EARTH BORING TOOL WITH IMPROVED ARRANGEMENT OF CUTTER SIDE RAKES

• Main Authors: Murdock, Andrew David, Simmons, Rob A, Deen, Carl Aron
• Format: Patent
• Language: English; French; German
• Published: 21.10.2020
• 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

A rotary apparatus for earth boring operations has a body with a central axis, about which the apparatus rotates and a plurality of cutters arrayed on the body in fixed positions. The plurality of cutters collectively defines at least a portion of a cutting profile for the bit when it is rotated. Each of the group of cutters has a cutting face, a predetermined radial position within the cutting profile, and a predetermined side inclination angle. The plurality of cutters comprises a first group of at least two adjacent cutters, and a second group also of at least two adjacent cutters. The side inclination angles of the cutters in the first group change consecutively from one cutter to the next adjacent cutter in a first direction; and the side inclination angles of the cutters in the second group change consecutively from one cutter to the next adjacent cutter in a second direction opposite to the first direction.