“Dry” type core holders (Hassler)

Dry-type core holders or Hassler core holders are used in installations for studying core samples reservoir properties at reservoir conditions.
Cylindrical core sample is installed in the cuff of core holder body. Space between body and cuff is filled with hydraulic fluid. Pressure generated in core holder body is transmitted through the cuff, creating core sample radial compression. Hydraulic jack creates axial compression. Hydraulic jack working area is equal to core sample sectional area, thus uniform (triaxial) compression is created.

Sample change in the core holder occurs without hydraulic fluid crimping draining.

Core holders are equipped with special plungers through which samples pore pressure and pore fluids supply and filtration are created.
Core holders can be equipped with a separate heating system including clamp heaters, temperature sensors, temperature measurement and control system with a PC connection.