Effective Water Well Rehabilitation Technology

Aqua Freed® — A Proven Success

aqua freed

As your water well ages, production, water quality and pumping efficiency will decline. These declines occur from minerals (iron, manganese, calcium. Etc.) and biological activity (iron related bacteria, sulfate reducing bacteria and slime forming bacteria) to become incrusted within the well screen, fracture apperature and pore space in the near well area. Once these deposits become significant you will most likely experience signs of discoloration, change in taste, odor issues, and “unsafe” (Total Coliform Positive) bacterial issues. However, with Aqua Freed®, removing plugging deposits and restoring water wells has never been easier!

Before Aqua Freed Treatment
(looking down into well)

after Aqua Freed (looking down water well)

After Aqua Freed Treatment
(looking down into well)

after Aqua Freed (water well screen)

After Aqua Freed Treatment
(view of side wall)


While conventional methods rely on the use of chemicals that are often dangerous to handle, difficult, and expensive to dispose of, the Aqua Freed® process relies solely on inert liquids and gasses that dissipate naturally. This state-of-the-art well rehabilitation process involves the use of carbon dioxide. The combination of gaseous and liquefied carbon dioxide with water creates both a chemical and physical energy that cleans the well of mineral deposits and other biological materials. Aqua Freed® has been used on a wide variety of wells including vertical and horizontal wells, collector wells, directional wells, angle wells, extraction wells, shallow and deep wells, and screened and open hole wells (fractured formations: limestone, dolomite, granite, sandstone, etc.)

Additional Benefits of Aqua Freed:

100% Environmentally Safe

Designed without harmful chemicals or acids.

Maximum Formation Penetration

Achieves penetration into formations at greater distances.

Highly Effective

Fully restores water well capacity and improves water quality.

Short Down Time

A typical Aqua Freed® rehabilitation averages between 5 – 14 days.


Cost-effectiveness design extends the life of the treatment beyond other methods.

Versatility of Use

Excellent for gravel pack wells, open-hole wells, horizontal collector wells, environmental monitor, and recovery wells.

Aqua Freed has the added benefit of CCUS (Carbon Capture Utilization Sequestration), thereby reducing your carbon footprint & handprint. STI has currently engaged a CO2 sequestration specialty consultant to further study the quantitative values, associated with reducing the carbon load, through the use of its technologies, thus helping mitigate climate change.

The Process

The Aqua Freed® water well cleaning and rehabilitation process uses gaseous and liquid carbon dioxide to restore water wells. Its biggest differentiator is the controlled injection of both liquid and gaseous carbon dioxide that’s used to regulate the feed rate safely and effectively penetrate the well into the geological formation surrounding the well.

Gaseous and liquid carbon dioxide contain tremendous energy, which results in the detachment, dissolution, and removal of sediments and encrustation from the surfaces within the well screen and surrounding aquifer. Get a closer look at the Aqua Freed® process below.

1. An Aqua Freed® personnel will study the well data to determine the correct placement of the packer to isolate the treatment zone. After the pump is pulled, the packer is lowered to the desired depth, creating a pressure seal to direct carbon dioxide into the well and surrounding formation.

2. Gaseous Carbon dioxide is injected through the packer into the well, penetrating the surrounding aquifer and producing a mild carbonic acid solution.

3. Liquified liquid carbon dioxide comes into contact with water, the reaction is the rapid expansion of the carbon dioxide within the aquifer. This works to achieve disruption and dislodging of biological and mineral deposits. By regulating the downhole pressure, liquefied CO2 is converted to a solid form of carbon dioxide. The ensuing sublimation produces ongoing energy of agitation.

4. After treatment, the well is mechanically developed and tested. The well pump is reinstalled, and the well is returned to service.

Restore Your Water Well & Pump With Subsurface Technologies!

Contact the experts at 845-567-0695 to transform the performance and quality of your water well and pump.

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