Metering tubes for improved fluid flow measurement
AssigneeCanada Pipeline Accessories, Co. Ltd.
InventorBlaine Sawchuk
Life of this patent
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Abstract
A meter tube assembly for use with an ultrasonic flow meter is provided. The meter tube assembly includes a pipe spool having an extremely rough first section including an interior surface with a relative roughness (ε/D) of 1% or greater. Fluid passing through the extremely rough section exhibits a flow profile that remains substantially constant over the range of Reynolds numbers. As such, ultrasonic flow meters can be simplified as they need not account for different Reynolds numbers.
Claims7
A meter tube assembly for use with ultrasonic flow meters comprising a pipe spool having a first section including an interior surface with a relative roughness (ε/D) of 1% or greater.
A meter tube assembly for use with ultrasonic flow meters comprising a pipe spool having a first section of about 10 D in length and having a plurality of rings disposed on an interior surface of said first section, each of said plurality of rings spaced about ½ D from each other.
A meter tube assembly for use with ultrasonic flow meters comprising a pipe spool, and a perforated liner disposed within said pipe spool, the perforated liner including a plurality of holes, each hole having a diameter that is greater than a thickness of said liner and each hole having a pitch that is greater than a diameter of diameter of the hole.
A method for measuring fluid flow through pressurized pipelines comprising selecting a section of metering tube having a relative roughness of greater than or equal to about 1% and measuring fluid flow through the section of metering tube using an ultrasonic meter.
Dependencies are inferred from the claim text.