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(一)灵活掌握钻进压力:扭力正常时,压力要相应;阻力增大时,压力要减轻;减压还阻力,当时要提引;提引还阻力,马上要提升.(二)降下钻具套岩心,扩孔壁时,须要小心操作:套心扩壁,不能性急.轻压慢转,慢下勤提.(三)更换钻进方法:1.合金钻进换钢粒,操作千万要注意,使用小水小钢粒,轻压慢转扩孔壁.2.钢粒钻进换合金,操作格外加小心,换钻之前扫净孔,防止夹钻崩合金.
(A) a flexible grasp of drilling pressure: the normal torque, the pressure should be corresponding; resistance increases, the pressure should be reduced; decompression also resistance, at that time to mention cited; cited cited also resistance, to be promoted. With a set of core, reaming wall, you need to be careful operation: Concentric expansion wall, can not be impatient. Slow down gently, slowly under mentioning. (C) replacement drilling method: 1 alloy drilling for steel particles, Note that the use of small water small steel, light slowly turn expansion hole wall .2 steel drilling for alloy, the operation of extra care, change the hole before drilling to clean the hole to prevent the collapse of the alloy drill chuck.