Method and apparatus for controlling elastomer swelling in...

E - Fixed Constructions – 21 – B

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E21B 33/12 (2006.01)

Patent

CA 2692592

A downhole tool includes a swellable core, and a coating that encapsulates the swellable core, wherein the coating is made of a material comprising a component soluble in a selected fluid and a component insoluble in the selected fluid. A method for controlling a downhole tool includes disposing a downhole tool in a wellbore, wherein the downhole tool includes a swellable core, and a coating that encapsulates the swellable core, wherein the coating is made of a material comprising a component soluble in a selected fluid and a component insoluble in the selected fluid; and exposing the swellable device to the selected fluid to increase the permeability of the coating to allow the swellable core to swell.

L'outil de fond de puits objet de la présente invention comprend une partie centrale gonflable et un revêtement qui enrobe cette partie centrale, le revêtement étant constitué d'un matériau comprenant un composant soluble dans un fluide donné ainsi qu'un composant insoluble dans ce même fluide. Un procédé destiné à contrôler un outil de fond de puits comprend l'installation de cet outil dans un puits de forage, cet outil de fond de puits comprenant une partie centrale gonflable et un revêtement qui enrobe cette partie centrale gonflable. Le revêtement est constitué d'un matériau comprenant un composant soluble dans un fluide donné ainsi qu'un composant insoluble dans ce même fluide. Le procédé consiste à mettre le dispositif gonflable dans ce fluide afin d'augmenter la perméabilité du revêtement afin que la partie centrale gonflable puisse gonfler.

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