E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 23/01 (2006.01) E21B 49/10 (2006.01)
Patent
CA 2341060
A method and apparatus for anchoring a tool within a cased borehole wherein at least one piston connected with respect to the tool includes an associated anchor shoe. The anchor shoe has a penetration means, such as a plurality of wheels having a sharp outer periphery, for engagement with the cased borehole. A packer having a rigid component, such as a plurality of concentric rings, is connected with respect to the tool, opposite the piston. The packer may also have a sealing member for creating a sealed engagement between the tool and the cased borehole. When the piston is extended, the anchor shoe contacts the cased borehole and centers the tool with respect to the cased borehole. When the piston is extended, the packer also engages the cased borehole and maintains the position of the tool as well as creating a sealed connection between the tool and the cased borehole.
La présente invention concerne une méthode et un dispositif d'ancrage d'outils dans un trou foré et chemisé selon lesquels un piston relié à un outil est muni d'un patin d'ancrage connexe. Ce patin d'ancrage comporte un moyen de pénétration tel qu'un ensemble de roues aux bords extérieurs acérés faites pour mordre dans la paroi du trou chemisé. Un tampon comportant un élément rigide fait par exemple d'une pluralité d'anneaux concentriques est relié à l'outil sur le côté opposé au piston. Ce tampon peut également comporter un élément d'étanchéité assurant une liaison hermétique entre l'outil et le trou foré chemisé. Lorsque le piston est sorti, le patin d'ancrage touche la paroi du trou chemisé et centre l'outil par rapport au trou. Simultanément, le tampon entre en contact avec la paroi du trou et d'une part, maintient l'outil en position, d'autre part assure une liaison hermétique entre l'outil et la paroi du trou foré chemisé.
Flores Aaron G.
Flores Mario J.
Hinton Mark
Ratcliff John C.
Gas Research Institute
Gas Technology Institute
Macrae & Co.
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