Bonding agents for improved sintering of earth-boring tools,...

B - Operations – Transporting – 22 – F

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B22F 7/06 (2006.01) E21B 10/567 (2006.01)

Patent

CA 2694332

Methods for forming earth-boring tools include providing a metal or metal alloy bonding agent at an interface between a first element and a second element and sintering the first element, the second element, and the boding agent to form a bond between the first element and the second element at the interface. The methods may be used, for example, to bond together portions of a body of an earth-boring tool (which may facilitate, for example, the formation of cutting element pockets) or to bond cutting elements to a body of an earth-boring tool (e.g., a bit body of a fixed-cutter earth-boring drill bit or a cone of a roller cone earth-boring drill bit). At least partially formed earth-boring tools include a metal or metal alloy bonding agent at an interface between two or more elements, at least one of which may comprise a green or brown structure.

L'invention concerne des procédés de fabrication d'outils de forage qui comprennent la fourniture d'un agent de liaison en métal ou en alliage de métal à une interface entre un premier élément et un second élément et le frittage du premier élément, du second élément et de l'agent de liaison pour former une liaison entre le premier élément et le second élément à l'interface. Les procédés peuvent être utilisés, par exemple pour relier des parties du corps d'un outil de forage (ce qui peut faciliter, par exemple la création de poches d'élément de coupe) ou pour lier des éléments de coupe au corps d'un outil de forage (par exemple le corps de trépan d'un trépan de forage à dispositif de coupe fixe ou le cône d'un trépan de forage à cône à rouleau). Des outils de forage au moins partiellement fabriqués comprennent un agent de liaison en métal ou en alliage de métal à une interface entre au moins deux éléments, dont au moins un peut comporter une structure verte ou marron.

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