How to use packer in oil field?

1) Before the packer is put into the well, it is necessary to carry out well flushing;
2) Setting operation: after the low displacement operation, set the packer according to the design method;
3) Unsealing operation: hydraulic expansion packer and compression packer can automatically unseal after the oil sleeve pressure is balanced. Other packers designed to be unsealed have different ways of unsealing.