Restriction tolerant packer cup

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/126 (2006.01)

Patent

CA 2561349

The present invention relates to a packer cup (5) having a deformable leading edge (20) which moves away from well bore or casing obstructions as the packer cup (5) is moved into a well bore. The anaxisymmetric deformable leading edge (20) can be formed by an angled leading edge (19) which presents only a portion of the leading edge (18) to a well bore obstruction and allows the edge (19) to move past the obstruction with little or no longitudinal force. Another embodiment provides an anaxisymmetric deformable leading interior edge (72) which is unduloid providing alternatively stiff and deformable sections (74, 76) of the edge (72) to move past the obstructions.

La présente invention concerne une coupelle (5) de packer présentant un bord avant déformable (20) lequel s'écarte des obstructions d'un puits de forage ou d'un tubage à mesure que la coupelle (5) de packer est déplacée dans un puits de forage. Le bord avant (20) anaxisymétrique déformable peut être constitué d'un bord avant angulaire (19) lequel ne présente qu'une partie du bord avant (18) à une obstruction de puits de forage et permet au bord (19) de passer l'obstruction avec peu ou pas de force longitudinale. Un autre mode de réalisation prévoit un bord intérieur avant (72) anaxisymétrique déformable lequel est ondulé et présente des parties alternées rigides et déformables (74, 76) du bord (12) pour passer les obstructions.

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