潜油电泵机组变频电磁防垢除垢仪研制与试验

Development and Test of Frequency Conversion Electromagnetic Anti-Scaling and Descaling Instrument for Electric Submersible Pump Unit

在油田潜油电泵机组生产过程中,垢经常导致潜油电泵叶轮流道阻塞、泵效降低、油井产液量下降。本文通过对变频电磁场防垢除垢的机理进行分析,研制了一种适用于油田潜油电泵机组的变频电磁防垢除垢仪。在运行电流3 A、扫频频率160~240 kHz、线圈匝数30匝的最佳工艺参数条件下,室内试验连续运行20天,对碳酸钙(镁)垢和硫酸钙(镁钡)垢的阻垢率可达到90.17%;自油田现场投运以来,在未使用化学防垢剂和除垢剂的条件下,潜油电泵井的结垢量和结垢速率明显下降,机组连续运行时间提高了30%以上,有效实现了防垢除垢、延长机组运行时间、降低油田生产成本的目的。

In the production process of electric submersible pump units in oilfields,scaling often results in blockage of impeller passage and decrease of pump efficiency and fluid production in oil-wells.In this paper,based on the analysis of mechanism of anti-scaling and descaling by frequency conversion electromagnetic field,we develop a kind of frequency conversion electromagnetic anti-scaling and descaling instrument suitable for electric submersible pump units in oilfield.Under the optimum technological parameters of operation current 3 A,sweeping frequency 160~240 kHz and coil 30 turns,the inhibition rate of calcium(magnesia)carbonate scale and calcium(magnesia-barium)sulfate scale reaches 90.17%after 20 days’continuous test in laboratory.The oilfield application shows that the scaling amount and rate decreases significantly and the continuous operation time of the unit increases by more than 30%without chemical scale remover.The purposes of anti-scaling and descaling,prolonging the operation time of the unit and reducing the production cost of the oilfield are effectively achieved.