Corrosion of
oil casing
1. First, do a good job of water quality standards, strict testing and quality management. Dispensing implement remediation, cleaning work to strengthen the main water pipe, so that the station, the bottom water quality standards, reduce corrosion source into the annular space;
2. Have been put into operation a new water injection wells, mainly taken in dosing sterilizing annulus protection fluid, and institutionalized, regular dosing;
3. In view of the mechanical abrasion on the casing pipe corrosion in acceleration, proposes to add a rubber ring on the pipe coupling or inclination serious parts plus a centralizer, avoid water during operation and during the tubing and casing scratches contacting one side of the casing;
4. In response to severe corrosion and scale down bacteria SRB slow growth and high temperature to kill the case, may be periodically injected into the annulus to 100 degrees Celsius temperature water or steam to kill the dirt under the SRB;
5. Before injection wells within the casing corrosion has not been effectively controlled, is not recommended to promote the use of cathodic protection and coating sleeve.
