Water well casing is used when a well reaches its final stages of completion. Drilling a well entails cutting through layers of rocks and earth until the technicians can reach the source below. However, simply drilling the well is not enough. The sides of the well have to be supported so that the vertical walls do not tumble in.
The water well casing is a kind of protective layer set inside the well’s drilled walls and prevents sediments and seeping sludge from mixing with the water in the reservoir. You can buy water well casing puller in the USA from various manufacturers and make sure they conform to the states’ regulations.
Here is a brief overview of water well casing work.
What are the Various Functions Of the Water Well Casing?
There are several essential functions of the casing.
- First, it can hold the unconsolidated soil and stones in a place that forms the vertical inner wall of the well. While the soil, rocks, and stones of the drilled area are pulled up, it is crucial to ensure that the sides of the wall do not cave in. The casing also acts as a framework so that the rest of the pumping mechanism can go on unchecked.
- Secondly, the casing prevents surface water and groundwater from entering the well and contaminating the water. For preventing surface water from entering the well, the casing can extend above ground up to 30 centimeters. And where the walls of the well are precarious, consisting of loose particles like sand and gravel, the casing might run throughout the entire length and sides of the well.
- You may opt for a partial casing near the top if there are sturdier and firmer rocks like basalt and shale lining the well. However, it is good to have at least an 18-foot long casing in any conditions to cover all ends. You need a water well casing puller in the USA to conduct the job flawlessly.
- On the other hand, another purpose of the casing is to prevent the water from mixing with any other pipes or lines running on the other side of the well. This is especially important in the case of a gas or oil line. The casing, in this case, is often made of steel that runs along the inner line of the well. The gap between the other side of the well and the soil is sealed with cement.
How is the Casing Set?
The casing is divided into various sections. Each section is about 40 feet long, and the joints are screwed together. They form long stretches of the casing, known as casing strings. They are protected on the ends by a thread protector, which secures them till they are ready to be joined.
There are male threads on each end of the casing, and female threads are used to join to make joint ends with the help of a collar made of a short and cylindrical steel pipe. Lastly, a thread compound on both ends creates a tight seal.
How is the Casing Installed?
The casing runs from the rig floor. It is connected at every joint by casing elevators on the traveling block. The subsequent casing is embedded or stabbed into the previous casing inserted in the wall of the well. Likewise, the joints are fixed one after another. Casing tongs help at this point, and they hand above the drill floor. They help in screwing the casing joint to the casing string.
Once the weight of the casing string is transferred to the casing hangers, and they can bear it, the casing has been installed. The hangers are located at the top of the well. The casings are suspended from them with the help of slips.
A guide shoe, a rounded section of the pipe with an open hole on end, connects the first casing with string and guides the casing crew into the well. You can also buy well-casing torch guides in the USA for the purpose.
On the outer side of the casing, there are spring-like centralizers attached to help them position the casing string in the wellness center.
Using well casing torch guides in the USA, you can install a casing perfectly and ensure that it does the task of protecting the water well from contaminants. Once the casing is in place, the water remains pure, and the purpose of the project is served.