An offshore oil rig off the West Coast is being reactivated as part of a federally funded initiative. To bring the rig back online, the operator needed to replace critical legacy motors that had not been manufactured in decades.
Romanoff Industries, an MCE company, was asked to source a matching pair of motors to meet performance and dimensional requirements without requiring a complete system redesign.
The Challenge
The customer required two matching motors rated at:
- 300 horsepower
- 514 RPM
- 4,160 volts
The original motors were General Electric units from the 8000 frame series, manufactured more than three decades ago. Exact replacements were no longer readily available.
Ordering newly manufactured replacements through the current holders of the original product line would have involved:
- Extended international manufacturing and shipping timelines
- Significant cost
- Complex procurement logistics
Additionally, the motors needed to meet CSA (Canadian Standards Association) Class 1, Division 2 certification requirements, standards commonly applied in regulated oil and gas environments.
Because the motors were being installed on an offshore rig, dimensional accuracy was critical. The replacement units needed to match the original frame size exactly to fit within the existing equipment footprint.
The Solution
MCE identified two motors within its inventory that shared the same frame size as the originals but carried different performance ratings. Working with outside partners, including a motor design and rebuild specialist, the team determined the motors could be redesigned and remanufactured to meet the required 300 HP and 514 RPM specifications.
The redesign process included engineering modifications and certification compliance to meet CSA Class 1, Division 2 standards.
The Result
By redesigning and remanufacturing existing motors, the customer achieved:
- Approximately one year of lead-time savings
- Roughly 75% cost savings compared to new production
- A dimensionally compatible solution that fit the existing footprint
- Compliance with required safety certifications
The project remains in progress, with completion expected at the end of March.