Roller cone drill bit shale diverter
US6533051B1 · kind B1 · utility
63Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg which terminates in a shirttail portion depends from the bit body. The shirttail portion defines a first end face having a first circumferential groove thereon. The first circumferential groove has a radius equal to the radius of a tip of the shirttail portion. A journal is cantilevered from the leg, and a roller cone is rotatably mounted on the journal. The roller cone has a second end face adjacent to the first end face. A second circumferential groove is formed on the second end face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.