遵照毛主席关于“开发矿业”的教导,为了开发大屯煤田,在上海市委的指示下,在大屯煤矿工程指挥部的具体组织下,我市近100个单位以大会战的形式,在一年多的时间内就设计和制造成了NDI型竖井钻机。用此台钻机已经成功地钻成了第一口井—大屯煤矿主井,其钻径7.4米,钻深176.6米,成井质量达到了设计要求。经过一年多的钻井实践表明,整台设备性能良好,运转基本正常,为快速,保质、安全建井迈开了新的一步。一、钻井设备本钻机采用转盘——接杆方式、自重减压钻进原理进行钻进。整套非标准设备,按照竖井钻井的工艺特点,进行了重新设计,结构上作了不少改革 Following Chairman Mao’s teachings on “mining development”, in order to develop Datun Coalfield, under the direction of the Shanghai Municipal Party Committee and under the specific organization of the Datun Coal Mine Project Headquarters, nearly 100 units in our city, in the form of a general assembly battle, In more than a year, it has been designed and manufactured as an NDI shaft drilling rig. With this rig successfully drilled into the first well - Datun Coal Mine main shaft, the drilling diameter of 7.4 meters, drilling depth of 176.6 meters, into the well quality to meet the design requirements. After more than a year of drilling practice shows that the entire equipment performance is good, the operation is basically normal, for fast, durability, safety and build a well to take a new step. First, the drilling equipment The rig with turntable - post method, self-weight drilling principle of decompression. The whole set of non-standard equipment, in accordance with the shaft drilling process characteristics, has been redesigned, made a lot of structural reform