Island Offshore completes open water coil tubing drilling operation

Offshore staff

STAVANGER, Norway – At the beginning of the year, Island Offshore, with its partner Baker Hughes, entered a back-to-back agreement with VTT Maritime, which had been awarded a contract for ground core sampling above the world’s longest [25,5 km (16 mi)] and deepest [385 m (1,263 ft)] subsea road tunnel, named Rogfast.

Together with the end client, Statens Vegvesen, (Norwegian Public Roads Administration), it was decided that Island Offshore’s new coiled tubing drilling method should be applied. Subsequently, Island Offshore has begun its application of coiled tubing drilling technology in Boknafjorden, north of Stavanger, Norway, utilizing a monohull vessel.

This system can construct high angles in the well over a very short distance [up to 15 degrees over 30-m (98-ft) drilled hole]. To avoid a full marine riser spread, Island Offshore developed a subsea injector. A second injector has also been installed onboard the vessel in order to keep the coiled tubing between the subsea injector and the vessel in tension.

The work is being undertaken by Island Performer, Island Offshore’s newest vessel. A total of approximately 440 m (1,444 ft) of core samples will be taken from four individual locations in order to obtain detailed information about the geological conditions of the tunnel route, with water depths ranging from 200 to 300 m (656 to 984 ft).

Island Offshore says that this is the first time an open coiled tubing system has been used in a drilling operation offshore. New equipment and procedures have been developed to introduce a reliable and functional system.

09/15/2014

The Island Performer is working on a contract for ground core sampling above the world's longest and deepest subsea road tunnel, Rogfast.

Did You Like this Article? Get All the Energy Industry News Delivered to Your Inbox

Subscribe to an email newsletter today at no cost and receive the latest news and information.

 Subscribe Now

Whitepapers

Logistics Risk Management in the Transformer Industry

Transformers often are shipped thousands of miles, involving multiple handoffs,and more than a do...

Secrets of Barco UniSee Mount Revealed

Last year Barco introduced UniSee, a revolutionary large-scale visualization platform designed to...

The Time is Right for Optimum Reliability: Capital-Intensive Industries and Asset Performance Management

Imagine a plant that is no longer at risk of a random shutdown. Imagine not worrying about losing...

Going Digital: The New Normal in Oil & Gas

In this whitepaper you will learn how Keystone Engineering, ONGC, and Saipem are using software t...