Improved downhole tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 31/06 (2006.01) B08B 9/04 (2006.01) E21B 37/00 (2006.01)

Patent

CA 2730481

A cleaning tool (1) for use in cleaning ferrous material from a wellbore has a magnetic cleaning element (14) mounted to a tool body (2) within a slot (5) using a releasable concealed interference fit fastener assembly (15) comprising a fas-tener member having a head (16), and a shank (17) with a configured end (18) and a deformable fastener ring (20) adapted to fit closely over the shank, and a press-fit collar (21) adapted to deform the deformable fastener ring upon the configured end of the shank when assembled, and wherein the respective head and collar are each flanged to permit an interference fit with a corre-sponding contact surface of the tool body around said slot

Outil de nettoyage (1) à utiliser pour enlever une matière ferreuse d'un trou de forage, comprenant un élément de nettoyage magnétique (14) monté sur un corps d'outil (2) à l'intérieur d'une fente (5) en utilisant un ensemble de fixation à ajustement serré détachable masqué (15) comprenant un élément de fixation présentant une tête (16), et une tige (17) ayant une extrémité en forme de 5 (18), et un anneau de fixation déformable (20) conçu pour s'adapter étroitement sur la tige, et un collier à ajustement par serrage (21) conçu pour déformer l'anneau de fixation déformable sur l'extrémité configurée de la tige une fois assemblé, et dans lequel la tête et le collier respectifs comprennent chacun une bride de manière à permettre un ajustement serré avec une surface de contact correspondante du corps d'outil (10) autour de ladite fente.

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