Borehole Depth

There's no real limit. A factory in Dagenham has four water boreholes that go in excess of 500ft below the surface.

Hello barhama

In New Zealand, some areas have boreholes over a kilometre deep.

Bore wells 30 miles from here, are commonly over 700 feet deep.

Where is the oil coming from?

Are there oil wells locally?

Is a Workshop, Petrol station, or Oil depot "upstream" in your district?

If so, they may have a leaking underground tank.

If you drill deeper, you probably will require a special "deepwell" type of submersible pump, to raise the water to the surface.

Kind Regards....

Thanks. You are great. Actually we have an oil depot 10km upstream, and the pipeline transversed our community. Once more thank you as you have provided us with a solution i.e we shall go down further to may be 200 or 220 m.

barhama,

Just going down further may not necessarily solve your problem...

You must make sure that the well casing itself is installed properly, and the well annulus fully sealed & grouted properly, otherwise, when you drill deeper, the oil contamination will seep down right around the well casing to whatever depth you terminate & screen the well at.

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Just my $0.02...

The JMAN has a really good point!!!

The USGS and EPA several years ago were drilling wells to test ground water for contaminants. They found if they continued to drill deeper they could hit a presently uncontaminated aquifer, and then contaminate it with the water from the contaminated aquifer above!

just your $0.02... but worth thousands of dollars. Very good advice.

It is possible that you can find oil at that depth. Most likely it would be mixed with water. I could be from ground contamination. Dumping of contaminates on the surface could seep down into the water table. If Oil wells are in the area and proper well heads were not in place to protect ground water could cause the problem. Or leakage from the pump jack at the surface due not being properly maintained.

barhama,

In the State of Maine, there are dozens of bedrock wells used for water production that are greater than 1,000 feet deep, with some nearly 1,500 feet deep.

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Just my $0.02...

The max. of water drilled well is deeper than 3000 feet.

You can refer this link to understand more about water drilled well.

http://en.wikipedia.org/wiki/Water_well#Drilled_wells

Good luck.

Good news.

I can tell you how to seperate the oil from water--Electrically.

You will be rich/happy/powerful and have lots of water to boot!

This I am interested in - please tell me more!

We discussed ElectroCoagulation many a time before ,right here in CR4.

Just tell me % or ppm Oil in Water.

I have hands -on experience in suchEC separation techniques:

Good for OIL/WATER/Chemicals separation

Good for getting safe drinking water out of ANY water

Good for separating bulk of sewage and making water safe to discharge to rivers

Please GOOGLE and deep into it.

MM

<mikemahant@hotmail.com>

Man, did I miss the boat - I never saw...

Seriously, thanx!

I don't have a specific application but water is so precious here that I would like to find out about more.

Your experience is from what? Well driller or science? (both great!)

JMAN and vermin bring forth an important point concerning possible degradation of lower aquifer water quality resulting from improper well installation. Beyond that the depth of the well will depend on desired water quality yield. A qualified water well driller working in your area should be able to help there. An environmental driller may be better at providing a suitable seal for the casing at the confining layer (assuming it exists and is continuous) below which you are currently pumping from.

Sounds like your local environmental regulation department might need to be involved.

Good luck

The hole can be as deep as 4,000 miles. After that, you're just pushin' up dirt.