Different Types of Wells

To the average person, a well is a well. It is a source of water for your everyday needs, like for laundry, drinking and cooking. But did you know there are several different kinds of wells? As a well drilling company serving Minneapolis, we thought we would educate you on the different types of wells, how they are made and what they are used for.

Drilled Wells

These types of wells are made by cable tool (percussion) or rotary-drilling machines. When well drilling these kinds of wells, they require the installation of casing as well as a screen that will prevent the inflow of sediment and collapse. The space around the casing has to be sealed with either neat cement or bentonite clay so the water will not be contaminated by water draining from the surface downward. These can often be drilled as deep as 1,000 feet below the surface.

Driven Wells

In order to construct these kinds of wells, a small-diameter pipe is driven into shallow water-bearing sand or gravel. In general, a screened well point will be attached to the bottom of the casing before the driving begins. Driven wells are usually simple and cost-effective to drill, but they are only good for tapping into shallow water and contamination is a concern because these wells are not sealed with grouting material during the well drilling process. These wells can be 50 feet deep (or more).

Dug Wells

These kinds of wells are dug by hand shovel. They are dug until they go below the water table and the water that is coming in exceeds the digger’s bailing rate, and they are usually lined with stones, bricks or some other material that will help prevent its collapse. While you can get water from less-permeable materials like fine sand or clay, they are shallow and lack continuous casing and grouting, which means they are easily contaminated as well. They can also go dry during a long drought.

For more information on well drilling in Minneapolis, call Hartmann Well Drilling at 952-458-2202 or get a Free Estimate.

previous post: Well Drilling 101: How to Become a Well Driller next post: Project Highlight: Geothermal Test Hole in Crystal MN