Friction reducing tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/10 (2006.01)

Patent

CA 2283847

A friction reducing tool for drilling applications having a plurality of rollers for about the periphery of the tool. The rollers have extensions which locate within cavities to prevent the rollers from passing from cavity to the exterior of the tool. The tool is formed in multiple parts having interengaging tongues which are joined together by passing a rod through bore. A groove is provided in outer component to enable rod to be inserted in bore.

Cet outil de réduction de friction, destiné à des applications de forage, présente une pluralité de rouleaux conçus pour être placés autour de la périphérie de l'outil (3). Ces rouleaux (4) possèdent des extensions (7) que l'on place dans des cavités (8), afin d'empêcher les rouleaux de passer de la cavité (10) vers l'extérieur de l'outil. Cet outil est formé de plusieurs éléments (3a et 3b) comprenant des languettes (5, 6) qui s'imbriquent les unes dans les autres et que l'on assemble en faisant passer une tige (15) à travers un alésage (13). Une gorge (14) est ménagée dans une pièce extérieure (2) afin de permettre l'insertion de la tige (15) dans l'alésage (13).

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