Filter for subterranean wells

Details Filter for subterranean wells Filter for subterranean wells

E - Fixed Constructions

21

B

E21B 43/02 (2006.01) B01D 29/11 (2006.01) B01D 35/26 (2006.01) B01D 39/20 (2006.01) E21B 29/10 (2006.01) E21B 43/08 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2207372

A damage-resistant filter for use in subterranean wells has at least one layer of a filter medium (13), such as a sintered supported porous membrane, coaxially disposed about a perforated support member (11). The filter may also include a drainage layer (15) disposed between the inner support member and the filter medium, and a protective covering, such as a perforated cage (17), surrounding the filter medium (13). The filter is particularly suitable for removal of sand and other particulates from fluids produced in a well.

La présente invention concerne un filtre, résistant aux détériorations, destiné à des puits souterrains, lequel comporte au moins une couche d'un milieu filtrant (13), telle qu'une membrane poreuse de matière frittée avec support, placée de manière coaxiale autour d'un élément de support perforé (11). Ce filtre peut aussi comporter une couche de drainage (15) placée entre l'élément de support intérieur et le milieu filtrant, et un revêtement protecteur, tel qu'une cage perforée (17), entourant le milieu filtrant (13). Ce filtre convient particulièrement à l'extraction de sable ou d'autres particules des fluides produits dans un puits.

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