Tool Introduction

The safety seal and naked eye packer form a safety seal packer. When the packer is seated, the sliding valve separates the upper and lower oil chambers, thereby locking the packer and ensuring that it is in a seated state during the testing process.

Structural characteristics

① A safety seal packer is composed of a safety seal packer and a naked eye packer;

② When the pressure difference between the upper and lower parts of the packer exceeds a certain pressure, the slide valve remains in a position where the upper and lower oil chambers are not connected, thereby exerting a hydraulic locking effect on the packer;

③ If there is a mechanical failure and the spring cannot fully open the slide valve, simply extending the stretching time can still release the packer.

operation

Lower the safety seal and naked eye packer into the predetermined position inside the well together with the pipe string, lower the pressure seat packer of the pipe string, move the safety seal sliding joint downwards, close the slide valve after opening the well, separate the upper and lower oil chambers, and lock the packer; After the test is completed, lift the tubing string for a few minutes, open the bypass valve, balance the pressure above and below the packer, move the slide valve to its original open position, and unseal the packer.

technical parameter