Principles of cathodic protection technology for well casing
The damage to the wellbore structure of oil fields and water wells not only affects the normal production of damaged wells, but also affects the normal development of adjacent wells and even blocks, and poses a great threat to the stable production of the entire oil field. Oil well casing cathodic protection technology: There are two types of cathodic protection technology: sacrificial anode cathodic protection and forced current (impressed current) cathodic protection. Sacrificial anode cathodic protection technology: Sacrificial anode cathodic protection technology is to use a metal or alloy with a potential that is more negative than the metal to be protected to electrically connect with the protected metal, relying on the current generated by the metal with a more negative potential to continuously corrode and dissolve to protect other metal. As a sacrificial anode material, it must meet th...