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CUTTING ELEMENT INSERT FOR BACKUP CUTTERS IN ROTARY DRILL BITS, ROTARY DRILL BITS SO EQUIPPED, AND METHODS OF MANUFACTURE THEREFOR
CUTTING ELEMENT INSERT FOR BACKUP CUTTERS IN ROTARY DRILL BITS, ROTARY DRILL BITS SO EQUIPPED, AND METHODS OF MANUFACTURE THEREFOR
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机译:旋转钻头中备有切刀的切割元件插入件,如此配备的旋转钻头及其制造方法
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摘要
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.
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