Subsea 7 has won extensions for two underwater services contracts worth a combined $240m from Shell Upstream International Europe.
The life of field contract extensions for diving support vessel (DSV) and remotely operated vehicle support vessel (ROVSV) services will start in 2016.
Subsea 7 will continue to deliver subsea construction, inspection, repair, maintenance and decommissioning services to Shell’s offshore fields and facilities in the UK.
The DSV deal will run through to the third quarter of 2018. The ROV section covers a minimum of 100 vessel days per year and runs to the second quarter of 2018.
Subsea 7’s North Sea fleet, including the Seven Atlantic for the DSV work scope, will carry out the underwater services contracts.
The companies will implement the related project management and engineering support for the contracts from their offices in Aberdeen.
Subsea 7 vice-president for UK and Canada Phil Simons said: "An award of this importance recognises our strong track record in providing life of field expertise, high quality vessels and safe and efficient operations to Shell since our support of their subsea operations began in 1984."
Subsea 7 provides seabed-to-surface engineering, construction and services to the offshore energy industry.
Shell has stakes in over 50 fields, operating more than 30 offshore installations, 30 subsea installations and two floating production storage and offtake vessels.