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一钻孔岩层分层厚度的计算,比较常用的是平均采取率法。这种方法的结果,岩心长者计算的厚度大,短者厚度小,往往与实际情况不符。还有一种方法,它将回次分层中的底部一层按百分之百的采取率对待,即底部一层的岩心多长,分层厚度就多大,剩余的均为上层的厚度。此方法认为底部钻进时间最短,磨损小。但磨损小不等于没有磨损。
A hole drilling rock layer thickness calculation, more commonly used is the average take rate method. As a result of this method, the thickness of the core calculated by the elders is large, and the thickness of the short ones is small, which is often inconsistent with the actual situation. There is also a method that treats the bottom layer of the reclassification at a 100% take rate, ie how long the core of the bottom layer is, how much the layer thickness is, and the rest are the thickness of the upper layer. This method considers the bottom drilling time is the shortest, wear small. But small wear does not mean no wear.