Operations Manual
Downlinking Steps 1. The full downlink sequence will be shown, including the timing required between each change of flowrate. 2. Press Auto Down-link to display a list of downlink instructions. 3. To ensure the downlink is received by the RST the instructions displayed must be followed. Downlinks are commonly sent after a survey has been taken, therefore the pumps would have been cycled and been up for 2 minutes. If there is any doubt that the instructions have not been followed, recycle the pumps and wait 2 minutes before downlinking. 4. Press continue when ready to begin the downlink. 5. The current total time for the downlink is shown at the top of the page as well as the current flowrate. Each downlink requires 8 alternations between the two flowrates creating 4 reductions in flow rate, the pulse number shows the current stage of the downlink. The time until the next change in flowrate is shown, when there is 15 seconds remaining a notification will sound on the phone. 6. Press start when ready to begin the downlink and follow the sequence alternating between flowrates when directed. Before starting the downlink process put the smartphone into Airplane mode if possible, to avoid the process being inte rrupted. 7. If the downlink needs to be restarted press stop, the app will remind you to shut the pumps down for 30 seconds before restarting. 8. After each downlink look at the EDR data there should be 4 uniform pulses dropping 25% from the drilling flowrate. 9. Use WITS decoder/viewer to confirm that the correct downlink sequence was performed. 10. Once weight on bit begins to increase indicating bottom has been tagged, increase drilling parameters to desired levels. 11. Check differential pressure on EDR chart, if a large increase is seen when going to bottom, it is likely that the flow to the turbine has been disrupted.
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