When gas flowvelocity in a wellbore is less than a critical gas flowvelocity maintaining continuous flowing back in a gas well, a liquid carrying phenomenon occurs in the gas well.
当井筒内气流速度低于维持气井连续排液的临界气流速度时，气井出现携液现象。
2
This paper describes six practical working models of gravity cage and evaluates the flowvelocity of the inner point and outer back point of the cage net under the condition of pure current.