Solexperts developed a heavy-duty double packer system for accurate and reliable hydraulic characterisation up to a depth of 1800 m. HDDP equipment have been used for more than 10 years in numerous international hydrogeological investigations at great depths.

●	Hydrogeological in-situ investigation in deep boreholes up to 1800 m (K, T, formation pressure, temperature) at different depths
●	Sampling at selected test intervals
●	Real-time graphical representation of the measurements
●	Interpretation of the test data at the site
●	Continuous overview of the testing procedure for optimisation of the test duration