卡点深度计算中消除摩阻力影响的方法

Eliminating Disturbance of Drag to Sticking Depth Calculations

国内外现有的卡点计算作业方法和计算公式都不可能消除摩阻力的影响,有的计算公式甚至会增大摩阻力的影响。所以现有方法对于垂直井钻柱来说虽然可行,但对于摩阻力很大的定向井钻柱来说,则是很不准确的。分析了传统卡点深度计算方法的原理,指出了现有国内外文献所述方法的具体问题所在。通过分析思考,给出了基本可以消除摩阻力影响的卡点计算作业方法和计算公式。

The disturbance of drag between drill-string and well-bore can not be eliminated using the available methods of calculating the depth of sticking point, some even increase it. All the existing methods are only useful for vertical wells but not for directional wells due to the serious drag. The method and formula of calculating the depth of sticking point which eliminates the disturbance of drag were given in this paper.