E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/14 (2006.01)
Patent
CA 2672782
A method for selectively closing a downhole one way check valve (7), the method having the following steps: attaching the valve (7) to a casing (26); locking the valve in an open configuration; running the casing (26) and the valve into the wellbore; reverse circulating a composition down an annulus defined between the casing and the wellbore; injecting a plurality of balls (15) into the annulus; unlocking the valve with the plurality of balls; and closing the valve.
La présente invention concerne un procédé permettant de fermer sélectivement une soupape de retenue unidirectionnelle de fond de puits (7), le procédé comprenant les étapes suivantes : fixer la soupape (7) à un tubage (26) ; verrouiller la soupape en configuration ouverte ; faire passer le tubage (26) et la soupape dans le puits de forage ; faire circuler inversement une composition à travers un espace annulaire défini entre le tubage et le puits de forage ; injecter une pluralité de billes (15) dans l'espace annulaire ; déverrouiller la soupape avec la pluralité de billes ; et fermer la soupape.
Branch Alton
Winslow Donald
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
LandOfFree
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