工业和农业用的机井,虽然深度和结构有所不同,但经过多年使用,出水量都有程度不同的减少现象。最终有可能失去使用效能。事实证明,对于这样的机井,其中多数采用洗井措施,可以使其重新恢复使用价值,节省重建投资。目前国内外采用的传统冼井方法有:空气压缩机强力洗井;水压强力洗井;活塞洗井;液态二氧化碳洗井以及用盐酸、焦磷酸钠等化学药品洗井等。上述的洗井方法,有的只 Although the depth and structure of industrial and agricultural wells are different, after several years of use, the amount of water discharged varies to some extent. Eventually may lose the use of efficiency. Facts have proved that for such a well, most of them use well washing measures, which can make it resume the use value and save reconstruction investment. At present, the traditional methods of well washing at home and abroad are as follows: strong air washing of air compressors, hydraulic pressure washing well, piston washing well, liquid carbon dioxide washing well and chemical washing with hydrochloric acid and sodium pyrophosphate and the like. Above the well washing method, some only