Drill bits and tools for subterranean drilling
US7836979B2 · kind B2 · utility
4Cited by
21References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Oct 29, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/43
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit having a bit body includes a blade face surface on at least one blade extending longitudinally and radially outward over a face of the bit body. The blade face surface of the at least one blade includes a contact zone and a sweep zone. The sweep zone rotationally trails the contact zone with respect to a direction of intended bit rotation about a longitudinal axis of the bit body provides reduce rubbing contact when engaging with a subterranean formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.