Diverter Oporations

Diverter Operations Summary (API RP 64)

Training and Instructions:

1. Develop Written Procedures: Ensure that detailed written procedures for diverting are created and posted on the rig before the drilling operation begins (spudding).
2. Conduct Drills: Design and execute various drills to assess the crew’s readiness and response to different diverting scenarios. These drills should be planned before spudding and scheduled periodically throughout the operations.
3. Document and Analyze Drills: Keep a record of all diverter drills and analyze the results to pinpoint areas where the crew’s performance can be improved.
4. Follow-Up and Improvement: Document any corrective actions taken to enhance crew performance and ensure lessons learned are addressed.
5. Update Emergency Plans: As rig conditions change, ensure that emergency plans and training are kept up-to-date to reflect the current operating environment.

Example of Diverter Procedures (API RP 64):

1. Pick Up Kelly Connection: Raise the kelly connection 2 to 3 feet above the rig floor.
2. Open the Vent Line: Select and open the correct overboard vent line based on the flow volume and prevailing wind direction.
3. Close Diverter and Shale Shaker Valve(s): Secure the diverter and close the shale shaker valve(s) to prevent any further flow into the system.
4. Check Slip Joint Packer Pressure (for Floating Rig): If a floating rig is in use, verify the slip joint packer pressure and make adjustments as necessary.
5. Switch to Kill Fluid: Change over to pumping kill fluid at a rate suitable for the available equipment.
6. Alert Personnel: Notify all rig personnel about the situation and any immediate actions required.
7. Continue Pumping Kill Fluid: Keep pumping kill fluid while preparing to transition to seawater if drilling fluid runs low.
8. Monitor for Gas Bubbles: Assign personnel to observe the vicinity of the drilling vessel for any signs of gas bubbles.
9. Communicate Developments: Keep the person in charge informed of all progress and changes.

Example of Diverter Procedures with a Floater and Subsea BOP Installed:

1. Pick Up Kelly Connection: Raise the kelly connection 2 to 3 feet above the rig floor.
2. Shut the Well In with BOPs: Stop the pump and immediately shut in the well using the blowout preventers (BOPs).
3. Close Diverter and Shale Shaker Valve: Secure the diverter and close the shale shaker valve(s), keeping the vent valve(s) open. Inform the supervisor of the action.
4. Determine Well Control Method: Assess the well conditions and select the appropriate well control procedure.
5. Alert Rig Personnel: Notify all personnel on the rig about the situation and verify the slip joint packer pressure is adjusted as necessary.
6. Shut Down Non-Essential Systems: Extinguish any open flames and power down unnecessary electrical systems to prevent further hazards.
7. Monitor for Gas Bubbles: Immediately post someone to watch for gas bubbles around the rig.
8. Report Diverter Flow or Gas Bubbles: If diverter flow or gas bubbles appear, inform the person in charge immediately for further action.

This summary of diverter operations aligns with the guidelines in API RP 64, providing a structured approach to safely manage well control during drilling operations.