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利用模拟岩屑分别在淡水、ＣＭＣ钻井液以及用于德国大陆超深井的ＫＴＢ钻井液中进行了沉降实验并测定了岩屑的沉降速度。观测到两种不同的沉降方式─—稳定沉降、摇摆沉降。岩屑的沉降方式与岩屑的雷诺数有关。当岩屑的雷诺数小于１００时，岩屑稳定下沉；反之，雷诺数大于１００时，岩屑摇摆下沉。通过实验测定的数据建立了新的岩屑沉降阻力系数及沉降速度的计算模型。
Sedimentation experiments were carried out using simulated cuttings in freshwater, CMC drilling fluid and KTB drilling fluid for the ultra-deep well in the German mainland, respectively, and the settling velocity of cuttings was determined. Two different settlement methods were observed ─ ─ stable settlement, rocking settlement. The settlement of cuttings is related to the Reynolds number of cuttings. When the Reynolds number of cuttings is less than 100, the cuttings settle down steadily; on the contrary, when the Reynolds number is more than 100, the cuttings sank and sank. Based on the experimental data, a new model for calculating the drag coefficient and settling velocity of cuttings was established.