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在对比分析常规游梁式抽油机与异相型抽油机结构参数的基础上，提出将CYJ12－4．2－73HB型常规游梁式抽油机改造成异相型抽油机的具体方案：将常规机的曲柄、曲柄销和连杆，用12型异相抽油机的曲柄、曲柄销和连杆替代，并将横梁与游梁连接的轴承座前移。这样改造既解决了在用常规机配件供应匮乏的问题，又可节约可观的设备购置资金。现场使用情况表明，改造成的异相型机运行平稳可靠，冲程增加7％，相应提高了油井产液量和采油时率，并具有一定的节能效果。
Based on the comparative analysis of structural parameters of conventional beam pumping unit and out-of-phase pumping unit, it is proposed that the conventional beam pumping unit CYJ12-4.2-73HB be transformed into a heterogeneous pumping unit Program: The conventional machine crank, crankpin and connecting rod, 12 type heterogeneous pumping unit crank, crank pin and connecting rod instead, and the beam and the beam connected to the bearing block forward. This transformation not only solved the problem of lack of supply of conventional machine parts, but also save considerable equipment acquisition funds. The field use shows that the modified heterogeneous type machine runs smoothly and reliably, with a stroke increase of 7%, correspondingly increasing oil production rate and oil recovery rate and having certain energy saving effect.