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US 2009/0211364 A1Published application
Cell for testing fluids at elevated pressures
AssigneeSinvent AS
InventorErik Gosta Bruno Lindeberg
Life of this patent
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Abstract
An apparatus for a burst safe pressure-neutral high pressure cylinder in pVT and condensate cells is described. The dimensions of an outer cylinder are such as to prevent plastic flow of the inner cylinder wall caused by elevated inside pressure and/or temperature.
Claims3
A test cell for testing fluids at elevated pressures, comprising
- an inner cylinder (2) inside which a piston (4) is movable axially by hydraulic means (7, 10) to control pressure and volume of a fluid (9) contained at a test fluid side of the piston (4), said inner cylinder (2) having a thin cylinder wall and being closed at an end (11) at said test fluid side,
- an outer cylinder (5) coaxially arranged outside said inner cylinder (2), thereby forming an annular space (6) between said cylinders (2, 5), said outer cylinder (5) having a thick and sturdy construction, and at least one port (7) for introducing hydraulic fluid (10) to a hydraulic side of said piston (4) opposite said test fluid side, and to said annular space (6),
- characterized in that
- said annular space (6) has a radial dimension less than a maximum elastic expansion range of said inner cylinder (2), whereby rupture of said inner cylinder (2) from a high differential pressure across the cylinder wall can be avoided, due to restriction by said outer cylinder (5).
1 more element
Dependencies are inferred from the claim text.