1. n. [Drilling Fluids]

A pressurized cell, fitted with a filter medium, used for evaluating filtration characteristics of a drilling fluid while it is either static or stirred (to simulate circulation) in the test cell. Generally, either low-pressure, low-temperature or high-pressure, high-temperature devices are used.

See: drilling fluid,  dynamic filter press,  dynamic filtration,  filter medium,  filter press,  filter-cake quality,  filter-cake thickness,  filtrate,  fluid-loss control,  fluid-loss-control material,  high-pressure, high-temperature filtration test,  low-pressure, low-temperature filtration test,  spurt loss,  static filtration