Our ECH Series Core Holders are designed for the measurement of the electrical properties
of a core sample under simulated reservoir conditions of pressure and temperature.
With these core holders, both resistivity indices and formation factor can be measured.
We offer both a two electrode and four electrode design. In the two electrode
design, the end plugs are insulated so that resistivity can be measured across the
entire core. The four electrode design incorporates two additional ring electrodes.
Metal rings are placed into the sleeve along the core length at one inch spacing
between the rings. In this manner, the resistivity can be measured across the side
electrodes. To prevent flow bypassing between the metal ring and the core, the ring
is designed with a rubber matrix which seals off the core’s outer diameter. To insure
reproducible contact between the pin connector and ring, an adjustable stem is incorporated
into the stem. At pressure, the stem can be adjusted downward to insure good contact.
End plugs are silver plated for better conductivity. These end plugs are also available
with porous plates for capillary pressure barriers. These core holders are offered
in the standard core diameters, working pressures, working temperatures and types