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Rotary drill bit and method for designing a rotary drill bit for directional and horizontal drilling
Rotary drill bit and method for designing a rotary drill bit for directional and horizontal drilling
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机译:旋转钻头和设计用于定向和水平钻孔的旋转钻头的方法
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摘要
A multi-layer downhole drilling tool designed for directional and horizontal drilling is disclosed. The drilling tool includes a bit body including a rotational axis extending therethrough. A plurality of primary blades are disposed on exterior portions of the bit body and a plurality of secondary blades are disposed on exterior portions of the bit body between the primary blades. The drilling tool further includes a plurality of first-layer cutting elements disposed on exterior portions of the primary blades and a plurality of second-layer cutting elements disposed on exterior portions of the secondary blades. The second-layer cutting elements are track set with the first-layer cutting elements in an opposite track set configuration.
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