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Borehole
 
Why a Borehole System
 
Borehole tests done by MWSC
 

Design and Construction of Reliable Borehole Pumping Systems

With cutting-edge borehole drilling technology, we offer a comprehensive service in organizing the siting, drilling, pump selection/installation and water treatment of boreholes diameters up to 20inches and up to 100 meters deep under the ground. From well design to point of distribution, MWSC offers complete system on a turnkey basis. Each component or system is installed by trained and experienced personnel who adhere to rigid quality standards.

Features
  • Direct rotary drilling
  • Drilling diameter up to 20”, drilling depth up to 100 meters
  • Borehole casing up to 12”
  • High quality heavy-duty borehole pumps ranges from 4”, 6”, 8” and 10”.Pump sizes depend on the well design
  • Threaded PVC pipes, casing and screen
  • Bentonite seal to prevent water from leaking from subsurface unconfined aquifers or from the land surface into well
  • Boreholes flushing for cleaning and disinfecting purposes
  • Variety of borehole tests, including Yield Test, Drawdown Test, SDI test, Sieve Analysis, Chemical Analysis
  • Designing and construction of borehole location as creative structures

Boreholes are narrow shafts bored into the ground with the purpose of extracting water, as intakes for desalination plants or other such uses. MWSC boreholes go 30-50 meters deep under the ground, depending on the requirement. As the borehole is placed very deep into the ground, any chance of damage to islands’ natural freshwater lens is eliminated. Borehole wells are clean and environmentally friendly alternative source. Boreholes enable to get water from deep underground, where water is cleaner and free of contamination.

The Benefits of a Borehole System
  • Minimal pre-treatment required due to natural filtration.
  • Minimal problems and easy maintenance compared to open sea water intake.
  • Less risk of water contamination. Boreholes enable to get water from deep underground, where water is cleaner and more hygienic.
  • More consistent water quality and temperatures.

Why Choose a Borehole System
  • Materials used ensure proper corrosion protection, reducing chances of collapse of well as PVC pipes are used.
  • MWSC boreholes are clean and it is further ensured by going through a ‘flush’ routine on an annual basis.
  • MWSC is ISO 9001:2015 and ISO 45001 certified and follow stringent quality checks in operations as well as health and safety standards.

Constant Discharge Test

Water is flushed 12-24hrs from Borehole to remove all the mud and other materials in the borehole.

Recovery Test

Test done if required drawdown observed is less than the required level during constant discharge test, to determine residual drawdown of water level.

Step draw down test

To check the drawdown or the extent of the lowering of the water level in the borehole, during pumping.

Yield Test

To determine volume of water discharge from the borehole during a specified time. Checks the time required to fill a 200ltr drum.

Raw Water Chemical Analysis

To check components of water quality including chemical and physical aspects.

SDI Test

To determine the amount of silt and clay in water. Water is pumped from the borehole with 30 PSI (2Kg/Sq.cm) pressure through 0.45 micron filter.

Sieve Analysis

This test is done to check the permeability of water. It is conducted to know the various particle sizes available in confined aquifers at various levels of borehole. Test is done with the sample collected during drilling time.

In-situ Physical Parameter Test

Parameters such as pH, temperature, resistivity, conductivity and TDS are tested on site by using sophisticated Dialysate Meter.