16 Nov 2012

What is the well drilling process? PART 2

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Genesis 26:18-19 (KJV)

18- And Isaac digged again the wells of water, which they had digged in the days of Abraham his father; for the Philistines had stopped them after the death of Abraham: and he called their names after the names by which his father had called them. 19- And Isaac’s servants digged in the valley, and found there a well of springing water.

Well here at C&J Well Co. we drill instead of dig for water today, but the process is still largely the same.

We penetrate the earth’s surface until we find an aquifer that produces enough water for our customer’s needs and then develop this hole into a well.

So here’s how we drill a water well (see video below). Once we establish a good place to drill (click HERE to see the well drilling process part 1 post) we set up the drill rig and away we go. We start by putting a bit on the end of our drill tooling. We also flow water down through the center of the bit to carry our cuttings out of the borehole. Then we start to look for gravel after the first 25 foot of drilling. Anything shallower than 25 feet is not usable unless there is a variance obtained for such a shallow well. So we are primarily looking for sand and gravel. The sand and gravel acts as an underground conduit for the water. The water can’t flow through the clay, but it will flow through sand and gravel or a crack in the bedrock (which can also produce a good water well). Once we hit enough and the right quality of sand and gravel we proceed to turn the borehole into a well. We carefully measure the depth to the gravel, remove our drilling bit and tooling and install a screen attached to the end of our casing. Once the screen is lowered into the hole we have made in the gravel we then need to fill in the annular space between the natural aquifer and our screen. This is done by pouring a filtering sand down the borehole. Once this settles down to the bottom of the hole we begin the development process.

This process begins with blowing air into the casing with our drilling tools and an industrial powered air compressor. This air lifts the water out of the well. If everything goes well we then see fresh water from the aquifer coming out the top of our newly installed casing. We continue to blow air down inside the casing until the water coming out of the top of the well is clear and free of sediment.

After this takes place we then begin to pump pressure grout through a pipe that is attached to the outside of the casing. This grout is to fill the annular cavity between the borehole and the casing in order to keep surface contaminants from migrating down into the earth and your drinking water.

Now you are ready for a pump system of your choice and for C&J Water Treatment to install a softener and RO drinking water system. We will cover these two topics in a week or so.