Challenges include:

Access Limitations: Difficulties in reaching cables located underground or in remote areas.
Severe Contamination: Highly degraded oil may be challenging to purify effectively.
System Downtime: Purification may require cable systems to be offline, affecting operations.
Technical Complexity: Advanced purification methods require skilled personnel and precise control.
Environmental Regulations: Compliance with disposal and emissions regulations can be complex.
Cost Constraints: Balancing the need for effective purification with budget limitations.
Equipment Wear: Purification systems themselves may be subject to wear and contamination.
Addressing these challenges requires careful planning, investment in technology, and skilled management.