The use of HVS 245 drilling rig in 2012

Průzkumný vrt		Manipulační šachta pro vrtané studně

In the first half of 2012 our HVS 245 drilling rig was used at 9 sites. As the volume of orders placed for 2012 exceeds the output of the equipment in normal use (2 workers), we had to switch over to a more-shift regime. The rig now works non-stop, including weekends. There are altogether 4 workers taking turns.

Drilling work has expanded and includes making wells. Currently the price of water from public water distributing system in Chrudim for an average household is CZK 100.-  (Euro 4) per 1m³. The price includes water tariff, sewage charge and a fee for the water meter. As the cost of water from the public system is increasing, more and more people want to have their own source of ground water. The Ekomonitor company, as one of few firms in the Czech Republic, can make exploration wells as well as bored wells without any restrictions. This means also bores deeper than 30 m. In the Czech Republic, such bores have to be inspected by the State Mining Authority. The preparation, designing and making such bore holes must be in harmony with mining acts and regulations, which chiefly concern safety of labour and health protection of workers.

An example of a successful bored well in 2012 is the one made for the Secondary Agricultural and Higher Vocational School in Chrudim. At the school farm, a 65-m deep well was drilled by the HVS 245 rig. The well collects ground water from Mesozoic marlstones of Upper Cretaceous. The well supplies water at 0.5 l/s. Under the permission for water usage, 5 000 m³/year of ground water can be withdrawn. It is good quality potable water without any necessity for treatment. The cost for drilling the well was CZK 250,000.- see table below:

Item		Unit	Number of units
1	Drilling, well completion, casing	lm	65
2	Drilling rig transport	total	1
3	Preparation of the site	total	1
4	Confirmation pumping test	total	1
5	Pumping test	day	23
6	Preparation of HDZ working place	total	1
7	Fundamental chemical analysis	No. off	3
8	Complete chemical analysis + radon + pesticides	No. off	1
9	Taking and transporting samples	total	6
10	Other overhead costs of HG survey (final report evaluating hydro-geological supervision, sequence and job management)	total	1
Total price incl. 20% VAT		250 000,- Kč

Using water from the public distribution system (water tariff), the school would pay 5 000 m³/year x CZK 40.- for 1m³ = 200.000,- CZK/year. This calculation shows that in 15 months the investment of the school will be returned.

Section of the finished well at the agricultural school:

 

 

With growing prices of water, interest in bored wells will also increase.

The Vodní zdroje Ekomonitor, spol. s r. o. company can provide bored wells on a turn-key basis, i.e.:

1. Design for a bored well, including hydro-geological part. Arranging permission for making the bore hole.
2. The well is drilled under supervision of a geologist and evaluated in a final report (including water quality).
3. The company also arranges permission at the water management authority for taking water from the well.

For illustration, we have enclosed a number of photographs showing work with the drilling rig.

Drilling a well

Making a 65-m deep bore hole		Drilling in a 273-mm surface string

 

Drilling an exploration well		Core drilling

 

Soil sampling		Bored well accessories, PVC-U 140x4.1 mm

 

Geological documentation of the well		Completed exploration well