Rolling cone bit

• Main Authors: JAMES CARL MINIKUS, GARY EDWARD GARCIA, DENNIS CISNEROS, GARY RAY PORTWOOD, CHRIS EDWARD CAWTHORNE, PER IVAR NESE
• Format: Patent
• Language: English
• Published: 01.11.2000
• Edition: 7
• 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

An earth-boring bit (10) has a bit body having a bit axis and at least one rolling cone cutter rotatably mounted on said bit body. A first plurality of cutter elements (60) is positioned on a heel surface in a first circumferential row. A second plurality of cutter elements (140) is positioned on said cone cutter in a second circumferential row. A third plurality of cutter elements (150) is positioned on said cone cutter in a third circumferential row that is spaced apart from said second row. Said second plurality of cutter elements (140) and said third plurality of cutter elements (150) cooperatively cut the corner of the borehole and said second plurality of cutter elements (140) primarily cut the borehole sidewall and said third plurality of cutter elements (150) primarily cut the borehole bottom when the bit is unworn.