油管磨损量的试验研究及预测

Experiment Research and Prediction of Tubing Wear Volume

油田现场有杆抽油井杆管偏磨日益严重,为预防并减少井下事故,有必要对油管磨损量进行预测。利用自主研发的摩擦磨损试验机,模拟油田生产的实际工况开展了杆管偏磨试验,得到了多种工况下的油管磨损量,验证了硬质合金扶正器的防磨效果;同时分析油管在不同工况下的磨损规律,并结合偏磨引发的油管失效案例,推导出了油管磨损量的预测模型,且该模型的准确性和可靠性得到了本试验结果的验证。该研究成果可为油田采取科学有效的油管偏磨防治措施提供理论依据。

The eccentric wear of sucker rod in pumped well has become increasingly serious in oilfield,to prevent and decrease down hole accidents,it is necessary to study the prediction model of tubing wear volume. This paper utilized self-developed friction and wear test machine,the sucker rod and tubing eccentric wear experiment was carried out under the actual working condition of oilfield,the corresponding tubing wear volume were obtained under different working conditions, the effect of cemented carbide centralizer was verified.The wear law of tubing was also analyzed,combining with the tubing failure cases caused by eccentric wear, the prediction model of tubing wear volume was derived, and the accuracy and reliability of the model was verified by the results of the experiment.This research results provide theoretical basis for oilfield eccentric wear of sucker rod taking scientific and effective control measures.