Exploratory drilling (continuous coring)

max. depth 250 m, max. diameter 146 mm

Exploitation drilling

max. depth 180 m, max. diameter 1300 mm

Drilling methods:

• direct

• reverse

• down-the-hole drilling (DTH)

• bailing

Groundwater research on Hrvatske Željeznice location, near Botovo, Croatia. Main goal was to get vital parameters which will be used on the location's rehabilitation project - heavily contaminated with organic and inorganic pollutants.

Vodoistražni radovi na lokaciji HŽ u Botovu vršeni su sa ciljem dobivanja relevantnih parametara na kojima će se temeljiti projekt sanacije lokacije - snažno kontaminirane zbog organskih i anorganskih onečiščivaća.

Water well drilling for the water supply demand for city of Sarajevo, Bosnia & Herzegovina. Drilling was done using reverse circulation method, with "clean" water as drilling fluid, drilling diameter 1300 mm and 750 mm casing built in. Despite using weaker drilling rig for complex works, where loss of circulation was up to 200 l/m, works were finished at professional technical level. Because of the great drilling fluid loss during the drilling process, a channel to the nearby lake was dug out using excavator, to ensure steady drilling water supply.

Old dug well deepening, on the location near Okić, Croatia.

Water well percussion drilling, for the water supply demand for concrete plant in Varaždin, Croatia; impact method - bailing.

Investor: FACULTY OF FORESTRY, UNIVERSITY OF ZAGREB

Water well drilling using reverse circulation method, for the water supply demand for Faculty of Forestry nursery, University of Zagreb, Croatia. The project was done in the Sava river alluvial deposits and despite facing boulders which sometimes make using reverse method difficult, the water well was completed successfully.

Water well drilling at Gaza I water supply yard, in Karlovac, Croatia.

Water wells were completed with very high degree of utilization, with capacity up to 100 l/s.

Water well drilling for the mines' water supply demand.