TheSea Quest was asemi-submersibledrilling rig. She discovered theUK's firstNorth Sea oil on 14 September 1969 in the Arbroath Field.[1][2] She also discovered the first giant oil field namedForties on 7 October 1970.[2][3]
TheSea Quest was built by BelfastshipbuildersHarland & Wolff forBP at a cost of £3.5 million and launched on 8 January 1966.[4]The entire structure was 320 feet (98 m) high and weighed 150,000 tons, including three legs each 35 feet (11 m) in diameter and 160 feet (49 m) long that could be partially filled with water to control the height of the platform above the sea.[5][6]
In 1977,Sea Quest was sold toSedco (now part ofTransocean) and renamedSedco 135C.[2][7] She was towed to the west coast of Africa. On 17 January 1980, while drilling in the Warri area,Nigeria, ablowout occurred and the rig sustained extensive fire damage. The rig was then deliberately sunk in deep water.[2]
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