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Seacore's new Comacchio crawler automatic drill rig has made its debut on a four-week site investigation contract in Northern Ireland.

The rig was used with the firm's Skate 3 jack-up pontoon for the landbased part of combined onshore and near-shore site investigations along the route of a proposed wastewater treatment works pipeline and sea outfall at Portrush on the north coast.

Seacore provided a turnkey package of land and marine high quality rock coring, geotechnical and geophysical investigation, underwater video surveying, interpretive reporting and laboratory testing.

The Italian rig is fitted with an automated drill rod changing carousel and sank six 102mm diameter holes to 15m depth, with up to 6m of rotary coring in bedrock.

The Skate 3 is equipped with a CR2 drill derrick and coring system to take samples from two crossings of the River Ban and from the seabed along the outfall route. The rig drilled 13 holes to 16m below seabed, up to 1500m offshore in currents of 2-3 knots and water depths ranging from 3m to 21m.

Seacore used the Goober S triple barrel rotary coring system to recover 102mm diameter, 1.5m long cores, with 100% core recovery. Lankelma CPT also carried out eight over-water cone penetration tests in sands and clays.

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