Precautions for Oil Casing Pipe Corrosion

What should be paid attention to when oil casing pipe is anti-corrosion?
1. First of all, we must do a good job in meeting water quality standards, and strictly test and manage water quality. Implement clean-up and separate injection, strengthen the cleaning of main water pipelines, ensure that the water quality in the station and bottom of the well meets the standard, and reduce the introduction of corrosion sources into the annular space;
2. For the injection wells that have been newly put into production, adopt the annulus protection liquid based on the addition of sterilization, and form a system to regularly add;

3. In view of the accelerating effect of mechanical abrasion on the corrosion of the oil casing, it is recommended to add a rubber ring to the tubing coupling or a centralizer at the serious position of the well slope to avoid the tubing from scratching the casing and the process of water injection. One side contacts the bushing;

4. In view of the serious corrosion of bacteria under scale and the slow growth and killing of SRB at high temperature, high temperature water or steam at 100 degrees Celsius can be injected into the annulus regularly to kill SRB under scale;

5. It is not recommended to promote the use of cathodic protection and coated casing until the corrosion in the casing of the water injection well is not effectively controlled.

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