Rigs Do Explode, if they blow-in and the preventer fails.
Had a good friend in College who was the only survivor of a blow-out and rig fire. Back in the mid 1960’s.
It is possible that someone torched it, but I am very doubtful that happened. Drilling for oil has always been a very risky and dangerous business.
And rigs do sink.
The Ocean Ranger went down in 1982 with no survivors of the 84 man crew.