What problems should be paid attention to during the use of the annular blowout preventer?

What problems should be paid attention to during the use of the annular blowout preventer?

1. After the annular blowout preventer is installed on site, the zero seal test is generally not done, but the annular seal test should be done as required;

2. According to relevant regulations, try to close the blowout preventer and check the sealing effect. If the rubber core is found to be invalid or other problems, it should be replaced immediately;

3. No long-term shut-in operation;

4. When the annular blowout preventer is in the closed state, it is allowed to slowly move the string up and down, but it is not allowed to rotate the string;

5. It is strictly forbidden to release the casing pressure by slightly opening the annular blowout preventer; it is strictly forbidden to use the annular blowout preventer as a mud scraper;

6. When the well is closed and the drilling is forced, only the butt welded drill pipe joint with an 18 slope can be used;

7. After each opening, check whether the annular BOP core is opened to prevent damage to the annular BOP core;

8. Standard hydraulic oil should be used for opening and closing the annular blowout preventer, and attention should be paid to keeping it clean;

9. The oil pressure controlled by the sealing fluid should not be too large, and the maximum oil pressure controlled by the sealing fluid should not exceed 15 trillion Pa. The oil pressure controlled by the sealing fluid generally does not exceed 10:5MPa (10) The rubber core spare parts of the annular blowout preventer should be properly kept.