Drill bits with anti-tracking features

• Main Authors: BRADFORD JOHN F, BUSKE ROBERT J
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2013
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

Drill bits (11) with at least two roller cones (21) of different diameters and/or utilizing different cutter pitches in order to reduce bit tracking during drilling operations are described. In particular, earth boring drill bits are provided, the bits having two or more roller cones, and optionally...