US Patent 11662338 System and method for measuring sag in a fluid

A device for aging a drilling fluid includes a housing. The device also includes a lower cap that is configured to be coupled to or integral with a lower end of the housing. The device also includes an upper cap that is configured to be coupled to an upper end of the housing. The upper cap has an upper cap hole formed therethrough. The device also includes a piston that is configured to be positioned within the housing and between the lower and upper caps. The piston is configured to move axially within the housing in response to a pressure differential across the piston. The piston has a first piston hole formed therethrough.