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Regulators say the blowout that killed five workers on a Patterson-UTI rig in Oklahoma was the product of a slow-moving series of missed signals, misleading testing, and miscalculations that failed to control a natural gas influx. Linn Energy recently sold its Williston Basin properties for $285 million. This deal brings Linn’s year-to-date total sales agreements to more than $1.5 billion as it financially restructures after bankruptcy. It is known that a well injecting a lot of water near a big fault can lead to earthquakes. The problem is, more often than not those faults are not known until after a tremor.