中高含水油井防偏磨水基润滑液的研制与应用

Development and Application of Anti-Eccentric Wear Water-Based Lubricant for High and Medium Water-Cut Oil Wells

为更好地延长中高含水期偏磨油井检泵周期,借鉴机械切削、磨削、拉拨、轧制和液压传动等领域广泛应用的水基润滑理论,以聚氧乙烯丙三醇硼酸酯硬脂酸酯、脂肪酸咪唑啉硼酸酯、两性表面活性剂SS-Z、聚氧乙烯烷基苯酚醚磺酸钠盐等为主剂,添加氟碳表面活性剂和维生素C合成了FYR-4水基润滑液。该润滑液体系中高反应活性的磷和氮、脂肪酸分子所形成的吸附膜和摩擦化学反应膜,具有优良的抗磨减摩性能和生物降解性。30余口油井的现场应用表明,油井日常维护中添加0.25%～0.50%的水基润滑液FYR-4后,检泵周期平均延长275d,应用效果良好,为中高含水期油井偏磨治理提供了新途径。

In order to greatly prolong the checking period of pumps for the eccentric-wear oil wells in the medium and high water-cut periods,a water-based lubricating fluid FYR-4 has been synthesized based on the water-based lubrication theory widely applied in the fields,such as mechanical cutting,grinding,drawing,rolling and hydraulic transmission.The water-based lubricating fluid FYR-4 takes polyoxyethylene glyceryl borate stearate,fatty acid imidazoline borate,amphoteric surfactant SS-Z,and polyoxyethylene alkyl phenol ether sulfonic aicd sodium as main agents,and with synergistic function of fluorocarbon surfactant and vitamin C,jointly forming chemical reaction film and adsorption film with boundary lubricant on the surface of tubing pipe and sucker rod.The adsorption film and tribochemical reaction film were formed by highly reactive phosphor and nitrogen,functioning as carrier fatty acid molecule in the system with good friction-reduction and biodegradability.By adding FYR-4 water-based lubricating fluid of 0.25%-0.50% to 30 oil wells for routine maintenance,their average checking period of pumps has prolonged by 275 days or even longer,providing valuable reference for the eccentric-wear management of oil wells in medium and high water-cut period.