The Multi-stage cement injector is an internal closing structure, which opens the circulation hole through the pressure difference of the liquid, and the closing plug drives the closing sleeve to go down to close the circulation hole.

Precautions for using Multi-stage cement injector:
1. Used for casing cementing with well deviation less than 25 degrees.
2. Throw the plug to open the circulation hole.
3. After closing, the accessory slides to the bottom of the well without drilling out.
4. After the accessory slips off, the full diameter of the pipe string can be realized.
Multi-stage cement injector product features:
1. The opening pressure can be adjusted, and the opening action is not affected by the well deviation.
2. The circulation hole can be opened after bumping and pressing, and there is no small cavity liquid compression problem during opening and closing actions.
3. The inner diameter of the upper and lower joints is consistent with the inner diameter of the casing, but smaller than the inner diameter of the closing sleeve, which can effectively protect the closing sleeve from damage during tripping and drilling operations.
4. All accessories are made of rubber/aluminum materials with good drillability. The Multi-stage cement injector manufacturer tells you that it has an anti-rotation mechanism, which is convenient for drilling and removing.