HUC is a condensed polymer of sulfonated humic acid and hydrolyzed polyacry-lonitrile .It can be used in formation of hole collapse .

• 针对大庆油田榆树林地区开发井所钻地层造浆严重,井壁易大段剥落、坍塌等问题,在易塌井段钻井液选用抗高温降滤失剂HUC进行处理。