农用深机井多数用回转式钻机施工,现将施工过程中造成井孔偏斜的原因和防治措施介绍如下:一、井孔偏斜的原因(一)人为的因素1.安装方面(1)安装钻机时,天车、转盘和钻孔三者不同心,一开钻就偏离了规定中心;(2)钻机安装的不平稳、不牢固,钻进中产生位移,偏离原来中心;(3)钻塔基础 Most of the deep-well agricultural rotary drilling rig construction, the construction process will now cause the borehole deviation causes and prevention measures are as follows: First, the borehole deviation causes (A) of the human factors 1. Installation (1) installation Drilling rig, the crane, turntable and drilling three different heart, a drill off the provisions of the center; (2) rig installation is not smooth, not solid, displacement in the drilling, deviation from the original center; (3) Tower foundation