Tubing anchor

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/10 (2006.01) B21D 17/04 (2006.01) B21D 39/04 (2006.01) B21D 39/10 (2006.01) E21B 29/00 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2356184

A method of installing a liner in a drilled bore below a section of bore previously lined with casing comprises the steps of: running a length of liner into the bore such that at least an upper end of the liner is positioned in overlapping relation with at least a lower end of the casing; and plastically deforming a portion of the liner such that an external face of the portion forms an interference fit with an internal face of a portion of the casing. The interference fit preferably provides both hanging support for the liner and a fluid-tight seal between the liner and casing.

L'invention concerne un procédé d'installation d'une colonne perdue dans un trou de forage, au-dessous du trou préalablement recouvert d'un tubage de revêtement. Ce procédé consiste à placer une longueur de colonne perdue dans le trou de forage de telle sorte qu'au moins une extrémité supérieure de la colonne perdue soit positionnée de manière à chevaucher au moins une extrémité inférieure du tubage. Ce procédé consiste ensuite à déformer de manière plastique une partie de la colonne perdue de telle sorte qu'une face externe de la partie assure un ajustement avec serrage avec une face interne d'une partie du tubage de revêtement. Cet ajustement constitue, de préférence, un support de la colonne perdue et assure une étanchéité aux fluides entre la colonne perdue et le tubage.

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