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What do offshore oil rigs use large chains for?

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Floating rigs use chains for anchoring, just like any other ship would. Except they have 6-12 anchor lines set in a star pattern to secure the rig firmly in place regardless of wind/current direction. read more

So these days, if you find yourself on a rig still using a spinning chain, you have found the wrong rig and drilling company, as they obviously have a poor attitude to safety and are willing to ignore the duty of care implicit in being an employer. read more

Depending on the rig type, offshore rigs are rated to drill in water depths as shallow as 80 feet to as great as 12,000 feet. The greatest water depth a jackup can drill in is 550 feet, and many newer units have a rated drilling depth of 35,000 feet. read more

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oil drilling rig chains
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The Amazing Offshore Oil Rig
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