The Flushby unit is also called Rapid service rig(RSR),is multifunctional equipment mainly used for well flushing and sand washing in thick oil well, and performing quick workover service of shallow to a thick oil well. It is the next generation of service machine that outperforms service unit, pump truck and crane truck working together. the flushby unit shows the excellent performance in the oil well service.no matter in saving cost,or improving the efficiency, the flushby unit is better than conventioal workover rigs. Nowadays,the flushby unit becomes a "first call" or "first choice" option for workover work