Navigation system
US9206645B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2011 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Dec 20, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a navigation system for navigating a drill head out of or in collision with a casing in a first borehole. The system comprises a drill head drilling a second borehole; a drill string made of several tubulars mounted into one tubular string by means of a connection means, the drill head being mounted onto one end of the drill string; and a plurality of logging units arranged with one logging unit in or in relation to each connection means. Each logging unit comprises a data transmitter and a data receiver for sending and receiving data between the logging units; and a detector, at least one logging unit comprising an emitter. Furthermore, the invention relates to a navigation method using the navigation system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.