A well screen

Details A well screen A well screen

E - Fixed Constructions

21

B

E21B 43/08 (2006.01)

Patent

CA 2570314

A well screen (10) is proposed having an outer standoff layer (14) between the protective screen (15) and the filter medium (13). A method of making the well screen (10) is also proposed, comprising a step of pulling an open-ended cylinder of filter medium (13) over underlying layers (12) in the well screen (10). Furthermore, a method is proposed using series resistance welding for sealing seams in the layers making up the well screen (10).

La présente invention concerne un écran de puits (10) qui possède une couche de sécurité extérieure (14) entre l'écran de protection (15) et le milieu filtre (13). Cette invention concerne aussi un procédé de fabrication de cet écran de puits (10), qui consiste à tirer un cylindre à extrémité ouverte de milieu filtre (13) sur des couches sous-jacentes (12) dans l'écran de puits (10). Cette invention concerne encore un procédé qui utilise une soudure de résistances en série de façon à étanchéifier les raccords dans les couches constituant cet écran de puits (10).

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