在地质勘探中,钻孔发生弯曲是一种普遍现象。为了比较准确而方便地定出孔内任何一点的空间位置,笔者在实践中总结出一种计算钻孔弯曲的方法——似螺线法。该法既可对已知弯曲钻孔进行计算,又可用于确定设计弯曲钻孔的孔口参数。本文只介绍对已知弯曲钻孔的计算。 In geological exploration, the bending of the borehole is a common phenomenon. In order to more accurately and easily determine the spatial location of any point in the hole, the author summed up in practice a method of drilling bending - like spiral method. This method not only calculates the known curved borehole, but also determines the orifice parameters of the design curved borehole. This article only describes the calculation of known curved boreholes.