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Matthew & Sons Drilling Services P/L

Siting
Whilst you are pretty much guaranteed finding water anywhere in Melbourne and many other places around the state, I can pick a site if the customer wishes using the old fashioned divining method. I offer this as a free service for my customers. Although I do not guarantee water, my success rate is pretty good. I will never claim to be able to 'find' water. What I am finding are fractures or variations in the strata which should be carrying water.

Under no circumstances will we guarantee the quality or quantity of the water.

Drilling
We offer a range of bores from 2" (50mm) environmental bores, ultra narrow diameter bores of 3" ( 80mm), standard domestic bores of 4" (100mm) diameter, 5" (125mm) bores for small to medium irrigation and commercial use and 6" (150mm) and over for larger scale irrigation. Maximum depth of 210m with air/mud or 200m with cable tool in soft formation. All of our bores are fully cased top to bottom, sealed and cemented.

The standard diameter for a stock and domestic or small irrigation bore is 4" or 100mm diameter and with the correct 4" submersible pump installed can deliver up to 4000gph or 300L/m. The average pop-up sprinkler uses around 7-10L/m of water and an open garden hose 16-20L/m, so as you can see by the above figures, this diameter bore can deliver more than enough water for a domestic supply and even small scale irrigation.

For larger extraction rates of up to 5,300gph or 400L/min you will need a 5" or 125mm bore.

When we have completed the job, we will give you a bore completion report and, if required send a sample of water to ALS laboratories for analysis. We do not recommend installing a pump until you know what the quality of your water as water high in salinity or any other chemical imbalance can have disastrous effects on a garden.


Drilling in Zimbabwe

All bores will come with a lifetime guarantee on construction and workmanship.

Note: All of our bores are cased the entire way from top to bottom, unlike other cut price bores we have seen that are only cased down to the rock and then left 'open hole'. This is not good practice as bits of rock may become dislodged and fall down the hole behind the pump effectively jamming it in the bore.

Capacity Testing
We can give a pretty good estimate on the bores yield during drilling and development (post drilling) and this is usually satisfactory for pump selection. In order to obtain a more accurate figure, a capacity test will need to be carried out. This involves installing a test pump in the bore and pumping it for a pre-determined period of time (usually 3 - 5 hours for stock and domestic, or up to 48 hrs for irrigation) whilst monitoring the draw-down of the water level in the bore.

Old Bores
Rehabilitation (cleanouts) of old bores that have lost productivity are carried out by various methods ranging from mechanical to chemical methods or a combination of these methods. Sometimes a simple blow-out is all that is needed (min charge of $500 +GST).

Bore reconstruction can also be carried out in an attempt stop inflow of sand and mud into bores that have been poorly constructed or in old bores where the lining has corroded or split. This is a costly exercise and the success rate is not guaranteed. After assessing the bore, we will advise what your chances are and may even recommend that a new bore be drilled. We will also advise what licenses will be required (bore alteration or relacement bore).

A follow-up capacity test is usually carried out prove the success of rehabilitation or reconstruction and to clear any contaminants before reinstalling the bore pump.

Because the time taken to carry out these processes can vary from several hours to several days, prices are charged at an hourly rate. In some cases it is more cost effective to de-commission the old bore and drill a new one as there is no guarantee of success in reconstruction.