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在钻孔导斜过程中，一般说来都是能成功的，但有时也因失误而造成失败。现就导斜成败的原因作一粗浅的分析。一、导斜失败的主要原因（一）偏斜楔子的加工质量不符合要求，在地表又未进行认真地检查。（二）下钻时操作不当切断铆钉、楔子脱落后卡死在中途。（三）不按导斜程序进行操作，下到孔底的楔子没有安装好，没有卡紧卡牢，造成钻头骑在楔子头上，将楔子钻坏或转了向。（四）卡料投得太多，机上余尺算错，钻坏楔子头未发觉。
In drilling guide oblique process, generally can be successful, but sometimes failed due to mistakes. Now lead oblique success or failure of the reasons for a superficial analysis. First, the main reason for the guide ramp failure (A) the processing quality of skew wedge does not meet the requirements, and did not seriously examine the surface. (B) improper operation under the drill cut off rivets, wedges stuck in the middle after falling off. (C) do not follow the ramp program to operate, down to the bottom of the wedge is not installed, there is no tight clamp, resulting in bit riding on the wedge head, the wedge drill bad or turned. (D) card material cast too much, the machine is more than the wrong feet, wedges wedge head did not find.