E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/10 (2006.01)
Patent
CA 2684913
An apparatus (10) for expanding tubular elements (12), comprises a tool body (IS); an axially compressible expansion body (34) mounted on the tool body such that the outer surface of the expansion body is substantially the same outer diameter as that of the tool body; and means (30, 26) for axially compressing the expansion body such that its outer surface is expanded beyond the outer diameter of the tool body. A method for expanding tubular elements, comprises positioning an apparatus as claimed in any preceding claim at a predetermined position in the tubular element; and compressing the expansion body such that its outer surface expands against the inner wall of the tubular element and causes it to expand and deform permanently. The invention relates further to various applications of the apparatus for expanding tubular elements.
La présente invention concerne un appareil utilisé pour étirer des éléments tubulaires, cet appareil comprenant un corps principal, un corps extensible axialement compressible installé sur le corps principal de sorte que la surface externe du corps extensible ait sensiblement le même diamètre que celui du corps principal et un moyen de compression axiale du corps extensible de sorte que sa surface externe s'étire au-delà du diamètre externe du corps principal. Un procédé d'étirement d'éléments tubulaires consiste à positionner un appareil tel que celui décrit dans les revendications, à un endroit prédéterminé dans l'élément tubulaire et à comprimer le corps extensible de sorte que sa surface externe s'étire et vienne toucher la paroi interne de l'élément tubulaire et provoque ainsi son étirement et sa déformation permanente. Cette invention porte également sur diverses applications de l'appareil en vue d'étirer des éléments tubulaires.
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