Sand control screen having increased erosion and collapse...

Details Sand control screen having increased erosion and collapse... Sand control screen having increased erosion and collapse...

E - Fixed Constructions

21

B

E21B 43/08 (2006.01)

Patent

CA 2210598

ABSTRACT OF THE DISCLOSURE A screen provides increased erosion resistance and collapse resistance without uneconomical overcompensation and without requiring an increase in the screen's outer diameter. In a preferred embodiment, a sand control screen has a support material radially between a tubular base pipe and a filtering portion. The support material radially outwardly supports the filtering portion to help prevent radially inward collapse of the filtering portion. In another preferred embodiment, a screen has a coating applied to a filtering portion's exterior surface. The coating may alternatively or combinatively provide erosion resistance, radially inwardly retain a support material, and selectively vary flow through the filtering portion.

Cette invention concerne une crépine à résistance améliorée à l'érosion et à l'affaissement sans surcompensation onéreuse et sans avoir à augmenter le diamètre extérieur de la crépine. Dans une variante privilégiée, l'objet de l'invention sert à empêcher le passage du sable et comporte un matériau support disposé radialement entre une partie tubulaire et la partie filtrante. Le matériau support disposé radialement soutient la partie filtrante pour empêcher son affaisssement radial vers l'intérieur. Dans une variante privilégiée, la partie filtrante de la crépine est recouverte du côté extérieur d'un revêtement servant alternativement ou simultanément à rehausser la résistance à l'érosion, à retenir le matériau support radialement et vers l'intérieur et à varier sélectivement le débit d'écoulement à travers la partie filtrante.

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