Related Story: 12/19/2014: Two Killed, Three Injured In Coal County Drilling Rig Fire
Bellah was from Catoosa. He and Keenan died at the scene. Pittman died 16 days later in the hospital.
OSHA blames the company, Dan D Drilling Corporation, for the fire. It says the company allowed the use of an open-flame heater on the floor of the rig.
It says it had cited the company in June 2013 for allowing the use of an open-flame heater.
OSHA listed seven serious violations against the company. They include failing to provide a quick drenching shower for employees who work with corrosive materials; electrical equipment approved for hazardous locations; and training workers on the chemical and physical hazards of new chemicals at the work site.
OSHA has proposed penalties totaling $221,200 against the company, which as 15 businesses days to respond.