Circulation and Well Flushing System (Workover Fluid Circulation, Sand Washing, Well Flushing, and Well Killing Assembly) Unlike the drilling pump, the workover circulation system is centered on the triplex plunger workover pump, adapted to processes such as well flushing, sand washing, well killing, fluid displacement, circulation, plugging removal, paraffin removal, and wellbore cleaning. 1. Triplex Plunger Workover Pump (Workover Mud Injection Pump) A high-pressure