Water well design
A well is considered a stream that transports water from the aquifer to the surface. For this course, the water well must be designed as follows:
1 – It gives the highest productivity with the maximum efficiency and the lowest drop in the level.
2- The behavior is proportional to the pumping station and the characteristics of the bearing layer.
3 – It produces good water quality, protected from pollution and free of sand.
4 – Maximizing the life of the well in proportion to the cost.
5 – The cost is reasonable in the short and long term.
The overall goal of well design is:
1- Finding a stable, permanent and efficient facility that has enough space to install a pump
2 – It allows ground water to move from the aquifer to the well without effort
3- Free of sand
4 – The water must be of the required quantity and quality,
5 – It prevents bacterial growth and rotting of materials in the well.
Many things must be taken into consideration when designing a well, such as:
1- The depth of the well.
2- Type of well.
3- Filter material, Its size (diameter) and thickness.
4- Design of water intakes.
5 – Composition sealant.
6 – Monitoring
What is well casing or well casing:
The well casing can be defined as a casing of large diameter steel pipes that is assembled and lowered into the newly drilled wellbore.
This process is considered one of the most important well drilling operations, and making the decision to lower the casing pipes is sometimes considered a decision that greatly determines the success or failure of the drilling process.
A number of drilling engineers and geologist design the landing points for casing pipes based on the surface data that is known during drilling.
The type and weight of the drilling fluid required to drill a specific layer are sometimes the deciding factor in choosing the casing drop point. For example, if drilling a layer with very high pressures requires a drilling fluid with a large specific gravity, the upper layers must be isolated with casing pipes to avoid total loss of the drilling fluid.
To follow more articles, please visit our website on Facebook