Pump in reverse outliner drilling system

E - Fixed Constructions – 21 – B

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Details

E21B 43/10 (2006.01) E21B 23/00 (2006.01)

Patent

CA 2761019

A liner string for a well has a liner hanger assembly at an upper portion of the liner string. A profile sub is located at a bottom portion of the liner string. A bottom hole assembly is latched to the profile sub. The operator lowers the liner string into the well with a drill pipe string and rotates the drill pipe string to rotate the drill bit to deepen the well. At a selected depth, the operator releases the bottom hole assembly from the profile sub and reverse circulates drilling fluid from a liner annulus surrounding the liner string, pumping the bottom hole assembly up the liner string. When the bottom hole assembly reaches the lower end of the drill pipe string, it latches to a catcher tool located at the lower end of the drill pipe string. The operator moves the liner hanger assembly into setting engagement with the casing string, releases the drill pipe string from the liner string, and retrieves the drill pipe string along with the bottom hole assembly.

Un train de tiges pour puits comprend un ensemble de dispositif à suspension à sa partie supérieure. Un raccord double femelle est disposé au bas du train de tiges. Un ensemble de fond de trou est verrouillé au raccord double femelle. L'opérateur abaisse le train de tiges dans le puits et le fait tourner pour entraîner le trépan et augmenter la profondeur du puits. A une profondeur déterminée, l'opérateur libère l'ensemble de fond de trou du raccord double femelle et fait circuler en sens inverse le fluide de forage à provenant d'un anneau de chemise entourant le train de tiges, ce qui fait remonter par aspiration l'ensemble fond de trou vers le train de tiges. Une fois à hauteur de l'extrémité inférieure du train de tiges, l'ensemble de fond de trou s'y verrouille. L'opérateur déplace l'ensemble de dispositif à suspension en position d'engagement avec le train de tiges, libère la colonne de tubage et récupère cette dernière ainsi que l'ensemble fond de trou.

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