Cutting element insert for backup cutters in rotary drill...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/573 (2006.01)

Patent

CA 2660854

Cutter inserts for rotary drill bits include a cutter insert body (50) having a cutter recess (54) configured to receive a backup cutter therein (18). Rotary drill bits for drilling a subterranean formation include at least one such cutter insert affixed to a blade (14) rotationally behind a cutter pocket for a primary cutter. Methods of manufacturing such drill bits include providing a bit body (12) having a plurality of blades (14). A cutter insert (50) is provided and secured within a cutter insert recess (54) formed in the face of a blade (14). A backup cutter (18) is secured within a cutter recess (54) of the cutter insert.

La présente invention concerne des inserts de dispositifs de coupe pour des trépans rotatifs comportant un corps d'insert avec un évidement de dispositif de coupe configuré pour recevoir un dispositif de coupe de réserve. L'invention concerne également des trèpans rotatifs permettant le forage d'une formation souterraine comportant au moins un tel insert de dispositif de coupe fixé à une lame en rotation à l'arrière d'un logement de dispositif de coupe pour un dispositif de coupe principal. L'invention concerne en outre des procédés de fabrication de tels trépans fournissant un corps d'outil de forage ayant une pluralité de lames. L'invention concerne en outre un insert de dispositif de coupe fixé dans un évidement d'insert de dispositif de coupe formé dans la face d'une lame. L'invention concerne enfin un dispositif de coupe de réserve fixé dans un évidement de dispositif de coupe de l'insert de dispositif de coupe.

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