Divergent bean for drilling tools; tool using said bean

Details Divergent bean for drilling tools; tool using said bean Divergent bean for drilling tools; tool using said bean

E - Fixed Constructions

21

B

E21B 10/18 (2006.01) E21B 10/60 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2078269

L'invention concerne une dure divergente pour outil de forge, et un outil utilisant une telle dose. La dure (22) a une paroi (16) qui diverge vers l'extérieur, l'angle de divergence (~) étant inférieur à 30°.

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