Cutter for a boring head

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/24 (2006.01) E21B 10/10 (2006.01) F16N 37/00 (2006.01)

Patent

CA 2210476

The present invention relates to a cutter (10) for a boring head, preferably a boring head for shaft drilling, wherein the cutter (10) is rotatably mounted, via a shaft (12) of the cutter (10), in a saddle secured to the boring head. Bearings (18, 20) are provided between the shaft (12) and an outer roller body (16) of the cutter (10) to make it possible for the roller body (16) to rotate relative to the shaft (12). Seals (33) are disposed between the shaft (12) and the roller body (16) and channels/bores (38, 48, 50, 66) are provided to introduce lubrication internally into the cutter (10). The shaft (12) has a center axis (14). The invention is characterized in that a device (70) for positioning of spacer means (42, 44), a lubrication channel (66) and a diaphragm (60) are provided in the shaft (12), substantially concentrically with the center axis (14), said device, channel and reservoir being provided to accommodate lubrication. The invention further relates to a method for filling a lubrication system.

L'invention concerne un trépan (10) destiné à une tête de forage, de préférence une tête de forage servant au perçage de puits. Le trépan est monté de façon à pouvoir opérer une rotation, sur une tige (12) dans un support fixé à la tête de forage. Des paliers (18, 20) sont prévus entre la tige (12) et un cylindre extérieur (16) du trépan pour permettre au cylindre (16) de tourner par rapport à la tige (12). Des dispositifs d'étanchéité (33) se trouvent entre la tige (12) et le cylindre (16) et des rainures/alésages (38, 48, 50, 66) permettent d'introduire du lubrifiant à l'intérieur du trépan (10). La tige (12) a un axe central (14). L'invention est caractérisée par le fait que la tige (12) comporte un dispositif (70) de positionnement des systèmes d'espacement (42, 44) une rainure de lubrification (66) et un diaphragme (60), disposés de façon sensiblement concentrique par rapport à l'axe central, le dispositif, la rainure et le réservoir étant destinés à permettre la lubrification. L'invention concerne également une méthode de remplissage d'un système de lubrification.

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