维修坏井,目前主要采用换管、补管、下套管、清淤等几种方法。然而,换管方法工艺复杂,施工困难。补管、下套管、清淤等方法,机井修复后,使用一个阶段旧病复发,难以从根本上解决问题。本文提出了对水泥管坏井,改造成四时硬质聚氯乙烯塑料 Maintenance of bad wells, the current main change pipe, fill pipe, casing, dredging and other methods. However, the process of tube changeover is complicated and the construction is difficult. Underpinning, the casing, dredging and other methods, wells repair, the use of a stage relapse of old disease, it is difficult to fundamentally solve the problem. This paper presents the cement pipe well, transformed into four-hour rigid PVC plastic