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.