【摘要】 井筒内细长抽油杆柱是石油工程中特有结构,考虑旋转抽油杆柱可能在任意井深和井眼圆周方向上与井筒产生的碰撞接触,建立了旋转抽油杆柱动力学模型,并采用动力间隙元和空间梁单元、Newmark法进行仿真。经B3-4-P31等井的应用表明:通过仿真设计的抽油杆柱和扶正器安放位置,能够在井下安全可靠工作,避免了抽油杆柱发生脱断、偏磨事故。该方法已在大庆油田得到应用,也可以在其它油田推广应用。更多还原

【Abstract】 The slim rod string in well bore is a special structure of petroleum engineering. The dynamics model of rotating rod string is presented, with the consideration of the impact contact between rotating rod string and well bore which happened in any direction of well depth and well bore circumference. The simulation is carried out using dynamic gap element, space beam element and Newmark method. Applied to the B3-4-P31 well etc., it has been shown that the rod string design and the centralizer mount position to be used simulation can safely run in well down and prevent the rod string from failure. This method has been used in Daqing oil field, and can be widely used in other oil field.更多还原