Expandable drill bit
US6607046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Nov 10, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit suitable to be connected to a drill string for drilling a borehole into an earth formation, the drill string having a central longitudinal axis, the drill bit comprising a bit body connectable to the lower end of the drill string, and a cutting member provided with cutting devices at the outer surface thereof, the cutting member being rotatable relative to the bit body about a longitudinal axis of rotation extending eccentrically relative to the central longitudinal axis of the drill string, between a first rotational position[ and a second rotational position, whereby in said second rotational position the cutting devices arranged at a larger radial distance from the central longitudinal axis of the drill string than in said first rotational position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.