Operations Manual
Drilling / Steering Troubleshooting
Drilling Issue
Corrective Actions
Persistent Stick-Slip Conditions (Refer to stick-slip identification section)
1. Pick up off bottom 2. Increase surface RPM by 5-10 and decrease WOB by 5% 3. If stick-slip persists repeat steps 1+2, ensure bit RPM does not exceed max value for the RST size. 4. The following can be carried out to determine the parameter thresholds that are causing the stick-slip 5. Come off bottom, shut down pumps and rotary 6. Return pumps and rotary to previous levels 7. Slowly return to bottom, increasing WOB until stick-slip returns 8. Back off WOB until stick-slip conditions are removed 1. Pick up off bottom 2. Decrease surface RPM by 5-10 3. Increase WOB by 5% 4. The following can be carried out to determine the parameter thresholds that are causing the axial/lateral vibration 5. Come off bottom and shut down pumps and rotary 6. Return pumps and slowly return to bottom 7. Gradually increase WOB and RPM until vibration returns 8. Gradually decrease RPM and increase WOB until vibration ceases 1. If a permanent large increase in SPP is observed, ensure that all relevant personnel on-site are aware, if the increase is due to a plugged jet this may lead to RST being over-pressurised. 2. If a permanent decrease in SPP is observed, this could be due to a motor failure or washed component, and could lead to the RST being underpowered.
High axial and lateral vibration (Refer to axial and lateral vibration identification section)
Large increase/ decrease in standpipe pressure
OPS-FIELD-001 | Rev. H
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