E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/14 (2006.01) E21B 33/05 (2006.01)
Patent
CA 2557100
The present invention is directed to a removable surface pack-off device adapted for use in reverse cementing applications. The device includes a housing adapted to be mounted between the ends of an inner casing and an outer casing at or near the surface of a well and at least one fluid passage disposed within the housing, which is adapted to pass fluid, such as cement, from a location outside of the well into an annulus formed between the inner and outer casings. It also includes a first pressure-activated seal disposed between the inner casing and the housing and a second pressure-activated seal disposed between the outer casing and the housing. The device further includes an attachment assembly, which enables the device to be easily removed from the well.
La présente invention a trait à un dispositif de porte-garnitures complet amovible pour des applications de cimentation inverse. Le dispositif comporte un boîtier adapté pour être monté entre les extrémités d'un tubage interne au niveau ou à proximité de la surface d'un puits et au moins un passage de fluide disposé au sein du boîtier, qui est apte au passage de fluide, tel que du ciment, depuis un emplacement à l'extérieur du puits pour pénétrer dans un espace annulaire formé entre les tubages interne et externe. Le dispositif comporte également un premier joint d'étanchéité activé par la pression disposé entre le tubage interne et le boîtier et un deuxième joint d'étanchéité activé par la pression disposé entre le tubage externe et le boîtier. Le dispositif comporte en outre un ensemble de fixation, qui permet le retrait aisé du dispositif depuis le puits.
Rogers Henry E.
Webb Earl D.
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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