Downhole polymer plug and liner and methods employing same

Details Downhole polymer plug and liner and methods employing same Downhole polymer plug and liner and methods employing same

E - Fixed Constructions

21

B

E21B 33/12 (2006.01) E21B 29/10 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2521523

A method of sealing an inner surface of a wellbore, said method comprising the steps of: providing a member having a preselected shape with a diametrical dimension and an axial dimension, said member being constructed of a material in which stored energy may be imparted and subsequently recovered at least in pan; subjecting said member to forces causing a reduction in said diametrical dimension and an increase in said axial dimension while imparting stored energy in said member; lowering said member into the wellbore to a desired location; and subjecting said member to conditions in the wellbore at said desired location to cause at least partial release of said stored energy and allow said member to expand to sealingly engage the inner surface of the wellbore at the desired location. TH1863 FF ERM 21

L'invention concerne un procédé pour sceller la surface intérieure d'un puits, ce procédé comportant les étapes suivantes : préparer un élément de forme déterminée, présentant une dimension diamétrale et une dimension axiale, cet élément étant composé d'un matériau dans lequel l'énergie stockée peut être communiquée et récupérée ultérieurement, au moins en partie ; exercer sur cet élément des forces qui provoquent une diminution de sa dimension diamétrale et une augmentation de sa dimension axiale en communiquant l'énergie stockée dans ledit élément ; descendre l'élément dans le puits en un emplacement donné ; soumettre cet élément aux conditions du puits à l'emplacement donné pour provoquer au moins une libération partielle de l'énergie stockée et donc l'expansion de l'élément, lequel se solidarise alors de manière étanche avec la surface intérieure du puits à l'emplacement donné.

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