固相颗粒在钻井筛筛面上运移的计算机模拟和试验

Computer simulation and experiment for the conveyance motion of solid phased particle on sieve surface of well drilling shaker

根据钻井筛动力学的基本原理 ,分析了钻井液中固相颗粒在非淹没状态下相对于振动筛面作后滑、抛掷、静止和前滑 4种运动状态的动力学条件。在考虑筛箱运动轨迹、筛面倾角、振动方向角、抛掷指数和钻井液粘附阻力等参数对固相颗粒运移影响的基础上 ,建立了固相颗粒运移速度和位移的动力学方程。按方程模拟计算得到的固相颗粒运移速度与实测值相比 ,误差小 ,吻合较好。综合分析认为 ,钻井液固相颗粒在平动椭圆筛上的运移速度高于直线筛 。

On the basis of kinetics' basic principle of well drilling shaker, the kinetic condition of solid phased particles in well drilling liquid,under the status of un-submersion,doing four movements as backward sliding, tossing, keeping motionless and forward sliding relative to the surface of vibrating sieve has been analyzed. On the basis of considering the influences upon the conveyance motion of solid phased particles affected by parameters of motive path of sieve chest, inclination of sieve surface,azimuth of vibration,throwing index and adhesive resistance of well drilling liquid etc.,the kinetics equations of conveyance speed and displacement of solid phased (particles were established.By comparing with the actually measured )value, the conveyance speed of solid phased particles obtained from simulative calculation of equations has les errors and a good coincidence. The synthetic analysis holds that the conveyance speed of solid phased particles of well drilling liquid moving on the level motioned elliptical sieve is higher then that on the linear sieve and the conveyance speed on linear sieve is again higher than that of circular sieve.