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反循环施工方法是工程施工钻进中一项比较先进的施工技术，在国外得到了广泛地应用。反循环施工法可分为三种：泵吸反循环、气举反循环、射流反循环。本文拟就普遍使用的泵吸反循环的施工工艺作一些探讨。一、供水方式与泥浆容器之容积1．供水方式。反循环施工中，为了保持孔壁稳定，避免塌孔，必须保持0.02MPa的静水压力。因此，务必保证有可靠的孔内供水。供水方式有两种：自流供水和水泵供水。水泵供水设备多，不易操作，而且不易保持水头的稳定；自流供水对保持水头的稳定最可靠，对孔壁的冲刷最小。因此，在条件许可的前提下，应尽量采用自流供水方式。
Reverse circulation construction method is a relatively advanced construction technology in construction drilling and has been widely applied abroad. Reverse circulation construction method can be divided into three types: pump reverse circulation, air lift reverse circulation, jet reverse circulation. This article intends to make some discussion on the commonly used pump suction reverse cycle construction technology. First, the volume of water supply and mud container 1. Water supply. Reverse circulation construction, in order to maintain the stability of the hole wall, to avoid cave-in, we must maintain the hydrostatic pressure 0.02MPa. Therefore, be sure to have a reliable water supply hole. There are two ways of water supply: gravity water supply and pump water supply. Water pump equipment, easy to operate, and not easy to maintain the stability of the head; gravity water supply to maintain the stability of the head of the most reliable, minimal erosion of the hole wall. Therefore, under the premise of the conditions permit, gravity flow should be used as much as possible.