Working principle of crt top drive casing running

The working principle of crt top drive casing running is to fill the upper and lower oil chambers of the drive mechanism with oil through the top drive hydraulic source and boost it to the rated pressure, so as to drive the oil cylinder to move up and down and drive the slip mechanism to reset or open. According to relevant public information, the working principle of crt top drive casing running is that the upper and lower oil chambers of the driving mechanism are filled with oil through the top drive hydraulic source and boosted to the rated pressure, which drives the oil cylinder to move up and down and drives the slip mechanism to reset or open. Combining the advantages of top drive and casing drilling technology, the casing string can rotate, and mud can be lifted and circulated at the same time, thus realizing casing running into the bottom hole at one time.