Sealing off openings through the wall of a well tubular

Details Sealing off openings through the wall of a well tubular Sealing off openings through the wall of a well tubular

E - Fixed Constructions

21

B

E21B 29/10 (2006.01) E21B 33/124 (2006.01) E21B 33/128 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2392147

A device (1) for sealing off an opening (5, 6) through the wall of a well tubular (2), which device comprises a tubular spacer (10) having an outer diameter allowing the spacer to be arranged in the well tubular, a first seal collar (11) assembly and a second seal collar (12) assembly arranged opposite ends of the tubular spacer, each seal collar assembly comprising an activator ring (15, 16) and an annular seal collar (17, 18), the activator rings being interconnected by a cylindrical system (20) of shape memory alloy which system contracts when the temperature of the cylindrical system reaches the transition temperature of the shape memory alloy, and wherein each annular seal collar is arranged so as to be compressed against the inner surface of the well tubular upon contraction of the cylindrical system (20) of shape memory alloy. Image

L'invention concerne un dispositif destiné à colmater une ouverture dans la paroi d'un tubage de puits, comportant un espaceur de tubage ayant un diamètre extérieur permettant de disposer l'espaceur dans le tubage de puits, et un premier et un deuxième ensemble de collier de colmatage disposés sur les extrémités opposées de l'espaceur de tubage, chaque ensemble de collier de colmatage comportant un anneau d'activateur et un collier de colmatage annulaire, les anneaux de colmatage étant interconnectés par un système cylindrique réalisé en alliage à mémoire de forme se contractant lorsque la température du système cylindrique atteint la température de transition de l'alliage à mémoire de forme, et chaque collier de colmatage annulaire étant disposé de manière à être comprimé contre la surface intérieure du tubage de puits lorsque le système cylindrique en alliage à mémoire de forme se contracte.

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