A bridge plug for use in a wellbore

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/129 (2006.01) E21B 33/12 (2006.01)

Patent

CA 2412167

A bridge plug (305) includes a cylindrical body (300) having a longitudinal bore (308). First and second lock ring assemblies (340, 360) are installed on the outer surface of the body and are designed to move in a single direction. A bi-directional slip member (310) to provide axial resistance in two directions and a sealing member (330) are located on the exterior of the body. The sealing member (330) is disposed between the lock ring assemblies (340, 360) and actuated by movement of the ring towards each other. The slip (310) is a circular with teeth on the outer surface arranged to break into segments with radial pressure. The slip is actuated by force from a sloped shoulder on a first end of the body and a sloped surface on the second lock ring assembly. Both lock ring assemblies move toward the shoulder, thereby setting the sealing member therebetween and setting the slip between the second lock ring assembly and the shoulder.

Un bouchon provisoire (305) comprend un corps cylindrique (300) comportant un trou foré longitudinal (308). Un premier et un deuxième ensembles de bague d'arrêt (340, 360) sont montés sur la surface externe du corps, chacun ne pouvant se déplacer que dans une seule direction. Un élément de glissement bidirectionnel (310) destiné à assurer la résistance axiale dans deux directions et un élément de scellement (330) sont disposés à l'extérieur du corps. L'élément de scellement (330) est disposé entre les ensembles de bague d'arrêt (340, 360) et actionné par le mouvement d'une bague vers l'autre. L'élément de glissement (310) est fait circulaire et comporte sur la surface externe des dents destinées à éclater en segments sous l'effet de la pression radiale. L'élément de glissement est activé par la force exercée par un épaulement incliné sur une première extrémité du corps et une surface inclinée sur le deuxième ensemble de bague d'arrêt. Les deux ensembles de bague d'arrêt se déplacent vers l'épaulement et, par ce mouvement, placent entre eux l'élément de scellement et placent l'élément de glissement entre le deuxième ensemble de bague d'arrêt et l'épaulement.

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