The article analyses the reason of downhole corrosion and wear, shows the destinguish method of downhole corrosion and wear and puts forward measures to retard corrosion and wear in rod pump well.

• 分析了油井井下腐蚀和磨损的产之原因，阐述了井下腐蚀和磨损的鉴别方法，提出了减缓有杆系井腐蚀和磨损的措施。