Tools and methods for use with expandable tubulars

Details Tools and methods for use with expandable tubulars Tools and methods for use with expandable tubulars

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 23/01 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2393744

In one aspect of the invention, tools are actuated or operated within a well by selectively expanding the tool wall. To actuate the tool, the tool wall (225) is urged outward past its elastic limits. The expanding wall physically unlocks a locking ring (280) which then ulocks a piston (260). Thereafter, hydraulic pressure difference are employed to move the piston to operate the down-hole tool. In another aspect of the invention, a first piece of casing is joined to a second, larger diameter casing. By expanding the diameter of the first piece of casing into contact with the second piece of casing, the two are joined together. The joint is formed with helical formations in a manner that provides flow paths around the intersection of the two members for the passage of cement or other fluid.

Dans l'un des aspects de l'invention, on actionne ou commande des outils dans un puits, par expansion sélective de la paroi de l'outil. Afin d'actionner l'outil, on exerce une pression sur la paroi de celui-ci (225), vers l'extérieur, au-delà de la limite élastique de la paroi, laquelle se dilate physiquement et débloque un anneau de blocage (280), lequel à son tour débloque un piston (260). Ensuite, on utilise la différence de pression hydraulique pour le déplacement du le piston(260), afin que celui-ci actionne l'outil fond de trou. Dans un autre aspect de l'invention, on assemble un premier élément de tubage à un second élément de tubage de diamètre supérieur. L'expansion du diamètre du premier élément de tubage provoque l'entrée en contact de celui-ci avec le second élément, les deux étant alors assemblés, cet assemblage s'effectuant au moyen de formations hélicoïdales, de façon à ménager, autour de l'intersection des deux éléments, des trajets d'écoulement servant au passage de ciment ou d'un autre fluide.

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