DEEP-DRILLING

WORK PORTFOLIO:

Remediation of old mining works
- Grouting works
- Flooding
- Drainage or diverting holes

Pumping wells – diameter of up to 500 mm, depth of up to 200 m

Diverting holes – draining groundwater into old mining works

Hydrogeological wells

Engineering and geological holes – diameter of up to 220 mm, depth of up to 300 m

Exploratory work for the extractive industries

Holes for wells, heat pumps, measuring probes

Well cleaning – airlift

METHODS OF DEEP DRILLING AND TYPES OF HOLES/BORES:

Our main technologies are rotary core drilling and airlift drilling

PURPOSE OF DEEP DRILLING AND TYPES OF BORE:

Either directly or indirectly, deep drilling is a field that intersects with many others and is therefore essential for a wide range of technical activities. In particular, deep drilling is involved in mining, whether:

In the exploration of mineral deposits, where it represents the main component of exploration technology
Or in mining itself, where it has functionally replaced traditional mining works. Extraction of oil, natural gases, and water, too, is unthinkable without deep wells

Other fields widely employing deep drilling mainly involve construction, where there is a particularly noticeable increase in drilling work, both in quantitative and qualitative terms (foundations, grouting, anchors, etc.), and water management. Recently, a growth of drilling works is also evident in the energy sector (drilling for heat pumps and other works).

A deep well is essentially a long mine works, whose length to diameter ratio achieves maximum value. Excavations are mostly done vertically, with inclinations at different angles from the plumb line. Deep wells are drilled for the following purposes:

Exploratory purposes: to obtain geological and geotechnical information
Operational purposes: to create a hole for mining, geological, construction, and other technical purposes

BASED ON THE ABOVE, WELLS ARE GENERALLY DIVIDED INTO:

Geological survey wells, which aim to provide geological and geotechnical information. Their characteristic feature is that they are used only for the duration of drilling; after completion, they have no function (they may be even harmful) and must be disposed of. These holes and wells include – in geological surveying: mapping, structural, supporting, parametric, pioneering, regional-profile, searching, outline, etc; in geological mining: searching, orientation, drift, deposit, securing, parametric, testing, wells for geo-mechanical purposes, etc.
Operational and technical boreholes, which aim to create holes used for a specific purpose after drilling. Their characteristic feature is that they start to serve their purpose only after the well is completed. These holes and wells include – in mining: mining, ventilation, freezing, grouting, injecting, pit (large-diameter), drainage, degassing, foundation, fire-fighting, connecting, rescue, blasting, and gasification, etc.; in construction: pile, micropile, monitoring, grouting, connecting, remediation, and holes for anchors, etc.; in water management: pumping, observation, and balneological; in power engineering: holes for heat pumps and holes for the usage of geothermal energy.

DEPENDING ON THE HOLE AND WELL CLASSIFICATION, I.E. ON THE GEOLOGICAL INTENTIONS, CERTAIN TECHNICAL ASPECTS ARE SPECIFIED WHEN DIGGING. IN PARTICULAR, THESE INCLUDE: