Downhole downlinking system employing a differential pressure transducer
US8408331B2 · kind B2 · utility
6Cited by
23References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2010 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Jan 11, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool includes a downlinking system deployed in a downhole tool body having an internal through bore. The downlinking system includes a differential pressure transducer configured to measured a pressure difference between drilling fluid in the internal through bore and drilling fluid external to the tool (in the borehole annulus). The differential transducer is electrically connected with an electronic controller (deployed substantially anywhere in the drill string) that is configured to receive and decode pressure waveforms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.