Water Borehole Drilling: Frequently Asked Questions

Water borehole drilling is aimed to reach the aquifer at the depth of 30-200 and in accordance with the depth, well performance (up to 100 m3/hour) and the complexity of drilling. Artesian wells are characterized by larger diameter and greater depth, which in turn requires installing blocking mechanisms and cases. As a result, an extra complex of measures affects the total cost.

The drilling job is typically carried out within 2+ days, though the terms depend on the particular area in a great way. The fact should be underlined that the price for limestone drilling is higher, though such wells boast an increased lifespan: 50 years or more, since limestone plays the role of the filter, protecting the system from silting.

What is the diameter of the well?

The diameter for sand and limestone grounds varies from 127 to 324 mm, depending on the pump performance and the depth of the borehole. However, industrial wells may dictate way larger diameters.

What types of pipes are used in artesian well?

As a rule, the ones made of ferrous metal with threaded or welded connections are installed. Using galvanized pipes is prohibited, since it represents the hotbed of harmful zinc compounds.

Do I need plastic?

On the one hand, the market is oozing with advanced plastic materials, however, there is no fair and absolutely reasonable data on long term using. Therefore, geophysics has no answer to whether the material will keep on handling the regular load within 20 – 40 years, while the lifespan of ferrous metal components is known already: the material of 5mm in thickness is highly likely to serve at least 50 years (taking into account the average corrosion rate of 0.1 mm per year).

However, to meet the most sophisticated demands may include installing plastic pipes in the well: these components will hardly prevent the mechanism from corrosion, yet they will prolong the pump’s lifetime, cutting corroded particles from the walls of the steel columns). Sometimes, especially in difficult geological conditions, a plastic column inside a steel one may be useful, meaning that both types of pipes are used as an integral mechanism.