我队在走向地质市场的初期，试用XB－1000A型岩心钻机采用89turn钻杆多级扩孔的方法进行水井施工，但由于岩心钻机输出速度高、扭矩小，故成井进度慢，施工效率低，而且钻机变速箱、立轴箱内的零件还经常严重损坏。1989年我们购买了一台XP－500型转盘配套XB－1000A型钻机，进行 In the initial stage of our team going to the geologic market, we tried to use the method of 89turn multi-stage reaming to drill the well, but because of the high output speed and small torque of the core drilling rig, the drilling progress slowed down and the construction efficiency was low. And rig gearbox, vertical shaft box parts are often severely damaged. In 1989 we purchased an XP-500 turntable supporting the XB-1000A drilling rig