Water-powered drilling in water-rich formation near Malmö harbour

By drilling with Wassaras water-powered DTH hammer instead, the water in the formation was not affected at all and the delay was heavily reduced.


Malmö, Sweden



Type of product

W120 Hammer

The new concert, congress and hotel centre Malmö Live is designed to meet the toughest demands for environmental friendliness.

Initially the drilling for geothermal heating was performed with air-powered DTH hammer and large amount of water was being pumped up from the ground and caused problems.

The drilling project was likely to be delayed significantly. By drilling with Wassaras water-powered DTH hammer instead, the water in the formation was not affected at all and the delay was heavily reduced.

A new concert, congress and hotel centre in Malmö, Sweden

The new Malmö Live centre in Malmö is scheduled to be opened during summer 2015.The block will comprise some 90 000 m2. The congress facilities will seat 1 500 people while the concert hall will seat 1 600. The hotel will be 85 meter high, comprising over 400 rooms and a sky bar at the 25th floor.

One goal is to see the centre certified according to LEED (Leadership in Energy and Environmental Design). It consists of a suite of rating systems for high performance green buildings, homes and neighbourhoods. Malmö Live actually aims to meet the highest LEED standards, named Platinum.

One of the many environmentally friendly solutions is the geothermal heating system that consists of 75 boreholes, each 280 meter deep.

Drilling with water-powered equipment in waterrich formation

The Wassara DTH hammer, W120, requires some 340 liter per minute during operation. As this equals 20m3 of water per hour, the difference is drastic. This volume is used for powering the hammer, not pumping water from the borehole.

The water-powered drilling doesn’t affect the water in the formation at all. When drilling with high-pressure water, the water flows like it would in a U-formed tube (as the inner flow in the drill string goes downwards and the outer flow goes upwards in the borehole).

This gives the possibility to drill in water-rich formations without problem and regardless of borehole depth.

Download full Casestudy for further technical details

Equipment used

DTH HammerW120 Hammer
Drill bitØ 140 mm
Drilling fluidClean water from the river
RigMDT and Hütte
Water pumpWASP 150 Diesel
Borehole length280 meters
Scope of drilling21 000 meters
Geologic formationLimestone

Case studies

See our featured Case studies below to learn what real world UrbanGeo-projects our technology as been a part of.

  • Bringing geothermal energy to office workers with deep casing drilling

    Thanks to Wassaras water-powered DTH hammer, drilling passed without incident through the different formation layers.

  • Geo-energy in the heart of Stockholm, Sweden

    In the very heart of Stockholm, a building needed heating and cooling. This project required a method that provided a safe working environment, was environmentally friendly and could drill straight holes.