Apparatus and methods of milling a restricted casing shoe

E - Fixed Constructions – 21 – B

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E21B 10/26 (2006.01) E21B 10/32 (2006.01) E21B 29/10 (2006.01)

Patent

CA 2682316

A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the reamer at a location below the restriction; and urging the reamer back toward the restriction to remove the restriction.

L'invention concerne un procédé de retrait d'une obstruction dans un matériel tubulaire situé dans un puits, lequel procédé comprend la fourniture d'un ensemble de forage avec un trépan et un aléseur, l'aléseur ayant une structure de découpe pour retirer l'obstruction ; le forage à travers une partie inférieure du matériel tubulaire ; l'expansion de l'aléseur à un emplacement en dessous de l'obstruction ; et la sollicitation de l'aléseur à nouveau vers l'obstruction pour la retirer.

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