煤层气井新型螺旋轴流式混抽泵设计

针对煤层气井排采中含有气体与煤粉的特点,专门设计了泵的增压单元,并且采用压紧式叶轮结构,有效延长了泵的工作寿命。对样机进行室内试验研究,给出了该泵的外特性曲线,结果表明在入口含气率在40%左右时,样机的最高效率达到了40%,单级扬程2.6 m,该泵对高含气率的多相流体混抽效果明显,对煤粉固体颗粒不敏感,在煤层气开采中具有较好的推广应用前景。

Design of New Helico-axial Multiphase Pump for CBM Wells

A new type of helico-axial multiphase pump for CBM wells was designed.Considering gases and coal fines in CBM wells,a key compression unit was designed and a new kind of compression impeller structure was designed for the new helico-axial multiphase pump which effectively extend the working life of the pump.A test bench was built and many experiments was conducted.The characteristics of the experiment results were given as well.The results show that the efficiency the prototype reached 40% and the head reached 2.6 m when the inlet GVF is 40%.The new pump is good in multiphase pumping and has good prospect of application and extension in coalbed gases exploring.