| 摘要 |
Methods and systems for a backup emergency disconnect signal (EDS) transmission in an offshore oil and gas installation are provided. A backup EDS transmission system includes a pressure pulse generator located close to a water surface and configured to generate a predetermined pressure variation pattern including at least one of positive and negative pressure pulses and corresponding to an emergency disconnect signal, the signal being propagated downwards in a mud column. The pressure pulse generator is located at a surface end of the mud column. The backup EDS transmission system also includes a pressure pulse receptor connected to a controller of blowout preventers and configured to measure a pressure in the mud column, at a subsea location. Figure 6 300 Start Generating a pressure variation pattern corresponding to the EDS signal at a first location which is close to a surface end of a mud column /-S320 Measuring pressure values in the mud column, at a second location which is close to blowout preventers Identifying the pressure variation pattern corresponding to the EDS signal based on the pressure values 5(-S340 Transmitting the EDS signal to a controller configured to close the blowout preventers C Stop |
