Method of well testing by obtaining a non-flashing fluid sample

E - Fixed Constructions – 21 – B

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E21B 49/08 (2006.01) E21B 43/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2193270

Apparatus and method for testing a well and obtaining a fluid sample therefrom. The apparatus comprises a housing connectable to a tubing string and having a packer at the lower end thereof. The packer is set, and fluid is flowed from a formation or zone of interest into the chamber and then into a sampler in a controlled manner such that the fluid in the housing or sampler does not flash. In one embodiment, a pump is used to flow formation fluid; plugs are used in the housing to first flow dirty fluid and then flow clean fluid into the housing. In another embodiment, a nitrogen cushion is bled slowly to flow fluid into the housing.

Appareil et méthode d'essai de puits et de prélèvement d'un échantillon de fluide dans un puits. L'appareil comprend un boîtier qui peut être connecté à une colonne de tubes et qui est pourvu d'une garniture à son extrémité inférieure. La garniture est mise en place, et le fluide s'écoule d'une formation ou d'une zone intéressantes dans la chambre et, ensuite, dans un appareil d'échantillonnage de manière contrôlée de sorte que le fluide dans le boîtier ou l'appareil d'échantillonnage ne s'enflamme pas. Dans une application, une pompe est utilisée pour provoquer l'écoulement du fluide de la formation; des bouchons sont utilisés dans le boîtier pour faire s'écouler d'abord le fluide sale et, ensuite, le fluide propre dans le boîtier. Dans une autre application, un coussin d'azote est insufflé lentement pour que le fluide s'écoule dans le boîtier.

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