Modular hybrid drill bit
US8356398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2011 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Feb 2, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49963
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring bit comprising a bit body is configured at its upper end for connection into a drillstring. A fixed blade depends axially downwardly from the bit body. An axially extending slot is formed in the bit body adjacent the fixed blade. A bit leg is received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, wherein the bit leg cannot be removed from the slot except by axial movement relative to the bit body. A rolling cutter is secured to the bit leg at its lower extent. A fastener secures the bit leg against movement relative to the bit body and extends through oblong apertures in the bit leg and into the bit body, the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.