Lateral branch junction for well casing

Details Lateral branch junction for well casing Lateral branch junction for well casing

E - Fixed Constructions

21

B

E21B 17/08 (2006.01) E21B 17/00 (2006.01) E21B 17/02 (2006.01) E21B 41/00 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2351339

A well casing junction (11) connects an upper string of casing to a pair of lower or branch strings that diverge from each other. The junction tool has an upper section (13) and a pair of branch sections (25, 27) that join the upper section and each other. The junction tool is collapsed for running into the well along with casing. To collapse, a force is applied to opposite sides to create identical, deep depressions in the opposite sides of the junction tool. Once in position, internal pressure forces the depressions outward to assume an expanded position. A support member (35) locates at the junction and between the two branch sections.

L'invention concerne un embranchement (11) de tubage de puits reliant une colonne supérieure du tubage à deux colonnes inférieures ou d'embranchement divergentes. L'appareil d'embranchement comprend une section supérieure (13) et deux sections d'embranchement (25, 27) qui rejoignent la section supérieure et qui se rejoignent entre elles. L'appareil d'embranchement est comprimé afin d'être introduit dans le puits le long du tubage. Afin de comprimer cet appareil d'embranchement, une force est appliquée sur des côtés opposés, ce qui a pour effet de créer des dépressions profondes et identiques sur les côtés opposés de l'appareil d'embranchement. Lorsque l'appareil est en place, la pression intérieure pousse les dépressions vers l'extérieur et permet à l'appareil de se déployer. Un élément de support (35) est situé sur la jonction et entre les deux sections d'embranchement.

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