What 'b' term in the drilling industry means 'a sudden, uncontrolled release of underground pressure from the well' and is also a hair styling technique involving the flattening and straightening of hair?

Oil is measured in barrels, which is equal to 42 US gallons or 159 liters.

Venezuela leads the world with 300.9 billion barrels of oil reserves – a 17.8 per cent share of global reserves.