Leak detection method

Details Leak detection method Leak detection method

E - Fixed Constructions

21

B

E21B 47/10 (2006.01)

Patent

CA 2392064

The method comprises the steps of: a) passing a sonic tool (15) provided with a transducer package (17, 18) capable of sending and receiving a sonic signal, through the well tubular; b) prior to start of hydrocarbon fluid production through the well, inducing the transducer package (17, 18) to transmit the sonic signal through the well tubular (9) and to receive a reflected signal, and making a primary registration of the reflected signal indicative of a leak- free well tubular; c) after start of hydrocarbon fluid production through the well, inducing the transducer package (17, 18) to transmit the sonic signal through the well tubular (9) and to receive a reflected signal, and making a secondary registration of the reflected signal indicative of an operational well tubular; d) comparing the primary and secondary registrations and detecting a leak in the well tubular from a difference between said registrations.

Le procédé comprend les étapes suivantes: a) passage dans la colonne d'un outil (15) acoustique équipé d'un transducteur (17, 18) capable d'émettre et de recevoir un signal acoustique; b) avant le début de la production de flux fluides d'hydrocarbures dans le puits, préparation de l'ensemble /17, 18) transducteur à l'émission du signal acoustique dans la colonne (9) et à la réception du signal réfléchi, et premier enregistrement du signal réfléchi indiquant l'absence de toute fuite dans la colonne; c) après le début de ladite production dans le puits, préparation de l'ensemble (17, 18) transducteur à l'émission du signal acoustique dans la colonne (9) et à la réception du signal réfléchi, et second enregistrement du signal réfléchi indiquant l'état opérationnel de la colonne; d) comparaison entre les premier et second enregistrements et détection d'une fuite dans la colonne à partir de la comparaison.

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