What do you mean by De-oxygenation tower?

The oxygen must be removed for the reason that it encourages certain bacteria to grow. If a bacterium grows in the oil it will block the absorbent rock in the oil reservoir. The filtered water drops into the de-oxygenation tower spraying onto different trays causing gases to be released. The gas is sucked out of the tower with space pumps and the water fills the bottom of the tower. The de-oxygenated water is taken by boosting pumps to the high pressure water inoculation or the injection pumps.