Cathodic Protection Technology for Mud Circulation System Equipment

A sacrificial anode cathodic protection technology was desigred for the mud circulation system equipment in Jianghan oilfield. According to the resistance rate of salt water, aluminium anode was chosen as the feasible anode, and its specification, shape, installation position, service life and detecting techniques were investigated. By direct jointing or bolt fixation, field construction can be achieved. The results showed the average corrosion rate of the protected piece was less than 0.2 mm/a and the protection efficiency was about 80%, which can meet the needs of corrosion prevention.