High performance well drilling tool with fast milling of the...

E - Fixed Constructions – 21 – B

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E21B 10/00 (2006.01) E21B 10/04 (2006.01) E21B 10/26 (2006.01) E21B 10/46 (2006.01)

Patent

CA 1108596

PRECIS DE LA DIVULGATION: Outil de forage dont le front d'attaque extrême s'ef- fectue hors de son axe de rotation, caractérisé en ce qu'il com- porte, à l'extrémité de cet axe de rotation, un cône de forage de la carotte centrale formée à l'intérieur du front d'attaque.

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