It is proved that the anti-collapse function of the treating chemical in fluid kerite in piedmont drilling is more and more obvious, and the application is more and more widely.

沥青类在山前钻井中防塌作用越来越重要,用越来越广,但由于其基质沥青成分复杂性及由于各种改性手用,使沥青类室内评价指标与现场用效果越来越难以统一。