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本文应用纵横弯曲梁理论,研究了井眼曲率,钻铤反弯矩,近钻头扶正器等十项参数对井下钟摆钻具和刚性满眼钻具扶正器位置的影响问题,并给出了相应的计算方程。文章指出,WoodsLubinski计算方法只适用于斜直井内的钟摆钻具计算,而Hoch及其修正公式,由于未考虑钻铤反弯矩,近钻头扶正器等一系列因素,而未真实地反映井下状况,用来计算刚性满眼钻具亦欠妥当。
In this paper, the influence of borehole curvature, anti-bending moment of drill collar and near-bit centralizer on the position of downhole pendulum drill and rigid full-bore drilling tool centralizer is studied by using the theory of vertical and horizontal bending beams. Calculate the equation. The article points out that the Woods Lubinski calculation method is only suitable for the calculation of pendulum drilling in a vertical well. However, Hoch and its correction formula do not reflect the underground conditions because it does not consider a series of factors such as the anti-bending moment of the drill collar and the near-bit centralizer. , Used to calculate rigid eye drill is not properly.