Water Well Drilling
Water well drilling is an age old method for reaching water held in aquifers. Those are underground layers of permeable rocks that hold water. Let's take a look at these wells and how they're drilled.
Most people are familiar with the standard water well. It's a long vertical shaft with an apparatus to lower a bucket into the shaft, or to pump water from the shaft. The bucket type well is often a hand drawn well. That's because the water is drawn out by hand. The simplest form of these include a bucket on a rope. The bucket is lowered or thrown down into the well. Then it's drawn up by hand. Some versions of this type of well include a mechanical assist. The bucket is drawn up by a crank, rather than hand over hand.
Water well drilling reaches the water held in those porous rocks. As a result the water contains more minerals than would be found in water from other sources. People who have drunk water from a well are familiar with the gritty texture of the water and the definitive metallic taste. Such water is often softened before use. That removes the minerals, some of which can be toxic in large enough quantities.
An automated form of mechanical well in use after the water well drilling, is a windmill driven pump. The power comes from the wind. It turns the windmill. The windmill drives the pump. The pump brings the water to the surface. This type of device has been around for a long time.
Water well drilling is made possible by simple gravity. Water seeps into the ground, pulled down by gravity. That's when it makes its way through the porous soil to the porous rocks. It settles in those pores, often between grains of sand, dirt and stone. Most of this originates as rain or snow. It accounts for about 20% of the fresh water used in the United States.
Water well drilling takes a number of forms. Dug wells are dug in the ground. They are often lined with stones to keep the well open. Driven wells are created by hammering a point into the ground. Pipes are attached to it. When water is reached a pump is installed. A drilled well can go much deeper. It is created by mechanical drilling, often rotary drilling.
Well, a water well drilling isn't quite as simple as people think. It can be a deep subject.