A low friction centralizer

Details A low friction centralizer A low friction centralizer

E - Fixed Constructions

21

B

E21B 17/10 (2006.01)

Patent

CA 2760670

A centralizer for a downhole system, such as but not limited to a casing system. In some embodiments, the centralizer has a tubular body and a plurality of roller ball assemblies circumferentially spaced about the tubular body. Each roller ball assembly includes a plurality of rotatable balls adapted to engage a surface radially offset from the centralizer and rotate relative to the surface in any direction.

L'invention porte sur un centreur pour un système de fond de trou tel que, mais sans y être limité, un système de tubage. Dans certains modes de réalisation, le centreur présente un corps tubulaire et une pluralité d'ensembles de boules roulantes espacées de manière circonférentielle autour du corps tubulaire. Chaque ensemble de boules roulantes comprend une pluralité de boules rotatives aptes à venir en contact avec une surface radialement décalée du centreur et à tourner dans n'importe quelle direction par rapport à la surface.

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