井下气液混抽泵外特性试验研究

Experimental Study on Downhole Gas-liqud Pump

为满足高含气油藏及煤层气田开发的需要,对自主开发的新型井下螺旋轴流式气液混抽泵样机进行了外特性试验研究,得到样机在纯水及不同入口含气率时的外特性曲线,结果表明该样机能高效混抽高含气率介质。本文详述了试验步骤,分析了含气率和气液总流量的变化对井下螺旋轴流式气液混抽泵外特性的影响,为井下气液混轴泵的进一步开发研制提供了试验依据和工作基础。

To meet the needs of multiphase pumping in the high gas reservoir and coal-bed methane field, an experiment is carried out to study on the self-designed prototype of the new downhole helico-axial multiphase pump and its external characteristics. The characteristics curve of the prototype under pure water and different GVF conditions were finally obtained, and the result indi- cates this pump can be efficient in pumping high GVF medium. This paper describes detailed experimental steps and analyzes af- fection of the changeable void fraction to the external characteriatics of the multiphase pump. The analysis result provides materials for the further development and improvement of muhiphase pump .