Saipem’s robots set to cap undersea oil blowouts
System adopted by industry-funded group backed by the likes of BP and ExxonMobil
Italian oil and gas services company Saipem has developed a new undersea system capable of remotely capping oil well blowouts in shallow water as part of an industry-wide push to improve response times following BP’s Gulf of Mexico disaster in 2010.
The system, known as Offset Installation Equipment, solves a problem that has long vexed the oil industry — how to get access to well blowouts when surface clean-up and containment operations stop ships from entering exclusion zones directly above the damaged wells.
The system, which was tested offshore Italy in March, has now been adopted by Oil Spill Response Limited, an industry-funded group backed by BP, Chevron, ConocoPhillips, ExxonMobil, Petrobras, Royal Dutch Shell, Equinor (formerly Statoil) and Total SA.
Saipem’s design, which utilises huge underwater balloons, robotic guides and complex pulley systems, has been adopted as a means of moving so-called capping stacks into place from up to 500 metres away.
These massive near 100 tonne blocks can be placed over blown out wells, buying oil companies time to seal and kill oil spills at source.
“It was essential to find a way to move the capping stack while staying away from the well,” said Diego Lazzarin at Saipem, who helped design and test the system.
“It’s like moving over one hundred Fiat 500s, underwater, from 500 metres away and placing it within an inch of precision.”
Four capping stacks have been placed in Norway, Singapore, Brazil and South Africa to provide global coverage and ensure relatively quick access in the result of a future well blowout. Saipem’s Offset Installation Equipment is stored and maintained in Trieste, Italy.
Mr Lazzarin said the Saipem system should allow blowouts to be capped in “just a few days” compared to the months it took BP in 2010, when they had to design and build its capping stack from scratch.
“I think that we are safer than before for sure,” Mr Lazzarin said.
The system is the result of six years’ work by the Subsea Well Intervention Project, which was established by the industry in the wake of BP’s Deepwater Horizon disaster, when almost 5m barrels of crude leaked before the company could successfully seal the well.
While BP’s incident occurred in very deep water, which presented its own challenges, shallow water well blowouts could also be problematic because sea currents were less likely to move the oil away from above the well, limiting vertical access from ships.
Matt Clements, director of subsea well intervention at Oil Spill Response Limited, said it gave the industry an important tool for responding quickly to shallow water blowouts.
“There is no other equipment in the world that can do this,” Mr Clements said.
“It’s a significant investment from industry designed specifically for scenarios when you cannot get direct vertical access to the wellhead. It will save an awful lot of time.”