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

1. After the ring blowout preventer is installed on site, the zero seal test is generally not done, but the ring seal test should be done according to the requirements;

2. According to the relevant regulations, try to close the blowout preventer, check the sealing effect, and replace it immediately if the rubber core fails or other problems are found;

3. No long-term well closure operation;

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

5. It is strictly forbidden to release the casing pressure through the micro-open ring blowout preventer; It is strictly forbidden to use ring blowout preventers as scrapers;

6. When the sealing is forcibly drilled, only 18 slope butt welding drill pipe joints can be used;

7. After each opening, check whether the ring blowout preventer core is opened to prevent damage to the ring blowout preventer core;

8. The opening and closing of the annular blowout preventer should use standard hydraulic oil, and pay attention to keeping it clean;

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