High-strength, high-toughness matrix bit bodies

Details High-strength, high-toughness matrix bit bodies High-strength, high-toughness matrix bit bodies

E - Fixed Constructions

21

B

E21B 10/46 (2006.01) B23B 51/00 (2006.01)

Patent

CA 2576072

A drill bit that includes a bit body formed from a matrix powder and at least one cutting element for engaging a formation, wherein the matrix powder included (a) stoichiometric tungsten carbide particles, (b) cemented tungsten carbide particles, and (c) cast tungsten carbide particles, and wherein after formation with the matrix powder, the bit has an erosion rate of less than 0.001 in/hr, a toughness of greater than 20 ksi(in0.5), and a transverse rupture strength of greater than 140 ksi is disclosed.

L'invention concerne un trépan qui comprend un corps de trépan à base d'une poudre matricielle et au moins un élément de découpage pour engager une formation. La poudre matricielle comprend (a) des particules de carbure de tungstène stoechiométriques, (b) des particules de carbure de tungstène collées et(c) des particules de carbure de tungstène en fonte. Après la formation au moyen de la poudre matricielle, le trépan a un taux d'érosion de moins de 0,001 in/hr, une rigidité supérieure à 20 ksi(in0,5) et une résistance à la rupture transversale supérieure à 140 ksi.

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