Anti-whirl drill bit
US5979576A · kind A · utility
57Cited by
12References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/43
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An anti-whirl rotary drag bit including one or more cutters, wear knots or other support structures disposed on the flank of a bit profile in a normally cutter-devoid region of the profile adjacent the gage of the bit in the circumferential segment of the gage used as a bearing zone for the bit to ride against the side of the bore hole. Such flank cutters or other structures reduce wear of the bearing zone but, due to their placement, do not come into play except under certain drilling situations such as reaming or high rates of penetration wherein whirl tendencies resulting from cutting forces are not as pronounced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.