钻孔弯曲能使钻探效率降低,成本增加,容易造成事故。更重要的是,根据弯曲钻孔所取得的地质资料,达不到地质设计的目的,还会造成错误的地质结论。根据多年来大量钻孔弯曲资料统计,钻孔弯曲的方位大多是逆岩层倾斜方向,钻孔偏斜角一般是逐层增加,最后趋近于或等于钻孔中岩层的真倾角值。这说明地层产状是决定钻孔弯曲的重要自然因素。但是在人的合理的技术操作下,是可以控制在尽可能小的范围 Drilling can reduce the drilling efficiency, cost increases, likely to cause accidents. More importantly, according to the geological data obtained by bending the borehole, the purpose of geological design can not be achieved and erroneous geological conclusions can also be caused. According to the statistics of many drilling and bending data over the years, most of the drilling and bending directions are in the direction opposite to the rock strata. The deviation angle of the drilling hole generally increases layer by layer and finally approaches or equals to the true dip of the rock formation in the borehole. This shows that stratigraphy is an important natural factor that determines the bending of a borehole. However, under the reasonable technical operation of man, it can be controlled in the smallest possible range