Crown Plugs (subsea)

Incorrect. This is the function of the flow tee, not the crown plug.

Correct! The crown plug acts as a valve to isolate and control the flow of fluids from the well.

Incorrect. While corrosion protection is important in subsea wells, it's not the primary function of the crown plug.

Incorrect. Pressure regulation is handled by other components in the wellhead system.

Incorrect. Manually operated crown plugs require physical interaction.

Correct! Hydraulically operated crown plugs are controlled remotely using hydraulic pressure.

Incorrect. While ball plugs are a type of crown plug, they can be operated manually or hydraulically.

Incorrect. The flow tee is a junction point and not a type of crown plug.

Incorrect. Crown plugs contribute to well integrity by isolating the well.

Incorrect. Crown plugs provide flexibility by allowing for flow control and diversion.

Incorrect. Crown plugs help prevent leaks and blowouts, reducing environmental impact.

Correct! While crown plugs indirectly contribute to efficiency, their primary role is safety and control, not directly enhancing production efficiency.

Incorrect. The crown plug is located at the top of the wellhead.

Incorrect. This is the location of the flow tee, not the crown plug.

Correct! The crown plug sits directly above the flow tee, which acts as a junction for flow lines.

Incorrect. The crown plug is an external component located on top of the wellhead.

Incorrect. While ball plugs are relatively reliable, they still require maintenance like any other valve.

Correct! Ball plugs are known for their ability to handle high flow rates and pressures.

Incorrect. Ball plugs can be challenging to operate manually due to their size and weight.

Incorrect. Ball plugs are generally designed for unidirectional flow.

Steps to Isolate the Leaking Flow Line:

1. Activate Emergency Procedures: Alert the platform personnel of the emergency situation and activate the appropriate safety protocols. This may include evacuating personnel from the platform if necessary.
2. Contact Operations and Maintenance: Inform the operations team and maintenance personnel about the leak and the need to isolate the flow line.
3. Verify Crown Plug Status: Ensure the hydraulic system is functioning correctly and that the crown plug is ready for operation. Check for any pressure or hydraulic fluid leaks.
4. Isolate the Leaking Flow Line: Use the hydraulic system to close the crown plug, effectively isolating the leaking flow line.
5. Confirm Isolation: Verify that the leaking flow line is completely isolated by checking for pressure readings and flow rate indicators.
6. Monitor the Situation: Continuously monitor the isolated flow line for any signs of leakage or pressure build-up.
7. Initiate Repair Procedures: Contact the appropriate personnel to schedule a repair of the leaking flow line.

Safety Considerations:

• Emergency Equipment: Ensure that all emergency equipment (lifeboats, fire extinguishers, etc.) is readily available and in working condition.
• Emergency Drills: Conduct regular emergency drills to ensure personnel are familiar with safety procedures in case of a leak.
• Personal Protective Equipment (PPE): All personnel involved in the isolation procedure should wear appropriate PPE, such as safety helmets, protective clothing, and respiratory masks.
• Communication and Coordination: Maintain clear communication between platform personnel, operations team, and maintenance personnel throughout the entire process.

Communication:

• Platform Personnel: Inform all personnel on the platform about the leak and the isolation procedure.
• Operations Team: Inform the operations team about the leak and the steps taken to isolate it.
• Maintenance Personnel: Contact the maintenance team to schedule repair of the leaking flow line.
• Authorities: If the leak poses a significant environmental risk, contact relevant authorities (e.g., maritime safety agencies, environmental protection agencies) to report the incident.