barrel equivalent

1. n. [Drilling Fluids]
A volume of 350 cm3. In mud laboratory experiments, 350 cm3 is the volume chosen to represent 42 US gallons (1 oilfield barrel) [0.159 m3], so that 1.0 gram mass represents 1.0 lbm. This is a convenient concept for mud technicians to use when mixing or pilot-testing mud samples. For example, in preparing a mud formulation or for pilot-testing purposes, adding 1.0 gram to 350 cm3 of fluid is the experimental equivalent of adding 1.0 lbm to 42 US gallons (1.0 bbl) of fluid.