在稳态拉力—扭矩模型的基础上 ,考虑海底大位移井井眼轨道和钻柱的特点 ,建立了用于监测海底大位移井钻柱与井眼摩擦系数的数学模型 ,提出了判断井眼清洁程度、井眼光滑程度、压差粘卡程度、缩径、坍塌、键槽等复杂状况的方法。 Based on the steady-state tension-torque model, considering the characteristics of borehole orbit and drill string of the large displacement submarine seafloor, a mathematical model for monitoring the friction coefficient between the drill string and wellbore in the large-displacement submarine well was proposed. Cleanliness, smoothness of the borehole, the degree of pressure sticking, shrinkage, collapse, keyway and other complex conditions.