System for sealing an annular space in a wellbore

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/127 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2557200

A system is disclosed for sealing an annular space between a tubular element (7) extending into a wellbore (1) and a cylindrical wall (1b) surrounding the tubular element, wherein a control line (18) for controlling a downhole device (12, 13, 14, 15) extends in longitudinal direction along the tubular element. The system comprises an annular seal layer (20) extending around the tubular element (7), the seal layer having an inner surface provided with a recess (40) for radially receiving the control line. The seal layer is provided with a longitudinal slit (31) defining a pair of opposite longitudinal edges (32, 34) which are movable relative to each other between an open position wherein the seal layer can be radially applied to the tubular element, and a closed position wherein the seal layer extends around the tubular element.

La présente invention concerne un système pour rendre étanche un espace annulaire entre un élément tubulaire (7) qui s'étend dans un trou de forage (1) et une paroi cylindrique (1b) qui entoure l'élément tubulaire. Une ligne de commande (18) conçue pour commander un dispositif de fond (12, 13, 14, 15) s'étend dans la direction longitudinale le long de l'élément tubulaire. Le système comprend une couche de joint annulaire (20) qui s'étend autour de l'élément tubulaire (7) et qui présente une surface interne avec un creux (40) permettant de recevoir la ligne de commande en direction radiale. La couche de joint présente une fente longitudinale (31) qui définit une paire de bords longitudinaux opposés (32, 34) pouvant se déplacer les uns par rapport aux autres entre une position ouverte, dans laquelle la couche de joint peut être appliquée sur l'élément tubulaire en direction radiale, et une position fermée, dans laquelle la couche de joint s'étend autour de l'élément tubulaire.

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