Shell Offshore has agreed to use Oceaneering International’s Ocean Alliance vessel for its US Gulf of Mexico (GoM) operations.
The company will use the US flagged vessel, which was built in 2010, under a two-year, multi-service vessel charter agreement.
Shell expects to undertake subsea inspection, maintenance and repair (IMR) projects, as well as hardware installations, using the vessel, which has an overall length of 309ft.
IMR projects may feature a range of intervention tasks, including chemical well stimulation and hydrate remediation.
Hardware installations are expected to include flowline jumpers, umbilicals, production trees and flying leads.
The Ocean Alliance vessel, which accommodates 69 people, features a helideck, a 150t active heave compensated crane and a working moonpool.

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By GlobalDataThe vessel features a satellite communications system, which has the capacity to stream video for real-time work observation by shore personnel.
Oceaneering president and CEO Kevin McEvoy said: "We are extremely pleased that Shell has committed to this term agreement with us to support their deepwater GoM operations.
"Shell is one of our largest customers for subsea services in this geographic area, where we expect good growth prospects for the next several years."
Oceaneering delivers engineered services and products, largely to the offshore oil and gas industry, with a focus on deepwater applications.