Abstract: Simplified models of drilling rig hoisting system with and without rigidi body displacement of drilling tool are presented.Preliminary analysis of the hook load variation are given.Generally speaking,the dynamic load of hook decreases quickly in the beginning and slowly afterwards,and its frequency is also changing.The average hook load in the acceleration period during hoisting is greater than that in the following period.Results calculated for some practical examples coincide with experimental data.

摘要： 本文对石油钻机起升系统动力学模型的简化进行了探讨,就钻具有刚体位移和无刚体位移两种情形建立了简化模型,并对大钩载荷的变化规律进行了初步分析.在一般情况下,大钩动载在起升初期衰减迅速,而后衰减缓慢,并伴有频率的变化,而且起升加速阶段的钩载均值高于后续阶段的钩载均值.应用作者编制的程序进行了实例计算,计算结果与实测结果吻合较好.

关键词: 系统动力学模型研究, 起升系统, 石油钻机, 钻具, 刚体位移, 气胎离合器, 初步分析, 后续阶段, 加速阶段, 大钩载荷