Reverse circulation hybrid bit
US11428050B2 · kind B2 · utility
0Cited by
295References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2015 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Dec 24, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hybrid rotary drill bit having at least one fixed blade and at least one rolling cutter assembly is configured for reverse fluid flow from an annulus, through junk slots and into a fluid pathway system located substantially centrally to a bit body. The fluid pathway system may be located underneath a portion of the at least one fixed blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.