According to this problem, casing oil stolen prevention sealing valve was developed, matching with down-hole oil-gas separator and gasliftvalve lift technology.
针对这一难题，研制了套管防盗油密封阀，并配套应用了井下油气分离器与气举阀助流举升工艺技术。
2
The gasliftvalve on the conventional gaslift pipe string is easy to fail and cannot be replaced in the hole.
常用的气举采油管柱存在的问题是气举阀易失效，不能投捞进行更换，严重影响管柱的效率和使用周期。
3
The gas lifting system is a narrow system extraordinary, including compressor unit, injection channel, liftvalve and lifting passage.