The OneSubsea venture between Cameron and Schlumberger has trumpeted its work on Chevron’s deepwater Jack-St. Malo fields in the Gulf of Mexico, which came onstream towards the end of last year.
In December Chevron announced it had achieved first oil from the fields (see DI, 10 December 2014, page 6), and OneSubsea – which through one of its predecessors in 2010 won the contract to supply the subsea production and processing systems for the project –points out that the end product included the delivery of 12 15,000 psi subsea wellhead trees, production controls, four manifolds and associated connection systems, engineering and project management.
In 2011, it added, and through another of its predecessor companies, it was also awarded the subsea processing systems contract for three pump stations, three subsea pump control modules and associated control and instrumentation equipment on the fields. “The pump systems, which are comprised of three megawatt single phase pumps, are remarkable for their combination of 13,000 psi design pressure and 2,100 m (7,000 ft) installed water depth,” it states.
The fields are located within 40 km (25 miles) of each other and approximately 450 km (280 miles) south of New Orleans. The project comprises three subsea centres tied back to a floating semisubmersible production hub facility with a capacity of 170,000 b/d of oil and 42.4 MMcf/d of gas.