Method for operating a well jet device during repair and...

F - Mech Eng,Light,Heat,Weapons – 04 – F

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F04F 5/02 (2006.01) F04F 5/10 (2006.01) F04F 5/44 (2006.01) F04F 5/46 (2006.01)

Patent

CA 2456217

The inventive method consists in the following: a drillable packer provided with a channel closed by a back valve is arranged in a well; afterwards a tubing string carrying a jet pump and a stinger is run into said well, the stringer being connected to the packer; the back valve is open; a logging instrument and a sealing unit are introduced into the tubing string with the aid of a cable; a depression is produced on the formation by means of the pump, a bottomhole pressure and the parameters of the formation are measured with the aid of said instrument, the parameters of physical fields being recorded. The results of said investigations being interpreted, the technical state of the well is defined. The instrument and the sealing unit being extracted from the tube string, a blocking insert is dropped therein. The tubing string is uplifted, the stringer is disconnected from the packer and the back valve is closed. A cement slurry being pumped into the tubing string, said tubing string is put down, the stringer is connected to the packer and the back valve is open. The cement slurry is pumped into the tail space, squeezed into the productive formation and the tubing string together with the pump and the stringer is extracted. The cement slurry being hardened, the packer is drilled out, the formation is perforated and the tubing string provided with a guiding cone, the packer and the pump is brought in the well. Said invention increases the reliability of the repair and insulating operations.

L'invention concerne un procédé consistant : à installer dans un puits de forage une garniture d'étanchéité forable pourvue d'une conduite obturée par une soupape anti-retour; puis à faire descendre dans le puits une colonne d'extraction pourvue d'une pompe à jet et d'une canule de guidage et à raccorder cette dernière avec la garniture d'étanchéité; à ouvrir la soupape anti-retour et à faire descendre dans la colonne un appareil de carottage et une unité d'étanchéité accrochés à un câble; à créer une dépression sur la couche au moyen de la pompe, puis à enregistrer avec un appareil la pression de fond et les paramètres de la couche, ainsi que les paramètres des champs physiques; à interpréter ces données et à déterminer l'état technique du puits; à retirer l'appareil et l'unité d'étanchéité et à introduire dans la colonne une pièce de blocage; à relever la colonne en détachant le montage de la garniture d'étanchéité et à refermer la soupape anti-retour; à injecter dans la colonne une boue de bouchage; à faire descendre la colonne, à raccorder la canule de guidage à la garniture d'étanchéité et à ouvrir la soupape anti-retour; à injecter la boue dans un espace situé sous la garniture d'étanchéité, à l'esquicher dans la couche de production et à retirer la colonne, la pompe et la canule de guidage; à forer la garniture d'étanchéité après durcissement de la boue, à perforer la couche et à faire descendre dans le puits la colonne, la canule de guidage et la cloche de guidage, la garniture d'étanchéité et la pompe. La présente invention permet d'augmenter la sécurité des travaux de réparation et d'isolation.

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