Directional boring
US5778991A · kind A · utility
53Cited by
33References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A directional boring apparatus is disclosed where the apparatus is controlled through a method which includes deviating a drill head from a straight path into a desired direction angled away from the straight path. The deviation is achieved by applying an axial force to the drill head when a drill head cutting member is positioned within an arc of rotation through which the desired direction passes. The drill head is retracted when the cutting member is outside of the arc of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.