Hybrid drill bit having increased service life
US9782857B2 · kind B2 · utility
1Cited by
306References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Dec 16, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of improving the service life of a drill bit comprises creating a weldment between load bearing portions of the drill bit where the weldment has a preselected root gap greater than about 25 mils and a preselected root face greater than about 25 mils, and where the weldment has a material property greater than the materials being joined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.