DCFZ-D type two-stage cementing device for the internal closed structure, close the sleeve down and close the circulation hole.
Features
1. Open the pressure can be adjusted, and the opening action is not affected by the deviation.
2. After the pressure to open the circulation hole, open / close the chamber there is no liquid compression problem.
3. The inner diameter of the upper and lower fittings is the same as the inner diameter of the bushing, but less than the inner diameter of the closing bushing, effectively protecting the closing bushing from damage during the drilling and drilling operations.
4. All attachments are made of rubber / aluminum material with good drillability, anti-rotation mechanism and convenient drilling.
Technical Parameters