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液力反馈型空心杆抽油泵在一定程度上缓解了抽油杆下行困难的问题。对流量和光杆载荷所作的分析表明 ,这种泵会大幅度增加上冲程悬点载荷 ,同时大幅度减小泵的流量
Hydraulic feedback hollow rod pump to some extent alleviate the difficulty of pumping rod down the issue. Analysis of flow and polished rod load shows that this pump significantly increases the load on the upstroke and drastically reduces the pump flow