Particle control screen with depth filtration

Details Particle control screen with depth filtration Particle control screen with depth filtration

E - Fixed Constructions

21

B

E21B 43/08 (2006.01)

Patent

CA 2603333

A particle control screen includes a support layer. A first filter layer is disposed around the support layer. A second filter layer is disposed around the first filter layer. A third filter layer is disposed around the second filter layer. Each of the filter layers has a pore size. The pore size of the third filter layer is greater than the pore size of the second filter layer. The pore size of the second filter layer is greater than the pore size of the first filter layer.

La présente invention concerne un tamis de régulation de particules qui comprend une couche support. Une première couche filtrante est disposée autour de la couche support. Une deuxième couche filtrante est placée autour de la première couche filtrante. Une troisième couche filtrante entoure à son tour la deuxième couche filtrante. Chaque couche filtrante possède sa propre taille de pore. La taille de pore de la troisième couche filtrante est supérieure à celle de la deuxième couche filtrante. La taille de pore de la deuxième couche filtrante est supérieure à la taille de pore de la première couche filtrante.

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