Self-conforming screen

Details Self-conforming screen Self-conforming screen

E - Fixed Constructions

21

B

E21B 43/08 (2006.01)

Patent

CA 2604236

A screen assembly has a material that conforms to the borehole shape after insertion. The assembly comprises a compliant layer that takes the borehole shape on expansion. The outer layer is formed having holes to permit production flow. The material that is selected preferably swells with heat and preferably comprises a shape memory foam that is thermoset. The base pipe can have a screen over it to act as an underlayment for support of the conforming layer or alternatively for screening. The conforming layer can expand by itself or expansion can also occur from within the base pipe.

L'invention porte sur un ensemble crépine possédant un matériau qui épouse la forme du trou de forage après insertion. L'ensemble comprend une couche élastique qui prend la forme du trou de forage lors de sa dilatation. La couche extérieure, comportant des trous, est conçue pour permettre l'écoulement de la production. Le matériau sélectionné, de préférence, gonfle à la chaleur et comprend une mousse à mémoire de forme qui est termodurcie. Le tuyau de base peut-être recouvert d'une crépine de façon à agir comme sous-couche pour le support de la couche élastique ou, alternativement, pour le filtrage. La couche élastique peut se dilater par elle-même ou la dilatation peut également se produire depuis l'intérieur du tuyau de base.

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