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What is a borewell?

A borewell is a well of 4½”,  to 12" in diameter drilled  into the earth for retrieving water. In this 4½” and 5½” Borewells are commonly for Domestic purposes while 6½“ and more are for Commercial / Industrial purposes.  A borewell is cased in the region of loose subsoil strata open in hard rock or in crystalline rock . High grade PVC pipes are used for Casing in borewells. The depth of a borewell  can vary  from 50 feet  to 3000 feet.

How do we find-out the availability of water in the land?

The best way to find out whether water is available in your land is to investigate using any geophysical techniques adopted by a qualified hydro geologist. We offer the service of  Experienced Senior Ground Water Surveyor's crew for  finding most suitable site using the latest Computerized Sound Survey Systems. Their findings are 90% accurate.

 

Techniques used in drilling of a borewell :

Ancient techniques utilized driving of tubes inside the earth to drill well using mud or water as a liquid media. Then after the invention of diesel engines, rotary drilling was used to remove cores  out of the earth. This was called calex method. There are several methods used for drilling Borewell. Most commonly used are Compressor Drilling, Manual Drilling and Rotary Drilling+. Compressor Drilling is done with the vehicle fitted with High Power Hydraulic Air Compressor Machine. It is commonly used to drill on soil surface and hard rock. Another method is by manual Drilling or Hand Bore. This is most suited for lands with Clay or Sand. All these drillings will be at 4 ½”, 5", 6½”, 7" & 8½" Dia. Air compressors and pneumatic drilling equipments are used to drill  borewells up to 3000 feet. The rates for drilling a borewell depends on the location, nature of soil and availability of water.

+ Pictures are available in services page.

What is the difference between a borewell and a tubewell?

A borewell is drilled with casing pipe put only up to the soil-rock boundary and this is done normally for shallow depths in hard rock or in crystalline rock. But in a tubewell, the casing pipes are put up to the bottom of the borewells, with perforation in the pipes in some level. Normally the  Tubewells are drilled in  sand and gravel where the availability of water is much below the ground level.


  borewell diagram


What are  Filterpoint, Calyx, Rotary and Hand bore ?

Filterpoint Wells, Hand bore wells, Calyx wells and Rotary Wells are diffent types of Tube wells. Filterpoint Wells are done in the costal areas ranging from 10 ft – 40 ft. Hand bore are manually drilled tube well which may range from 20 – 200 ft. in depth and 4”- 8” in diameter. Most of the hand bore wells need periodical cleaning/Flushing. Rotary wells are constructed using seperate Rotary Rigs which range from upto 2500ft depth with 30” diameter. It is usually done in  salinity areas. Calyx Wells is a miniature type of Rotary well which is inaccessible to Rotary rigs.  The depth varies from 100-600 ft. and the diameter is from 5”-12”.

What care must be done while drilling a borewell ?

While drilling a borewell we have to insert pipes called Casing pipes. It can be PVC/GI. This is done to prevent the Surface water with Sand from entering inside the borewell. These Pipes are fixed inside the hard rock under the soil. Casing  pipes are of 4 - 8 Kgs. Some of the contractors compromises with this casing pipes to reduce drilling cost. We discourage it. Because it will lead to future problems like bore silting, muddy water etc. Filtering can also be done to prevent muddy water and for getting surface yield. Borewells must be kept closed to prevent something to fall inside it and block the bore. Pumps must be installed as soon as possible to avoid bore silting and damage. Dont allow small children to play near the borewell which had a larger diameter, more than 6". Periodical cleaning must be done to retain yield and quality of water.

We recommend to use high quality ISI mark casing pipes with correct measurement & thickness for long life of borewells.