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与常规有杆抽油系统相比，套管泵采油系统取消了用来悬挂抽油泵并兼作出油通道的油管，利用空心抽油杆及实心抽油杆带动泵柱塞上下往复运动而抽油，以泵座以上的套管与抽油杆柱形成的环形空间作为出油通道。由于消除了油管柱的弹性伸缩，提高了泵效，可节省单井投资4－5万元，并减少油井检泵作业量和作业时间，延长热洗周期，减轻油层污染。在大庆油田5口油井中做了现场试验，套管泵泵座的坐封和下泵一次成功率均为100％，其中3口油井的泵效较高，平均泵效为77．2％，已累计增油2000t。
Compared with the conventional sucker rod pumping system, the casing pump oil extraction system cancels the oil pipe used to suspend the oil sucking pump and also serves as the oil passage, and utilizes the hollow sucker rod and the solid sucker rod to drive the pump plunger to reciprocate up and down. , The pump seat and the sleeve over the sucker rod column to form the annular space as the oil channel. As a result of eliminating the elastic stretching of the tubing string to improve the pump efficiency can save 4-5 million single-well investment, and reduce the oil well pump workload and operating time, extend the hot wash cycle, reduce oil pollution. Field tests were conducted in five oil wells in Daqing Oilfield. The success rates of setting and pumping of the casing pump base were all 100%. Among them, three wells had high pump efficiency with an average pump efficiency of 77.2% Increase oil 2000t.