Welcome to our getting started document, designed to convey what we need, why we need it, all in an effort to fulfill your needs – predictable outcomes. We wish it were as easy as filling a tank full of gas. We’re dealing with so many variables which you’ll see below in our rehab algorithm – 7 categories, 19 sub categories and then 14 total deciding factors.
We not only have the need for information that ranges as critical, important and added value, but we also have to convey the processes, procedures, tools and safety requirements to the organization that is chosen to do the work. This isn’t just another well rehabilitation program. We are using very aggressive chemistry, processes and procedures that require equipment, technique, special tools for the well and the conditions, to render the most effective and longest lasting outcome.
The removal of scale and what they call metallic oxides is an easy task for Well-Klean© descalers. The removal of biomatter is a technique, as is the amount of chemistry and type, application techniques, cleaning procedures and soak times, while balancing the amount of energy the casing may handle, to offset chemical requirements.
Ground Water Constituents (not casing water or casing sludge)
Down Well Video
Type of Well - Potable or not - Extraction, Injection - Vadose, ASR, Artesian - Geothermal
There are some basics about every well you should know. Most wells get sick at about 14 years of age and by sick we mean performance becomes problematic. Most wells get sick from being colonized by bacteria, bacteria forming colonies over perforations blocking water flow.
Some wells get sick from the deposition of scale, and in some cases there is a combination of biology and scale. HCT has determined how to tell from the ground water, whether the well is likely sick from biology or scale, or perhaps leaning towards one side or the other. We also know there are two major forms of bacteria in the well, iron reducing and sulfate reducing. Note they are both “reducing”, meaning they degrade iron and sulfur.
They also degrade steel, which then can be a concern for casing integrity and perforation sizes to withhold filter pack. We’d also like you to know that perhaps the worst things you can do to your well are brushing it without the presence of adequate biocide or disinfection, and trying to clean a well with some form of chlorine which is a minor, temporary solution.
If you see elevated levels of iron or sulfur in your water, or your hot water has begun to smell, odds are you have an infection of sulfate reducing bacteria from a sick source of water, perhaps the bottom segment of a water well which can easily transfer to your hot water heater.
Here are some of the things we are looking for and why:
Drillers Log – Mainly casing alloy, age, perforation type and potential durability of the well to incorporate physical activity for more robust cleaning. Example, stainless wire wrap screen versus steel wire wrap screen. We can also observe perforations and filter pack size for potential perforation gap deterioration.
Well Diagram – Casing diameter, depth, perforation locations, standing water level, how much fill will be present versus total depth of the well.
Ground Water Constituents – Can this water scale or not, if so, how much biology in the ground water is using minerals to form nodules - if so what type of bacteria? How long, and what is the potential of casing and perforation deterioration. We can get insight from just a few water parameters. The water sample is to come from the ground water, not from water that has been sitting in the casing.
Calculate Langelier Saturation Index
Sulfur or sulfate
Calculate Total Bacteria Exponent
Video – Downhole video is valuable, where the video report is much less valuable. The gradient water flow needs to be observed to define the ability to place chemistry in the well and retain it. Otherwise, with gradient flow we may need to tremie between plungers. In most cases we can observe the density of the biomatter to help define the amount of chemistry and or energy needed (plunging, brush type, bursting, chemical retention) and the aggressiveness of the tools used in an effort to increase efficiencies.
Rehab History – The primary question here is has energy been used directionally forcing biomatter into perforations and filter pack. If so, it is likely biomatter has been moved deeper into the filter pack, which will take a lot of energy and chemistry to reach and remove. Bacteria isn’t the main challenge – it is breaking down its polysaccharide, a protective membrane also used for attachment and shedding acids, disinfectants and improperly applied bio dispersants.
Potable or not – Disinfection and disposal procedures vary between potable and non-potable water wells where disinfection is not necessary and disposal can be placed onto arroyos and crops (with dilution).
Water Analyses, Assessments & Recommendations, what’s wrong with the well, what needs to be done and how it needs to be done, can cost from $800 to $4,400.
Preparing the Scope of Work runs from $300 to $4,000.
Chemistry needed depends on the amount of debris and size of the well, diameter and depth, how much energy we can use offsetting casing integrity to reduce chemical demand. Offsetting chemistry efficiency to labor hours.
Processes, procedures, equipment.
Permits, disposal and completion services all play a role.
Education and training.
We take the position you want, the optimum cleaning for the most long-lasting durable results and therefore try to not under-estimate what is necessary.
Ballpark cost – just can’t do it. Think about the differences between a steel versus stainless versus PVC well. There are just too many variables.
To learn more, request our Best Practices document.
Download the Word doc to fill out and send back