Circulation Sub
Max OD in:
4.567 / 5.236 / 5.748
Liner size in:
4.000 / 4.500 / 5.000
![Circulation sub](/upload/iblock/a7b/8ve28rkb0oc2vw746avknxdjxrd9ik49/%D0%9A%D0%BB%D0%B0%D0%BF%D0%B0%D0%BD%20%D1%86%D0%B8%D1%80%D0%BA%D1%83%D0%BB%D1%8F%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D0%B9%20%D0%B3%D0%B8%D0%B4%D1%80%D0%B0%D0%B2%D0%BB%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9%20%D0%9A%D0%A6%D0%932%20%28CIRCULATION%20SUB%29item.png)
Circulation sub is designed to provide circulation between completion toolstring and the annulus. Circulation sub is kept open while running the liner in а well to allow circulation through the tubing string. The sub is closed bу pumping а ball to indicate bump pressure.