Rockbit with attachable device for improved cone cleaning
US6763902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | May 16, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/61
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rolling cone rock bit having one or more nozzle retention bodies attached by a single orientation mounting is disclosed, as is the associated method for its manufacture. The upper end of the nozzle retention body has a fluid inlet in communication with the internal fluid plenum of the drill bit, and the lower end of the nozzle retention body includes a fluid outlet that defines an exit flow angle. The fluid outlet is located between two rolling cones, but is positioned closer to one of the cones than the other. Further, the exit flow angle is preferably within 3 degrees of parallel to the drill bit longitudinal axis and, even more preferably, is parallel with the drill bit longitudinal axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.