New DNV class jacking gearboxes delivered in less than 12 weeks

Delivering complete gearbox reliability to customers across the globe is at the heart of David Brown Santasalo’s mission and when Willteco needed drop in replacements for the jack up rig gearboxes on an offshore drilling rig in the North Sea, David Brown (now David Brown Santasalo) was a clear choice.

Case Study

Delivering complete gearbox reliability to customers across the globe is at the heart of David Brown Santasalo’s mission and when Willteco needed drop in replacements for the jack up rig gearboxes on an offshore drilling rig in the North Sea, David Brown (now David Brown Santasalo) was a clear choice.

As the rig operator’s technical partner, Willteco maintains the jacking system and called upon David Brown Santasalo as the original manufacturer of the WECO jack up rig gearboxes to provide drop in replacements. The original units were delivered in the 1980s under David Brown Santasalo’s heritage WECO brand, and after more than 25 years of complete reliability were nearing the end of their service life.

In the offshore oil industry speed is key as downtime can be very expensive and in recognition of this, David Brown Santasalo delivered 6 complete jack up rig gearboxes, as well as 8 gear cases for the customer’s stock of spare units within a 12 week timeframe.

Utilising centuries of global gear engineering expertise as well as more than 6 decades of experience in the oil and gas industry, David Brown Santasalo is well equipped to provide the expert gearing support needed to maximise process availability.


The gearboxes are specifically designed to endure demanding service conditions, reaching no less than 411 m.kN dynamic low speed torque and 562.5 m.kN torque for storm conditions. Their high ratio, with a 1/5229 reduction moving from 1670rpm to 0.32rpm alongside David Brown Santasalo’s design expertise, manufacturing processes and DNV class approval ensures each jack up rig gearbox is capable of handling this arduous drilling application.


Committed to supporting its customer’s right across the globe, David Brown Santasalo’s local service presence enables it to deliver the market leading gearbox support needed in the offshore oil and gas industry.


As the original equipment manufacturer of key gearing brands such as WECO, GEC, Bostock and Bramley, Sonnerdale Richardson, Benoni Engineering Works and Beyer, David Brown Santasalo is the expert when it comes to servicing, repairing or upgrading its legacy brands.

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Case Study: New DNV class jacking gearbox for major offshore rig

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