METHODS OF FORMING BODIES FOR EARTH-BORING DRILLING TOOLS COMPRISING MOLDING AND SINTERING TECHNIQUES, AND BODIES FOR EARTH-BORING TOOLS FORMED USING SUCH METHODS

Methods of fabricating bodies of earth-boring tools include mechanically injecting a powder mixture into a mold cavity, pressurizing the powder mixture within the mold cavity to form a green body, and sintering the green body to a desired final density to form at least a portion of a body of an eart...

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Bibliographische Detailangaben
1. Verfasser:	EASON, JIMMY W
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	Methods of fabricating bodies of earth-boring tools include mechanically injecting a powder mixture into a mold cavity, pressurizing the powder mixture within the mold cavity to form a green body, and sintering the green body to a desired final density to form at least a portion of a body of an earth-boring tool. For example, a green bit body may be injection molded, and the green bit body may be sintered to form at least a portion of a bit body of an earth-boring rotary drill bit. Intermediate structures formed during fabrication of an earth-boring tool include green bodies having a plurality of hard particles, a plurality of matrix particles comprising a metal matrix material, and an organic material that includes a long chain fatty acid derivative. Structures formed using the methods of fabrication are also disclosed. L'invention porte sur des méthodes de formation de corps d'outils de forage consistant à injecter mécaniquement un mélange de poudres dans la cavité d'un moule, pour former un corps de vert, puis à fritter le corps de vert jusqu'à la densité finale désirée pour former au moins une partie du corps de l'outil de forage. Par exemple, un corps de trépan de vert peut être moulé par injection, puis fritté pour former au moins une partie du corps d'un trépan de forage. Des structures intermédiaires formées pendant la fabrication d'un outil de forage comportent des corps de vert comportant des particules dures, des particules matrices à matrice de matériau métallique, et un matériau organique incluant des dérivés d'acide gras à chaîne longue. L'invention porte également sur des structures utilisant les susdites méthodes de fabrication.