Drill bit for a drilling apparatus
US9523244B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2012 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Nov 7, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/567
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A down-hole drilling apparatus includes a bearing housing defining a longitudinal axis and upper and lower portions. The upper portion of the bearing housing is configured for connection to a drill string, and at least one annular bearing package disposed within the bearing housing. A drill bit is coupled to the bearing housing and rotatable with respect to the longitudinal axis. The drill bit includes a leading body supporting a plurality of cutters thereon for engaging a subterranean rock formation, a shank portion projecting from the leading body, and a mandrel portion engaging the shank portion and defining an inseparable connection therewith. The mandrel portion extends longitudinally into the bearing housing and through the at least one annular bearing package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.