It is suggested that when formation pressure is lower than dewpoint pressure, circulating gas injection with maintenance of pressure can be used to enhance the recovery ratio of condensate.
建议当地层压力低于露点压力时，采用保持压力循环注气开采，可提高凝析油的回收率。
2
Back pressure higher than 80%, to row non-condensing gas, diaphragm solid, long life, easy maintenance, using a wide range.
背压率大于80%，能排不凝结气体，膜盒坚固，使用寿命长，维修方便，使用范围很广。
3
This article introduce the application of mobile rail gaspressure welding technology in the track maintenance of Shanghai Metro, and bring forward this technology is applicable and worthy to spread.