Abstract: With the increment of horizontal wells, it gets more and more important to remove the sands and plug in the screens effectively. This paper presents a technology to perform this task with rotating water jets. In operation, the downhole devices will be laid down with tubings which will move up and down using the operation machine. Since the injection head can rotate in the determined speed, the rotating flow, compared with the conventional stable axial flow, can prevent the sands from depositing in the horizontal annular and washing the screen. The jet from high-efficiency jet nozzle will wash the screen directly with concentrated hydro-power. The working fluid can be clean water (or water injecting gas), without damage to the formation. The technology has been applied to four wells with the success rate reaching 100%. It has good economic and social effects.