Saturday, November 13, 2010

Ensuring expertise in borehole drilling and water treatment technology

Do you know what are the main considerations which are taken into account before the actual ground drilling work starts? According to geologists, a detailed geophysical and hydro geological ground water survey is an important aspect to see if the land intended for drilling has sufficient water in the ground. How to known the presence of water in the ground, this is determined through Vertical Electrical Sounding (VES), seasimic method, magnetic survey, electrical profiling. These are the common basic methods used to determine the availability of underground water. The availability of drilling tools and their accessories is another aspect to be noted so as in order to successfully manage the drilling work. All these cannot be run smoothly without professionalism. Knowledge is basically required to accomplish the intended task. It is sometimes complained by water users that, some drilled water from the borehole tastes salty, but water experts says that this is due to the presence of samples of chlorine minerals found on the ground. This is avoided by unwanted water bearing formation which is sealed off while drilling is taking place anywhere, and if such precautionary method is not applied, then drilled water once passes through such rocks are contaminated with such minerals, thus causing a salty taste.
Geologists describes drilling borehole as a unique exercise that is being practiced with extra care in order to get water from the ground. But one point to note is that, before drilling takes place, geologists have to overlook if the area intended for drilling is supplied with enough water compared to the normal operational costs to be incurred. But geologists says that, not all ground surfaces are suitable for drilling as water might be found in deep water tables containing high percentage rate of chlorine minerals that gives a salty taste of the drilled water. Apart from that, drilling work might go deeper and deeper to about 400 meters away from the ground and over, thus rendering the work of drilling to become so expensive to afford for ordinary persons and the society in general.

Laying of the underground water pipes.

The ground drilling work which sometimes might go up to 600 meters deep, is also said to be too expensive for the government to afford. As this is too costly, therefore the government fails to afford the expenses met prior to the start of drilling boreholes. The only option left for the government is to afford wherever the majority of the people might be in need of such a commodity. Study has shown that, due to the expensiveness which occurs for ground drilling, and coupled with the availability of the technology used, which is necessitated by use of modern machines, most governments especially of the developing nations whose half of their national budgets entirely depends on foreign aid have totally failed to put much efforts on the use of ground drilling technology for their country’s development.

What is a borehole?

Borehole is the generalized term for any narrow shaft drilled in the ground, either vertically or horizontally. A borehole may be constructed for many different purposes, including the extraction of water or other liquid (such as petroleum) or gases (such as natural gas). Also a borehole might be constructed as part of a geotechnical investigation or environmental site assessment, for mineral exploration, or as a pilot hole for installing piers or underground utilities. Boreholes used as water wells are described in the engineering and environmental consulting fields, the term is used to collectively describe all of the various types of holes drilled as part of a geotechnical investigation or environmental site assessment. This includes boreholes advanced to collect soil samples, water samples or rock cores. Samples collected from boreholes are often tested in a laboratory to determine their physical properties, or to assess levels of various chemical constituents or contaminants. Typically, a borehole used as a well is completed by installing a vertical pipe (casing) and well screen to keep the borehole from caving. This also helps prevent surface contaminants from entering the borehole and protects any installed pump from drawing in sand and sediment. When completed in this manner the borehole is then more commonly called a well: whether it is a water well, oil well or natural gas extraction well.


Erika eliason said...
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Erika eliason said...

ice Blog.. Found your blog while searching topics related to borehole survey tools.You must have to be expertise in borehole drilling to make this work perfect.Need to make the perfect measurement. SPT is the Leading Borehole Survey Tool company providing geological survey systems for the Oil, Gas and mining industries.

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