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

Multi-stage cement injector features:
1. The opening pressure is adjustable, and the opening pressure is not affected by well deviation.
2. The ring hole can be opened after touching and pressing, and the opening and closing actions are not without the problem of small liquid chamber pressure.
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 injury during tripping and drilling operations.
4. All materials are made of rubber/aluminum materials with good drillability. With anti-rotation mechanism, it is easy to drill and remove.
The Multi-stage cement injector adopts an internal closing structure with reliable sealing, the upper and lower sleeves can fall to the bottom of the well, and the internal accessories do not need to be drilled out, saving labor and time. The main features of the Multi-stage cement injector have been introduced here, and I hope it will be helpful to you.