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1 准备与成孔1.1 准备。钻机正式打眼之前,必须作好物料和现场准备。物料准备有井管、井盘、接头、滤料以及打眼和下管所需的一切材料。场地准备包括打眼的场地要平整,供水水源的确定,修筑送水垄沟和水池。准备工作完成后即进入成孔阶段,首先检查各类打井工具及钻机各个零件是否完好,钻杆是否弯曲,钻头的直径是否和要求的相符。立架时应注意的事项是:①为了避免钻机下面的垫板和地木梁产生不均匀下沉,地面必须平整、夯
1 preparation and preparation of holes 1.1. Drill before the formal drilling, we must make the materials and on-site preparation. Material preparation Well tube, well plate, fittings, filter media and all the materials required for drilling and down the tube. Site preparation, including drilling sites should be smooth, water supply to determine the construction of water ditches and pools. After the preparation work is completed into the hole-forming stage, first check all types of drilling tools and rig parts are intact, drill pipe is bent, the drill diameter is consistent with the requirements. Stands should pay attention to the following matters: ① In order to avoid uneven under the rig plate and ground beam sunk, the ground must be flat, ram