向钻孔中定位下降钻具的现行的方法还是相当复杂的，并且要占去很多时间。所建议的向钻孔中定位下降工具的方法是简单的，有一些预先的准备工作与下降普通钻具时没有什么区别。按这种方法下降钻具是借助于以普通提引器为基础设计的特殊仪器来进行（图1）。 The current method of locating downhole tools in boreholes is quite complicated and takes a long time. The suggested method of locating the descent tool in the borehole is straightforward, with some advance preparation that is no different than when descending an ordinary drill. Dropping the drilling tool in this way is done with the aid of a special instrument designed on the basis of an ordinary indexer (Figure 1).