Packer

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/128 (2006.01) G01M 3/28 (2006.01)

Patent

CA 2297652

A packer comprises an elastomeric member (2) which, in use, will deform radially when subjected to axial pressure. A plurality of steel fingers (3, 4) are vulcanized onto the elastomeric member (2). One end of each steel finger (3, 4) is accomodated in a recess in a bearing ring (5). The cross section of the fingers (3, 4) is generally wedge-shaped so that, when axial pressure is applied to the elastomeric member (2), the fingers (3, 4) pivot outwardly yet completely circumscribe the sealing member (2). The packer is particularly useful for applications where the packer must pass through a relatively narrow opening yet seal a relatively wide tubular.

L'invention concerne un packer comportant un élément élastomère (2) qui, lors de l'utilisation, se déforme radialement lorsqu'il est soumis à une pression axiale. Plusieurs doigts (3, 4) en acier sont vulcanisés sur l'élément élastomère (2). Une extrémité de chaque doigt (3, 4) en acier est logée dans un évidement pratiqué dans un anneau de support (5). La coupe transversale des doigts (3, 4) est généralement cunéiforme, de manière que, lorsqu'on exerce une pression axiale sur l'élément élastomère (2), les doigts (3, 4) pivotent vers l'extérieur tout en entourant complètement l'élément d'étanchéité (2). Le packer est particulièrement utile dans des applications où le packer doit passer à travers une ouverture relativement étroite tout en rendant étanche un tuyau relativement large.

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