钻井液振动筛固相运移动力学分析

在推导钻井液振动筛按圆、直线和平动椭圆三种运动轨迹振动方程的基础上，分析了钻井液固相颗粒在非淹没状态下相对于振动筛面做后滑、抛掷、静止和前滑四种状态下的运移动力学条件，即固相颗粒速度和位移的动力学方程。按方程仿真计算得到的固相颗粒运移速度与实测的运移速度相比，相对误差小于15％，吻合较好。综合分析认为，钻井液固相颗粒在平动椭圆振动筛的运移速度高于直线振动筛，在直线振动筛上的速度又高于圆型振动筛。

Dynamic analysis of solids conveyance of shale shaker

On the basis of the basic principle of dynamics, the kinematics behavior of solid particles on drilling fluid shaleshaker is studied. In consideration of the effect of various parameters on solids conveyance, the solids conveyance modelis developed. The dynamic model provides a method for studying the effect of various shaker parameters on solids conveyance off the screen, and it is also helpful to the optimum design of shale shaker. By means of simulation calculation,the influence of various parameters such as vibrating pattern, throwing index, tilting angle of screen and vibrating frequency on solids conveyance is discussed. For a given shaker, the soids conveying speed can be predicted by the model.All of these are valuable and can provide theoretical basis for the design of shale shakers.