Well jet device and the operating method thereof

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

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F04F 5/54 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2623376

The invention relates to well jet devices for testing oil-gas wells. The inventive device comprises a body (1) provided with bypass windows (2) and an insert (3) provided with a jet pump (4). The insert (3) is provided with channels (5, 8, 9) and a mounting seat (10) embodied therein, wherein said mounting seat (10) carries a sealing unit (11) with a channel (12) for a cable (13) and well instruments (14) which are fixed thereto. An output channel (8) communicates with a cavity (15) upstream of the pump (4). A supporting sleeve (16), which is axially movable and spring-loaded with respect to the body, is arranged therein. Said sleeve (16) is provided with bypass openings (18) embodied in the wall of the sleeve and with a flange (25) arranged in the lower part thereof. A recess (23) which is used for limiting the displacement of the sleeve (16) flange (25) and connected to the bypass windows (2) is formed thereunder. In the lower position of the sleeve (16), the channel (5) for supplying an active medium is linked with a surrounding space through the bypass openings (18) and windows (2), whereas in the top position thereof the windows are closed by the sleeve (16) wall. The invention makes it possible to extend the device technical capabilities for carrying out different examinations and other works in the well.

La présente invention se rapporte aux pompes à jets de fond de puits servant à tester des puits de gaz et de pétrole. La pompe de l'invention comprend un boîtier (1) dans lequel on a réalisé des orifices de transfert (2) et un insert (3) avec une pompe à jets (4). A l'intérieur de l'insert (3) on a réalisé des canaux (5, 8, 9) et un siège (10) sur lequel on a monté un groupe d'étanchéité (11) avec un canal (12) destiné au câble (13) sur lequel on a installé des instruments de fond de puits (14). Le canal de sortie (8) communique avec une cavité (15) située au-dessus de la pompe (4). A l'intérieur du corps on a monté une douille d'appui (16) mobile axialement, qui est prétendue par ressort par rapport au corps. La douille (16) comporte des trous de transfert (18) dans la paroi ainsi qu'une bride (25) dans la partie inférieure. Sous les orifices de transfert (2) on a effectué un alésage (23) qui limite le déplacement de la bride (25) de la douille (16) et qui communique avec les orifices de transfert (2). Dans la position inférieure de la douille (16), le canal (5) d'amenée de fluide actif communique avec l'environnement via les trous (18) et fenêtres (2) de transfert, et dans la position supérieure les orifices (2) sont bloqués par la paroi de la douille (16). L'invention vise à élargir les capacités technologiques de l'installation lors de différents tests et autres travaux effectués au fond du puits.

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