Subsequent investigation by forensic pathologists determined Hellevik, being exposed to the highest pressure gradient and in the process of moving to secure the inner door, was forced through the 60 centimetres (24 in) in diameter opening created by the jammed interior trunk door by escaping air and violently dismembered, including bisection of the thoracoabdominal cavity which further resulted in expulsion of all internal organs of the chest and abdomen except the trachea and a section of small intestine and of the thoracic spine and projecting them some distance, one section later being found 10 metres (30 ft) vertically above the exterior pressure door. Open the clamp to separate the bell from the chamber system. Not reading for the faint of heart. If it matters, at least death was pretty instantaneous! Five people were killed in the accident. The divers from the Byford Dolphin had something like 20 atmospheres (cant remember exactly off the top of my head) of pressure inside of their bodies. Air rushed out of the chamber with tremendous force, jamming the interior trunk door and pushing the bell away, striking the two tenders. Billy was the diver referred to as Diver 4 (the one that exploded). The Byford Dolphin was working on the Sigyn field in the North Sea when the accident occurred. Pay-outs could be as much as £10m per diver if the action is successful. [7] In 1974–1978, she was named Deep Sea Driller. The diving supervisor would then slightly increase the bell pressure to seal this door tightly. On 17 April 2002, a 44 year old Norwegian worker on the rig was struck on the head and killed in an industrial accident. Hellevik went thought the boot side. Photo credit: Byford Dolphin in Dry Dock by Josef Pavlik CC-SA 3.0. Jake likes this. /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/ReredditLink.f7b66a91705891e84a09.css.map*/tonnes by the air trying to escape. Description. "So many people have been killed and they got away with it," she says. Diving bell accident On 5 November 1983 at 4:00 a.m., while drilling in the Frigg gas field in the Norwegian sector of the North Sea, four divers were in a decompression chamber system attached by a trunk (a short passage) to a diving bell on the rig, being assisted by two dive tenders. Byford Dolphin drilling rig is an Enhanced Aker H-3 design which was built by Aker Group at the Aker Verdal shipyard in 1974. [ARCHIVED THREAD] - The Byford Dolphin diving bell accident...or pressure is no joke! The opening left was crescent shaped and 24 inches across horizontally at it's widest. Posted by 1 year ago. If anyone would like to see what loosing pressure at 300ft below the surface can do in a diving suit, then check this out.. it's Mythbusters so slight NSFW for simulated blood and guts, https://www.youtube.com/watch?v=pRC5R1jRO58, New comments cannot be posted and votes cannot be cast, More posts from the CatastrophicFailure community, Continue browsing in r/CatastrophicFailure. The incident cost the company millions of dollars in lost income. The four divers were, Edwin Coward (British, 35 years old) Roy Lucas (British, 38 years old) Bjørn Giæver Bergersen (Norwegian, 29 years old) Truls Hellevik (Norwegian, 34 years old)[10] Hellevik was about to close the door between the chamber system and the trunk when the chamber explosively decompressed from a pressure of nine atmospheres to one atmosphere in a fraction of a second. Five workers were working in the North Sea on a Norwegian semi-submersible oil rig. 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