Bellows valve

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/08 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2718215

The present invention relates to a valve device which is employed in connection with oil and gas wells with the object of increasing the well's production. The valve device comprises an external housing (1), where at least one inlet (4) in the external housing (1) is connected to an outlet (5) through a longitudinal bore in the housing's (1) longitudinal direction. Furthermore, between the valve device's inlet and outlet (4, 5) there is mounted a valve seat (2) in the bore, where a valve body (3) shuts off the connection between the inlet and the outlet (4, 5). The valve body's (3) position is controlled by a support (20), which support (20) is connected with a pressure-sensitive bellows device (6) comprising an upper and a lower bellows element (7, 71). At a given external pressure, the lower bellows element (71) in the bellows device (6) will be compressed in the valve device's axial direction, whereby this compression causes the two bellows elements' (7, 71) impact elements to be moved relative to each other, thereby causing the valve body (3) to be lifted out of abutment with the valve (2).

La présente invention concerne un dispositif de soupape qui est utilisé en rapport avec des puits de pétrole et de gaz avec lobjectif daugmenter la production du puits. Le dispositif de soupape comprend un logement externe (1), au moins un orifice dadmission (4) du logement externe (1) étant connecté à un orifice de sortie (5) par lintermédiaire dun alésage longitudinal dans le sens longitudinal du logement (1). En outre, entre lorifice dadmission et lorifice de sortie (4, 5) du dispositif de soupape, un siège de soupape (2) est monté dans lalésage, un corps de soupape (3) fermant la connexion entre lorifice dadmission et lorifice de sortie (4, 5). La position du corps de soupape (3) est commandée par un support (20), lequel support (20) est raccordé à un dispositif à soufflets sensible à la pression (6) comprenant un élément à soufflets supérieur et inférieur (7, 71). A une pression externe donnée, lélément à soufflets inférieur (71) situé dans le dispositif à soufflets (6) sera comprimé dans le sens axial du dispositif à soufflets, cette compression amenant les éléments dimpact des deux éléments à soufflets (7, 71) à être déplacés les uns par rapport aux autres, amenant de ce fait le corps de soupape (3) à être soulevé hors de butée avec la soupape (2).

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