Air percussion drilling assembly for directional drilling applications
US5305837A · kind A · utility
49Cited by
8References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Jul 17, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impact energy to the formation and rotates during operation independent of an attached drill string. The air percussion hammer assembly is therefore ideally suited to directional drilling activities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.