Abstract: In order to realize the low filtration property for workover fluid in the solids free and not to form compact filter cake premise, prevent effectively or reduce the lock harm from workover fluid to the reservoir with low hole, low permeability, tiny throat and the developed fracture reservoir, and achieve the maximum of the fluid deliverability after well workover, the XJPS solids free and multi-purpose weak gel workover liquid system has been developed. This system has suitable rheology parameter, low filtrate volume (< 8 ml), high permeability restoring value (>85%) and effective flowback. After the system is applied to the Q3 gas well, the down range of gas and oil production and up range of produced water cut are both low. The fluid lock harm and producing capacity are all reduced obviously, and the reservoir protection effect and the workover efficiency are improved.