Patent ID: 8230747
Filing Date: 2012-07-31
Classification: G01N

Abstract:
1. A test cell for testing fluids at elevated pressures, comprising: an inner cylinder having a piston inside thereof that is movable axially for controlling pressure and volume of a fluid on a test fluid side of said piston, said inner cylinder having a thin cylinder wall and being closed at an end of said inner cylinder on the test fluid side of said piston; an outer cylinder coaxially arranged outside said inner cylinder so as to form an annular space between said outer cylinder and said inner cylinder, said outer cylinder having a thick and sturdy construction relative to said inner cylinder, and said outer cylinder having at least one port for introducing hydraulic fluid to a hydraulic side of said piston opposite to said test fluid side of said piston and to said annular space; and wherein said annular space has a radial dimension that is smaller than the maximum elastic expansion range of said inner cylinder such that rupture of said inner cylinder due to differential pressure across said thin cylinder wall is prevented by restriction of expansion of said inner cylinder by said outer cylinder.