一、问题的提出大庆采油六厂自油田开发以来,一直采用单井双管热洗流程。投产初期油井热洗清蜡效果很好,到中含水期,洗井液经常压井,严重时造成停产,不得不将热洗井全部改上刮蜡片。到1985年大部分自喷井已改为抽油机井,油井流压已很低了,采用热洗清蜡,洗井液往往会注入油层,对油层出油影响很大。为了使油田生产继续保持高水平,不让洗井液进入油层,经研究,设计出一种既能保护油层又可节能的抽油井管柱。 First, the issue put forward Daqing oil production six plants since the oilfield development, has been using single well double pipe heat cleaning process. In the early stage of production, the oil well washes warm and waxed well. During the middle water-cut period, the well washing fluid often kills the well and causes serious production stoppage. All the hot wash wells have to be changed to scraping wax. By 1985 most of the self-injection wells have been replaced by pumping wells, oil well flow pressure is very low, the use of hot cleaning wax, wash fluid often injected into the reservoir, a great influence on the reservoir oil. In order to keep the oilfield production at a high level and prevent the fluid from entering the oil reservoir, a well-designed pumping string was designed to conserve the oil and save energy.