Based on the theory of two-phaseflowpattern of gas and liquid, gas cut change can be detected with acoustic wave after gas flowing into wellbore.
基于气体侵入井眼后按气液两相流型分布的原理，利用声波可以早期检测到气侵。
2
This paper describes an experimental and theoretical research on the two-phaseflowpattern transition of downflow in vertical helical coils in an air-water loop.
本文对低压水-空气两相流动在立式螺旋管内向下流动的流型及其转变特性进行了实验和理论研究。
3
Research results show that the new method has good identification precision, fast identification speed, it is an effective tool for two-phaseflowpattern on-line identification.