Research on Lifting Technology of Underground Sliding Seal Ultra-Long Stroke Pumping Unit
In the middle and late period of oilfield development,with the increase of low production and low efficiency wells,the problem of lifting gradually appeared.Affected by the fluctuation of the liquid level,the lifting supply and discharge of the existing pumping unit were not coordinated,which couldn't guarantee the stable production of the oil well,and the lifting energy consumption was high,resulting in obvious energy waste.At the same time,frequent ineffective lifting of low fluid volume wells caused frequent problems of rod wear and breakage,which not only increased the cost of pump inspection,but also affected the normal production rate of oil wells.In order to solve these problems,a new type of lifting technology of downhole sliding seal ultra-long stroke pumping unit was developed,and the structural innovation and technical parameter optimization were carried out to solve the problem of frequent breaking of the conventional long stroke lifting wellhead flexible rod..Field tests show that the technology is simple,practical,with low cost and good application effect.
low production wellsliding seallong strokeconcentric double tubedeep pumping lift
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