水文井钻探施工中几种钻进方法的比较

Methodical Comparison of Water Well Drilling Construction

结合施工过的水井实例，介绍了水文水井钻探施工中常用的钻探工作类型：回转钻进．冲击钻进及冲击回转钻进。其中回转钻进适合于砾石粒度小于80-100mm的地层，冲击钻进要求小于200mm的砾石总量不能超过50％．且地层均匀，而冲击回转钻进适合于含大漂石地层。在钻探施工中应根据具体工程地质条件．选用水井配套设备，并对施工中常见的钻进事故，提出了相应的解决办法。

Through ease studies of water well construction, introduced commonly used techniques in water well drilling： rotary, percussion and percussion rotation drilling. In whieh, rotary drilling is suitable to strata with pebbles grain-size 〈 80-100mm, percussion drilling requires total amount of pebbles 〈 200mm not exceed 50%, and strata uniform, while the percussion rotation drilling is suitable to strata contain boulders. During eonstruction, aeeording to concrete engineering geological condition select water well associated faeilities, put forward eorresponding measures to solve eommonly happened drilling accidents in construction.