Activation Sub
Max OD in:
4.567 / 5.236
Liner size in:
4.000 / 4.500
![B-series activation sub](/upload/iblock/987/z27bdf70x5xo3qvpbypjsppns309conv/%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%9A%D0%A6%20%28B-SERIES%20ACTIVATION%20SUB%29_item.png)
Max OD in:
4.500 /.5.000 / 6.260 / 7.913
Liner size in:
4.000 / 4.500 / 5.500 / 7.000
![M-series activation sub](/upload/iblock/eea/7xz32r967rhv7n2mjxe0r6vwn57aj9es/%D0%9C%D0%90%D0%93.2%20%28M-SERIES%20ACTIVATION%20SUB%29_item.png)
B-series activation sub is designed to provide circulation between completion toolstring and annulus. B-series activation 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.
M-series activation sub is designed to provide free circulation of the drilling fluid with а subsequent pressure-tight mechanical closing. M-series activation Sub is used in wells with liners of the corresponding size.