Probe isolation seal pad

Details Probe isolation seal pad Probe isolation seal pad

E - Fixed Constructions

21

B

E21B 49/00 (2006.01)

Patent

CA 2554261

A seal pad comprising a base plate and an expandable material engaged with the base plate. The expandable material comprises an outer surface where a portion of the outer surface is used to form a seal against a borehole wall. A portion of the outer surface of the expandable material is expanded during the sealing against the borehole wall. The seal pad also comprises a retainer for controlling the expansion of the expandable material. The retainer controls the expansion of the expandable material by engaging at least a portion of the outer surface of the expandable material. Thus when the seal is formed by expanding the expandable material, at least a portion of the expandable material is contained by the retainer.

L'invention concerne un tampon d'étanchéité qui comprend une plaque support et un matériau expansible en contact avec la plaque support. Le matériau expansible comprend une surface extérieure dont une partie sert à former un joint contre une paroi de fond de trou. Une partie de la surface extérieure du matériau expansible est dilatée pendant la formation du joint contre la paroi de fond de trou. Ledit tampon d'étanchéité comprend également un élément de retenue qui permet de commander l'expansion du matériau expansible. L'élément de retenue commande l'expansion du matériau expansible par mise en contact d'au moins une partie de la surface extérieure du matériau expansible. Ainsi, lorsque le joint est formé par expansion du matériau expansible, au moins une partie de ce dernier est contenue par l'élément de retenue.

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