Downhole inductively coupled digital electronic system
US6459383B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A communication system between remote locations connected by a common wire conductor where AC power (40) is supplied from one location to one or more remote locations (32 and 34). At the remote locations, inductor coil components (28,32) and (30,34) provide power to an instrument (24,26). The AC power is modulated with surface selected discrete frequencies (56) to operate a specific selected remote location. At the selected remote location (24), the AC power is rectified and a logic processor detects the discrete frequencies for that location and operates the instrument. Data from the instrument is translated by current modulation (60) which is demodulated at the one location (50,64,66,68,70).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.