Wellbore system and method of completing a wellbore

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/04 (2006.01) E21B 33/127 (2006.01)

Patent

CA 2681122

A wellbore system is provided comprising a borehole formed in an earth formation (10), the borehole having a borehole section containing a volume of gravel pack particles (26) and at least one body of a swellable material (22). Each body of swellable material (22) is adapted to expand from an unexpanded state to an expanded state upon contact of the swellable material with a selected fluid, wherein a flow passage (30) is present in said borehole section allowing fluid' to bypass the volume of gravel pack particles when the body of swellable material is in the. unexpanded state. The body of swellable material is arranged to substantially close the flow passage upon expansion of the body of swellable material to the expanded state.

La présente invention a pour objet un système de puits de forage comprenant un trou de forage formé dans une formation terrestre, le trou de forage comportant une section de trou de forage contenant un volume de particules d'agglomérats de gravier et au moins un corps d'un matériau pouvant gonfler. Chaque corps de matériau pouvant gonfler est adapté pour se dilater depuis un état non dilaté à un état dilaté lors du contact du matériau pouvant gonfler avec un fluide sélectionné, un passage d'écoulement étant présent dans ladite section de trou de forage permettant au fluide de contourner le volume de particules d'agglomérats de gravier lorsque le corps de matériau pouvant gonfler se trouve dans l'état non dilaté. Le corps de matériau pouvant gonfler est agencé pour fermer sensiblement le passage d'écoulement lors de la dilatation du corps de matériau pouvant gonfler à l'état dilaté.

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