Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling
US6719073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | May 21, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In one aspect, the inserts have an extension length of at least 0.6 inches. A roller cone drill bit is disclosed, including a bit body, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In another aspect, the inserts are arranged such that at most about 20 percent of the inserts are crossed substantially at centerlines thereof by any single plane which contains the axis of the cone axis 10 and which crosses at least two of the inserts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.