Isolateurs annulaires destines aux tubes dans les trous de forage

Annular isolators for tubulars in wellbores

Abstract

La présente invention concerne un appareil et des procédés pour former un isolateur annulaire dans un trou de forage (662) après l'installation d'un tube de production. Un premier isolateur annulaire déployable (652) est soutenu par le tube lorsqu'il est placé dans le trou de forage. Un matériau formant l'isolateur annulaire (650) est placé dans l'orifice annulaire autour du premier isolateur déployable. Le premier isolateur est ensuite déployé dans le matériau à l'intérieur de l'orifice annulaire pour former un isolateur combiné. Le matériau formant l'isolateur annulaire est soutenu dans un compartiment à l'intérieur du tube et poussé hors du compartiment dans l'orifice annulaire. Un deuxième isolateur déployable (664) peut être déployé avant que le matériau soit placé dans l'orifice annulaire pour résister au flux annulaire de matériau avant que le premier isolateur soit déployé. Le deuxième isolateur peut être déployé par le matériau provenant du compartiment. Un deuxième compartiment peut être prévu pour déployer le premier isolateur.
The present disclosure addresses apparatus and methods for forming an annular isolator in a borehole (662) after installation of production tubing. A first deployable annular isolator (652) is carried on tubing as it is positioned in a borehole. An annular isolator forming material (650) is placed in the annulus around the first deployable isolator. The first isolator is then deployed into the material in the annulus to form a combined isolator. The annular isolator forming material is carried in a compartment in the tubing and forced from the compartment into the annulus. A second deployable isolator (664) may be deployed before placing the material in the annulus to resist annular flow of the material before the first isolator is deployed. The second isolator may be deployed by material from the compartment. A second compartment may be provided to deploy the first isolator.

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