Aqua Freed®

Water well restoration

Restoring the hydraulic efficiency of wells using CO₂

The Aqua Freed® process uses carbon dioxide in both liquid and gaseous phases to remove scale and blockages that impair the flow rate of production wells. Over time, filters and drains tend to become encrusted with mineral deposits, biofilm and iron-oxidising bacteria, or become blocked by the accumulation of fine sand and silt. The Aqua Freed® treatment restores the well’s pumping capacity, delivering tangible benefits such as reduced energy consumption and an increase in the amount of water available.

Restore

Well flow rate restored

Complete

Complete removal of deposits and blockages

CO₂

Natural, non-toxic CO₂ that leaves no residue

Removing scale with CO₂

CO₂ dissolved in water forms carbonic acid, which dissolves inorganic scale (converting carbonates into bicarbonates) and bacterial biofilm. The gas’s low surface tension aids penetration into crevices, dislodging deposits from the filter walls.

Deep and long-lasting treatment

Gentle on the well structure

The turbulence is achieved simply by the phase change of CO₂ from liquid to gas, without subjecting the well structure to excessive stress. The treatment is suitable for any type of pipework and filter and does not produce any waste water requiring disposal.

Carbon dioxide and the Aqua Freed® treatment in the field

Alongside the supply of carbon dioxide, SIAD offers a comprehensive well rehabilitation service, from the initial assessment of the well’s condition through to its return to service. Specialised technicians manage every stage of the treatment, ensuring that the well’s hydraulic efficiency is fully restored.

CO₂: the natural reactant

Carbon dioxide, in both its liquid and gaseous states, is a natural, non-toxic substance. It does not contaminate the groundwater and does not pose any problems regarding waste disposal, as it is naturally eliminated within a few hours of treatment.

How the packer works

Once the pump has been removed, the technicians lower a packer to the required depth. Its seal against the wellbore wall allows liquid and gaseous CO₂ to be injected both into the well and into the surrounding geological formations, where it acts at depth.

Restoration and return to service

Once the work is complete, the well is restored and tested, the pump is reinstalled, and the well is returned to service. Meanwhile, the synergistic action of the CO₂ has dissolved the scale and removed the fine materials that were blocking the drain and the aquifer.

Also for barrier wells and biogas extraction wells

The same system can be used to regenerate barrier wells and landfill biogas extraction wells, which are prone to blockages and scale build-up

Explore SIAD’s other water technologies

Gases and processes for water treatment and the remediation of contaminated sites

CO₂ treatments

Remediation of contaminated sites

MIXFLO®

Would you like to restore the hydraulic efficiency of your wells?

Our technicians analyse the condition of the well, determine the correct positioning of the packer and manage the entire Aqua Freed® treatment using carbon dioxide, from the removal of scale and blockages right through to testing and the well’s return to service.

Request a consultation