Drillable inflatable packer and methods of use

E - Fixed Constructions – 21 – B

Patent

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Details

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

Patent

CA 2458454

A method for reclaiming a borehole extending from an earth surface into the earth, part of which borehole is in a lost circulation zone, includes closing off the borehole to fluid flow above the lost circulation zone by installing a packer system with an inflatable packer element, a plurality of ribs (304) mounted around the inflatable packer element, and a valve apparatus (120) in the borehole above the lost circulation zone, the packer system being made of drillable material, 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.

Cette invention se rapporte à un procédé servant à régénérer un trou de forage s'étendant depuis la surface du sol jusque dans un sol, une partie de ce trou de forage étant située dans une zone de fuites. Ce procédé consiste à fermer le trou de forage à l'écoulement de fluide au-dessus de la zone de fuites, en plaçant un système de packer comportant un élément de packer gonflable, plusieurs membrures (304) montées autour de l'élément de packer gonflable, et un appareil à soupape (120) placé dans le trou de forage au-dessus de la zone de fuites. Ce système de packer est constitué d'un matériau forable, ledit procédé consistant alors à gonfler l'élément de packer gonflable avec du ciment et à laisser durcir le ciment, pour que le packer gonflable et l'appareil à soupape viennent fermer efficacement de façon étanche le trou de forage à tout écoulement de fluide.

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