Julian Stoll, the new manager of the Billings ConocoPhillips refinery, has his work cut out for him: overseeing the shutdown of the plant for maintenance and the replacement of two huge coke drums.

Two giant pieces of refining equipment have reached their final destination with the installation Tuesday morning of a second new coke drum at the ConocoPhillips oil refinery. The world’s fourth ...

BILLINGS — A fire at the ConocoPhillips refinery that spewed thick black smoke into the air on Christmas Eve was caused when a heater inside the tank ignited oil vapors, ...