Fixed cutter drill bits including nozzles with end and side exits
US10954722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2017 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Mar 29, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/0078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit includes a bit body and an internal plenum in the bit body. In addition, the drill bit includes a first flow passage extending from the internal plenum to a bit face. Still further, the drill bit includes a nozzle assembly secured to the bit body at a downhole end of the flow passage. The nozzle assembly has a central axis and includes an outer sleeve and an inner nozzle extending axially through the outer sleeve. The inner nozzle has a first end, a second end opposite the first end, and a radially inner surface extending axially from the first end to the second end. The radially inner surface defines a second flow passage. The inner nozzle also includes a choke disposed along the second flow passage and a side outlet extending radially from the outer surface to the inner surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.