Taking the main piping modification of the old pump room for brine extraction and transportation plant for example, this paper discusses the issues of using appropriate brine extraction pressure to increase brine yield and reduce the troubles of brine pump.

Bypassing the cavity bottom of Chang 5# Well,bore hole of Chang 5# Well successfully butts old cavity of Chang 1# Well and realizes brine extraction,which enhances the output and quality of brine by a large margin and increase ore recovery rate.

In drilling of directional-butted brine extraction well,saturated brine(edible salt)is not only the important guarantee for increasing the extraction rate of rock salt core and ensuring the quality of well struc-ture but also the safeguard against drilling accident in well caused by the oversize diameter in rock salt stra-tum.

There are large numbers of brine-extracted caverns which can be reconstructed as the nature gas storage in the exploited salt mine.

In order to speed up the construction of gas storage in the Yangtze River Delta and guarantee the stable operation of long-distance gas pipeline in the project of transporting gas from the west to the east,the institute studies the feasibility of 15 brine-extracted caverns in the chosen site.

This paper introduces the characteristics of three brine extraction processes in Yewu Salt Field.