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Occupational Safety and Health Administration OSHA

Inspection Detail

Inspection: 107872954 - Chevron Usa Inc

Inspection Information - Office: Wyoming

Nr: 107872954Report ID: 0855610Open Date: 06/14/1991

Chevron Usa Inc
Well #11-8a, Painter Reservoir Unit
Evanston, WY 82931
Union Status: NonUnion
SIC: 1311/Crude Petroleum and Natural Gas
Mailing: P.O. Box 599, Denver, CO 80201

Inspection Type:Accident
Scope:Complete Advanced Notice:Y
Ownership:Private
Safety/Health:Safety Close Conference:06/15/1991
Planning Guide: Safety-Manufacturing Close Case:08/07/1991

Related Activity:TypeIDSafetyHealth
 Accident360789747    

Accident Investigation Summary
Summary Nr: 686261Event: 06/13/1991Employee Killed When Exposed To Excessive Nitrogen
At approximately 2:00 p.m. on June 13, 1991, Employee #1 entered a 6 ft metal meter shed to calibrate a nitrogen flow recorder. The recorder is used to monitor the amount of nitrogen being injected into a gas well in order to enhance the recovery of gas and oil from underground formations. He was calibrating the flow recorder when, for some reason, a piece of stainless steel tubing came loose at a swage fitting, allowing nitrogen to rapidly enter the meter shed at approximately 4,800 psi. Employee #1 was quickly overcome in the nitrogen rich atmosphere and was killed.
Keywords: unsecured, toxic atmosphere, equipment failure, nitrogen, air contamination, gas well drilling, overexposure
Inspection Degree Nature Occupation
1 107872954 Fatality Asphyxia Adjusters and calibrators

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