Heavy-Duty Double-Packer Systems (HDDP)
Solexperts developed the Heavy-Duty Double-Packer System (HDDP) for the geohydraulic characterisation of hard rock up to 2000 m depth. The robust test equipment is characterised by high measurement accuracy and great reliability.
Special system components such as a coated 4-fold measuring cable mounted on a winch with hydraulic power unit, adapted installation tools from the petroleum industry such as tubing spider and tubing elevators and of test rods with lengths up to 9 m are used. Therefore, the installation and removal times of the HDDP system can be significantly reduced.
Design of the Heavy-Duty Double-Packer System
The adjacent illustration shows the schematic design of the test system with the most important down-hole components:
- Down-hole probe with temperature and pressure measurements in, above and below the test interval
- The double packer assembly with individually inflatable packers and a filter for the access to the interval
- The shut-in valve to close and open the access port to the test interval