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钻压失真是钻探施工中常见而又不可忽视的问题。特别是在金刚石钻探中,常常由于钻压失真造成一些可以避免的孔内事故,损坏金刚石钻头、打丢矿心和孔斜等。孔底破碎岩石压力是通过钻杆传递的,钻压失真与钻杆关系密切。因此,本文主要从钻杆弹性变形,试谈钻压失真的问题。一、钻压失真的产生钻杆似一根承受综合作用力的长轴,在回转钻进中受力状态很复杂,因为钻探施工受许多难以测量和难以定性的因素控制,是一个很不稳定的过程。浅孔钻进时,承受外加钻压,深孔还要减压。钻杆除承受回转
Drilling pressure distortion is a common and non-negligible problem in drilling construction. Especially in diamond drilling, some borehole accidents that can be avoided due to drilling pressure distortion are often caused, and the diamond drill bit is damaged, the mineral core is lost, and the hole inclination is lost. The pressure of broken rock at the bottom of the hole is transmitted through the drill pipe, and the drill pressure distortion is closely related to the drill pipe. Therefore, this paper mainly discusses the problem of distortion of drilling pressure from the elastic deformation of the drill pipe. First, the generation of drilling distortion distortion drill rod like a long axis of comprehensive force, in the rotary drilling force state is very complex, because the drilling construction by many difficult to measure and difficult to determine the factors of control, is a very unstable the process of. When shallow holes are drilled, the drilling pressure is applied and the deep hole is decompressed. Drill pipe in addition to bearing rotation