How Does Borehole Drilling in Zimbabwe Work!

There is a drill that makes use of drilling fluid which travels up the inside of the drill stem, through the pump and is discharged into the settling tank where it will cycle through again. 

After cuttings are settled, the drilling fluid flows into the borehole and down to the bit. The pressure of the fluid against the borehole wall prevents the hole from collapsing.

WHAT TO KNOW BEFORE DRILLING A BOREHOLE: The first thing to note is that the contractor hired to drill your borehole is not guaranteeing that they will hit the water, their job is to solely drip a hole in the ground to the depth that you have requested them to.

If you want to minimise the risk of not hitting the water and resulting in a "Dry Hole" then you should hire the services of a Hydrogeologist (Borehole Siters) who will analyse your area and possibly run physical tests on your property to determine where would be the best spot to drill and what are your chances of hitting the water.

You need to keep in mind that the drilling rig is a huge 25 ton or more piece of machinery;
How Does Borehole Drilling in Zimbabwe Work!
How Does Borehole Drilling in Zimbabwe Work!
You need to make sure the spot you want to drill is accessible or you need to deconstruct whatever is in the way, then reconstruct when the drill is complete. These costs are not for the drilling contractors to cover.

IS GETTING A BOREHOLE A GOOD INVESTMENT: In general - yes, installing a borehole will add substantial value to your land and over time it will represent a good investment. Factors like the quality of your garden are something that could make up a good 5-20% of the property's value. Using borehole water to better your land is a double success because you will save on your water bill and improve your land aesthetic. Simply having any sort of sustainable feature to your property also adds value to it, therefore rain catchment systems and boreholes will be an advantage to your property price. 

These factors rely on the installation to have been done by professionals and maintained properly.

MAKE SURE YOU DON'T GET SCAMMED: The main way you can avoid being “ripped off” is to educate yourself about the borehole drilling process. By reading this you've already begun doing that!

The second most important step is to deal with reputable contractors. They are most likely to give you clear expectations before the work begins and should either party not deliver there will be the option of recourse. Contractors should use some form of a contract document detailing their job, or they should give you a quotation specifying the work to be done with delivery times and costs. 

By doing this, both you and the contractor will understand your responsibilities and expectations. 

Remember that contractors make their own rates, so it's a good idea to have more than one quote before making your choice. Keep in mind though, you need to look into the details not just accept the cheapest quote! 

This behaviour will likely increase the chances of complications, bad service or even being completely scammed.

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Five Facts About Borehole Drilling That You Need To Take Note Of:

1. Know Your Borehole Casings:The Preferred Borehole Casing In Zimbabwe Is Class 9 and 10 (Pressure Classes.)This is because Class 9 and Class 10 Casings are more collapse resistant. The strength of a Casing is often described as collapse resistance.

2. Borehole Drilling Depth: The exact depth, of where the water is located, cannot be established by the drilling contractor nor the Water Surveyor (Borehole Siter).

3. The Is No 100% Guarantee On Water: It is important to note that it is never a 100% guarantee that any hole will yield water, the amount and water quality can also not be guaranteed by the drilling contractor and water surveyor.

4. Borehole Siting or Water Surveying Is Important: Making use of a hydrologist or traditional water diviner will increase your chances of having a successful borehole that will yield a sufficient amount of water.

5. Know The Risks: The risk of the borehole drilling lies with the property owner. The client will still be liable for the drilling costs irrespective of a borehole yielding water or not.

The Cost or Prices For Borehole Drilling in Zimbabwe:

1. Siting: $100.00USD
2. Drilling and Casing: (40 Metres) $1300.00USD - (Using Class 6)
3. AC Electrical Installation: $1000.00USD
4. Solar Pump Installation: $1400.00USD
5. Extra Metres After 40 Metres: USD $45.00USD per metre.
6. 5000 Litre Tank and 4 metre Tank Stand: $1000.00USD
7. Stuck Pump Fishing Out: $180.00USD
8. Capacity Testing: $250.00USD

- Casing with Class 9 Casing incurs an additional $200.00USD.
- Double Casing: $20.00USD per metre.

Note this is the average price borehole companies charge for their services in Zimbabwe, but this figure is subject to changes if conditions are different depending on the construction site.

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