Rock bit with improved gage insert
US5201376A · kind A · utility
57Cited by
15References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1992 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Apr 22, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cutter rock bit includes a cutter constructed with a relief adjacent the cutter heel and gage inserts which each include elongated gage and bottom hole cutting edges which are separated from each other by an obtuse included angle. The edges serve to cut both the bottom of the borehole and the wall when changing the direction of drilling. Both the gage cutting edge and the bottom cutting edge of each gage insert are shaped so as to aggressively cut formation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.