Drilling tool

E - Fixed Constructions – 02 – D

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E02D 17/13 (2006.01) E02F 3/20 (2006.01)

Patent

CA 2648498

Art 17.2

L' invention concerne un outillage de forage (12) comprenant : - deux paires de tambours rotatifs (72) coaxiaux à axes parallèles; des moyens moteurs (70) pour entra*ner lesdits tambours en rotation,- des moyens de sustentation (14),- et une structure support (34) sur laquelle sont montés, à rotation, lesdits tambours pour relier lesdits tambours aux moyens de sustentation; Lesdits moyens moteurs (70) sont montés à l'intérieur des tambours (72); ladite structure support comprend une plaque (42, 44) formant, à ses extrémités inférieures, des paliers (52 à 56) pour lesdits tambours; et une bride de raccordement (48) aux moyens de sustentation, la tranche supérieure de la plaque rejoignant ladite bride depuis les moyens formant paliers.

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