【摘要】 为解决定向钻井工具单翼肋失效时导向力不能保持设定大小和方向导致的造斜性能损失问题，构建一种面向单翼肋失效工况的造斜性能优化模型。首先，构建“周期性导向力-井眼轨迹”模型，提出非稳态导向力作用下的轨迹计算方法；其次，建立外套旋转周期内轨迹终点偏差最小化模型，提出非稳态导向力作用下造斜性能评价指标；最后，采用改进麻雀搜索算法，动态调节剩余正常翼肋推力，显著提升外套旋转周期内导向力的作用效果，实现单翼肋失效工况下钻具在外套旋转周期内轨迹终点偏差最小化，有效补偿造斜性能损失。实验结果表明：当导向力≤50%最大值时，优化模型可在不起钻条件下基本消除轨迹偏差，完全恢复造斜性能；超过该阈值时，仍能显著降低性能损失，但随着导向力增大，降低幅度逐渐减弱。该优化模型能够有效减小单翼肋失效工况下钻具的造斜性能损失，具有良好的工程应用价值。更多还原

【Abstract】 To address the steering performance loss resulting from the inability to maintain preset magnitude and direction of guiding force due to single-wing-rib failure in directional drilling tools, a steering performance optimization model was developed for single-rib failure scenarios. A periodic guiding force-borehole trajectory model was established, along with trajectory calculation method under unsteady guiding forces. A minimization model of trajectory endpoint deviation within sleeve rotation cycles was developed, accompanied by a guiding performance evaluation criterion for unsteady guiding conditions. An improved sparrow search algorithm(ISSA) dynamically adjusted thrusts of functional ribs, effectively enhanced guiding force efficiency and minimizied trajectory deviations during sleeve rotation cycles. Results show that the model essentially eliminates trajectory deviations and fully restores steering performance under trip-free conditions when the guiding force is ≤50% of the maximum value. Beyond this threshold, it still significantly mitigates performance loss, but the mitigation effect gradually diminishes with increasing guiding force. This optimization model effectively reduces the steering performance loss of drilling tools under single-wing-rib failure conditions and demonstrates significant engineering application value.更多还原