Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Seabed yields its secrets

UK MARINE geotechnical drilling contractor Seacore has completed a major seabed survey in north east Atlantic Ocean for British Geological Survey.

It aimed to identify and date a number of beds and unconformities recorded in the seabed by geophysical surveys at 11 locations on Hatton Bank, west of the Shetland Islands, in the Bean Basin off the west of Ireland and in waters off the Faroe Islands.

Seacore drilled 14 boreholes in water depths approaching 1600m on the 45 day contract commissioned by BGS's Petroleum and Marine Geology Department and its consortium partners Rockall Studies Group and Petroleum Infrastructure Programme, Ireland.

The deepest borehole went 177m into the seabed and the deepest site (in terms of water depth) needed 1566m of drill string to reach the seabed, with a further 71m for coring. A 4.5m long core barrel developed by BGS was used to give high recovery of good quality 75mm diameter core.

BGS geologists and technicians worked around the clock on board the drill ship, identifying, logging and packaging the cores and servicing the core barrels.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.