Offshore valve greasing involves using specialized equipment and lubricants to maintain and service valves without shutting them down. This is often done through an “online” process that injects grease into the valve, flushing out old material and providing lubrication. Automated systems can be used to perform this remotely, reducing risk and downtime by eliminating the need for personnel to enter hazardous areas.
Methods and equipment
- Online flushing and greasing: This service involves flushing out old lubricant and debris before injecting a new lubricant to enhance valve performance and longevity without taking the valve offline.
- Automated greasing systems: These systems use a remote-control skid with a human-machine interface (HMI) to control a grease-injection unit (GIU) located near the valves.
- High-pressure greasing guns: These are used for manual greasing and are designed for harsh environments like offshore settings, capable of pumping various lubricants, sealants, and packings.
- Specialized lubricants and sealants: Synthetic and high-performance lubricants are used to withstand high temperatures, pressure, and harsh conditions, including resistance to hydrocarbons, water, and acids.
Key benefits
- Reduced downtime: Online maintenance allows for servicing without interrupting operations.
- Enhanced safety: Automated systems can move personnel out of “red zones” during lubrication, minimizing exposure to hazardous conditions.
- Extended valve life: Regular, proper lubrication helps maintain valve integrity, reliability, and operational efficiency.
- Improved efficiency: Automated systems can apply the correct amount of grease, which can help reduce consumption.
Considerations
- Always follow the manufacturer’s guidelines and valve service literature for maintenance procedures.
- Use the correct lubricant specified for the valve’s service conditions (e.g., sour service, high temperatures).
- Ensure that grease is injected until the air release no longer occurs, or until the recommended pressure is reached, to prevent air pockets.
- Follow safe work practices and ensure technicians are properly trained for the specific equipment and tasks.
