IDDP-2 (Icelandic Deep Drilling Project)

Mannvit is as one of the major consultants for the IDDP consortium in both the first IDDP well, IDDP-1, drilled at the Krafla Geothermal Power Plant and the second IDDP well, IDDP-2, drilled near the Reykjanes Geothermal Power Plant. The objective of the IDDP-2 is to drill down to 5.000 m, searching for a supercritical steam zone and temperatures of 400-500 °C.

The RN-15/IDDP-2 reached beyond 4200 m depth in November 2016 and became the deepest geothermal well in Iceland. The well is cased with a 9 5/8-inch steel casing to 2.940 m, and after cementing the casing the well was deepened with 8 ½ inch rotary drill bit. While drilling below the casing, quite severe losses of circulation fluid were experienced. The objective is to drill down to 5.000 m, searching for a supercritical steam zone.

The first well IDDP-1, was drilled in Krafla geothermal field in 2009. Targeted well depth was 4500 meters. At 2100 meters depth the drill bit intersected magma, which stopped drilling of the well. The geothermal well produced up to 450°C hot steam when it was discharge tested, which is the hottest geothermal well ever measured (see Landsvirkjun's video from IDDP-1 below in Icelandic).



  • Well design including wellhead
  • Procurement of material
  • Drilling Program
>400 °C 
30-40 MW 
Potential power

HS Orka leads the IDDP-2. The IDDP consortium includes: HS Orka, Landsvirkjun, Orkuveita Reykjavíkur, National Energy Authority of Iceland, Statoil and Alterra. The project, which marks a milestone in energy research, involves drilling deeper wells in high-temperature geothermal areas than have been attempted before in order extract more energy from each well.  If that is successful, it is possible to increase the power production from high-temperature geothermal areas significantly and reduce the environmental impact of the production field. More information is available at the IDDP official website


IDDP-1 hottest geothermal well in the world