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(一)安装基台基枕周正,钻塔机械平稳,上下前后一条线,开孔角度要找准.安全严格检查,绝不马虎交工.(二)开孔机上余尺不要长,导管千万不能旷,主动钻杆切忌弯,必须紧固立轴箱.钻具对中好,粗径渐加长,转速要适中,压力轻轻上.(三)下套管井口套管及时下,挡住活石防坍塌.固定套管须对正,塞紧管壁防旷动.(四)换径钻孔换径带导正,导正接手对中精.小径要短导正长,一五之比较恰当.钻进六米卸导正,改长钻具归正常.
(A) the installation base abutment Zhouzheng, rig steady mechanical, up and down a line before and after the opening angle to be accurate .Strict safety inspection, never careless hand over. (B) Can not Kuang, the active drill pipe should not bend, must be fastened vertical shaft box. Drilling good, large diameter gradually longer, moderate speed, moderate pressure on. (C) under casing casing and timely, blocking live rock Anti-collapse collapse. Fixed sleeve to be positive, plug the wall to prevent Kuangkuang. (D) change the diameter of the hole with a guide, the guide is taking over the fine. The short guide is short, one-fifth of the more appropriate Drilling six meters unloading is positive, change the drill back to normal.