Apparatus for directional boring under mixed conditions
US6454025B1 · kind B1 · utility
102Cited by
21References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Mar 3, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill head for an apparatus for horizontal directional drilling. The drill head includes a device for detecting angular orientation, a holder for the device for detecting angular orientation, the device for detecting angular orientation being disposed therein, a hammer driven by a liquid and a drill bit. The holder, the hammer and the drill bit are connected head to tail along a longitudinal axis of a drill string with the holder at a proximate end of the drill head and the drill bit at a distal end of the drill head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.