Method and apparatus for improved communication in a wellbore utilizing acoustic signals
US5995449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 18, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus is provided for communicating a control signal in a wellbore between a transmission node and a reception node through an acoustic transmission pathway which extends between the transmission node and the reception node. A transmission apparatus is provided at the transmission node which is in communication with the acoustic transmission pathway. The transmission apparatus generates a serial acoustic transmission which includes a control signal. A reception apparatus is provided at the reception node. The reception apparatus includes a sensor assembly which detects the serial acoustic transmission. Furthermore, the reception apparatus includes a means for decoding the control signal from the series acoustic transmission. The reception apparatus also includes a clock for generating a synchronizing clock signal and a demodulator which maps a predefined plurality of available control signals to a predefined output at a particular one of a plurality of available output pins in the reception apparatus. An electrically actuable wellbore tool is electrically coupled to a particular one of the plurality of available output pins, and may be actuated by the predefined ou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.