Drillable inflatable packer and methods of use

Details Drillable inflatable packer and methods of use Drillable inflatable packer and methods of use

E - Fixed Constructions

21

B

E21B 33/127 (2006.01) E21B 23/06 (2006.01) E21B 33/12 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2387592

An inflatable packer with a packer body, an inflatable bladder mounted around the packer body, a bladder support mounted around the inflatable bladder, the packer body, the inflatable bladder and the bladder support made of drillable material. A method for reclaiming a borehole extending from an earth surface into the earth, part of which is in a lost circulation zone, the method including closing off the borehole to fluid flow above the lost circulation zone by installing a packer system with an inflatable packer element and a valve apparatus in the borehole above the lost circulation zone, inflating the inflatable packer element with cement, and allowing the cement to set so that the inflatable packer and the valve apparatus effectively seal off the borehole to fluid flow.

L'invention porte sur une garniture d'étanchéité gonflable constituée d'un corps (42), d'une vessie (44) gonflable montée autour du corps, d'un support (45) monté autour de la vessie gonflable, le corps, la vessie et le support étant formés dans un matériau forable. Ce procédé est destiné à revaloriser un puits de forage s'étendant depuis la surface du sol jusqu'à une certaine profondeur et dont une partie se trouve dans une zone de perte de circulation. Le procédé consiste à fermer le puits de forage à l'écoulement de fluide s'effectuant au-dessus de la zone de perte de circulation en y installant un système de garniture d'étanchéité pourvu d'un élément gonflable et un ensemble vanne au-dessus de la zone de perte de circulation, gonfler l'élément gonflable avec du ciment et laisser prendre le ciment de sorte que la garniture d'étanchéité gonflable et l'ensemble vanne colmatent hermétiquement et efficacement le puits de forage et bloquent l'écoulement du fluide.

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