Wellbore cleaning tool and method

Details Wellbore cleaning tool and method Wellbore cleaning tool and method

E - Fixed Constructions

21

B

E21B 37/00 (2006.01)

Patent

CA 2606782

There is disclosed a cleaning tool for use in cleaning ferrous material from a wellbore, a cleaning assembly comprising a plurality of such wellbore cleaning tools, and a method of cleaning ferrous materials from a wellbore. In one embodiment, a cleaning tool (12) is disclosed which comprises a tool main body (19) and a number of magnets (20) mounted for selective movement relative to the main body between deactivated and activated positions. When in the activated positions, the magnets serve for attracting ferrous material present in a wellbore (10), to collect such material during passage of the tool along the wellbore, so that the ferrous material may be returned to surface to thereby clean the wellbore.

L'invention concerne un outil de nettoyage utilisé dans le nettoyage de matière ferreuse provenant d'un puits de forage, un ensemble de nettoyage renfermant une pluralité de tels outils de nettoyage, et un procédé de nettoyage de matières ferreuses provenant d'un puits de forage. Dans un mode de réalisation, un outil de nettoyage (12) comporte un corps principal d'outil (19) et un certain nombre d'aimants (20) montés en vue de réaliser un mouvement sélectif par rapport au corps principal entre des positions désactivées et activées. Lorsqu'ils se trouvent dans des positions activées, les aimants servent à attirer la matière ferreuse présente dans un puits de forage (10) afin de recueillir ladite matière au cours du passage de l'outil le long du puits de forage, de telle façon que ladite matière ferreuse peut être ramenée à la surface, ce qui permet de nettoyer ledit puits de forage.

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