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The ROCS significantly cuts costs and reduces deck space time. (Image source: Optime Subsea)

The 1,060-m Bonga Field offshore Nigeria underwent a well completion operation with Norwegian supplier Optime Subsea's remotely operated controls system (ROCS) that was deployed on the Shell Nigeria Exploration and Production Company (SNEPCo)-operated site 

“We are very pleased with the performance of the ROCS. It means that we can perform well completion operations quicker, at lower cost, and with substantially lower CO2 footprint compared to conventional systems,” said Justus Ngerebara, lead well engineer at SNEPCo.

The ROCS made the application of umbilicals redundant, significantly cutting costs and reducing deck space-time, resulting in the smooth completion of operations in just a year. By remotely monitoring through a control unit near the wellhead, the ROCS replaces the traditionally hefty task of completing subsea wells through tubing hangers and hydraulic umbilicals. 

Besides saving cost and time, applying ROCS brings down the role of approximately 50 tonnes of equipment to a single basket. 

As the company delivered in African waters for the first time, Optime Subsea's chief service officer, Rodger Hooker said, “To be able to free up valuable deck space immediately after the operation, through shipping the ROCS to shore, is a significant advantage for the rig operator. We are delighted to bring this technology to Nigeria and very grateful for SNEPCo’s innovative and ambitious approach to subsea well completion operations."