Downhole safety switch and communication protocol
US11268376B1 · kind B1 · utility
4Cited by
401References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Mar 27, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system includes a surface device, preferably positioned on a surface, a downhole device, and a wireline communications system. A downlink communication between the surface device and the downhole device occurs via Hopped Frequency Shift Keying (HFSK) voltage-modulated signals. An optional uplink communication between the downhole device and the surface device may occur via Frequency Shift Keying (FSK) current-modulated signals. The downhole device may comprise an addressable switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.