Methods and apparatus for reverse circulation cementing of...

E - Fixed Constructions – 21 – B

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E21B 33/02 (2006.01) E21B 33/03 (2006.01) E21B 33/04 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2663358

Methods and devices for completion of well bores and more particularly, to reverse circulation cementing of casing strings in well bores are provided. One example of a method may comprise a method for providing fiuidic access to an outer annulus of a casing string within a well bore. One example of a device may comprise a casing hanger (110), the casing hanger comprising a fluid port (120) wherein the fluid port provides fiuidic access to an outer annulus (150) by allowing fluid to pass through the casing hanger; a landing sub (130) attached to the casing hanger; and an isolation device (140) attached to the landing sub wherein the isolation device is adapted to allow fiuidic isolation of a portionof the landing sub from a portion of the outer annulus of the well bore.

L'invention concerne des procédés et des dispositifs pour l'achèvement de puits de forage et plus particulièrement, de cimentation à circulation inverse de colonnes de tubage dans des puits de forage. Un exemple d'un procédé peut comprendre un procédé permettant de fournir un accès fluidique à un espace annulaire extérieur d'une colonne de tubage à l'intérieur d'un puits de forage. Un exemple d'un dispositif peut comprendre une suspension de tubage (110), la suspension de tubage comprenant un orifice pour fluide (120), où l'orifice pour fluide fournit un accès fluidique à un espace annulaire extérieur (150) en permettant au fluide de passer à travers la suspension de tubage ; un raccord double femelle à portée intérieure (130) rattaché à la suspension de tubage ; et un dispositif d'isolation (140) rattaché au raccord double femelle à portée intérieure, où le dispositif d'isolation est conçu de sorte à permettre l'isolation fluidique d'une partie du raccord double femelle à portée intérieure de la partie de l'espace annulaire extérieur du puits de forage.

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