我队钻进三叠系和侏罗系软硬换层频繁的易斜地层，79年开始使用反转钻进纠斜，效果见下表。从表中看出，采用反转钻进可以抵消和减弱地质因素对钻孔方位的影响，使钻孔方位改正幅度较大，钻孔顶角相对稳住或者比正转时减小，达到了预想目的，终孔斜度满足了地质要求（见下表）。 Our team got into triassic and Jurassic hard and soft layer frequently inclined layer, 79 years began to use reverse drilling oblique correction, the effect in the table below. As can be seen from the table, the use of reverse drilling can offset and weaken the geological factors on the impact of the drilling direction, so that drilling a large correction of the azimuth, the drilling angle is relatively stable or smaller than the forward rotation, reaching For the desired purpose, the final hole slope satisfies the geological requirements (see table below).