水平定向钻进曲线段造斜强度分析

Analysis of Angle Buildup Strength to Horizontal Directional Drilling's Curved Section

弯强作为水平定向钻进曲线段设计中的一个关键参数,设计时如果采用较大的弯强,则可以减少造斜进尺、缩短钻进距离、节省工程施工费用;但弯强过大将会造成钻具的磨损加剧,甚至钻具不能顺利过孔以及钻杆折断事故等等诸多的不利因素。为解决这一突出矛盾,通过对曲线段作为铺管段时、保证钻具顺利过孔以及钢质钻杆柱安全工作的三个因素运用数学力学计算方法进行综合分析和计算,得出了曲线段设计的极限弯强,并在盐碱地改良项目施工中得到了验证。

Bending strength as a key parameter in the design of horizontal directional drilling curved section,if in the design there is a larger bending strength applied,we can reduce the footage for angle buildup,shorten the drilling distance and save the project construction cost; But large bending strength will cause the wear of drilling tools increased,even the drilling tools can't pass the hole smoothly or the drill pipe would be broken etc.. In order to solve the prominent contradictions,in case of taking the curved section for pipe laying,to ensure drill passing smoothly and the security of steel drilling bar,these three factors are analyzed by mechanics calculation method and the limitd bending strength of the curve segment is obtained and it is verified in saline-alkali soil improvement project construction.