Drilling tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/18 (2006.01) E21B 10/60 (2006.01) E21B 17/10 (2006.01) E21B 21/12 (2006.01)

Patent

CA 2675842

The invention relates to a drilling tool for drilling soft and fragmented rock. The drilling tool disclosed in the invention comprises a portion (4) having a round cross section and a smooth surface and positioned substantially symmetrically relative to the middle axis of a drill rod (1) and comprising, at its end, a converging part (4a) through which conduits pass for rinsing medium.

L'invention porte sur un outil de forage pour forer une roche tendre et fragmentée. L'outil de forage décrit dans l'invention comprend une partie (4) munie d'une coupe transversale arrondie et une surface lisse et positionnée sensiblement symétriquement par rapport à l'axe moyen d'une tige de forage (1) dont l'extrémité est munie d'une partie convergente (4a) traversée par des conduits passent qui permet de rincer le milieu.

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