Abstract: An earth-boring tool includes a body, blades extending longitudinally and generally radially from the body, and primary cutting elements located on each blade. The earth-boring tool may include a group of at least two adjacent blades comprising the primary cutting elements and one or more first shaped inserts located rotationally behind the primary cutting elements, and one or more additional blades comprising the primary cutting elements and one or more second shaped inserts located rotationally behind the primary cutting elements, the second shaped inserts exhibiting a greater exposure relative to the first shaped inserts. Distribution of the second shaped inserts relative to the longitudinal axis may be asymmetric with respect to the longitudinal axis of the body. Methods include drilling a subterranean formation including engaging a formation with the primary cutting elements, the first shaped inserts, and the second shaped inserts of the earth-boring tool.

Abstract: An earth-boring tool includes a body, blades extending longitudinally and generally radially from the body, and primary cutting elements located on each blade. The earth-boring tool may include a group of at least two adjacent blades comprising the primary cutting elements and one or more first shaped inserts located rotationally behind the primary cutting elements, and one or more additional blades comprising the primary cutting elements and one or more second shaped inserts located rotationally behind the primary cutting elements, the second shaped inserts exhibiting a greater exposure relative to the first shaped inserts. Distribution of the second shaped inserts relative to the longitudinal axis may be asymmetric with respect to the longitudinal axis of the body. Methods include drilling a subterranean formation including engaging a formation with the primary cutting elements, the first shaped inserts, and the second shaped inserts of the earth-boring tool.

Abstract: A chip breaker for use in a fixed-cutter, rotary-type drill bit used in drilling subterranean formations is disclosed. The chip breaker includes a knife-like protrusion positioned proximate a cutting element and adjacent or in a fluid course defined by the drill bit body. As formation chips, shavings, or cuttings are generated during drilling, the chips move over the protrusion and are split or scribed by the protrusion. Drilling fluid breaks the split or scribed chips away from the surface of the fluid course adjacent the cutting element and transports them through the junk slots. Additionally, chip splitters may be positioned on ramped surfaces that further lift the formation chips away from the surface of the fluid course.