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[本刊讯]“松科二井”是我国目前第一深的科学钻探井。目前钻探口径为216 mm,地层岩性主要为灰白色石英砂岩与黑色泥岩互层,其中砂岩石英含量10%以上。进入4 900 m后,机械钻速只有0.5~0.6m/h,严重影响了工程的进度。中国地质调查局北京探矿工程研究所根据“松科二井”地层特点及工程需求,有针对性地对钻头胎体配方、切削及水力结构进行了优化设计,研制的直
[News] “Songke two wells” is China’s current deep first scientific drilling wells. At present, the drilling diameter is 216 mm. The stratigraphic lithology is mainly interbedded with the gray-white quartz sandstone and the black mudstone, with quartz sand content above 10%. After entering 4 900 m, the ROP is only 0.5 ~ 0.6m / h, seriously affecting the progress of the project. According to the stratum characteristics and engineering requirements of “Songke-2” of China Geological Survey, Beijing Institute of Prospecting Engineering, aiming at optimizing the formula, cutting and hydraulic structure of bit,