Methods for optimizing sampling of a petroleum pipeline

G - Physics – 01 – N

Patent

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G01N 1/20 (2006.01) G01F 1/46 (2006.01) G01F 1/74 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2278789

An isokinetic sampling method has been discovered for use in a pipeline carrying a three phase mixture of petroleum, water and gas. The method is used in combination with a fluid fraction measuring means capable of measuring physical characteristics indicative of fluid fraction. A statistically significant number of samples is analyzed over the range of sampler flow rates. The sampling flow rate is reset to correspond with the flow rate of the maximum standard deviation sample. As a result, samples most representative of the pipeline fluid fraction are withdrawn.

On a découvert que l'on pouvait appliquer un procédé d'échantillonnage isocinétique à un pipeline transportant un mélange à trois phases de pétrole, d'eau et de gaz. On utilise ce procédé en combinaison avec des moyens de mesure d'une fraction fluidique, permettant de mesurer des caractéristiques physiques révélatrices d'une fraction fluidique. On analyse un nombre statistiquement important d'échantillons, couvrant la gamme des débits d'écoulement de l'échantillonneur. Le débit d'écoulement d'échantillonnage est réglé de manière à correspondre au débit d'écoulement de l'échantillon à écart type maximum. Ainsi, les échantillons les plus représentatifs de la fraction fluidique du pipeline sont prélevés.

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