反循环钻进技术的实质在于循环液流上升速度高，携带岩屑能力强。具有钻进效率高、钻头寿命长、成井质量好、节省辅助时间和减轻劳动强度等特点。为此，许多国家广泛采用了这种工艺方法。近年来，我国不少单位亦对气举反循环钻进方法进行了研究试验，并取得了一定效果，但终因无合适钻具影响了这项新技术的推广。 The essence of reverse circulation drilling technology is that the circulating fluid flow has a high rising speed and strong debris carrying capacity. With high drilling efficiency, long bit life, well into the well, save time and reduce labor intensity and so on. To this end, many countries have adopted this process widely. In recent years, quite a few units in our country have carried out research on the reverse circulation drilling method of gas lift and have achieved some results. However, the end result of the unsuitable drilling tools has affected the promotion of this new technology.