Ceramic Filter Disk OFI 250µm (Old 190µm)

Porous ceramic filters are commonly used for everything from sewage treatment to medical equipment monitoring.  In the oilfield, ceramic filters are used as a replacement for filter paper in the HTHP filtration test.  Available in a wide range of pore throat sizes, ceramic filters enable the operator to perform filtration tests at similar porosities to that of the formations being drilled, a big advantage over filter paper.  Also, ceramic filters, unlike paper, have depth (usually 1/4″), so invasion and return permeability studies may be performed and bridging characteristics of drilling and drill-in fluids may be analyzed.