通过采用KTY4000型钻机和KPG3000A两种机型工程钻机成孔，排渣方式为气举反循环，以解决糊钻、PHP泥浆应用、钻机选型等问题。
The spread drill, application of PHP mud and choice of machine are solved by adopting two machines of KTY4000 and KPG3000A. Besides, the airlift reversing circulation is selected in slag discharge.
桥梁施工中为减少泥浆对桥位处的环境污染，尽量采用旋转钻机干法成孔。
In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible.
现简要分析利用地质钻机泥浆护壁成孔工艺完成深厚砂层中抗浮锚杆的施工工艺。
The technology of finishing float resisting anchor rod construction in deep sand layer with geological drilling rig slurry retaining wall technology is analyzed briefly.
提高全液压坑道钻机液压系统的技术水平，对于改善钻机整机性能及提高瓦斯抽采孔的成孔率具有重要意义。
It is significant to improve the hydraulic system for better performance of drilling rig and the higher ratio of finishing gas hole.
提高全液压坑道钻机液压系统的技术水平，对于改善钻机整机性能及提高瓦斯抽采孔的成孔率具有重要意义。
It is significant to improve the hydraulic system for better performance of drilling rig and the higher ratio of finishing gas hole.
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