在岩心钻探中，以往不论直孔或斜孔都要求按着开孔的角度打到终孔。这样就给实际工作增加了许多困难。实际工作证明，岩心钻探打斜孔时一般都有自然弯曲（即上漂），这种自然弯曲根据各地区的地质情况并不难找出它的规律。我们既然能找出钻孔自然弯曲的规律，我们就应当认真的研究掌握它和利用它。下面谈一谈几年来实际工作中利用钻孔自然弯曲的几点体会。 Drilling in the core, in the past, regardless of straight or inclined holes are required according to the angle of the hole hit the final hole. This has added a lot of difficulties to the actual work. Practical work has shown that when drilling a hole in a core, there is usually a natural bend (that is, floating). Such natural bending is not hard to find its law based on the geological conditions in various regions. Since we can find out the law of natural bending of the borehole, we should carefully study it and use it. Here to talk about the actual work in the past few years using the natural bending of drilling experience.