Oil casing is a steel pipe that used to support the oil and gas well wall

　　Oil casing steel grade: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc.. The end of the casing processing forms: short round thread, long thread, buttress thread, special buckle etc..

　　Anticorrosion measures of oil casing

　　1 . First do a good job of water quality standards, strict water quality testing and management. The implementation of the clean water injection, to strengthen the main water pipeline cleaning work, so that the station within the bottom of the water quality standards, reduce the erosion of the introduction of ring space;

　　2. On the newly put into operation of the water injection well, take to add the sterilization based annulus protection liquid, and the formation of the system, regular investment plus;

　　3. In view of the mechanical abrasion of oil casing corrosion acceleration effect, it is recommended in tubing hoop with a rubber ring or add a centralizer in the severe deviation location, to avoid in the operation process and the process of water injection tubing scrape injury casing and contacts to one side of the casing