低温泡沫对冻土层温度的影响极小，岩心采取率高，满足冻土层取心钻进工作的要求。
저온포말찬진기술제료구유암심채취솔고、찬진효솔고화공내사고소적특점지외，환구유저도열성、저열용량급대찬정공벽적열간우소등특점。저온포말계통유공압궤、포말액관、열교환기、포말발생기화삼수감측계통조성。통과대포말액화공기제랭후，경발포기혼합후가획득저온포말。이용저온포말작위충세개질진행취심찬진，공내반출적포말경소포후，가재차순배이용。해기술재막하분지동토정공정중진행료응용，경시험수거분석，저온포말대동토층온도적영향겁소，암심채취솔고，만족동토층취심찬진공작적요구。
Besides high core recovery of drilling hole, high drilling efficiency and few drilling accident, low temperature foam drilling technology has characteristics of low thermal conductivity, low thermal capacity and little influence to borehole walls.The low temperature foam system is composed of air compressor, foam liquid tank, heat exchanger, foam generator and parameter monitoring system.The low temperature foam can be obtained in foam generator by mixing cooled low-tem-perature foaming agent and air.While coring drilling with the low temperature foam as circulation medium, the returned foam can be recycled again after defoaming.This technology has been applied in frozen formation in Mohe basin.According to the experimental data analysis, the low temperature foam drilling technology has little effect on the permafrost tempera-ture, and high core recovery can meet the requirement of permafrost drilling.