Transocean says four more rigs now out of work

Four more Transocean Ltd  rigs are without contracts, according a fleet update on Tuesday, reflecting a broader slump in demand for some of the older rigs run by the world's largest drilling contractor.
Switzerland-based Transocean has been quicker than rivals to pull rigs off the market, or "stack" them, in response to any perceived weakness in demand.
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Source: Reuters