Cutting structures for earth-boring drill bits

Details Cutting structures for earth-boring drill bits Cutting structures for earth-boring drill bits

E - Fixed Constructions

21

B

E21B 10/54 (2006.01) E21B 10/43 (2006.01) E21B 29/06 (2006.01)

Patent

CA 2701371

A drill bit (12) includes a bit body (14) having a face on which two different types of cutters are disposed (32, 36), the first type being cutting elements suitable for drilling (32) at least one subterranean formation and the second type (36) being at least one of an abrasive cutting structure and an abrasive cutting element suitable for drilling through a casing shoe, reamer shoe, casing bit, casing or liner string and cementing equipment or other components as well as cement. Methods of forming earth-boring tools are also disclosed.

L'invention concerne un foret comprenant un corps de foret ayant une face sur laquelle deux types différents de dispositifs de coupe sont disposés, le premier type étant des éléments de coupe appropriés pour le forage d'au moins une formation souterraine et le second type étant une structure de coupe abrasive et/ou un élément de coupe abrasif appropriés pour le forage dans un sabot de tubage, un sabot aléseur, un foret de tubage, une colonne de tubage et un équipement de cimentation ou d'autres composants de même que le ciment. Des procédés de formation d'outil de forage sont également décrits.

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