Well Ops UK completes first West African intervention campaignNews // March 21, 2012
Well Enhancer recently completed work offshore West Africa.
Helix Well Ops UK (Well Ops), a business unit of international energy services company Helix Energy Solutions Group (Helix ESG), has successfully completed a three-month campaign for West Africa's first well intervention work and subsea well operations conducted from a monohull intervention vessel.
Operating the 132m (433ft) long Well Enhancer, Well Ops performed a subsea tree change out, well suspensions, well maintenance and production enhancement on seven wells in water depths of up to 471m (1,545ft).
The project was the deepest operation conducted from Well Enhancer since it joined the fleet in 2009.
Well Enhancer's arrival in the waters west of Africa marked the emergence of monohull-based well intervention services in a region that is experiencing rapid development.
Compared to rig-based methods, intervention programs delivered from monohull vessels provide numerous operational and cost benefits to operators.
Steve Nairn, Well Ops' regional vice president of Europe and Africa, said: "Providing operators with alternatives to rig-based well intervention brings new cost and time efficiencies to West African oil and gas projects.
"Because Well Enhancer deploys more quickly than a rig, and is designed specifically for well intervention work, she reduces down time and helps operators return as quickly as possible to their business of oil and gas production."
Well Enhancer provides remotely operated vehicle (ROV), saturation diving and riser-based and riserless well intervention services. It features a 150-tonne multipurpose tower which is capable of deploying slickline, e-line and coiled tubing tool strings for well interventions in water depths of up to 600m (1,968ft) for wireline and 200m (656ft) for coiled-tubing.
The vessel's other key features include a 7in subsea intervention lubricator which is a conduit for both live well access and well containment, an 18-man saturation diving spread, work and observation class ROVs, kill pumps, and a 100-tonne crane which is rated to operate to water depths of 600m (1,968ft).