The Borehole Drilling Methods - Borehole Drillers Of Choice In Zimbabwe
Drilling usually proceeds until either sufficient water is intersected (i.e., successful borehole scenario) or the client's budget is exhausted.
The Depth of the Borehole: Deciding on the final depth of the borehole is probably a decision that creates the greatest amount of misunderstanding between client and contractor:
Groundwater is found at varying depths in both Zimbabwe and Southern Africa, in some areas it is 100 metres deep, on the whole, however, most boreholes intersect usable water at depths of between 40 and 80 metres. The geologist or drilling contractor will advise on the depth at which water can be expected, just because “hard rock” is intersected, there is not necessarily any reason to stop.
Alternatively, the competent driller can advise the client on the borehole's prospects by continually examining the rock chipping samples and also from his own experience in the area.
The final stage of the sequence of events is to pump and pipe (reticulate) the water from the successful borehole into your hole/factory/garden. The end use of the water will to a large extent determine what type of pumping and reticulation system is to be installed.
In general, there are two options for the pumping system. With a high yielding borehole, one can either pump from the borehole via a pressure tank and then into the main supply line or into a storage tank (on the surface) and then pressurized into the main supply line.
A correctly sized and installed pump should last for many years with a minimum of maintenance and the extra cost of having a system professionally installed will pay for itself time and time again.
Standard Prices For Borehole Drilling
Borehole Siting (Geo-Survey)
Drilling & Casing (40m)
Standard Class 6 Casing included.
Premium Casing Upgrade
Upgrade to Class 9 Casing for extra durability.
Borehole Deepening / Extra Metres
For drilling beyond 40 metres.
Double Casing
For unstable ground conditions.
Tank & Tank Stand
5000 Litre Tank with a 4-metre Stand.
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