Maintenance and Anti Corrosion Measures of Oil Casing Pipe

Oil casing pipe is one of the important equipment for oil exploration, development and production, which can be roughly divided into: 1. surface casing; 2. intermediate casing; 3. production casing; 4. drilling casing. Due to different geological conditions, complex underground stress state, and a large amount of corrosive substances in crude oil, oil casing pipe is very prone to corrosion. Therefore, the maintenance and anti corrosion of oil casing are very important. The following are some common maintenance and anti-corrosion measures.

Oil Casing Pipe Maintenance:

Regular inspection and maintenance of oil casing pipe is of great significance to ensure the safe production and economic benefits of the oil field.

1. Regular cleaning

2. Coating Protection

3. Use abrasives

4. Keep dry

Oil Casing Pipe Anti Corrosion:

1. Strictly do a good job in water quality testing and management. Implement cleaning and separate injection, strengthen the cleaning of the main water pipe, make the water quality in the station and the bottom of the pool meet the standard, and reduce the corrosion space introduced into the annular space.

2. For the water injection wells newly put into production, the main sterilization and ring protection fluid should be adopted, and regular dosing of medicines should be formed.

3. In view of the role of mechanical wear in accelerating the corrosion of tubing and casing, it is recommended to add rubber rings at the tubing couplings or add centralizers in severely deviated wells to avoid contact between the tubing casing and casing side during water injection.

4. In the case of severe bacterial corrosion and slow growth of high-temperature SRB, it is possible to regularly inject 100°C high-temperature water or steam into the annular space to kill the SRB under the scale.

5. Before the corrosion of water injection well casing is effectively controlled, it is not recommended to promote cathodic protection and catalog casing.

6. A layer of oil anti-corrosion coating can be painted.The anti corrosion of petroleum casing pipe is mainly divided into:

1. Anti corrosion coating is painted on the outer wall.

2. Brush the anti corrosion coating on the inner wall.

3. Apply anti corrosion and cooling coating.

In short, oil casing is a very important equipment in the oil industry, and its maintenance and maintenance are very important. By adopting the above method, the service life of the oil casing can be ensured, and the production efficiency and safety of the oil field can be improved.