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利用某些高分子聚合物凝固硬化快的特点，在地质勘探钻孔中进行堵漏和护壁，是解决复杂地层、减少孔内事故、提高钻进效率的有效途径之一。由于尿醛树脂原料来源较广，价格低廉，有一定堵漏效果，目前在国内外都在研究使用。尿醛树脂虽有一定的机械强度，但其性较脆，凝固后粘结岩石的能力不够强，作为一种堵漏物质是可取的，但要发挥其护壁作用，必须通过适当的处理，以提高其冲击韧性，才能收到更好的效果。我们的试验工作就是在上述情况下提出来的。经过几个月的摸索，取得了点滴成果，现分述如下。
It is one of the effective ways to solve the complicated formation, reduce the accident in the hole and improve the drilling efficiency by utilizing the characteristics of some polymers to solidify and harden quickly, and to plug and protect the wall in the geological exploration drilling. Due to the wide range of raw materials of urea formaldehyde resin, low prices, there is a certain plugging effect, at home and abroad are currently studying. Urea-formaldehyde resin has some mechanical strength, but its brittleness, the ability to bond rock after solidification is not strong enough, as a plugging material is desirable, but to play its role as a protective wall, must be through appropriate treatment to Improve its impact toughness, in order to receive better results. Our experimental work is put forward in the above circumstances. After several months of exploration, and achieved bit by bit results, are as follows.