Annulus plugging detection using a pressure transmitter in...

Details Annulus plugging detection using a pressure transmitter in... Annulus plugging detection using a pressure transmitter in...

E - Fixed Constructions

21

B

E21B 43/12 (2006.01) E21B 47/06 (2006.01) G01F 1/50 (2006.01)

Patent

CA 2547974

Outer annulus plugging detection is provided for gas-lift oil wells. The outer annulus detection is effected using a pressure transmitter (100). The pressure transmitter (100) provides an indication of pressure within an outer annulus (22) of the oil well. A statistical parameter related to a plurality of outer annulus pressure readings is used to provide an indication of annulus plugging. Examples of the statistical parameter include means and standard deviation.

La présente invention concerne la détection de l'obstruction de l'espace annulaire extérieur pour les puits de pétrole à éjection. Cette détection utilise un transmetteur de pression (100) fournissant une indication de pression à l'intérieur d'un espace annulaire extérieur (22) du puits de pétrole. En l'occurrence, un paramètre statistique se rapportant à une pluralité de mesure de pression de l'espace annulaire permet de fournir une indication de l'obstruction de l'espace annulaire. Ces paramètres statistiques sont essentiellement l'écart moyen et l'écart type.

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