Drilling device
US5996710A · kind A · utility
2Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jan 12, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling device has a frame (1) with a feed device (2) for carrying a drilling device (3) movable to-and-fro for rotating a drill string (4). The drilling device includes a sensor (6) for sensing an end (7) of a drill string element (8) in the drill string (4), and a register for the position of the end (7) along the feed device (2) and for the displacement of the drilling device (3) along the feed device (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.