一、前言目前，钻探工作中，为了防止孔壁垮塌和冲洗液漏失，在采用优质泥浆未能见效的情况下，一般处理的办法是：注入惰性材料（踞末、稻草等）。挤泥球、灌注水泥基的速效混合液，乃至下套管隔离。所有这些，往往不是难以达到预期效果，就是耗时太多成导致钻进成本增高。近年来，国外在应用化学物质特别是塑料护壁堵漏方面，进行了较多的试验研究工作，积累了不少成功的经 I. INTRODUCTION At present, in the drilling work, in order to prevent collapse of the hole wall and the loss of the flushing liquid, in the case of using high-quality mud failed to work, the general approach is to inject inert materials (straw, straw, etc.). Pour mud balls, quick-mixing cement-based infusion of liquid, and even the next casing isolation. All of this is often not difficult to achieve the desired effect, or too much time to lead to increased drilling costs. In recent years, foreign countries in the application of chemical substances, especially plastic wall plugging, conducted more experimental research, has accumulated a lot of successful experience