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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 170703243 - Employee Injured When Struck By Broken Chain

Accident: 170703243 -- Report ID: 0950626 -- Event Date: 03/10/1992
InspectionOpen DateSICEstablishment Name
11212127207/02/19921381Cleveland Drilling
At approximately 4:30 p.m. on March 10, 1992, Employee #1 was working on the floor of drilling rig #6, at well 323X-252, Chevron lease, Elk Hills, Taft, CA. Employee #1 was using a spinning chain to make up a drill pipe connection. The spinning chain was attached to a wire rope that was attached to the break-out cathead. The driller was operating the cathead while the spinning chain had 4 or 5 wraps on the drill pipe. The chain was rotating the pipe to make up the stand of pipe onto the pipe in the well. With about one turn remaining to make up the joint, the chain seized on the pipe, causing the chain to break near the wire rope connection. The chain flew toward the drill pipe, and struck Employee #1 on both arms near the wrists. He was taken to Memorial Hospital, Bakersfield, where he was treated for a fracture to his right forearm. Employee #1 remained in the hospital for two days.
Keywords: fracture, forearm, oil well drilling, equipment failure, struck by, flying object, gas well drilling, broken chain
Employee # Inspection Age Sex Degree Nature Occupation
1 112121272 Hospitalized injury Fracture Helpers, extractive occupations

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