UK-based energy services provider, Offshore Group Newcastle (OGN), has secured a contract worth £50m from Talisman Sinopec Energy UK, to design and fabricate a 120m-long steel offshore platform support structure jacket for the MonArb project in North Sea.

OGN also secured a multimillion pound contract to design and manufacture the jacket castings, which include two pad eyes of 27t capacity each, and two trunnion nodes of 55t capacity each, to connect the main leg and brace tubulars, which make up the jacket structure that can support a 10,000t deck.

The pad eyes and trunnion nodes will help to lift, rotate and install the 5,400t jacket on the sea-bed at its location in the Montrose / Arbroath field, which is located 130 miles east of Aberdeen.

The MonArb hub is expected to be able to handle 150 million cubic feet per day of gas and 30,000 barrels per day of oil.

The jacket is expected to be ready in spring 2014, while installation is likely to take place in the summer of 2014.

The new platform will be bridge-linked to the operator’s existing Montrose platform.

"The jacket is expected to be ready in spring 2014, while installation is likely to take place in the summer of 2014."

In addition, steel castings maker Vulcan SFM has secured a contract from Talisman Sinopec Energy UK to manufacture four deck lift points, two castings of 35t and two of 38t, four forged pins and four cast sheaths for lifting and installing the deck on top of the jacket.

Under the contract, Vulcan will also supply a ten tonne steel joint for the flare boom on the platform.

Vulcan SFM design director, Paul Mockford, said the castings for the project are critical to the installation and in-service structural integrity of both the jacket and the deck.

"These castings form an integral part of the structure and will need to function for the life of the structure in extremely harsh operating conditions," Mockford added.

Talisman Sinopec Energy UK and its partner Marubeni Oil & Gas (UK) have invested £1.6bn in the MonArb project to extend the life of the oil fields to 2030.

Image: Talisman deck lift points at Vulcan SFM. Photo courtesy of Sheffield Forgemasters International.