An oil worker was decapitated by a pump jack south of Rawlins on Wednesday.
Peter Robinson, 46, of Rawlins, slipped at a well site and was struck by the counterweight on the pump, according to a preliminary investigation by the Wyoming Occupational and Health Administration.
The incident occurred around 10 a.m., the Carbon County Sheriff's Office said.
OSHA is currently verifying Robinson's employment status, said John Ysebaert, the agency's administrator for standards and compliance.
Robinson was initially reported to be a corporate officer with PDR Enterprises, a private company which had a contract with the owner of the well, Thorofare Resources Inc. Later reports suggest Robinson may have been employed by Thorofare, Ysebaert said.
Robinson was apparently checking on a well near Bridger Pass Road, 10 miles west of state Route 71 south of Rawlins, said Carbon County Sheriff Jerry Colson.
Law enforcement has ruled out foul play in the incident. The case remains under investigation by the sheriff's office and Wyoming OSHA, Colson said.