Flow diverter ring for a rotary drill bit and method
US5740871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary cone drill bit for forming a borehole having a bit body with an upper end portion adapted for connection to a drill string. A number of angularly-spaced support arms formed to extend from the bit body. Each support arm has an inside surface with a spindle connected thereto and an outer surface. A number of cutter cones equal to a number of support arms are rotatably mounted on respective spindles. Each of the cutter cones includes an integral cylindrical cavity for receiving the respective spindle. A gap with a generally cylindrical portion is formed between the spindle and the cavity with a seal element disposed within the gap. The gap has an opening contiguous with the bottom edge of the outer surface and extending outwardly from the spindle. A bearing element is disposed within each gap between the exterior of the respective spindle and the interior of the respective cavity. A seal element is disposed within each gap to seal between the respective spindle and the interior of the respective cavity. A diverter ring is disposed on the exterior of each spindle approximate to the respective inside surface and located within the opening to the respective gap. The diverter rin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.