Well tool with circumferential variations on packing element

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/12 (2006.01) E21B 23/06 (2006.01)

Patent

CA 2680346

A well tool having an enhanced performance packing element assembly. A well tool includes a packing element assembly for sealingly engaging a surface, the assembly including a packing element having at least one circumferential variation. Another well tool includes a packing element assembly including a packing element and a backup ring, the packing element being configured to bias the backup ring into contact with a surface opposite a circumferential portion of the backup ring, while another circumferential portion does not contact the surface. A method of setting a well tool includes providing a packing element assembly with multiple packing elements, and setting the well tool by squeezing fluid from between the packing elements via a gap, and then closing off the gap.

L'invention concerne un outil de puits ayant un ensemble élément de garniture d'étanchéité avec une meilleure performance. Un outil de puits comprend un ensemble élément de garniture d'étanchéité destiné à venir en prise de manière étanche avec une surface, l'ensemble comprenant un élément de garniture d'étanchéité ayant au moins une variation circonférentielle. Un autre outil de puits comprend un ensemble élément de garniture d'étanchéité comprenant un élément de garniture d'étanchéité et une bague d'appui, l'élément de garniture d'étanchéité étant configuré pour ramener la bague d'appui en contact avec une surface opposée à une partie circonférentielle de la bague d'appui, tandis qu'une autre partie circonférentielle ne vient pas en contact avec la surface. Un procédé permettant de fixer un outil de puits comprend la fourniture d'un ensemble élément de garniture d'étanchéité avec de multiples éléments de garniture d'étanchéité, et l'établissement de l'outil de puits en comprimant un fluide depuis un espace situé entre les éléments de garniture, et ensuite en fermant l'espace.

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