Surface modifications for rotary drill bits
US6450271B1 · kind B1 · utility
75Cited by
31References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jul 21, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5671
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary-type drill bit for drilling subterranean formations having areas or components having surfaces exhibiting a relatively low adhesion, preferably nonwater-wettable, surface over at least a portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.